summaryrefslogtreecommitdiff
path: root/gcc/ada/sem_prag.adb
blob: e4689a67e35aa426caa5179a4675abf976100aca (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
5826
5827
5828
5829
5830
5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
5865
5866
5867
5868
5869
5870
5871
5872
5873
5874
5875
5876
5877
5878
5879
5880
5881
5882
5883
5884
5885
5886
5887
5888
5889
5890
5891
5892
5893
5894
5895
5896
5897
5898
5899
5900
5901
5902
5903
5904
5905
5906
5907
5908
5909
5910
5911
5912
5913
5914
5915
5916
5917
5918
5919
5920
5921
5922
5923
5924
5925
5926
5927
5928
5929
5930
5931
5932
5933
5934
5935
5936
5937
5938
5939
5940
5941
5942
5943
5944
5945
5946
5947
5948
5949
5950
5951
5952
5953
5954
5955
5956
5957
5958
5959
5960
5961
5962
5963
5964
5965
5966
5967
5968
5969
5970
5971
5972
5973
5974
5975
5976
5977
5978
5979
5980
5981
5982
5983
5984
5985
5986
5987
5988
5989
5990
5991
5992
5993
5994
5995
5996
5997
5998
5999
6000
6001
6002
6003
6004
6005
6006
6007
6008
6009
6010
6011
6012
6013
6014
6015
6016
6017
6018
6019
6020
6021
6022
6023
6024
6025
6026
6027
6028
6029
6030
6031
6032
6033
6034
6035
6036
6037
6038
6039
6040
6041
6042
6043
6044
6045
6046
6047
6048
6049
6050
6051
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061
6062
6063
6064
6065
6066
6067
6068
6069
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079
6080
6081
6082
6083
6084
6085
6086
6087
6088
6089
6090
6091
6092
6093
6094
6095
6096
6097
6098
6099
6100
6101
6102
6103
6104
6105
6106
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116
6117
6118
6119
6120
6121
6122
6123
6124
6125
6126
6127
6128
6129
6130
6131
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
6144
6145
6146
6147
6148
6149
6150
6151
6152
6153
6154
6155
6156
6157
6158
6159
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
6265
6266
6267
6268
6269
6270
6271
6272
6273
6274
6275
6276
6277
6278
6279
6280
6281
6282
6283
6284
6285
6286
6287
6288
6289
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
6328
6329
6330
6331
6332
6333
6334
6335
6336
6337
6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
6365
6366
6367
6368
6369
6370
6371
6372
6373
6374
6375
6376
6377
6378
6379
6380
6381
6382
6383
6384
6385
6386
6387
6388
6389
6390
6391
6392
6393
6394
6395
6396
6397
6398
6399
6400
6401
6402
6403
6404
6405
6406
6407
6408
6409
6410
6411
6412
6413
6414
6415
6416
6417
6418
6419
6420
6421
6422
6423
6424
6425
6426
6427
6428
6429
6430
6431
6432
6433
6434
6435
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
6452
6453
6454
6455
6456
6457
6458
6459
6460
6461
6462
6463
6464
6465
6466
6467
6468
6469
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
6499
6500
6501
6502
6503
6504
6505
6506
6507
6508
6509
6510
6511
6512
6513
6514
6515
6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
6528
6529
6530
6531
6532
6533
6534
6535
6536
6537
6538
6539
6540
6541
6542
6543
6544
6545
6546
6547
6548
6549
6550
6551
6552
6553
6554
6555
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
6574
6575
6576
6577
6578
6579
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
6593
6594
6595
6596
6597
6598
6599
6600
6601
6602
6603
6604
6605
6606
6607
6608
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
6623
6624
6625
6626
6627
6628
6629
6630
6631
6632
6633
6634
6635
6636
6637
6638
6639
6640
6641
6642
6643
6644
6645
6646
6647
6648
6649
6650
6651
6652
6653
6654
6655
6656
6657
6658
6659
6660
6661
6662
6663
6664
6665
6666
6667
6668
6669
6670
6671
6672
6673
6674
6675
6676
6677
6678
6679
6680
6681
6682
6683
6684
6685
6686
6687
6688
6689
6690
6691
6692
6693
6694
6695
6696
6697
6698
6699
6700
6701
6702
6703
6704
6705
6706
6707
6708
6709
6710
6711
6712
6713
6714
6715
6716
6717
6718
6719
6720
6721
6722
6723
6724
6725
6726
6727
6728
6729
6730
6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
6746
6747
6748
6749
6750
6751
6752
6753
6754
6755
6756
6757
6758
6759
6760
6761
6762
6763
6764
6765
6766
6767
6768
6769
6770
6771
6772
6773
6774
6775
6776
6777
6778
6779
6780
6781
6782
6783
6784
6785
6786
6787
6788
6789
6790
6791
6792
6793
6794
6795
6796
6797
6798
6799
6800
6801
6802
6803
6804
6805
6806
6807
6808
6809
6810
6811
6812
6813
6814
6815
6816
6817
6818
6819
6820
6821
6822
6823
6824
6825
6826
6827
6828
6829
6830
6831
6832
6833
6834
6835
6836
6837
6838
6839
6840
6841
6842
6843
6844
6845
6846
6847
6848
6849
6850
6851
6852
6853
6854
6855
6856
6857
6858
6859
6860
6861
6862
6863
6864
6865
6866
6867
6868
6869
6870
6871
6872
6873
6874
6875
6876
6877
6878
6879
6880
6881
6882
6883
6884
6885
6886
6887
6888
6889
6890
6891
6892
6893
6894
6895
6896
6897
6898
6899
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
6911
6912
6913
6914
6915
6916
6917
6918
6919
6920
6921
6922
6923
6924
6925
6926
6927
6928
6929
6930
6931
6932
6933
6934
6935
6936
6937
6938
6939
6940
6941
6942
6943
6944
6945
6946
6947
6948
6949
6950
6951
6952
6953
6954
6955
6956
6957
6958
6959
6960
6961
6962
6963
6964
6965
6966
6967
6968
6969
6970
6971
6972
6973
6974
6975
6976
6977
6978
6979
6980
6981
6982
6983
6984
6985
6986
6987
6988
6989
6990
6991
6992
6993
6994
6995
6996
6997
6998
6999
7000
7001
7002
7003
7004
7005
7006
7007
7008
7009
7010
7011
7012
7013
7014
7015
7016
7017
7018
7019
7020
7021
7022
7023
7024
7025
7026
7027
7028
7029
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046
7047
7048
7049
7050
7051
7052
7053
7054
7055
7056
7057
7058
7059
7060
7061
7062
7063
7064
7065
7066
7067
7068
7069
7070
7071
7072
7073
7074
7075
7076
7077
7078
7079
7080
7081
7082
7083
7084
7085
7086
7087
7088
7089
7090
7091
7092
7093
7094
7095
7096
7097
7098
7099
7100
7101
7102
7103
7104
7105
7106
7107
7108
7109
7110
7111
7112
7113
7114
7115
7116
7117
7118
7119
7120
7121
7122
7123
7124
7125
7126
7127
7128
7129
7130
7131
7132
7133
7134
7135
7136
7137
7138
7139
7140
7141
7142
7143
7144
7145
7146
7147
7148
7149
7150
7151
7152
7153
7154
7155
7156
7157
7158
7159
7160
7161
7162
7163
7164
7165
7166
7167
7168
7169
7170
7171
7172
7173
7174
7175
7176
7177
7178
7179
7180
7181
7182
7183
7184
7185
7186
7187
7188
7189
7190
7191
7192
7193
7194
7195
7196
7197
7198
7199
7200
7201
7202
7203
7204
7205
7206
7207
7208
7209
7210
7211
7212
7213
7214
7215
7216
7217
7218
7219
7220
7221
7222
7223
7224
7225
7226
7227
7228
7229
7230
7231
7232
7233
7234
7235
7236
7237
7238
7239
7240
7241
7242
7243
7244
7245
7246
7247
7248
7249
7250
7251
7252
7253
7254
7255
7256
7257
7258
7259
7260
7261
7262
7263
7264
7265
7266
7267
7268
7269
7270
7271
7272
7273
7274
7275
7276
7277
7278
7279
7280
7281
7282
7283
7284
7285
7286
7287
7288
7289
7290
7291
7292
7293
7294
7295
7296
7297
7298
7299
7300
7301
7302
7303
7304
7305
7306
7307
7308
7309
7310
7311
7312
7313
7314
7315
7316
7317
7318
7319
7320
7321
7322
7323
7324
7325
7326
7327
7328
7329
7330
7331
7332
7333
7334
7335
7336
7337
7338
7339
7340
7341
7342
7343
7344
7345
7346
7347
7348
7349
7350
7351
7352
7353
7354
7355
7356
7357
7358
7359
7360
7361
7362
7363
7364
7365
7366
7367
7368
7369
7370
7371
7372
7373
7374
7375
7376
7377
7378
7379
7380
7381
7382
7383
7384
7385
7386
7387
7388
7389
7390
7391
7392
7393
7394
7395
7396
7397
7398
7399
7400
7401
7402
7403
7404
7405
7406
7407
7408
7409
7410
7411
7412
7413
7414
7415
7416
7417
7418
7419
7420
7421
7422
7423
7424
7425
7426
7427
7428
7429
7430
7431
7432
7433
7434
7435
7436
7437
7438
7439
7440
7441
7442
7443
7444
7445
7446
7447
7448
7449
7450
7451
7452
7453
7454
7455
7456
7457
7458
7459
7460
7461
7462
7463
7464
7465
7466
7467
7468
7469
7470
7471
7472
7473
7474
7475
7476
7477
7478
7479
7480
7481
7482
7483
7484
7485
7486
7487
7488
7489
7490
7491
7492
7493
7494
7495
7496
7497
7498
7499
7500
7501
7502
7503
7504
7505
7506
7507
7508
7509
7510
7511
7512
7513
7514
7515
7516
7517
7518
7519
7520
7521
7522
7523
7524
7525
7526
7527
7528
7529
7530
7531
7532
7533
7534
7535
7536
7537
7538
7539
7540
7541
7542
7543
7544
7545
7546
7547
7548
7549
7550
7551
7552
7553
7554
7555
7556
7557
7558
7559
7560
7561
7562
7563
7564
7565
7566
7567
7568
7569
7570
7571
7572
7573
7574
7575
7576
7577
7578
7579
7580
7581
7582
7583
7584
7585
7586
7587
7588
7589
7590
7591
7592
7593
7594
7595
7596
7597
7598
7599
7600
7601
7602
7603
7604
7605
7606
7607
7608
7609
7610
7611
7612
7613
7614
7615
7616
7617
7618
7619
7620
7621
7622
7623
7624
7625
7626
7627
7628
7629
7630
7631
7632
7633
7634
7635
7636
7637
7638
7639
7640
7641
7642
7643
7644
7645
7646
7647
7648
7649
7650
7651
7652
7653
7654
7655
7656
7657
7658
7659
7660
7661
7662
7663
7664
7665
7666
7667
7668
7669
7670
7671
7672
7673
7674
7675
7676
7677
7678
7679
7680
7681
7682
7683
7684
7685
7686
7687
7688
7689
7690
7691
7692
7693
7694
7695
7696
7697
7698
7699
7700
7701
7702
7703
7704
7705
7706
7707
7708
7709
7710
7711
7712
7713
7714
7715
7716
7717
7718
7719
7720
7721
7722
7723
7724
7725
7726
7727
7728
7729
7730
7731
7732
7733
7734
7735
7736
7737
7738
7739
7740
7741
7742
7743
7744
7745
7746
7747
7748
7749
7750
7751
7752
7753
7754
7755
7756
7757
7758
7759
7760
7761
7762
7763
7764
7765
7766
7767
7768
7769
7770
7771
7772
7773
7774
7775
7776
7777
7778
7779
7780
7781
7782
7783
7784
7785
7786
7787
7788
7789
7790
7791
7792
7793
7794
7795
7796
7797
7798
7799
7800
7801
7802
7803
7804
7805
7806
7807
7808
7809
7810
7811
7812
7813
7814
7815
7816
7817
7818
7819
7820
7821
7822
7823
7824
7825
7826
7827
7828
7829
7830
7831
7832
7833
7834
7835
7836
7837
7838
7839
7840
7841
7842
7843
7844
7845
7846
7847
7848
7849
7850
7851
7852
7853
7854
7855
7856
7857
7858
7859
7860
7861
7862
7863
7864
7865
7866
7867
7868
7869
7870
7871
7872
7873
7874
7875
7876
7877
7878
7879
7880
7881
7882
7883
7884
7885
7886
7887
7888
7889
7890
7891
7892
7893
7894
7895
7896
7897
7898
7899
7900
7901
7902
7903
7904
7905
7906
7907
7908
7909
7910
7911
7912
7913
7914
7915
7916
7917
7918
7919
7920
7921
7922
7923
7924
7925
7926
7927
7928
7929
7930
7931
7932
7933
7934
7935
7936
7937
7938
7939
7940
7941
7942
7943
7944
7945
7946
7947
7948
7949
7950
7951
7952
7953
7954
7955
7956
7957
7958
7959
7960
7961
7962
7963
7964
7965
7966
7967
7968
7969
7970
7971
7972
7973
7974
7975
7976
7977
7978
7979
7980
7981
7982
7983
7984
7985
7986
7987
7988
7989
7990
7991
7992
7993
7994
7995
7996
7997
7998
7999
8000
8001
8002
8003
8004
8005
8006
8007
8008
8009
8010
8011
8012
8013
8014
8015
8016
8017
8018
8019
8020
8021
8022
8023
8024
8025
8026
8027
8028
8029
8030
8031
8032
8033
8034
8035
8036
8037
8038
8039
8040
8041
8042
8043
8044
8045
8046
8047
8048
8049
8050
8051
8052
8053
8054
8055
8056
8057
8058
8059
8060
8061
8062
8063
8064
8065
8066
8067
8068
8069
8070
8071
8072
8073
8074
8075
8076
8077
8078
8079
8080
8081
8082
8083
8084
8085
8086
8087
8088
8089
8090
8091
8092
8093
8094
8095
8096
8097
8098
8099
8100
8101
8102
8103
8104
8105
8106
8107
8108
8109
8110
8111
8112
8113
8114
8115
8116
8117
8118
8119
8120
8121
8122
8123
8124
8125
8126
8127
8128
8129
8130
8131
8132
8133
8134
8135
8136
8137
8138
8139
8140
8141
8142
8143
8144
8145
8146
8147
8148
8149
8150
8151
8152
8153
8154
8155
8156
8157
8158
8159
8160
8161
8162
8163
8164
8165
8166
8167
8168
8169
8170
8171
8172
8173
8174
8175
8176
8177
8178
8179
8180
8181
8182
8183
8184
8185
8186
8187
8188
8189
8190
8191
8192
8193
8194
8195
8196
8197
8198
8199
8200
8201
8202
8203
8204
8205
8206
8207
8208
8209
8210
8211
8212
8213
8214
8215
8216
8217
8218
8219
8220
8221
8222
8223
8224
8225
8226
8227
8228
8229
8230
8231
8232
8233
8234
8235
8236
8237
8238
8239
8240
8241
8242
8243
8244
8245
8246
8247
8248
8249
8250
8251
8252
8253
8254
8255
8256
8257
8258
8259
8260
8261
8262
8263
8264
8265
8266
8267
8268
8269
8270
8271
8272
8273
8274
8275
8276
8277
8278
8279
8280
8281
8282
8283
8284
8285
8286
8287
8288
8289
8290
8291
8292
8293
8294
8295
8296
8297
8298
8299
8300
8301
8302
8303
8304
8305
8306
8307
8308
8309
8310
8311
8312
8313
8314
8315
8316
8317
8318
8319
8320
8321
8322
8323
8324
8325
8326
8327
8328
8329
8330
8331
8332
8333
8334
8335
8336
8337
8338
8339
8340
8341
8342
8343
8344
8345
8346
8347
8348
8349
8350
8351
8352
8353
8354
8355
8356
8357
8358
8359
8360
8361
8362
8363
8364
8365
8366
8367
8368
8369
8370
8371
8372
8373
8374
8375
8376
8377
8378
8379
8380
8381
8382
8383
8384
8385
8386
8387
8388
8389
8390
8391
8392
8393
8394
8395
8396
8397
8398
8399
8400
8401
8402
8403
8404
8405
8406
8407
8408
8409
8410
8411
8412
8413
8414
8415
8416
8417
8418
8419
8420
8421
8422
8423
8424
8425
8426
8427
8428
8429
8430
8431
8432
8433
8434
8435
8436
8437
8438
8439
8440
8441
8442
8443
8444
8445
8446
8447
8448
8449
8450
8451
8452
8453
8454
8455
8456
8457
8458
8459
8460
8461
8462
8463
8464
8465
8466
8467
8468
8469
8470
8471
8472
8473
8474
8475
8476
8477
8478
8479
8480
8481
8482
8483
8484
8485
8486
8487
8488
8489
8490
8491
8492
8493
8494
8495
8496
8497
8498
8499
8500
8501
8502
8503
8504
8505
8506
8507
8508
8509
8510
8511
8512
8513
8514
8515
8516
8517
8518
8519
8520
8521
8522
8523
8524
8525
8526
8527
8528
8529
8530
8531
8532
8533
8534
8535
8536
8537
8538
8539
8540
8541
8542
8543
8544
8545
8546
8547
8548
8549
8550
8551
8552
8553
8554
8555
8556
8557
8558
8559
8560
8561
8562
8563
8564
8565
8566
8567
8568
8569
8570
8571
8572
8573
8574
8575
8576
8577
8578
8579
8580
8581
8582
8583
8584
8585
8586
8587
8588
8589
8590
8591
8592
8593
8594
8595
8596
8597
8598
8599
8600
8601
8602
8603
8604
8605
8606
8607
8608
8609
8610
8611
8612
8613
8614
8615
8616
8617
8618
8619
8620
8621
8622
8623
8624
8625
8626
8627
8628
8629
8630
8631
8632
8633
8634
8635
8636
8637
8638
8639
8640
8641
8642
8643
8644
8645
8646
8647
8648
8649
8650
8651
8652
8653
8654
8655
8656
8657
8658
8659
8660
8661
8662
8663
8664
8665
8666
8667
8668
8669
8670
8671
8672
8673
8674
8675
8676
8677
8678
8679
8680
8681
8682
8683
8684
8685
8686
8687
8688
8689
8690
8691
8692
8693
8694
8695
8696
8697
8698
8699
8700
8701
8702
8703
8704
8705
8706
8707
8708
8709
8710
8711
8712
8713
8714
8715
8716
8717
8718
8719
8720
8721
8722
8723
8724
8725
8726
8727
8728
8729
8730
8731
8732
8733
8734
8735
8736
8737
8738
8739
8740
8741
8742
8743
8744
8745
8746
8747
8748
8749
8750
8751
8752
8753
8754
8755
8756
8757
8758
8759
8760
8761
8762
8763
8764
8765
8766
8767
8768
8769
8770
8771
8772
8773
8774
8775
8776
8777
8778
8779
8780
8781
8782
8783
8784
8785
8786
8787
8788
8789
8790
8791
8792
8793
8794
8795
8796
8797
8798
8799
8800
8801
8802
8803
8804
8805
8806
8807
8808
8809
8810
8811
8812
8813
8814
8815
8816
8817
8818
8819
8820
8821
8822
8823
8824
8825
8826
8827
8828
8829
8830
8831
8832
8833
8834
8835
8836
8837
8838
8839
8840
8841
8842
8843
8844
8845
8846
8847
8848
8849
8850
8851
8852
8853
8854
8855
8856
8857
8858
8859
8860
8861
8862
8863
8864
8865
8866
8867
8868
8869
8870
8871
8872
8873
8874
8875
8876
8877
8878
8879
8880
8881
8882
8883
8884
8885
8886
8887
8888
8889
8890
8891
8892
8893
8894
8895
8896
8897
8898
8899
8900
8901
8902
8903
8904
8905
8906
8907
8908
8909
8910
8911
8912
8913
8914
8915
8916
8917
8918
8919
8920
8921
8922
8923
8924
8925
8926
8927
8928
8929
8930
8931
8932
8933
8934
8935
8936
8937
8938
8939
8940
8941
8942
8943
8944
8945
8946
8947
8948
8949
8950
8951
8952
8953
8954
8955
8956
8957
8958
8959
8960
8961
8962
8963
8964
8965
8966
8967
8968
8969
8970
8971
8972
8973
8974
8975
8976
8977
8978
8979
8980
8981
8982
8983
8984
8985
8986
8987
8988
8989
8990
8991
8992
8993
8994
8995
8996
8997
8998
8999
9000
9001
9002
9003
9004
9005
9006
9007
9008
9009
9010
9011
9012
9013
9014
9015
9016
9017
9018
9019
9020
9021
9022
9023
9024
9025
9026
9027
9028
9029
9030
9031
9032
9033
9034
9035
9036
9037
9038
9039
9040
9041
9042
9043
9044
9045
9046
9047
9048
9049
9050
9051
9052
9053
9054
9055
9056
9057
9058
9059
9060
9061
9062
9063
9064
9065
9066
9067
9068
9069
9070
9071
9072
9073
9074
9075
9076
9077
9078
9079
9080
9081
9082
9083
9084
9085
9086
9087
9088
9089
9090
9091
9092
9093
9094
9095
9096
9097
9098
9099
9100
9101
9102
9103
9104
9105
9106
9107
9108
9109
9110
9111
9112
9113
9114
9115
9116
9117
9118
9119
9120
9121
9122
9123
9124
9125
9126
9127
9128
9129
9130
9131
9132
9133
9134
9135
9136
9137
9138
9139
9140
9141
9142
9143
9144
9145
9146
9147
9148
9149
9150
9151
9152
9153
9154
9155
9156
9157
9158
9159
9160
9161
9162
9163
9164
9165
9166
9167
9168
9169
9170
9171
9172
9173
9174
9175
9176
9177
9178
9179
9180
9181
9182
9183
9184
9185
9186
9187
9188
9189
9190
9191
9192
9193
9194
9195
9196
9197
9198
9199
9200
9201
9202
9203
9204
9205
9206
9207
9208
9209
9210
9211
9212
9213
9214
9215
9216
9217
9218
9219
9220
9221
9222
9223
9224
9225
9226
9227
9228
9229
9230
9231
9232
9233
9234
9235
9236
9237
9238
9239
9240
9241
9242
9243
9244
9245
9246
9247
9248
9249
9250
9251
9252
9253
9254
9255
9256
9257
9258
9259
9260
9261
9262
9263
9264
9265
9266
9267
9268
9269
9270
9271
9272
9273
9274
9275
9276
9277
9278
9279
9280
9281
9282
9283
9284
9285
9286
9287
9288
9289
9290
9291
9292
9293
9294
9295
9296
9297
9298
9299
9300
9301
9302
9303
9304
9305
9306
9307
9308
9309
9310
9311
9312
9313
9314
9315
9316
9317
9318
9319
9320
9321
9322
9323
9324
9325
9326
9327
9328
9329
9330
9331
9332
9333
9334
9335
9336
9337
9338
9339
9340
9341
9342
9343
9344
9345
9346
9347
9348
9349
9350
9351
9352
9353
9354
9355
9356
9357
9358
9359
9360
9361
9362
9363
9364
9365
9366
9367
9368
9369
9370
9371
9372
9373
9374
9375
9376
9377
9378
9379
9380
9381
9382
9383
9384
9385
9386
9387
9388
9389
9390
9391
9392
9393
9394
9395
9396
9397
9398
9399
9400
9401
9402
9403
9404
9405
9406
9407
9408
9409
9410
9411
9412
9413
9414
9415
9416
9417
9418
9419
9420
9421
9422
9423
9424
9425
9426
9427
9428
9429
9430
9431
9432
9433
9434
9435
9436
9437
9438
9439
9440
9441
9442
9443
9444
9445
9446
9447
9448
9449
9450
9451
9452
9453
9454
9455
9456
9457
9458
9459
9460
9461
9462
9463
9464
9465
9466
9467
9468
9469
9470
9471
9472
9473
9474
9475
9476
9477
9478
9479
9480
9481
9482
9483
9484
9485
9486
9487
9488
9489
9490
9491
9492
9493
9494
9495
9496
9497
9498
9499
9500
9501
9502
9503
9504
9505
9506
9507
9508
9509
9510
9511
9512
9513
9514
9515
9516
9517
9518
9519
9520
9521
9522
9523
9524
9525
9526
9527
9528
9529
9530
9531
9532
9533
9534
9535
9536
9537
9538
9539
9540
9541
9542
9543
9544
9545
9546
9547
9548
9549
9550
9551
9552
9553
9554
9555
9556
9557
9558
9559
9560
9561
9562
9563
9564
9565
9566
9567
9568
9569
9570
9571
9572
9573
9574
9575
9576
9577
9578
9579
9580
9581
9582
9583
9584
9585
9586
9587
9588
9589
9590
9591
9592
9593
9594
9595
9596
9597
9598
9599
9600
9601
9602
9603
9604
9605
9606
9607
9608
9609
9610
9611
9612
9613
9614
9615
9616
9617
9618
9619
9620
9621
9622
9623
9624
9625
9626
9627
9628
9629
9630
9631
9632
9633
9634
9635
9636
9637
9638
9639
9640
9641
9642
9643
9644
9645
9646
9647
9648
9649
9650
9651
9652
9653
9654
9655
9656
9657
9658
9659
9660
9661
9662
9663
9664
9665
9666
9667
9668
9669
9670
9671
9672
9673
9674
9675
9676
9677
9678
9679
9680
9681
9682
9683
9684
9685
9686
9687
9688
9689
9690
9691
9692
9693
9694
9695
9696
9697
9698
9699
9700
9701
9702
9703
9704
9705
9706
9707
9708
9709
9710
9711
9712
9713
9714
9715
9716
9717
9718
9719
9720
9721
9722
9723
9724
9725
9726
9727
9728
9729
9730
9731
9732
9733
9734
9735
9736
9737
9738
9739
9740
9741
9742
9743
9744
9745
9746
9747
9748
9749
9750
9751
9752
9753
9754
9755
9756
9757
9758
9759
9760
9761
9762
9763
9764
9765
9766
9767
9768
9769
9770
9771
9772
9773
9774
9775
9776
9777
9778
9779
9780
9781
9782
9783
9784
9785
9786
9787
9788
9789
9790
9791
9792
9793
9794
9795
9796
9797
9798
9799
9800
9801
9802
9803
9804
9805
9806
9807
9808
9809
9810
9811
9812
9813
9814
9815
9816
9817
9818
9819
9820
9821
9822
9823
9824
9825
9826
9827
9828
9829
9830
9831
9832
9833
9834
9835
9836
9837
9838
9839
9840
9841
9842
9843
9844
9845
9846
9847
9848
9849
9850
9851
9852
9853
9854
9855
9856
9857
9858
9859
9860
9861
9862
9863
9864
9865
9866
9867
9868
9869
9870
9871
9872
9873
9874
9875
9876
9877
9878
9879
9880
9881
9882
9883
9884
9885
9886
9887
9888
9889
9890
9891
9892
9893
9894
9895
9896
9897
9898
9899
9900
9901
9902
9903
9904
9905
9906
9907
9908
9909
9910
9911
9912
9913
9914
9915
9916
9917
9918
9919
9920
9921
9922
9923
9924
9925
9926
9927
9928
9929
9930
9931
9932
9933
9934
9935
9936
9937
9938
9939
9940
9941
9942
9943
9944
9945
9946
9947
9948
9949
9950
9951
9952
9953
9954
9955
9956
9957
9958
9959
9960
9961
9962
9963
9964
9965
9966
9967
9968
9969
9970
9971
9972
9973
9974
9975
9976
9977
9978
9979
9980
9981
9982
9983
9984
9985
9986
9987
9988
9989
9990
9991
9992
9993
9994
9995
9996
9997
9998
9999
10000
10001
10002
10003
10004
10005
10006
10007
10008
10009
10010
10011
10012
10013
10014
10015
10016
10017
10018
10019
10020
10021
10022
10023
10024
10025
10026
10027
10028
10029
10030
10031
10032
10033
10034
10035
10036
10037
10038
10039
10040
10041
10042
10043
10044
10045
10046
10047
10048
10049
10050
10051
10052
10053
10054
10055
10056
10057
10058
10059
10060
10061
10062
10063
10064
10065
10066
10067
10068
10069
10070
10071
10072
10073
10074
10075
10076
10077
10078
10079
10080
10081
10082
10083
10084
10085
10086
10087
10088
10089
10090
10091
10092
10093
10094
10095
10096
10097
10098
10099
10100
10101
10102
10103
10104
10105
10106
10107
10108
10109
10110
10111
10112
10113
10114
10115
10116
10117
10118
10119
10120
10121
10122
10123
10124
10125
10126
10127
10128
10129
10130
10131
10132
10133
10134
10135
10136
10137
10138
10139
10140
10141
10142
10143
10144
10145
10146
10147
10148
10149
10150
10151
10152
10153
10154
10155
10156
10157
10158
10159
10160
10161
10162
10163
10164
10165
10166
10167
10168
10169
10170
10171
10172
10173
10174
10175
10176
10177
10178
10179
10180
10181
10182
10183
10184
10185
10186
10187
10188
10189
10190
10191
10192
10193
10194
10195
10196
10197
10198
10199
10200
10201
10202
10203
10204
10205
10206
10207
10208
10209
10210
10211
10212
10213
10214
10215
10216
10217
10218
10219
10220
10221
10222
10223
10224
10225
10226
10227
10228
10229
10230
10231
10232
10233
10234
10235
10236
10237
10238
10239
10240
10241
10242
10243
10244
10245
10246
10247
10248
10249
10250
10251
10252
10253
10254
10255
10256
10257
10258
10259
10260
10261
10262
10263
10264
10265
10266
10267
10268
10269
10270
10271
10272
10273
10274
10275
10276
10277
10278
10279
10280
10281
10282
10283
10284
10285
10286
10287
10288
10289
10290
10291
10292
10293
10294
10295
10296
10297
10298
10299
10300
10301
10302
10303
10304
10305
10306
10307
10308
10309
10310
10311
10312
10313
10314
10315
10316
10317
10318
10319
10320
10321
10322
10323
10324
10325
10326
10327
10328
10329
10330
10331
10332
10333
10334
10335
10336
10337
10338
10339
10340
10341
10342
10343
10344
10345
10346
10347
10348
10349
10350
10351
10352
10353
10354
10355
10356
10357
10358
10359
10360
10361
10362
10363
10364
10365
10366
10367
10368
10369
10370
10371
10372
10373
10374
10375
10376
10377
10378
10379
10380
10381
10382
10383
10384
10385
10386
10387
10388
10389
10390
10391
10392
10393
10394
10395
10396
10397
10398
10399
10400
10401
10402
10403
10404
10405
10406
10407
10408
10409
10410
10411
10412
10413
10414
10415
10416
10417
10418
10419
10420
10421
10422
10423
10424
10425
10426
10427
10428
10429
10430
10431
10432
10433
10434
10435
10436
10437
10438
10439
10440
10441
10442
10443
10444
10445
10446
10447
10448
10449
10450
10451
10452
10453
10454
10455
10456
10457
10458
10459
10460
10461
10462
10463
10464
10465
10466
10467
10468
10469
10470
10471
10472
10473
10474
10475
10476
10477
10478
10479
10480
10481
10482
10483
10484
10485
10486
10487
10488
10489
10490
10491
10492
10493
10494
10495
10496
10497
10498
10499
10500
10501
10502
10503
10504
10505
10506
10507
10508
10509
10510
10511
10512
10513
10514
10515
10516
10517
10518
10519
10520
10521
10522
10523
10524
10525
10526
10527
10528
10529
10530
10531
10532
10533
10534
10535
10536
10537
10538
10539
10540
10541
10542
10543
10544
10545
10546
10547
10548
10549
10550
10551
10552
10553
10554
10555
10556
10557
10558
10559
10560
10561
10562
10563
10564
10565
10566
10567
10568
10569
10570
10571
10572
10573
10574
10575
10576
10577
10578
10579
10580
10581
10582
10583
10584
10585
10586
10587
10588
10589
10590
10591
10592
10593
10594
10595
10596
10597
10598
10599
10600
10601
10602
10603
10604
10605
10606
10607
10608
10609
10610
10611
10612
10613
10614
10615
10616
10617
10618
10619
10620
10621
------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                             S E M _ P R A G                              --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--          Copyright (C) 1992-2004, Free Software Foundation, Inc.         --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 2,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
-- for  more details.  You should have  received  a copy of the GNU General --
-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
-- MA 02111-1307, USA.                                                      --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

--  This unit contains the semantic processing for all pragmas, both language
--  and implementation defined. For most pragmas, the parser only does the
--  most basic job of checking the syntax, so Sem_Prag also contains the code
--  to complete the syntax checks. Certain pragmas are handled partially or
--  completely by the parser (see Par.Prag for further details).

with Atree;    use Atree;
with Casing;   use Casing;
with Csets;    use Csets;
with Debug;    use Debug;
with Einfo;    use Einfo;
with Elists;   use Elists;
with Errout;   use Errout;
with Expander; use Expander;
with Exp_Dist; use Exp_Dist;
with Fname;    use Fname;
with Hostparm; use Hostparm;
with Lib;      use Lib;
with Lib.Writ; use Lib.Writ;
with Lib.Xref; use Lib.Xref;
with Namet;    use Namet;
with Nlists;   use Nlists;
with Nmake;    use Nmake;
with Opt;      use Opt;
with Output;   use Output;
with Restrict; use Restrict;
with Rident;   use Rident;
with Rtsfind;  use Rtsfind;
with Sem;      use Sem;
with Sem_Ch3;  use Sem_Ch3;
with Sem_Ch8;  use Sem_Ch8;
with Sem_Ch13; use Sem_Ch13;
with Sem_Disp; use Sem_Disp;
with Sem_Elim; use Sem_Elim;
with Sem_Eval; use Sem_Eval;
with Sem_Intr; use Sem_Intr;
with Sem_Mech; use Sem_Mech;
with Sem_Res;  use Sem_Res;
with Sem_Type; use Sem_Type;
with Sem_Util; use Sem_Util;
with Sem_VFpt; use Sem_VFpt;
with Stand;    use Stand;
with Sinfo;    use Sinfo;
with Sinfo.CN; use Sinfo.CN;
with Sinput;   use Sinput;
with Snames;   use Snames;
with Stringt;  use Stringt;
with Stylesw;  use Stylesw;
with Targparm; use Targparm;
with Tbuild;   use Tbuild;
with Ttypes;
with Uintp;    use Uintp;
with Urealp;   use Urealp;
with Validsw;  use Validsw;

with GNAT.Spelling_Checker; use GNAT.Spelling_Checker;

package body Sem_Prag is

   ----------------------------------------------
   -- Common Handling of Import-Export Pragmas --
   ----------------------------------------------

   --  In the following section, a number of Import_xxx and Export_xxx
   --  pragmas are defined by GNAT. These are compatible with the DEC
   --  pragmas of the same name, and all have the following common
   --  form and processing:

   --  pragma Export_xxx
   --        [Internal                 =>] LOCAL_NAME,
   --     [, [External                 =>] EXTERNAL_SYMBOL]
   --     [, other optional parameters   ]);

   --  pragma Import_xxx
   --        [Internal                 =>] LOCAL_NAME,
   --     [, [External                 =>] EXTERNAL_SYMBOL]
   --     [, other optional parameters   ]);

   --   EXTERNAL_SYMBOL ::=
   --     IDENTIFIER
   --   | static_string_EXPRESSION

   --  The internal LOCAL_NAME designates the entity that is imported or
   --  exported, and must refer to an entity in the current declarative
   --  part (as required by the rules for LOCAL_NAME).

   --  The external linker name is designated by the External parameter
   --  if given, or the Internal parameter if not (if there is no External
   --  parameter, the External parameter is a copy of the Internal name).

   --  If the External parameter is given as a string, then this string
   --  is treated as an external name (exactly as though it had been given
   --  as an External_Name parameter for a normal Import pragma).

   --  If the External parameter is given as an identifier (or there is no
   --  External parameter, so that the Internal identifier is used), then
   --  the external name is the characters of the identifier, translated
   --  to all upper case letters for OpenVMS versions of GNAT, and to all
   --  lower case letters for all other versions

   --  Note: the external name specified or implied by any of these special
   --  Import_xxx or Export_xxx pragmas override an external or link name
   --  specified in a previous Import or Export pragma.

   --  Note: these and all other DEC-compatible GNAT pragmas allow full
   --  use of named notation, following the standard rules for subprogram
   --  calls, i.e. parameters can be given in any order if named notation
   --  is used, and positional and named notation can be mixed, subject to
   --  the rule that all positional parameters must appear first.

   --  Note: All these pragmas are implemented exactly following the DEC
   --  design and implementation and are intended to be fully compatible
   --  with the use of these pragmas in the DEC Ada compiler.

   -------------------------------------
   -- Local Subprograms and Variables --
   -------------------------------------

   function Adjust_External_Name_Case (N : Node_Id) return Node_Id;
   --  This routine is used for possible casing adjustment of an explicit
   --  external name supplied as a string literal (the node N), according
   --  to the casing requirement of Opt.External_Name_Casing. If this is
   --  set to As_Is, then the string literal is returned unchanged, but if
   --  it is set to Uppercase or Lowercase, then a new string literal with
   --  appropriate casing is constructed.

   function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id;
   --  If Def_Id refers to a renamed subprogram, then the base subprogram
   --  (the original one, following the renaming chain) is returned.
   --  Otherwise the entity is returned unchanged. Should be in Einfo???

   procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id);
   --  Place semantic information on the argument of an Elaborate or
   --  Elaborate_All pragma. Entity name for unit and its parents is
   --  taken from item in previous with_clause that mentions the unit.

   -------------------------------
   -- Adjust_External_Name_Case --
   -------------------------------

   function Adjust_External_Name_Case (N : Node_Id) return Node_Id is
      CC : Char_Code;

   begin
      --  Adjust case of literal if required

      if Opt.External_Name_Exp_Casing = As_Is then
         return N;

      else
         --  Copy existing string

         Start_String;

         --  Set proper casing

         for J in 1 .. String_Length (Strval (N)) loop
            CC := Get_String_Char (Strval (N), J);

            if Opt.External_Name_Exp_Casing = Uppercase
              and then CC >= Get_Char_Code ('a')
              and then CC <= Get_Char_Code ('z')
            then
               Store_String_Char (CC - 32);

            elsif Opt.External_Name_Exp_Casing = Lowercase
              and then CC >= Get_Char_Code ('A')
              and then CC <= Get_Char_Code ('Z')
            then
               Store_String_Char (CC + 32);

            else
               Store_String_Char (CC);
            end if;
         end loop;

         return
           Make_String_Literal (Sloc (N),
             Strval => End_String);
      end if;
   end Adjust_External_Name_Case;

   --------------------
   -- Analyze_Pragma --
   --------------------

   procedure Analyze_Pragma (N : Node_Id) is
      Loc     : constant Source_Ptr := Sloc (N);
      Prag_Id : Pragma_Id;

      Pragma_Exit : exception;
      --  This exception is used to exit pragma processing completely. It
      --  is used when an error is detected, and in other situations where
      --  it is known that no further processing is required.

      Arg_Count : Nat;
      --  Number of pragma argument associations

      Arg1 : Node_Id;
      Arg2 : Node_Id;
      Arg3 : Node_Id;
      Arg4 : Node_Id;
      --  First four pragma arguments (pragma argument association nodes,
      --  or Empty if the corresponding argument does not exist).

      procedure Check_Ada_83_Warning;
      --  Issues a warning message for the current pragma if operating in Ada
      --  83 mode (used for language pragmas that are not a standard part of
      --  Ada 83). This procedure does not raise Error_Pragma. Also notes use
      --  of 95 pragma.

      procedure Check_Arg_Count (Required : Nat);
      --  Check argument count for pragma is equal to given parameter.
      --  If not, then issue an error message and raise Pragma_Exit.

      --  Note: all routines whose name is Check_Arg_Is_xxx take an
      --  argument Arg which can either be a pragma argument association,
      --  in which case the check is applied to the expression of the
      --  association or an expression directly.

      procedure Check_Arg_Is_External_Name (Arg : Node_Id);
      --  Check that an argument has the right form for an EXTERNAL_NAME
      --  parameter of an extended import/export pragma. The rule is that
      --  the name must be an identifier or string literal (in Ada 83 mode)
      --  or a static string expression (in Ada 95 mode).

      procedure Check_Arg_Is_Identifier (Arg : Node_Id);
      --  Check the specified argument Arg to make sure that it is an
      --  identifier. If not give error and raise Pragma_Exit.

      procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id);
      --  Check the specified argument Arg to make sure that it is an
      --  integer literal. If not give error and raise Pragma_Exit.

      procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id);
      --  Check the specified argument Arg to make sure that it has the
      --  proper syntactic form for a local name and meets the semantic
      --  requirements for a local name. The local name is analyzed as
      --  part of the processing for this call. In addition, the local
      --  name is required to represent an entity at the library level.

      procedure Check_Arg_Is_Local_Name (Arg : Node_Id);
      --  Check the specified argument Arg to make sure that it has the
      --  proper syntactic form for a local name and meets the semantic
      --  requirements for a local name. The local name is analyzed as
      --  part of the processing for this call.

      procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id);
      --  Check the specified argument Arg to make sure that it is a valid
      --  locking policy name. If not give error and raise Pragma_Exit.

      procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
      procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id);
      --  Check the specified argument Arg to make sure that it is an
      --  identifier whose name matches either N1 or N2 (or N3 if present).
      --  If not then give error and raise Pragma_Exit.

      procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id);
      --  Check the specified argument Arg to make sure that it is a valid
      --  queuing policy name. If not give error and raise Pragma_Exit.

      procedure Check_Arg_Is_Static_Expression
        (Arg : Node_Id;
         Typ : Entity_Id);
      --  Check the specified argument Arg to make sure that it is a static
      --  expression of the given type (i.e. it will be analyzed and resolved
      --  using this type, which can be any valid argument to Resolve, e.g.
      --  Any_Integer is OK). If not, given error and raise Pragma_Exit.

      procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
      --  Check the specified argument Arg to make sure that it is a
      --  string literal. If not give error and raise Pragma_Exit

      procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id);
      --  Check the specified argument Arg to make sure that it is a valid
      --  valid task dispatching policy name. If not give error and raise
      --  Pragma_Exit.

      procedure Check_At_Least_N_Arguments (N : Nat);
      --  Check there are at least N arguments present

      procedure Check_At_Most_N_Arguments (N : Nat);
      --  Check there are no more than N arguments present

      procedure Check_First_Subtype (Arg : Node_Id);
      --  Checks that Arg, whose expression is an entity name referencing
      --  a subtype, does not reference a type that is not a first subtype.

      procedure Check_In_Main_Program;
      --  Common checks for pragmas that appear within a main program
      --  (Priority, Main_Storage, Time_Slice).

      procedure Check_Interrupt_Or_Attach_Handler;
      --  Common processing for first argument of pragma Interrupt_Handler
      --  or pragma Attach_Handler.

      procedure Check_Is_In_Decl_Part_Or_Package_Spec;
      --  Check that pragma appears in a declarative part, or in a package
      --  specification, i.e. that it does not occur in a statement sequence
      --  in a body.

      procedure Check_No_Identifier (Arg : Node_Id);
      --  Checks that the given argument does not have an identifier. If
      --  an identifier is present, then an error message is issued, and
      --  Pragma_Exit is raised.

      procedure Check_No_Identifiers;
      --  Checks that none of the arguments to the pragma has an identifier.
      --  If any argument has an identifier, then an error message is issued,
      --  and Pragma_Exit is raised.

      procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
      --  Checks if the given argument has an identifier, and if so, requires
      --  it to match the given identifier name. If there is a non-matching
      --  identifier, then an error message is given and Error_Pragmas raised.

      procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
      --  Checks if the given argument has an identifier, and if so, requires
      --  it to match the given identifier name. If there is a non-matching
      --  identifier, then an error message is given and Error_Pragmas raised.
      --  In this version of the procedure, the identifier name is given as
      --  a string with lower case letters.

      procedure Check_Static_Constraint (Constr : Node_Id);
      --  Constr is a constraint from an N_Subtype_Indication node from a
      --  component constraint in an Unchecked_Union type. This routine checks
      --  that the constraint is static as required by the restrictions for
      --  Unchecked_Union.

      procedure Check_Valid_Configuration_Pragma;
      --  Legality checks for placement of a configuration pragma

      procedure Check_Valid_Library_Unit_Pragma;
      --  Legality checks for library unit pragmas. A special case arises for
      --  pragmas in generic instances that come from copies of the original
      --  library unit pragmas in the generic templates. In the case of other
      --  than library level instantiations these can appear in contexts which
      --  would normally be invalid (they only apply to the original template
      --  and to library level instantiations), and they are simply ignored,
      --  which is implemented by rewriting them as null statements.

      procedure Error_Pragma (Msg : String);
      pragma No_Return (Error_Pragma);
      --  Outputs error message for current pragma. The message contains an %
      --  that will be replaced with the pragma name, and the flag is placed
      --  on the pragma itself. Pragma_Exit is then raised.

      procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id);
      pragma No_Return (Error_Pragma_Arg);
      --  Outputs error message for current pragma. The message may contain
      --  a % that will be replaced with the pragma name. The parameter Arg
      --  may either be a pragma argument association, in which case the flag
      --  is placed on the expression of this association, or an expression,
      --  in which case the flag is placed directly on the expression. The
      --  message is placed using Error_Msg_N, so the message may also contain
      --  an & insertion character which will reference the given Arg value.
      --  After placing the message, Pragma_Exit is raised.

      procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id);
      pragma No_Return (Error_Pragma_Arg);
      --  Similar to above form of Error_Pragma_Arg except that two messages
      --  are provided, the second is a continuation comment starting with \.

      procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id);
      pragma No_Return (Error_Pragma_Arg_Ident);
      --  Outputs error message for current pragma. The message may contain
      --  a % that will be replaced with the pragma name. The parameter Arg
      --  must be a pragma argument association with a non-empty identifier
      --  (i.e. its Chars field must be set), and the error message is placed
      --  on the identifier. The message is placed using Error_Msg_N so
      --  the message may also contain an & insertion character which will
      --  reference the identifier. After placing the message, Pragma_Exit
      --  is raised.

      function Find_Lib_Unit_Name return Entity_Id;
      --  Used for a library unit pragma to find the entity to which the
      --  library unit pragma applies, returns the entity found.

      procedure Find_Program_Unit_Name (Id : Node_Id);
      --  If the pragma is a compilation unit pragma, the id must denote the
      --  compilation unit in the same compilation, and the pragma must appear
      --  in the list of preceding or trailing pragmas. If it is a program
      --  unit pragma that is not a compilation unit pragma, then the
      --  identifier must be visible.

      type Name_List is array (Natural range <>) of Name_Id;
      type Args_List is array (Natural range <>) of Node_Id;
      procedure Gather_Associations
        (Names : Name_List;
         Args  : out Args_List);
      --  This procedure is used to gather the arguments for a pragma that
      --  permits arbitrary ordering of parameters using the normal rules
      --  for named and positional parameters. The Names argument is a list
      --  of Name_Id values that corresponds to the allowed pragma argument
      --  association identifiers in order. The result returned in Args is
      --  a list of corresponding expressions that are the pragma arguments.
      --  Note that this is a list of expressions, not of pragma argument
      --  associations (Gather_Associations has completely checked all the
      --  optional identifiers when it returns). An entry in Args is Empty
      --  on return if the corresponding argument is not present.

      function Get_Pragma_Arg (Arg : Node_Id) return Node_Id;
      --  All the routines that check pragma arguments take either a pragma
      --  argument association (in which case the expression of the argument
      --  association is checked), or the expression directly. The function
      --  Get_Pragma_Arg is a utility used to deal with these two cases. If
      --  Arg is a pragma argument association node, then its expression is
      --  returned, otherwise Arg is returned unchanged.

      procedure GNAT_Pragma;
      --  Called for all GNAT defined pragmas to note the use of the feature,
      --  and also check the relevant restriction (No_Implementation_Pragmas).

      function Is_Before_First_Decl
        (Pragma_Node : Node_Id;
         Decls       : List_Id) return Boolean;
      --  Return True if Pragma_Node is before the first declarative item in
      --  Decls where Decls is the list of declarative items.

      function Is_Configuration_Pragma return Boolean;
      --  Deterermines if the placement of the current pragma is appropriate
      --  for a configuration pragma (precedes the current compilation unit)

      procedure Pragma_Misplaced;
      --  Issue fatal error message for misplaced pragma

      procedure Process_Atomic_Shared_Volatile;
      --  Common processing for pragmas Atomic, Shared, Volatile. Note that
      --  Shared is an obsolete Ada 83 pragma, treated as being identical
      --  in effect to pragma Atomic.

      procedure Process_Convention (C : out Convention_Id; E : out Entity_Id);
      --  Common procesing for Convention, Interface, Import and Export.
      --  Checks first two arguments of pragma, and sets the appropriate
      --  convention value in the specified entity or entities. On return
      --  C is the convention, E is the referenced entity.

      procedure Process_Extended_Import_Export_Exception_Pragma
        (Arg_Internal : Node_Id;
         Arg_External : Node_Id;
         Arg_Form     : Node_Id;
         Arg_Code     : Node_Id);
      --  Common processing for the pragmas Import/Export_Exception.
      --  The three arguments correspond to the three named parameters of
      --  the pragma. An argument is empty if the corresponding parameter
      --  is not present in the pragma.

      procedure Process_Extended_Import_Export_Object_Pragma
        (Arg_Internal : Node_Id;
         Arg_External : Node_Id;
         Arg_Size     : Node_Id);
      --  Common processing for the pragmass Import/Export_Object.
      --  The three arguments correspond to the three named parameters
      --  of the pragmas. An argument is empty if the corresponding
      --  parameter is not present in the pragma.

      procedure Process_Extended_Import_Export_Internal_Arg
        (Arg_Internal : Node_Id := Empty);
      --  Common processing for all extended Import and Export pragmas. The
      --  argument is the pragma parameter for the Internal argument. If
      --  Arg_Internal is empty or inappropriate, an error message is posted.
      --  Otherwise, on normal return, the Entity_Field of Arg_Internal is
      --  set to identify the referenced entity.

      procedure Process_Extended_Import_Export_Subprogram_Pragma
        (Arg_Internal                 : Node_Id;
         Arg_External                 : Node_Id;
         Arg_Parameter_Types          : Node_Id;
         Arg_Result_Type              : Node_Id := Empty;
         Arg_Mechanism                : Node_Id;
         Arg_Result_Mechanism         : Node_Id := Empty;
         Arg_First_Optional_Parameter : Node_Id := Empty);
      --  Common processing for all extended Import and Export pragmas
      --  applying to subprograms. The caller omits any arguments that do
      --  bnot apply to the pragma in question (for example, Arg_Result_Type
      --  can be non-Empty only in the Import_Function and Export_Function
      --  cases). The argument names correspond to the allowed pragma
      --  association identifiers.

      procedure Process_Generic_List;
      --  Common processing for Share_Generic and Inline_Generic

      procedure Process_Import_Or_Interface;
      --  Common processing for Import of Interface

      procedure Process_Inline (Active : Boolean);
      --  Common processing for Inline and Inline_Always. The parameter
      --  indicates if the inline pragma is active, i.e. if it should
      --  actually cause inlining to occur.

      procedure Process_Interface_Name
        (Subprogram_Def : Entity_Id;
         Ext_Arg        : Node_Id;
         Link_Arg       : Node_Id);
      --  Given the last two arguments of pragma Import, pragma Export, or
      --  pragma Interface_Name, performs validity checks and sets the
      --  Interface_Name field of the given subprogram entity to the
      --  appropriate external or link name, depending on the arguments
      --  given. Ext_Arg is always present, but Link_Arg may be missing.
      --  Note that Ext_Arg may represent the Link_Name if Link_Arg is
      --  missing, and appropriate named notation is used for Ext_Arg.
      --  If neither Ext_Arg nor Link_Arg is present, the interface name
      --  is set to the default from the subprogram name.

      procedure Process_Interrupt_Or_Attach_Handler;
      --  Common processing for Interrupt and Attach_Handler pragmas

      procedure Process_Restrictions_Or_Restriction_Warnings;
      --  Common processing for Restrictions and Restriction_Warnings pragmas

      procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean);
      --  Common processing for Suppress and Unsuppress. The boolean parameter
      --  Suppress_Case is True for the Suppress case, and False for the
      --  Unsuppress case.

      procedure Set_Exported (E : Entity_Id; Arg : Node_Id);
      --  This procedure sets the Is_Exported flag for the given entity,
      --  checking that the entity was not previously imported. Arg is
      --  the argument that specified the entity. A check is also made
      --  for exporting inappropriate entities.

      procedure Set_Extended_Import_Export_External_Name
        (Internal_Ent : Entity_Id;
         Arg_External : Node_Id);
      --  Common processing for all extended import export pragmas. The first
      --  argument, Internal_Ent, is the internal entity, which has already
      --  been checked for validity by the caller. Arg_External is from the
      --  Import or Export pragma, and may be null if no External parameter
      --  was present. If Arg_External is present and is a non-null string
      --  (a null string is treated as the default), then the Interface_Name
      --  field of Internal_Ent is set appropriately.

      procedure Set_Imported (E : Entity_Id);
      --  This procedure sets the Is_Imported flag for the given entity,
      --  checking that it is not previously exported or imported.

      procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
      --  Mech is a parameter passing mechanism (see Import_Function syntax
      --  for MECHANISM_NAME). This routine checks that the mechanism argument
      --  has the right form, and if not issues an error message. If the
      --  argument has the right form then the Mechanism field of Ent is
      --  set appropriately.

      procedure Set_Ravenscar_Profile (N : Node_Id);
      --  Activate the set of configuration pragmas and restrictions that
      --  make up the Ravenscar Profile. N is the corresponding pragma
      --  node, which is used for error messages on any constructs
      --  that violate the profile.

      --------------------------
      -- Check_Ada_83_Warning --
      --------------------------

      procedure Check_Ada_83_Warning is
      begin
         if Ada_Version = Ada_83 and then Comes_From_Source (N) then
            Error_Msg_N ("(Ada 83) pragma& is non-standard?", N);
         end if;
      end Check_Ada_83_Warning;

      ---------------------
      -- Check_Arg_Count --
      ---------------------

      procedure Check_Arg_Count (Required : Nat) is
      begin
         if Arg_Count /= Required then
            Error_Pragma ("wrong number of arguments for pragma%");
         end if;
      end Check_Arg_Count;

      --------------------------------
      -- Check_Arg_Is_External_Name --
      --------------------------------

      procedure Check_Arg_Is_External_Name (Arg : Node_Id) is
         Argx : constant Node_Id := Get_Pragma_Arg (Arg);

      begin
         if Nkind (Argx) = N_Identifier then
            return;

         else
            Analyze_And_Resolve (Argx, Standard_String);

            if Is_OK_Static_Expression (Argx) then
               return;

            elsif Etype (Argx) = Any_Type then
               raise Pragma_Exit;

            --  An interesting special case, if we have a string literal and
            --  we are in Ada 83 mode, then we allow it even though it will
            --  not be flagged as static. This allows expected Ada 83 mode
            --  use of external names which are string literals, even though
            --  technically these are not static in Ada 83.

            elsif Ada_Version = Ada_83
              and then Nkind (Argx) = N_String_Literal
            then
               return;

            --  Static expression that raises Constraint_Error. This has
            --  already been flagged, so just exit from pragma processing.

            elsif Is_Static_Expression (Argx) then
               raise Pragma_Exit;

            --  Here we have a real error (non-static expression)

            else
               Error_Msg_Name_1 := Chars (N);
               Flag_Non_Static_Expr
                 ("argument for pragma% must be a identifier or " &
                  "static string expression!", Argx);
               raise Pragma_Exit;
            end if;
         end if;
      end Check_Arg_Is_External_Name;

      -----------------------------
      -- Check_Arg_Is_Identifier --
      -----------------------------

      procedure Check_Arg_Is_Identifier (Arg : Node_Id) is
         Argx : constant Node_Id := Get_Pragma_Arg (Arg);
      begin
         if Nkind (Argx) /= N_Identifier then
            Error_Pragma_Arg
              ("argument for pragma% must be identifier", Argx);
         end if;
      end Check_Arg_Is_Identifier;

      ----------------------------------
      -- Check_Arg_Is_Integer_Literal --
      ----------------------------------

      procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is
         Argx : constant Node_Id := Get_Pragma_Arg (Arg);
      begin
         if Nkind (Argx) /= N_Integer_Literal then
            Error_Pragma_Arg
              ("argument for pragma% must be integer literal", Argx);
         end if;
      end Check_Arg_Is_Integer_Literal;

      -------------------------------------------
      -- Check_Arg_Is_Library_Level_Local_Name --
      -------------------------------------------

      --  LOCAL_NAME ::=
      --    DIRECT_NAME
      --  | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
      --  | library_unit_NAME

      procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is
      begin
         Check_Arg_Is_Local_Name (Arg);

         if not Is_Library_Level_Entity (Entity (Expression (Arg)))
           and then Comes_From_Source (N)
         then
            Error_Pragma_Arg
              ("argument for pragma% must be library level entity", Arg);
         end if;
      end Check_Arg_Is_Library_Level_Local_Name;

      -----------------------------
      -- Check_Arg_Is_Local_Name --
      -----------------------------

      --  LOCAL_NAME ::=
      --    DIRECT_NAME
      --  | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
      --  | library_unit_NAME

      procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is
         Argx : constant Node_Id := Get_Pragma_Arg (Arg);

      begin
         Analyze (Argx);

         if Nkind (Argx) not in N_Direct_Name
           and then (Nkind (Argx) /= N_Attribute_Reference
                      or else Present (Expressions (Argx))
                      or else Nkind (Prefix (Argx)) /= N_Identifier)
           and then (not Is_Entity_Name (Argx)
                      or else not Is_Compilation_Unit (Entity (Argx)))
         then
            Error_Pragma_Arg ("argument for pragma% must be local name", Argx);
         end if;

         if Is_Entity_Name (Argx)
           and then Scope (Entity (Argx)) /= Current_Scope
         then
            Error_Pragma_Arg
              ("pragma% argument must be in same declarative part", Arg);
         end if;
      end Check_Arg_Is_Local_Name;

      ---------------------------------
      -- Check_Arg_Is_Locking_Policy --
      ---------------------------------

      procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is
         Argx : constant Node_Id := Get_Pragma_Arg (Arg);

      begin
         Check_Arg_Is_Identifier (Argx);

         if not Is_Locking_Policy_Name (Chars (Argx)) then
            Error_Pragma_Arg
              ("& is not a valid locking policy name", Argx);
         end if;
      end Check_Arg_Is_Locking_Policy;

      -------------------------
      -- Check_Arg_Is_One_Of --
      -------------------------

      procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
         Argx : constant Node_Id := Get_Pragma_Arg (Arg);

      begin
         Check_Arg_Is_Identifier (Argx);

         if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then
            Error_Msg_Name_2 := N1;
            Error_Msg_Name_3 := N2;
            Error_Pragma_Arg ("argument for pragma% must be% or%", Argx);
         end if;
      end Check_Arg_Is_One_Of;

      procedure Check_Arg_Is_One_Of
        (Arg        : Node_Id;
         N1, N2, N3 : Name_Id)
      is
         Argx : constant Node_Id := Get_Pragma_Arg (Arg);

      begin
         Check_Arg_Is_Identifier (Argx);

         if Chars (Argx) /= N1
           and then Chars (Argx) /= N2
           and then Chars (Argx) /= N3
         then
            Error_Pragma_Arg ("invalid argument for pragma%", Argx);
         end if;
      end Check_Arg_Is_One_Of;

      ---------------------------------
      -- Check_Arg_Is_Queuing_Policy --
      ---------------------------------

      procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is
         Argx : constant Node_Id := Get_Pragma_Arg (Arg);

      begin
         Check_Arg_Is_Identifier (Argx);

         if not Is_Queuing_Policy_Name (Chars (Argx)) then
            Error_Pragma_Arg
              ("& is not a valid queuing policy name", Argx);
         end if;
      end Check_Arg_Is_Queuing_Policy;

      ------------------------------------
      -- Check_Arg_Is_Static_Expression --
      ------------------------------------

      procedure Check_Arg_Is_Static_Expression
        (Arg : Node_Id;
         Typ : Entity_Id)
      is
         Argx : constant Node_Id := Get_Pragma_Arg (Arg);

      begin
         Analyze_And_Resolve (Argx, Typ);

         if Is_OK_Static_Expression (Argx) then
            return;

         elsif Etype (Argx) = Any_Type then
            raise Pragma_Exit;

         --  An interesting special case, if we have a string literal and
         --  we are in Ada 83 mode, then we allow it even though it will
         --  not be flagged as static. This allows the use of Ada 95
         --  pragmas like Import in Ada 83 mode. They will of course be
         --  flagged with warnings as usual, but will not cause errors.

         elsif Ada_Version = Ada_83
           and then Nkind (Argx) = N_String_Literal
         then
            return;

         --  Static expression that raises Constraint_Error. This has
         --  already been flagged, so just exit from pragma processing.

         elsif Is_Static_Expression (Argx) then
            raise Pragma_Exit;

         --  Finally, we have a real error

         else
            Error_Msg_Name_1 := Chars (N);
            Flag_Non_Static_Expr
              ("argument for pragma% must be a static expression!", Argx);
            raise Pragma_Exit;
         end if;
      end Check_Arg_Is_Static_Expression;

      ---------------------------------
      -- Check_Arg_Is_String_Literal --
      ---------------------------------

      procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
         Argx : constant Node_Id := Get_Pragma_Arg (Arg);

      begin
         if Nkind (Argx) /= N_String_Literal then
            Error_Pragma_Arg
              ("argument for pragma% must be string literal", Argx);
         end if;

      end Check_Arg_Is_String_Literal;

      ------------------------------------------
      -- Check_Arg_Is_Task_Dispatching_Policy --
      ------------------------------------------

      procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
         Argx : constant Node_Id := Get_Pragma_Arg (Arg);

      begin
         Check_Arg_Is_Identifier (Argx);

         if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
            Error_Pragma_Arg
              ("& is not a valid task dispatching policy name", Argx);
         end if;
      end Check_Arg_Is_Task_Dispatching_Policy;

      --------------------------------
      -- Check_At_Least_N_Arguments --
      --------------------------------

      procedure Check_At_Least_N_Arguments (N : Nat) is
      begin
         if Arg_Count < N then
            Error_Pragma ("too few arguments for pragma%");
         end if;
      end Check_At_Least_N_Arguments;

      -------------------------------
      -- Check_At_Most_N_Arguments --
      -------------------------------

      procedure Check_At_Most_N_Arguments (N : Nat) is
         Arg : Node_Id;

      begin
         if Arg_Count > N then
            Arg := Arg1;

            for J in 1 .. N loop
               Next (Arg);
               Error_Pragma_Arg ("too many arguments for pragma%", Arg);
            end loop;
         end if;
      end Check_At_Most_N_Arguments;

      -------------------------
      -- Check_First_Subtype --
      -------------------------

      procedure Check_First_Subtype (Arg : Node_Id) is
         Argx : constant Node_Id := Get_Pragma_Arg (Arg);

      begin
         if not Is_First_Subtype (Entity (Argx)) then
            Error_Pragma_Arg
              ("pragma% cannot apply to subtype", Argx);
         end if;
      end Check_First_Subtype;

      ---------------------------
      -- Check_In_Main_Program --
      ---------------------------

      procedure Check_In_Main_Program is
         P : constant Node_Id := Parent (N);

      begin
         --  Must be at in subprogram body

         if Nkind (P) /= N_Subprogram_Body then
            Error_Pragma ("% pragma allowed only in subprogram");

         --  Otherwise warn if obviously not main program

         elsif Present (Parameter_Specifications (Specification (P)))
           or else not Is_Compilation_Unit (Defining_Entity (P))
         then
            Error_Msg_Name_1 := Chars (N);
            Error_Msg_N
              ("?pragma% is only effective in main program", N);
         end if;
      end Check_In_Main_Program;

      ---------------------------------------
      -- Check_Interrupt_Or_Attach_Handler --
      ---------------------------------------

      procedure Check_Interrupt_Or_Attach_Handler is
         Arg1_X : constant Node_Id := Expression (Arg1);

      begin
         Analyze (Arg1_X);

         if not Is_Entity_Name (Arg1_X) then
            Error_Pragma_Arg
              ("argument of pragma% must be entity name", Arg1);

         elsif Prag_Id = Pragma_Interrupt_Handler then
            Check_Restriction (No_Dynamic_Attachment, N);
         end if;

         declare
            Handler_Proc : Entity_Id := Empty;
            Proc_Scope   : Entity_Id;
            Found        : Boolean := False;

         begin
            if not Is_Overloaded (Arg1_X) then
               Handler_Proc := Entity (Arg1_X);

            else
               declare
                  It    : Interp;
                  Index : Interp_Index;

               begin
                  Get_First_Interp (Arg1_X, Index, It);
                  while Present (It.Nam) loop
                     Handler_Proc := It.Nam;

                     if Ekind (Handler_Proc) = E_Procedure
                       and then No (First_Formal (Handler_Proc))
                     then
                        if not Found then
                           Found := True;
                           Set_Entity (Arg1_X, Handler_Proc);
                           Set_Is_Overloaded (Arg1_X, False);
                        else
                           Error_Pragma_Arg
                             ("ambiguous handler name for pragma% ", Arg1);
                        end if;
                     end if;

                     Get_Next_Interp (Index, It);
                  end loop;

                  if not Found then
                     Error_Pragma_Arg
                       ("argument of pragma% must be parameterless procedure",
                        Arg1);
                  else
                     Handler_Proc := Entity (Arg1_X);
                  end if;
               end;
            end if;

            Proc_Scope := Scope (Handler_Proc);

            --  On AAMP only, a pragma Interrupt_Handler is supported for
            --  nonprotected parameterless procedures.

            if AAMP_On_Target
              and then Prag_Id = Pragma_Interrupt_Handler
            then
               if Ekind (Handler_Proc) /= E_Procedure then
                  Error_Pragma_Arg
                    ("argument of pragma% must be a procedure", Arg1);
               end if;

            elsif Ekind (Handler_Proc) /= E_Procedure
              or else Ekind (Proc_Scope) /= E_Protected_Type
            then
               Error_Pragma_Arg
                 ("argument of pragma% must be protected procedure", Arg1);
            end if;

            if (not AAMP_On_Target or else Prag_Id = Pragma_Attach_Handler)
              and then Ekind (Proc_Scope) = E_Protected_Type
            then
               if Parent (N) /=
                    Protected_Definition (Parent (Proc_Scope))
               then
                  Error_Pragma ("pragma% must be in protected definition");
               end if;
            end if;

            if not Is_Library_Level_Entity (Proc_Scope)
              or else (AAMP_On_Target
                        and then not Is_Library_Level_Entity (Handler_Proc))
            then
               Error_Pragma_Arg
                 ("pragma% requires library-level entity", Arg1);
            end if;

            if Present (First_Formal (Handler_Proc)) then
               Error_Pragma_Arg
                 ("argument of pragma% must be parameterless procedure",
                  Arg1);
            end if;
         end;
      end Check_Interrupt_Or_Attach_Handler;

      -------------------------------------------
      -- Check_Is_In_Decl_Part_Or_Package_Spec --
      -------------------------------------------

      procedure Check_Is_In_Decl_Part_Or_Package_Spec is
         P : Node_Id;

      begin
         P := Parent (N);
         loop
            if No (P) then
               exit;

            elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
               exit;

            elsif Nkind (P) = N_Package_Specification then
               return;

            elsif Nkind (P) = N_Block_Statement then
               return;

            --  Note: the following tests seem a little peculiar, because
            --  they test for bodies, but if we were in the statement part
            --  of the body, we would already have hit the handled statement
            --  sequence, so the only way we get here is by being in the
            --  declarative part of the body.

            elsif Nkind (P) = N_Subprogram_Body
              or else Nkind (P) = N_Package_Body
              or else Nkind (P) = N_Task_Body
              or else Nkind (P) = N_Entry_Body
            then
               return;
            end if;

            P := Parent (P);
         end loop;

         Error_Pragma ("pragma% is not in declarative part or package spec");
      end Check_Is_In_Decl_Part_Or_Package_Spec;

      -------------------------
      -- Check_No_Identifier --
      -------------------------

      procedure Check_No_Identifier (Arg : Node_Id) is
      begin
         if Chars (Arg) /= No_Name then
            Error_Pragma_Arg_Ident
              ("pragma% does not permit identifier& here", Arg);
         end if;
      end Check_No_Identifier;

      --------------------------
      -- Check_No_Identifiers --
      --------------------------

      procedure Check_No_Identifiers is
         Arg_Node : Node_Id;

      begin
         if Arg_Count > 0 then
            Arg_Node := Arg1;

            while Present (Arg_Node) loop
               Check_No_Identifier (Arg_Node);
               Next (Arg_Node);
            end loop;
         end if;
      end Check_No_Identifiers;

      -------------------------------
      -- Check_Optional_Identifier --
      -------------------------------

      procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
      begin
         if Present (Arg) and then Chars (Arg) /= No_Name then
            if Chars (Arg) /= Id then
               Error_Msg_Name_1 := Chars (N);
               Error_Msg_Name_2 := Id;
               Error_Msg_N ("pragma% argument expects identifier%", Arg);
               raise Pragma_Exit;
            end if;
         end if;
      end Check_Optional_Identifier;

      procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
      begin
         Name_Buffer (1 .. Id'Length) := Id;
         Name_Len := Id'Length;
         Check_Optional_Identifier (Arg, Name_Find);
      end Check_Optional_Identifier;

      -----------------------------
      -- Check_Static_Constraint --
      -----------------------------

      --  Note: for convenience in writing this procedure, in addition to
      --  the officially (i.e. by spec) allowed argument which is always
      --  a constraint, it also allows ranges and discriminant associations.
      --  Above is not clear ???

      procedure Check_Static_Constraint (Constr : Node_Id) is

         --------------------
         -- Require_Static --
         --------------------

         procedure Require_Static (E : Node_Id);
         --  Require given expression to be static expression

         procedure Require_Static (E : Node_Id) is
         begin
            if not Is_OK_Static_Expression (E) then
               Flag_Non_Static_Expr
                 ("non-static constraint not allowed in Unchecked_Union!", E);
               raise Pragma_Exit;
            end if;
         end Require_Static;

      --  Start of processing for Check_Static_Constraint

      begin
         case Nkind (Constr) is
            when N_Discriminant_Association =>
               Require_Static (Expression (Constr));

            when N_Range =>
               Require_Static (Low_Bound (Constr));
               Require_Static (High_Bound (Constr));

            when N_Attribute_Reference =>
               Require_Static (Type_Low_Bound  (Etype (Prefix (Constr))));
               Require_Static (Type_High_Bound (Etype (Prefix (Constr))));

            when N_Range_Constraint =>
               Check_Static_Constraint (Range_Expression (Constr));

            when N_Index_Or_Discriminant_Constraint =>
               declare
                  IDC : Entity_Id := First (Constraints (Constr));
               begin
                  while Present (IDC) loop
                     Check_Static_Constraint (IDC);
                     Next (IDC);
                  end loop;
               end;

            when others =>
               null;
         end case;
      end Check_Static_Constraint;

      --------------------------------------
      -- Check_Valid_Configuration_Pragma --
      --------------------------------------

      --  A configuration pragma must appear in the context clause of
      --  a compilation unit, at the start of the list (i.e. only other
      --  pragmas may precede it).

      procedure Check_Valid_Configuration_Pragma is
      begin
         if not Is_Configuration_Pragma then
            Error_Pragma ("incorrect placement for configuration pragma%");
         end if;
      end Check_Valid_Configuration_Pragma;

      -------------------------------------
      -- Check_Valid_Library_Unit_Pragma --
      -------------------------------------

      procedure Check_Valid_Library_Unit_Pragma is
         Plist       : List_Id;
         Parent_Node : Node_Id;
         Unit_Name   : Entity_Id;
         Unit_Kind   : Node_Kind;
         Unit_Node   : Node_Id;
         Sindex      : Source_File_Index;

      begin
         if not Is_List_Member (N) then
            Pragma_Misplaced;

         else
            Plist := List_Containing (N);
            Parent_Node := Parent (Plist);

            if Parent_Node = Empty then
               Pragma_Misplaced;

            --  Case of pragma appearing after a compilation unit. In this
            --  case it must have an argument with the corresponding name
            --  and must be part of the following pragmas of its parent.

            elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
               if Plist /= Pragmas_After (Parent_Node) then
                  Pragma_Misplaced;

               elsif Arg_Count = 0 then
                  Error_Pragma
                    ("argument required if outside compilation unit");

               else
                  Check_No_Identifiers;
                  Check_Arg_Count (1);
                  Unit_Node := Unit (Parent (Parent_Node));
                  Unit_Kind := Nkind (Unit_Node);

                  Analyze (Expression (Arg1));

                  if        Unit_Kind = N_Generic_Subprogram_Declaration
                    or else Unit_Kind = N_Subprogram_Declaration
                  then
                     Unit_Name := Defining_Entity (Unit_Node);

                  elsif     Unit_Kind = N_Function_Instantiation
                    or else Unit_Kind = N_Package_Instantiation
                    or else Unit_Kind = N_Procedure_Instantiation
                  then
                     Unit_Name := Defining_Entity (Unit_Node);

                  else
                     Unit_Name := Cunit_Entity (Current_Sem_Unit);
                  end if;

                  if Chars (Unit_Name) /=
                     Chars (Entity (Expression (Arg1)))
                  then
                     Error_Pragma_Arg
                       ("pragma% argument is not current unit name", Arg1);
                  end if;

                  if Ekind (Unit_Name) = E_Package
                    and then Present (Renamed_Entity (Unit_Name))
                  then
                     Error_Pragma ("pragma% not allowed for renamed package");
                  end if;
               end if;

            --  Pragma appears other than after a compilation unit

            else
               --  Here we check for the generic instantiation case and also
               --  for the case of processing a generic formal package. We
               --  detect these cases by noting that the Sloc on the node
               --  does not belong to the current compilation unit.

               Sindex := Source_Index (Current_Sem_Unit);

               if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
                  Rewrite (N, Make_Null_Statement (Loc));
                  return;

               --  If before first declaration, the pragma applies to the
               --  enclosing unit, and the name if present must be this name.

               elsif Is_Before_First_Decl (N, Plist) then
                  Unit_Node := Unit_Declaration_Node (Current_Scope);
                  Unit_Kind := Nkind (Unit_Node);

                  if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
                     Pragma_Misplaced;

                  elsif Unit_Kind = N_Subprogram_Body
                    and then not Acts_As_Spec (Unit_Node)
                  then
                     Pragma_Misplaced;

                  elsif Nkind (Parent_Node) = N_Package_Body then
                     Pragma_Misplaced;

                  elsif Nkind (Parent_Node) = N_Package_Specification
                    and then Plist = Private_Declarations (Parent_Node)
                  then
                     Pragma_Misplaced;

                  elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
                          or else Nkind (Parent_Node)
                            = N_Generic_Subprogram_Declaration)
                    and then Plist = Generic_Formal_Declarations (Parent_Node)
                  then
                     Pragma_Misplaced;

                  elsif Arg_Count > 0 then
                     Analyze (Expression (Arg1));

                     if Entity (Expression (Arg1)) /= Current_Scope then
                        Error_Pragma_Arg
                          ("name in pragma% must be enclosing unit", Arg1);
                     end if;

                  --  It is legal to have no argument in this context

                  else
                     return;
                  end if;

               --  Error if not before first declaration. This is because a
               --  library unit pragma argument must be the name of a library
               --  unit (RM 10.1.5(7)), but the only names permitted in this
               --  context are (RM 10.1.5(6)) names of subprogram declarations,
               --  generic subprogram declarations or generic instantiations.

               else
                  Error_Pragma
                    ("pragma% misplaced, must be before first declaration");
               end if;
            end if;
         end if;
      end Check_Valid_Library_Unit_Pragma;

      ------------------
      -- Error_Pragma --
      ------------------

      procedure Error_Pragma (Msg : String) is
      begin
         Error_Msg_Name_1 := Chars (N);
         Error_Msg_N (Msg, N);
         raise Pragma_Exit;
      end Error_Pragma;

      ----------------------
      -- Error_Pragma_Arg --
      ----------------------

      procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
      begin
         Error_Msg_Name_1 := Chars (N);
         Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
         raise Pragma_Exit;
      end Error_Pragma_Arg;

      procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
      begin
         Error_Msg_Name_1 := Chars (N);
         Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
         Error_Pragma_Arg (Msg2, Arg);
      end Error_Pragma_Arg;

      ----------------------------
      -- Error_Pragma_Arg_Ident --
      ----------------------------

      procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
      begin
         Error_Msg_Name_1 := Chars (N);
         Error_Msg_N (Msg, Arg);
         raise Pragma_Exit;
      end Error_Pragma_Arg_Ident;

      ------------------------
      -- Find_Lib_Unit_Name --
      ------------------------

      function Find_Lib_Unit_Name return Entity_Id is
      begin
         --  Return inner compilation unit entity, for case of nested
         --  categorization pragmas. This happens in generic unit.

         if Nkind (Parent (N)) = N_Package_Specification
           and then Defining_Entity (Parent (N)) /= Current_Scope
         then
            return Defining_Entity (Parent (N));
         else
            return Current_Scope;
         end if;
      end Find_Lib_Unit_Name;

      ----------------------------
      -- Find_Program_Unit_Name --
      ----------------------------

      procedure Find_Program_Unit_Name (Id : Node_Id) is
         Unit_Name : Entity_Id;
         Unit_Kind : Node_Kind;
         P         : constant Node_Id := Parent (N);

      begin
         if Nkind (P) = N_Compilation_Unit then
            Unit_Kind := Nkind (Unit (P));

            if Unit_Kind = N_Subprogram_Declaration
              or else Unit_Kind = N_Package_Declaration
              or else Unit_Kind in N_Generic_Declaration
            then
               Unit_Name := Defining_Entity (Unit (P));

               if Chars (Id) = Chars (Unit_Name) then
                  Set_Entity (Id, Unit_Name);
                  Set_Etype (Id, Etype (Unit_Name));
               else
                  Set_Etype (Id, Any_Type);
                  Error_Pragma
                    ("cannot find program unit referenced by pragma%");
               end if;

            else
               Set_Etype (Id, Any_Type);
               Error_Pragma ("pragma% inapplicable to this unit");
            end if;

         else
            Analyze (Id);
         end if;

      end Find_Program_Unit_Name;

      -------------------------
      -- Gather_Associations --
      -------------------------

      procedure Gather_Associations
        (Names : Name_List;
         Args  : out Args_List)
      is
         Arg : Node_Id;

      begin
         --  Initialize all parameters to Empty

         for J in Args'Range loop
            Args (J) := Empty;
         end loop;

         --  That's all we have to do if there are no argument associations

         if No (Pragma_Argument_Associations (N)) then
            return;
         end if;

         --  Otherwise first deal with any positional parameters present

         Arg := First (Pragma_Argument_Associations (N));

         for Index in Args'Range loop
            exit when No (Arg) or else Chars (Arg) /= No_Name;
            Args (Index) := Expression (Arg);
            Next (Arg);
         end loop;

         --  Positional parameters all processed, if any left, then we
         --  have too many positional parameters.

         if Present (Arg) and then Chars (Arg) = No_Name then
            Error_Pragma_Arg
              ("too many positional associations for pragma%", Arg);
         end if;

         --  Process named parameters if any are present

         while Present (Arg) loop
            if Chars (Arg) = No_Name then
               Error_Pragma_Arg
                 ("positional association cannot follow named association",
                  Arg);

            else
               for Index in Names'Range loop
                  if Names (Index) = Chars (Arg) then
                     if Present (Args (Index)) then
                        Error_Pragma_Arg
                          ("duplicate argument association for pragma%", Arg);
                     else
                        Args (Index) := Expression (Arg);
                        exit;
                     end if;
                  end if;

                  if Index = Names'Last then
                     Error_Msg_Name_1 := Chars (N);
                     Error_Msg_N ("pragma% does not allow & argument", Arg);

                     --  Check for possible misspelling

                     for Index1 in Names'Range loop
                        if Is_Bad_Spelling_Of
                             (Get_Name_String (Chars (Arg)),
                              Get_Name_String (Names (Index1)))
                        then
                           Error_Msg_Name_1 := Names (Index1);
                           Error_Msg_N ("\possible misspelling of%", Arg);
                           exit;
                        end if;
                     end loop;

                     raise Pragma_Exit;
                  end if;
               end loop;
            end if;

            Next (Arg);
         end loop;
      end Gather_Associations;

      --------------------
      -- Get_Pragma_Arg --
      --------------------

      function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
      begin
         if Nkind (Arg) = N_Pragma_Argument_Association then
            return Expression (Arg);
         else
            return Arg;
         end if;
      end Get_Pragma_Arg;

      -----------------
      -- GNAT_Pragma --
      -----------------

      procedure GNAT_Pragma is
      begin
         Check_Restriction (No_Implementation_Pragmas, N);
      end GNAT_Pragma;

      --------------------------
      -- Is_Before_First_Decl --
      --------------------------

      function Is_Before_First_Decl
        (Pragma_Node : Node_Id;
         Decls       : List_Id) return Boolean
      is
         Item : Node_Id := First (Decls);

      begin
         --  Only other pragmas can come before this pragma

         loop
            if No (Item) or else Nkind (Item) /= N_Pragma then
               return False;

            elsif Item = Pragma_Node then
               return True;
            end if;

            Next (Item);
         end loop;
      end Is_Before_First_Decl;

      -----------------------------
      -- Is_Configuration_Pragma --
      -----------------------------

      --  A configuration pragma must appear in the context clause of
      --  a compilation unit, at the start of the list (i.e. only other
      --  pragmas may precede it).

      function Is_Configuration_Pragma return Boolean is
         Lis : constant List_Id := List_Containing (N);
         Par : constant Node_Id := Parent (N);
         Prg : Node_Id;

      begin
         --  If no parent, then we are in the configuration pragma file,
         --  so the placement is definitely appropriate.

         if No (Par) then
            return True;

         --  Otherwise we must be in the context clause of a compilation unit
         --  and the only thing allowed before us in the context list is more
         --  configuration pragmas.

         elsif Nkind (Par) = N_Compilation_Unit
           and then Context_Items (Par) = Lis
         then
            Prg := First (Lis);

            loop
               if Prg = N then
                  return True;
               elsif Nkind (Prg) /= N_Pragma then
                  return False;
               end if;

               Next (Prg);
            end loop;

         else
            return False;
         end if;
      end Is_Configuration_Pragma;

      ----------------------
      -- Pragma_Misplaced --
      ----------------------

      procedure Pragma_Misplaced is
      begin
         Error_Pragma ("incorrect placement of pragma%");
      end Pragma_Misplaced;

      ------------------------------------
      -- Process Atomic_Shared_Volatile --
      ------------------------------------

      procedure Process_Atomic_Shared_Volatile is
         E_Id : Node_Id;
         E    : Entity_Id;
         D    : Node_Id;
         K    : Node_Kind;
         Utyp : Entity_Id;

         procedure Set_Atomic (E : Entity_Id);
         --  Set given type as atomic, and if no explicit alignment was
         --  given, set alignment to unknown, since back end knows what
         --  the alignment requirements are for atomic arrays. Note that
         --  this step is necessary for derived types.

         ----------------
         -- Set_Atomic --
         ----------------

         procedure Set_Atomic (E : Entity_Id) is
         begin
            Set_Is_Atomic (E);

            if not Has_Alignment_Clause (E) then
               Set_Alignment (E, Uint_0);
            end if;
         end Set_Atomic;

      --  Start of processing for Process_Atomic_Shared_Volatile

      begin
         Check_Ada_83_Warning;
         Check_No_Identifiers;
         Check_Arg_Count (1);
         Check_Arg_Is_Local_Name (Arg1);
         E_Id := Expression (Arg1);

         if Etype (E_Id) = Any_Type then
            return;
         end if;

         E := Entity (E_Id);
         D := Declaration_Node (E);
         K := Nkind (D);

         if Is_Type (E) then
            if Rep_Item_Too_Early (E, N)
                 or else
               Rep_Item_Too_Late (E, N)
            then
               return;
            else
               Check_First_Subtype (Arg1);
            end if;

            if Prag_Id /= Pragma_Volatile then
               Set_Atomic (E);
               Set_Atomic (Underlying_Type (E));
               Set_Atomic (Base_Type (E));
            end if;

            --  Attribute belongs on the base type. If the
            --  view of the type is currently private, it also
            --  belongs on the underlying type.

            Set_Is_Volatile (Base_Type (E));
            Set_Is_Volatile (Underlying_Type (E));

            Set_Treat_As_Volatile (E);
            Set_Treat_As_Volatile (Underlying_Type (E));

         elsif K = N_Object_Declaration
           or else (K = N_Component_Declaration
                     and then Original_Record_Component (E) = E)
         then
            if Rep_Item_Too_Late (E, N) then
               return;
            end if;

            if Prag_Id /= Pragma_Volatile then
               Set_Is_Atomic (E);

               --  If the object declaration has an explicit
               --  initialization, a temporary may have to be
               --  created to hold the expression, to insure
               --  that access to the object remain atomic.

               if Nkind (Parent (E)) = N_Object_Declaration
                 and then Present (Expression (Parent (E)))
               then
                  Set_Has_Delayed_Freeze (E);
               end if;

               --  An interesting improvement here. If an object of type X
               --  is declared atomic, and the type X is not atomic, that's
               --  a pity, since it may not have appropraite alignment etc.
               --  We can rescue this in the special case where the object
               --  and type are in the same unit by just setting the type
               --  as atomic, so that the back end will process it as atomic.

               Utyp := Underlying_Type (Etype (E));

               if Present (Utyp)
                 and then Sloc (E) > No_Location
                 and then Sloc (Utyp) > No_Location
                 and then
                   Get_Source_File_Index (Sloc (E)) =
                   Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
               then
                  Set_Is_Atomic (Underlying_Type (Etype (E)));
               end if;
            end if;

            Set_Is_Volatile (E);
            Set_Treat_As_Volatile (E);

         else
            Error_Pragma_Arg
              ("inappropriate entity for pragma%", Arg1);
         end if;
      end Process_Atomic_Shared_Volatile;

      ------------------------
      -- Process_Convention --
      ------------------------

      procedure Process_Convention
        (C : out Convention_Id;
         E : out Entity_Id)
      is
         Id        : Node_Id;
         E1        : Entity_Id;
         Cname     : Name_Id;
         Comp_Unit : Unit_Number_Type;

         procedure Set_Convention_From_Pragma (E : Entity_Id);
         --  Set convention in entity E, and also flag that the entity has a
         --  convention pragma. If entity is for a private or incomplete type,
         --  also set convention and flag on underlying type. This procedure
         --  also deals with the special case of C_Pass_By_Copy convention.

         --------------------------------
         -- Set_Convention_From_Pragma --
         --------------------------------

         procedure Set_Convention_From_Pragma (E : Entity_Id) is
         begin
            Set_Convention (E, C);
            Set_Has_Convention_Pragma (E);

            if Is_Incomplete_Or_Private_Type (E) then
               Set_Convention            (Underlying_Type (E), C);
               Set_Has_Convention_Pragma (Underlying_Type (E), True);
            end if;

            --  A class-wide type should inherit the convention of
            --  the specific root type (although this isn't specified
            --  clearly by the RM).

            if Is_Type (E) and then Present (Class_Wide_Type (E)) then
               Set_Convention (Class_Wide_Type (E), C);
            end if;

            --  If the entity is a record type, then check for special case
            --  of C_Pass_By_Copy, which is treated the same as C except that
            --  the special record flag is set. This convention is also only
            --  permitted on record types (see AI95-00131).

            if Cname = Name_C_Pass_By_Copy then
               if Is_Record_Type (E) then
                  Set_C_Pass_By_Copy (Base_Type (E));
               elsif Is_Incomplete_Or_Private_Type (E)
                 and then Is_Record_Type (Underlying_Type (E))
               then
                  Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
               else
                  Error_Pragma_Arg
                    ("C_Pass_By_Copy convention allowed only for record type",
                     Arg2);
               end if;
            end if;

            --  If the entity is a derived boolean type, check for the
            --  special case of convention C, C++, or Fortran, where we
            --  consider any nonzero value to represent true.

            if Is_Discrete_Type (E)
              and then Root_Type (Etype (E)) = Standard_Boolean
              and then
                (C = Convention_C
                   or else
                 C = Convention_CPP
                   or else
                 C = Convention_Fortran)
            then
               Set_Nonzero_Is_True (Base_Type (E));
            end if;
         end Set_Convention_From_Pragma;

      --  Start of processing for Process_Convention

      begin
         Check_At_Least_N_Arguments (2);
         Check_Arg_Is_Identifier (Arg1);
         Check_Optional_Identifier (Arg1, Name_Convention);
         Cname := Chars (Expression (Arg1));

         --  C_Pass_By_Copy is treated as a synonym for convention C
         --  (this is tested again below to set the critical flag)

         if Cname = Name_C_Pass_By_Copy then
            C := Convention_C;

         --  Otherwise we must have something in the standard convention list

         elsif Is_Convention_Name (Cname) then
            C := Get_Convention_Id (Chars (Expression (Arg1)));

         --  In DEC VMS, it seems that there is an undocumented feature
         --  that any unrecognized convention is treated as the default,
         --  which for us is convention C. It does not seem so terrible
         --  to do this unconditionally, silently in the VMS case, and
         --  with a warning in the non-VMS case.

         else
            if Warn_On_Export_Import and not OpenVMS_On_Target then
               Error_Msg_N
                 ("?unrecognized convention name, C assumed",
                  Expression (Arg1));
            end if;

            C := Convention_C;
         end if;

         Check_Arg_Is_Local_Name (Arg2);
         Check_Optional_Identifier (Arg2, Name_Entity);

         Id := Expression (Arg2);
         Analyze (Id);

         if not Is_Entity_Name (Id) then
            Error_Pragma_Arg ("entity name required", Arg2);
         end if;

         E := Entity (Id);

         --  Go to renamed subprogram if present, since convention applies
         --  to the actual renamed entity, not to the renaming entity.

         if Is_Subprogram (E)
           and then Present (Alias (E))
           and then Nkind (Parent (Declaration_Node (E))) =
                      N_Subprogram_Renaming_Declaration
         then
            E := Alias (E);
         end if;

         --  Check that we not applying this to a specless body

         if Is_Subprogram (E)
           and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
         then
            Error_Pragma
              ("pragma% requires separate spec and must come before body");
         end if;

         --  Check that we are not applying this to a named constant

         if Ekind (E) = E_Named_Integer
              or else
            Ekind (E) = E_Named_Real
         then
            Error_Msg_Name_1 := Chars (N);
            Error_Msg_N
              ("cannot apply pragma% to named constant!",
               Get_Pragma_Arg (Arg2));
            Error_Pragma_Arg
              ("\supply appropriate type for&!", Arg2);
         end if;

         if Etype (E) = Any_Type
           or else Rep_Item_Too_Early (E, N)
         then
            raise Pragma_Exit;
         else
            E := Underlying_Type (E);
         end if;

         if Rep_Item_Too_Late (E, N) then
            raise Pragma_Exit;
         end if;

         if Has_Convention_Pragma (E) then
            Error_Pragma_Arg
              ("at most one Convention/Export/Import pragma is allowed", Arg2);

         elsif Convention (E) = Convention_Protected
           or else Ekind (Scope (E)) = E_Protected_Type
         then
            Error_Pragma_Arg
              ("a protected operation cannot be given a different convention",
                Arg2);
         end if;

         --  For Intrinsic, a subprogram is required

         if C = Convention_Intrinsic
           and then not Is_Subprogram (E)
           and then not Is_Generic_Subprogram (E)
         then
            Error_Pragma_Arg
              ("second argument of pragma% must be a subprogram", Arg2);
         end if;

         --  For Stdcall, a subprogram, variable or subprogram type is required

         if C = Convention_Stdcall
           and then not Is_Subprogram (E)
           and then not Is_Generic_Subprogram (E)
           and then Ekind (E) /= E_Variable
           and then not
             (Is_Access_Type (E)
              and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
         then
            Error_Pragma_Arg
              ("second argument of pragma% must be subprogram (type)",
               Arg2);
         end if;

         if not Is_Subprogram (E)
           and then not Is_Generic_Subprogram (E)
         then
            Set_Convention_From_Pragma (E);

            if Is_Type (E) then

               Check_First_Subtype (Arg2);
               Set_Convention_From_Pragma (Base_Type (E));

               --  For subprograms, we must set the convention on the
               --  internally generated directly designated type as well.

               if Ekind (E) = E_Access_Subprogram_Type then
                  Set_Convention_From_Pragma (Directly_Designated_Type (E));
               end if;
            end if;

         --  For the subprogram case, set proper convention for all homonyms
         --  in same scope and the same declarative part, i.e. the same
         --  compilation unit.

         else
            Comp_Unit := Get_Source_Unit (E);
            Set_Convention_From_Pragma (E);

            --  Treat a pragma Import as an implicit body, for GPS use.

            if Prag_Id = Pragma_Import then
                  Generate_Reference (E, Id, 'b');
            end if;

            E1 := E;
            loop
               E1 := Homonym (E1);
               exit when No (E1) or else Scope (E1) /= Current_Scope;

               --  Note: below we are missing a check for Rep_Item_Too_Late.
               --  That is deliberate, we cannot chain the rep item on more
               --  than one Rep_Item chain, to be fixed later ???

               if Comes_From_Source (E1)
                 and then Comp_Unit = Get_Source_Unit (E1)
                 and then Nkind (Original_Node (Parent (E1))) /=
                   N_Full_Type_Declaration
               then
                  Set_Convention_From_Pragma (E1);

                  if Prag_Id = Pragma_Import then
                     Generate_Reference (E, Id, 'b');
                  end if;
               end if;
            end loop;
         end if;
      end Process_Convention;

      -----------------------------------------------------
      -- Process_Extended_Import_Export_Exception_Pragma --
      -----------------------------------------------------

      procedure Process_Extended_Import_Export_Exception_Pragma
        (Arg_Internal : Node_Id;
         Arg_External : Node_Id;
         Arg_Form     : Node_Id;
         Arg_Code     : Node_Id)
      is
         Def_Id   : Entity_Id;
         Code_Val : Uint;

      begin
         GNAT_Pragma;

         if not OpenVMS_On_Target then
            Error_Pragma
              ("?pragma% ignored (applies only to Open'V'M'S)");
         end if;

         Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
         Def_Id := Entity (Arg_Internal);

         if Ekind (Def_Id) /= E_Exception then
            Error_Pragma_Arg
              ("pragma% must refer to declared exception", Arg_Internal);
         end if;

         Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);

         if Present (Arg_Form) then
            Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
         end if;

         if Present (Arg_Form)
           and then Chars (Arg_Form) = Name_Ada
         then
            null;
         else
            Set_Is_VMS_Exception (Def_Id);
            Set_Exception_Code (Def_Id, No_Uint);
         end if;

         if Present (Arg_Code) then
            if not Is_VMS_Exception (Def_Id) then
               Error_Pragma_Arg
                 ("Code option for pragma% not allowed for Ada case",
                  Arg_Code);
            end if;

            Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
            Code_Val := Expr_Value (Arg_Code);

            if not UI_Is_In_Int_Range (Code_Val) then
               Error_Pragma_Arg
                 ("Code option for pragma% must be in 32-bit range",
                  Arg_Code);

            else
               Set_Exception_Code (Def_Id, Code_Val);
            end if;
         end if;
      end Process_Extended_Import_Export_Exception_Pragma;

      -------------------------------------------------
      -- Process_Extended_Import_Export_Internal_Arg --
      -------------------------------------------------

      procedure Process_Extended_Import_Export_Internal_Arg
        (Arg_Internal : Node_Id := Empty)
      is
      begin
         GNAT_Pragma;

         if No (Arg_Internal) then
            Error_Pragma ("Internal parameter required for pragma%");
         end if;

         if Nkind (Arg_Internal) = N_Identifier then
            null;

         elsif Nkind (Arg_Internal) = N_Operator_Symbol
           and then (Prag_Id = Pragma_Import_Function
                       or else
                     Prag_Id = Pragma_Export_Function)
         then
            null;

         else
            Error_Pragma_Arg
              ("wrong form for Internal parameter for pragma%", Arg_Internal);
         end if;

         Check_Arg_Is_Local_Name (Arg_Internal);
      end Process_Extended_Import_Export_Internal_Arg;

      --------------------------------------------------
      -- Process_Extended_Import_Export_Object_Pragma --
      --------------------------------------------------

      procedure Process_Extended_Import_Export_Object_Pragma
        (Arg_Internal : Node_Id;
         Arg_External : Node_Id;
         Arg_Size     : Node_Id)
      is
         Def_Id : Entity_Id;

      begin
         Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
         Def_Id := Entity (Arg_Internal);

         if Ekind (Def_Id) /= E_Constant
           and then Ekind (Def_Id) /= E_Variable
         then
            Error_Pragma_Arg
              ("pragma% must designate an object", Arg_Internal);
         end if;

         if Is_Psected (Def_Id) then
            Error_Pragma_Arg
              ("previous Psect_Object applies, pragma % not permitted",
               Arg_Internal);
         end if;

         if Rep_Item_Too_Late (Def_Id, N) then
            raise Pragma_Exit;
         end if;

         Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);

         if Present (Arg_Size) then
            Check_Arg_Is_External_Name (Arg_Size);
         end if;

         --  Export_Object case

         if Prag_Id = Pragma_Export_Object then
            if not Is_Library_Level_Entity (Def_Id) then
               Error_Pragma_Arg
                 ("argument for pragma% must be library level entity",
                  Arg_Internal);
            end if;

            if Ekind (Current_Scope) = E_Generic_Package then
               Error_Pragma ("pragma& cannot appear in a generic unit");
            end if;

            if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
               Error_Pragma_Arg
                 ("exported object must have compile time known size",
                  Arg_Internal);
            end if;

            if Warn_On_Export_Import and then Is_Exported (Def_Id) then
               Error_Msg_N
                 ("?duplicate Export_Object pragma", N);
            else
               Set_Exported (Def_Id, Arg_Internal);
            end if;

         --  Import_Object case

         else
            if Is_Concurrent_Type (Etype (Def_Id)) then
               Error_Pragma_Arg
                 ("cannot use pragma% for task/protected object",
                  Arg_Internal);
            end if;

            if Ekind (Def_Id) = E_Constant then
               Error_Pragma_Arg
                 ("cannot import a constant", Arg_Internal);
            end if;

            if Warn_On_Export_Import
              and then Has_Discriminants (Etype (Def_Id))
            then
               Error_Msg_N
                 ("imported value must be initialized?", Arg_Internal);
            end if;

            if Warn_On_Export_Import
              and then Is_Access_Type (Etype (Def_Id))
            then
               Error_Pragma_Arg
                 ("cannot import object of an access type?", Arg_Internal);
            end if;

            if Warn_On_Export_Import
              and then Is_Imported (Def_Id)
            then
               Error_Msg_N
                 ("?duplicate Import_Object pragma", N);

            --  Check for explicit initialization present. Note that an
            --  initialization that generated by the code generator, e.g.
            --  for an access type, does not count here.

            elsif Present (Expression (Parent (Def_Id)))
               and then
                 Comes_From_Source
                   (Original_Node (Expression (Parent (Def_Id))))
            then
               Error_Msg_Sloc := Sloc (Def_Id);
               Error_Pragma_Arg
                 ("no initialization allowed for declaration of& #",
                  "\imported entities cannot be initialized ('R'M' 'B.1(24))",
                  Arg1);
            else
               Set_Imported (Def_Id);
               Note_Possible_Modification (Arg_Internal);
            end if;
         end if;
      end Process_Extended_Import_Export_Object_Pragma;

      ------------------------------------------------------
      -- Process_Extended_Import_Export_Subprogram_Pragma --
      ------------------------------------------------------

      procedure Process_Extended_Import_Export_Subprogram_Pragma
        (Arg_Internal                 : Node_Id;
         Arg_External                 : Node_Id;
         Arg_Parameter_Types          : Node_Id;
         Arg_Result_Type              : Node_Id := Empty;
         Arg_Mechanism                : Node_Id;
         Arg_Result_Mechanism         : Node_Id := Empty;
         Arg_First_Optional_Parameter : Node_Id := Empty)
      is
         Ent       : Entity_Id;
         Def_Id    : Entity_Id;
         Hom_Id    : Entity_Id;
         Formal    : Entity_Id;
         Ambiguous : Boolean;
         Match     : Boolean;
         Dval      : Node_Id;

         function Same_Base_Type
          (Ptype  : Node_Id;
           Formal : Entity_Id) return Boolean;
         --  Determines if Ptype references the type of Formal. Note that
         --  only the base types need to match according to the spec. Ptype
         --  here is the argument from the pragma, which is either a type
         --  name, or an access attribute.

         --------------------
         -- Same_Base_Type --
         --------------------

         function Same_Base_Type
           (Ptype  : Node_Id;
            Formal : Entity_Id) return Boolean
         is
            Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
            Pref : Node_Id;

         begin
            --  Case where pragma argument is typ'Access

            if Nkind (Ptype) = N_Attribute_Reference
              and then Attribute_Name (Ptype) = Name_Access
            then
               Pref := Prefix (Ptype);
               Find_Type (Pref);

               if not Is_Entity_Name (Pref)
                 or else Entity (Pref) = Any_Type
               then
                  raise Pragma_Exit;
               end if;

               --  We have a match if the corresponding argument is of an
               --  anonymous access type, and its designicated type matches
               --  the type of the prefix of the access attribute

               return Ekind (Ftyp) = E_Anonymous_Access_Type
                 and then Base_Type (Entity (Pref)) =
                            Base_Type (Etype (Designated_Type (Ftyp)));

            --  Case where pragma argument is a type name

            else
               Find_Type (Ptype);

               if not Is_Entity_Name (Ptype)
                 or else Entity (Ptype) = Any_Type
               then
                  raise Pragma_Exit;
               end if;

               --  We have a match if the corresponding argument is of
               --  the type given in the pragma (comparing base types)

               return Base_Type (Entity (Ptype)) = Ftyp;
            end if;
         end Same_Base_Type;

      --  Start of processing for
      --  Process_Extended_Import_Export_Subprogram_Pragma

      begin
         Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
         Hom_Id := Entity (Arg_Internal);
         Ent := Empty;
         Ambiguous := False;

         --  Loop through homonyms (overloadings) of Hom_Id

         while Present (Hom_Id) loop
            Def_Id := Get_Base_Subprogram (Hom_Id);

            --  We need a subprogram in the current scope

            if not Is_Subprogram (Def_Id)
              or else Scope (Def_Id) /= Current_Scope
            then
               null;

            else
               Match := True;

               --  Pragma cannot apply to subprogram body

               if Is_Subprogram (Def_Id)
                 and then
                   Nkind (Parent
                     (Declaration_Node (Def_Id))) = N_Subprogram_Body
               then
                  Error_Pragma
                    ("pragma% requires separate spec"
                      & " and must come before body");
               end if;

               --  Test result type if given, note that the result type
               --  parameter can only be present for the function cases.

               if Present (Arg_Result_Type)
                 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
               then
                  Match := False;

               elsif Etype (Def_Id) /= Standard_Void_Type
                 and then
                   (Chars (N) = Name_Export_Procedure
                      or else Chars (N) = Name_Import_Procedure)
               then
                  Match := False;

               --  Test parameter types if given. Note that this parameter
               --  has not been analyzed (and must not be, since it is
               --  semantic nonsense), so we get it as the parser left it.

               elsif Present (Arg_Parameter_Types) then
                  Check_Matching_Types : declare
                     Formal : Entity_Id;
                     Ptype  : Node_Id;

                  begin
                     Formal := First_Formal (Def_Id);

                     if Nkind (Arg_Parameter_Types) = N_Null then
                        if Present (Formal) then
                           Match := False;
                        end if;

                     --  A list of one type, e.g. (List) is parsed as
                     --  a parenthesized expression.

                     elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
                       and then Paren_Count (Arg_Parameter_Types) = 1
                     then
                        if No (Formal)
                          or else Present (Next_Formal (Formal))
                        then
                           Match := False;
                        else
                           Match :=
                             Same_Base_Type (Arg_Parameter_Types, Formal);
                        end if;

                     --  A list of more than one type is parsed as a aggregate

                     elsif Nkind (Arg_Parameter_Types) = N_Aggregate
                       and then Paren_Count (Arg_Parameter_Types) = 0
                     then
                        Ptype := First (Expressions (Arg_Parameter_Types));
                        while Present (Ptype) or else Present (Formal) loop
                           if No (Ptype)
                             or else No (Formal)
                             or else not Same_Base_Type (Ptype, Formal)
                           then
                              Match := False;
                              exit;
                           else
                              Next_Formal (Formal);
                              Next (Ptype);
                           end if;
                        end loop;

                     --  Anything else is of the wrong form

                     else
                        Error_Pragma_Arg
                          ("wrong form for Parameter_Types parameter",
                           Arg_Parameter_Types);
                     end if;
                  end Check_Matching_Types;
               end if;

               --  Match is now False if the entry we found did not match
               --  either a supplied Parameter_Types or Result_Types argument

               if Match then
                  if No (Ent) then
                     Ent := Def_Id;

                  --  Ambiguous case, the flag Ambiguous shows if we already
                  --  detected this and output the initial messages.

                  else
                     if not Ambiguous then
                        Ambiguous := True;
                        Error_Msg_Name_1 := Chars (N);
                        Error_Msg_N
                          ("pragma% does not uniquely identify subprogram!",
                           N);
                        Error_Msg_Sloc := Sloc (Ent);
                        Error_Msg_N ("matching subprogram #!", N);
                        Ent := Empty;
                     end if;

                     Error_Msg_Sloc := Sloc (Def_Id);
                     Error_Msg_N ("matching subprogram #!", N);
                  end if;
               end if;
            end if;

            Hom_Id := Homonym (Hom_Id);
         end loop;

         --  See if we found an entry

         if No (Ent) then
            if not Ambiguous then
               if Is_Generic_Subprogram (Entity (Arg_Internal)) then
                  Error_Pragma
                    ("pragma% cannot be given for generic subprogram");

               else
                  Error_Pragma
                    ("pragma% does not identify local subprogram");
               end if;
            end if;

            return;
         end if;

         --  Import pragmas must be be for imported entities

         if Prag_Id = Pragma_Import_Function
              or else
            Prag_Id = Pragma_Import_Procedure
              or else
            Prag_Id = Pragma_Import_Valued_Procedure
         then
            if not Is_Imported (Ent) then
               Error_Pragma
                 ("pragma Import or Interface must precede pragma%");
            end if;

         --  Here we have the Export case which can set the entity as exported

         --  But does not do so if the specified external name is null,
         --  since that is taken as a signal in DEC Ada 83 (with which
         --  we want to be compatible) to request no external name.

         elsif Nkind (Arg_External) = N_String_Literal
           and then String_Length (Strval (Arg_External)) = 0
         then
            null;

         --  In all other cases, set entit as exported

         else
            Set_Exported (Ent, Arg_Internal);
         end if;

         --  Special processing for Valued_Procedure cases

         if Prag_Id = Pragma_Import_Valued_Procedure
           or else
            Prag_Id = Pragma_Export_Valued_Procedure
         then
            Formal := First_Formal (Ent);

            if No (Formal) then
               Error_Pragma
                 ("at least one parameter required for pragma%");

            elsif Ekind (Formal) /= E_Out_Parameter then
               Error_Pragma
                 ("first parameter must have mode out for pragma%");

            else
               Set_Is_Valued_Procedure (Ent);
            end if;
         end if;

         Set_Extended_Import_Export_External_Name (Ent, Arg_External);

         --  Process Result_Mechanism argument if present. We have already
         --  checked that this is only allowed for the function case.

         if Present (Arg_Result_Mechanism) then
            Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
         end if;

         --  Process Mechanism parameter if present. Note that this parameter
         --  is not analyzed, and must not be analyzed since it is semantic
         --  nonsense, so we get it in exactly as the parser left it.

         if Present (Arg_Mechanism) then
            declare
               Formal : Entity_Id;
               Massoc : Node_Id;
               Mname  : Node_Id;
               Choice : Node_Id;

            begin
               --  A single mechanism association without a formal parameter
               --  name is parsed as a parenthesized expression. All other
               --  cases are parsed as aggregates, so we rewrite the single
               --  parameter case as an aggregate for consistency.

               if Nkind (Arg_Mechanism) /= N_Aggregate
                 and then Paren_Count (Arg_Mechanism) = 1
               then
                  Rewrite (Arg_Mechanism,
                    Make_Aggregate (Sloc (Arg_Mechanism),
                      Expressions => New_List (
                        Relocate_Node (Arg_Mechanism))));
               end if;

               --  Case of only mechanism name given, applies to all formals

               if Nkind (Arg_Mechanism) /= N_Aggregate then
                  Formal := First_Formal (Ent);
                  while Present (Formal) loop
                     Set_Mechanism_Value (Formal, Arg_Mechanism);
                     Next_Formal (Formal);
                  end loop;

               --  Case of list of mechanism associations given

               else
                  if Null_Record_Present (Arg_Mechanism) then
                     Error_Pragma_Arg
                       ("inappropriate form for Mechanism parameter",
                        Arg_Mechanism);
                  end if;

                  --  Deal with positional ones first

                  Formal := First_Formal (Ent);
                  if Present (Expressions (Arg_Mechanism)) then
                     Mname := First (Expressions (Arg_Mechanism));

                     while Present (Mname) loop
                        if No (Formal) then
                           Error_Pragma_Arg
                             ("too many mechanism associations", Mname);
                        end if;

                        Set_Mechanism_Value (Formal, Mname);
                        Next_Formal (Formal);
                        Next (Mname);
                     end loop;
                  end if;

                  --  Deal with named entries

                  if Present (Component_Associations (Arg_Mechanism)) then
                     Massoc := First (Component_Associations (Arg_Mechanism));

                     while Present (Massoc) loop
                        Choice := First (Choices (Massoc));

                        if Nkind (Choice) /= N_Identifier
                          or else Present (Next (Choice))
                        then
                           Error_Pragma_Arg
                             ("incorrect form for mechanism association",
                              Massoc);
                        end if;

                        Formal := First_Formal (Ent);
                        loop
                           if No (Formal) then
                              Error_Pragma_Arg
                                ("parameter name & not present", Choice);
                           end if;

                           if Chars (Choice) = Chars (Formal) then
                              Set_Mechanism_Value
                                (Formal, Expression (Massoc));
                              exit;
                           end if;

                           Next_Formal (Formal);
                        end loop;

                        Next (Massoc);
                     end loop;
                  end if;
               end if;
            end;
         end if;

         --  Process First_Optional_Parameter argument if present. We have
         --  already checked that this is only allowed for the Import case.

         if Present (Arg_First_Optional_Parameter) then
            if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
               Error_Pragma_Arg
                 ("first optional parameter must be formal parameter name",
                  Arg_First_Optional_Parameter);
            end if;

            Formal := First_Formal (Ent);
            loop
               if No (Formal) then
                  Error_Pragma_Arg
                    ("specified formal parameter& not found",
                     Arg_First_Optional_Parameter);
               end if;

               exit when Chars (Formal) =
                         Chars (Arg_First_Optional_Parameter);

               Next_Formal (Formal);
            end loop;

            Set_First_Optional_Parameter (Ent, Formal);

            --  Check specified and all remaining formals have right form

            while Present (Formal) loop
               if Ekind (Formal) /= E_In_Parameter then
                  Error_Msg_NE
                    ("optional formal& is not of mode in!",
                     Arg_First_Optional_Parameter, Formal);

               else
                  Dval := Default_Value (Formal);

                  if not Present (Dval) then
                     Error_Msg_NE
                       ("optional formal& does not have default value!",
                        Arg_First_Optional_Parameter, Formal);

                  elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
                     null;

                  else
                     Error_Msg_FE
                       ("default value for optional formal& is non-static!",
                        Arg_First_Optional_Parameter, Formal);
                  end if;
               end if;

               Set_Is_Optional_Parameter (Formal);
               Next_Formal (Formal);
            end loop;
         end if;
      end Process_Extended_Import_Export_Subprogram_Pragma;

      --------------------------
      -- Process_Generic_List --
      --------------------------

      procedure Process_Generic_List is
         Arg : Node_Id;
         Exp : Node_Id;

      begin
         GNAT_Pragma;
         Check_No_Identifiers;
         Check_At_Least_N_Arguments (1);

         Arg := Arg1;
         while Present (Arg) loop
            Exp := Expression (Arg);
            Analyze (Exp);

            if not Is_Entity_Name (Exp)
              or else
                (not Is_Generic_Instance (Entity (Exp))
                  and then
                 not Is_Generic_Unit (Entity (Exp)))
            then
               Error_Pragma_Arg
                 ("pragma% argument must be name of generic unit/instance",
                  Arg);
            end if;

            Next (Arg);
         end loop;
      end Process_Generic_List;

      ---------------------------------
      -- Process_Import_Or_Interface --
      ---------------------------------

      procedure Process_Import_Or_Interface is
         C      : Convention_Id;
         Def_Id : Entity_Id;
         Hom_Id : Entity_Id;

      begin
         Process_Convention (C, Def_Id);
         Kill_Size_Check_Code (Def_Id);
         Note_Possible_Modification (Expression (Arg2));

         if Ekind (Def_Id) = E_Variable
              or else
            Ekind (Def_Id) = E_Constant
         then
            --  User initialization is not allowed for imported object, but
            --  the object declaration may contain a default initialization,
            --  that will be discarded. Note that an explicit initialization
            --  only counts if it comes from source, otherwise it is simply
            --  the code generator making an implicit initialization explicit.

            if Present (Expression (Parent (Def_Id)))
               and then Comes_From_Source (Expression (Parent (Def_Id)))
            then
               Error_Msg_Sloc := Sloc (Def_Id);
               Error_Pragma_Arg
                 ("no initialization allowed for declaration of& #",
                  "\imported entities cannot be initialized ('R'M' 'B.1(24))",
                  Arg2);

            else
               Set_Imported (Def_Id);
               Set_Is_Public (Def_Id);
               Process_Interface_Name (Def_Id, Arg3, Arg4);

               --  pragma Import completes deferred constants

               if Ekind (Def_Id) = E_Constant then
                  Set_Has_Completion (Def_Id);
               end if;

               --  It is not possible to import a constant of an unconstrained
               --  array type (e.g. string) because there is no simple way to
               --  write a meaningful subtype for it.

               if Is_Array_Type (Etype (Def_Id))
                 and then not Is_Constrained (Etype (Def_Id))
               then
                  Error_Msg_NE
                    ("imported constant& must have a constrained subtype",
                      N, Def_Id);
               end if;
            end if;

         elsif Is_Subprogram (Def_Id)
           or else Is_Generic_Subprogram (Def_Id)
         then
            --  If the name is overloaded, pragma applies to all of the
            --  denoted entities in the same declarative part.

            Hom_Id := Def_Id;

            while Present (Hom_Id) loop
               Def_Id := Get_Base_Subprogram (Hom_Id);

               --  Ignore inherited subprograms because the pragma will
               --  apply to the parent operation, which is the one called.

               if Is_Overloadable (Def_Id)
                 and then Present (Alias (Def_Id))
               then
                  null;

               --  If it is not a subprogram, it must be in an outer
               --  scope and pragma does not apply.

               elsif not Is_Subprogram (Def_Id)
                 and then not Is_Generic_Subprogram (Def_Id)
               then
                  null;

               --  Verify that the homonym is in the same declarative
               --  part (not just the same scope).

               elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
                 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
               then
                  exit;

               else
                  Set_Imported (Def_Id);

                  --  If Import intrinsic, set intrinsic flag
                  --  and verify that it is known as such.

                  if C = Convention_Intrinsic then
                     Set_Is_Intrinsic_Subprogram (Def_Id);
                     Check_Intrinsic_Subprogram
                       (Def_Id, Expression (Arg2));
                  end if;

                  --  All interfaced procedures need an external
                  --  symbol created for them since they are
                  --  always referenced from another object file.

                  Set_Is_Public (Def_Id);

                  --  Verify that the subprogram does not have a completion
                  --  through a renaming declaration. For other completions
                  --  the pragma appears as a too late representation.

                  declare
                     Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);

                  begin
                     if Present (Decl)
                       and then Nkind (Decl) = N_Subprogram_Declaration
                       and then Present (Corresponding_Body (Decl))
                       and then
                         Nkind
                           (Unit_Declaration_Node
                             (Corresponding_Body (Decl))) =
                                             N_Subprogram_Renaming_Declaration
                     then
                        Error_Msg_Sloc := Sloc (Def_Id);
                        Error_Msg_NE ("cannot import&#," &
                           " already completed by a renaming",
                           N, Def_Id);
                     end if;
                  end;

                  Set_Has_Completion (Def_Id);
                  Process_Interface_Name (Def_Id, Arg3, Arg4);
               end if;

               if Is_Compilation_Unit (Hom_Id) then

                  --  Its possible homonyms are not affected by the pragma.
                  --  Such homonyms might be present in the context of other
                  --  units being compiled.

                  exit;

               else
                  Hom_Id := Homonym (Hom_Id);
               end if;
            end loop;

         --  When the convention is Java, we also allow Import to be given
         --  for packages, exceptions, and record components.

         elsif C = Convention_Java
           and then
             (Ekind (Def_Id) = E_Package
                or else Ekind (Def_Id) = E_Exception
                or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
         then
            Set_Imported (Def_Id);
            Set_Is_Public (Def_Id);
            Process_Interface_Name (Def_Id, Arg3, Arg4);

         else
            Error_Pragma_Arg
              ("second argument of pragma% must be object or subprogram",
               Arg2);
         end if;

         --  If this pragma applies to a compilation unit, then the unit,
         --  which is a subprogram, does not require (or allow) a body.
         --  We also do not need to elaborate imported procedures.

         if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
            declare
               Cunit : constant Node_Id := Parent (Parent (N));
            begin
               Set_Body_Required (Cunit, False);
            end;
         end if;
      end Process_Import_Or_Interface;

      --------------------
      -- Process_Inline --
      --------------------

      procedure Process_Inline (Active : Boolean) is
         Assoc     : Node_Id;
         Decl      : Node_Id;
         Subp_Id   : Node_Id;
         Subp      : Entity_Id;
         Applies   : Boolean;
         Effective : Boolean := False;

         procedure Make_Inline (Subp : Entity_Id);
         --  Subp is the defining unit name of the subprogram
         --  declaration. Set the flag, as well as the flag in the
         --  corresponding body, if there is one present.

         procedure Set_Inline_Flags (Subp : Entity_Id);
         --  Sets Is_Inlined and Has_Pragma_Inline flags for Subp

         function Cannot_Inline (Subp : Entity_Id) return Boolean;
         --  Do not set the inline flag if body is available and contains
         --  exception handlers, to prevent undefined symbols at link time.
         --  Emit warning if front-end inlining is enabled and the pragma
         --  appears too late.

         -------------------
         -- Cannot_Inline --
         -------------------

         function Cannot_Inline (Subp : Entity_Id) return Boolean is
            Decl : constant Node_Id := Unit_Declaration_Node (Subp);

         begin
            if Nkind (Decl) = N_Subprogram_Body then
               return
                 Present
                   (Exception_Handlers (Handled_Statement_Sequence (Decl)));

            elsif Nkind (Decl) = N_Subprogram_Declaration
              and then Present (Corresponding_Body (Decl))
            then
               if Front_End_Inlining
                 and then Analyzed (Corresponding_Body (Decl))
               then
                  Error_Msg_N ("pragma appears too late, ignored?", N);
                  return True;

               --  If the subprogram is a renaming as body, the body is
               --  just a call to the renamed subprogram, and inlining is
               --  trivially possible.

               elsif
                 Nkind (Unit_Declaration_Node (Corresponding_Body (Decl)))
                   = N_Subprogram_Renaming_Declaration
               then
                  return False;

               else
                  return
                    Present (Exception_Handlers
                      (Handled_Statement_Sequence
                        (Unit_Declaration_Node (Corresponding_Body (Decl)))));
               end if;
            else
               --  If body is not available, assume the best, the check is
               --  performed again when compiling enclosing package bodies.

               return False;
            end if;
         end Cannot_Inline;

         -----------------
         -- Make_Inline --
         -----------------

         procedure Make_Inline (Subp : Entity_Id) is
            Kind       : constant Entity_Kind := Ekind (Subp);
            Inner_Subp : Entity_Id   := Subp;

         begin
            if Etype (Subp) = Any_Type then
               return;

            elsif Cannot_Inline (Subp) then
               Applies := True;    --  Do not treat as an error.
               return;

            --  Here we have a candidate for inlining, but we must exclude
            --  derived operations. Otherwise we will end up trying to
            --  inline a phantom declaration, and the result would be to
            --  drag in a body which has no direct inlining associated with
            --  it. That would not only be inefficient but would also result
            --  in the backend doing cross-unit inlining in cases where it
            --  was definitely inappropriate to do so.

            --  However, a simple Comes_From_Source test is insufficient,
            --  since we do want to allow inlining of generic instances,
            --  which also do not come from source. Predefined operators do
            --  not come from source but are not inlineable either.

            elsif not Comes_From_Source (Subp)
              and then not Is_Generic_Instance (Subp)
              and then Scope (Subp) /= Standard_Standard
            then
               Applies := True;
               return;

            --  The referenced entity must either be the enclosing entity,
            --  or an entity declared within the current open scope.

            elsif Present (Scope (Subp))
              and then Scope (Subp) /= Current_Scope
              and then Subp /= Current_Scope
            then
               Error_Pragma_Arg
                 ("argument of% must be entity in current scope", Assoc);
               return;
            end if;

            --  Processing for procedure, operator or function.
            --  If subprogram is aliased (as for an instance) indicate
            --  that the renamed entity (if declared in the same unit)
            --  is inlined.

            if Is_Subprogram (Subp) then
               while Present (Alias (Inner_Subp)) loop
                  Inner_Subp := Alias (Inner_Subp);
               end loop;

               if In_Same_Source_Unit (Subp, Inner_Subp) then
                  Set_Inline_Flags (Inner_Subp);

                  Decl := Parent (Parent (Inner_Subp));

                  if Nkind (Decl) = N_Subprogram_Declaration
                    and then Present (Corresponding_Body (Decl))
                  then
                     Set_Inline_Flags (Corresponding_Body (Decl));
                  end if;
               end if;

               Applies := True;

            --  For a generic subprogram set flag as well, for use at
            --  the point of instantiation, to determine whether the
            --  body should be generated.

            elsif Is_Generic_Subprogram (Subp) then
               Set_Inline_Flags (Subp);
               Applies := True;

            --  Literals are by definition inlined

            elsif Kind = E_Enumeration_Literal then
               null;

            --  Anything else is an error

            else
               Error_Pragma_Arg
                 ("expect subprogram name for pragma%", Assoc);
            end if;
         end Make_Inline;

         ----------------------
         -- Set_Inline_Flags --
         ----------------------

         procedure Set_Inline_Flags (Subp : Entity_Id) is
         begin
            if Active then
               Set_Is_Inlined (Subp, True);
            end if;

            if not Has_Pragma_Inline (Subp) then
               Set_Has_Pragma_Inline (Subp);
               Set_Next_Rep_Item (N, First_Rep_Item (Subp));
               Set_First_Rep_Item (Subp, N);
               Effective := True;
            end if;
         end Set_Inline_Flags;

      --  Start of processing for Process_Inline

      begin
         Check_No_Identifiers;
         Check_At_Least_N_Arguments (1);

         if Active then
            Inline_Processing_Required := True;
         end if;

         Assoc := Arg1;
         while Present (Assoc) loop
            Subp_Id := Expression (Assoc);
            Analyze (Subp_Id);
            Applies := False;

            if Is_Entity_Name (Subp_Id) then
               Subp := Entity (Subp_Id);

               if Subp = Any_Id then
                  Applies := True;

               else
                  Make_Inline (Subp);

                  while Present (Homonym (Subp))
                    and then Scope (Homonym (Subp)) = Current_Scope
                  loop
                     Make_Inline (Homonym (Subp));
                     Subp := Homonym (Subp);
                  end loop;
               end if;
            end if;

            if not Applies then
               Error_Pragma_Arg
                 ("inappropriate argument for pragma%", Assoc);

            elsif not Effective
              and then Warn_On_Redundant_Constructs
            then
               Error_Msg_NE ("pragma inline on& is redundant?",
                 N, Entity (Subp_Id));
            end if;

            Next (Assoc);
         end loop;
      end Process_Inline;

      ----------------------------
      -- Process_Interface_Name --
      ----------------------------

      procedure Process_Interface_Name
        (Subprogram_Def : Entity_Id;
         Ext_Arg        : Node_Id;
         Link_Arg       : Node_Id)
      is
         Ext_Nam    : Node_Id;
         Link_Nam   : Node_Id;
         String_Val : String_Id;

         procedure Check_Form_Of_Interface_Name (SN : Node_Id);
         --  SN is a string literal node for an interface name. This routine
         --  performs some minimal checks that the name is reasonable. In
         --  particular that no spaces or other obviously incorrect characters
         --  appear. This is only a warning, since any characters are allowed.

         procedure Check_Form_Of_Interface_Name (SN : Node_Id) is
            S  : constant String_Id := Strval (Expr_Value_S (SN));
            SL : constant Nat       := String_Length (S);
            C  : Char_Code;

         begin
            if SL = 0 then
               Error_Msg_N ("interface name cannot be null string", SN);
            end if;

            for J in 1 .. SL loop
               C := Get_String_Char (S, J);

               if Warn_On_Export_Import
                 and then (not In_Character_Range (C)
                             or else Get_Character (C) = ' '
                             or else Get_Character (C) = ',')
               then
                  Error_Msg_N
                    ("?interface name contains illegal character", SN);
               end if;
            end loop;
         end Check_Form_Of_Interface_Name;

      --  Start of processing for Process_Interface_Name

      begin
         if No (Link_Arg) then
            if No (Ext_Arg) then
               return;

            elsif Chars (Ext_Arg) = Name_Link_Name then
               Ext_Nam  := Empty;
               Link_Nam := Expression (Ext_Arg);

            else
               Check_Optional_Identifier (Ext_Arg, Name_External_Name);
               Ext_Nam  := Expression (Ext_Arg);
               Link_Nam := Empty;
            end if;

         else
            Check_Optional_Identifier (Ext_Arg,  Name_External_Name);
            Check_Optional_Identifier (Link_Arg, Name_Link_Name);
            Ext_Nam  := Expression (Ext_Arg);
            Link_Nam := Expression (Link_Arg);
         end if;

         --  Check expressions for external name and link name are static

         if Present (Ext_Nam) then
            Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
            Check_Form_Of_Interface_Name (Ext_Nam);

            --  Verify that the external name is not the name of a local
            --  entity, which would hide the imported one and lead to
            --  run-time surprises. The problem can only arise for entities
            --  declared in a package body (otherwise the external name is
            --  fully qualified and won't conflict).

            declare
               Nam : Name_Id;
               E   : Entity_Id;
               Par : Node_Id;

            begin
               if Prag_Id = Pragma_Import then
                  String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
                  Nam := Name_Find;
                  E   := Entity_Id (Get_Name_Table_Info (Nam));

                  if Nam /= Chars (Subprogram_Def)
                    and then Present (E)
                    and then not Is_Overloadable (E)
                    and then Is_Immediately_Visible (E)
                    and then not Is_Imported (E)
                    and then Ekind (Scope (E)) = E_Package
                  then
                     Par := Parent (E);

                     while Present (Par) loop
                        if Nkind (Par) = N_Package_Body then
                           Error_Msg_Sloc  := Sloc (E);
                           Error_Msg_NE
                             ("imported entity is hidden by & declared#",
                                 Ext_Arg, E);
                           exit;
                        end if;

                        Par := Parent (Par);
                     end loop;
                  end if;
               end if;
            end;
         end if;

         if Present (Link_Nam) then
            Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
            Check_Form_Of_Interface_Name (Link_Nam);
         end if;

         --  If there is no link name, just set the external name

         if No (Link_Nam) then
            Set_Encoded_Interface_Name
              (Get_Base_Subprogram (Subprogram_Def),
               Adjust_External_Name_Case (Expr_Value_S (Ext_Nam)));

         --  For the Link_Name case, the given literal is preceded by an
         --  asterisk, which indicates to GCC that the given name should
         --  be taken literally, and in particular that no prepending of
         --  underlines should occur, even in systems where this is the
         --  normal default.

         else
            Start_String;
            Store_String_Char (Get_Char_Code ('*'));
            String_Val := Strval (Expr_Value_S (Link_Nam));

            for J in 1 .. String_Length (String_Val) loop
               Store_String_Char (Get_String_Char (String_Val, J));
            end loop;

            Link_Nam :=
              Make_String_Literal (Sloc (Link_Nam), End_String);

            Set_Encoded_Interface_Name
              (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
         end if;
      end Process_Interface_Name;

      -----------------------------------------
      -- Process_Interrupt_Or_Attach_Handler --
      -----------------------------------------

      procedure Process_Interrupt_Or_Attach_Handler is
         Arg1_X       : constant Node_Id   := Expression (Arg1);
         Handler_Proc : constant Entity_Id := Entity (Arg1_X);
         Proc_Scope   : constant Entity_Id := Scope (Handler_Proc);

      begin
         Set_Is_Interrupt_Handler (Handler_Proc);

         --  If the pragma is not associated with a handler procedure
         --  within a protected type, then it must be for a nonprotected
         --  procedure for the AAMP target, in which case we don't
         --  associate a representation item with the procedure's scope.

         if Ekind (Proc_Scope) = E_Protected_Type then
            if Prag_Id = Pragma_Interrupt_Handler
                 or else
               Prag_Id = Pragma_Attach_Handler
            then
               Record_Rep_Item (Proc_Scope, N);
            end if;
         end if;
      end Process_Interrupt_Or_Attach_Handler;

      --------------------------------------------------
      -- Process_Restrictions_Or_Restriction_Warnings --
      --------------------------------------------------

      procedure Process_Restrictions_Or_Restriction_Warnings is
         Arg   : Node_Id;
         R_Id  : Restriction_Id;
         Id    : Name_Id;
         Expr  : Node_Id;
         Val   : Uint;

         procedure Set_Warning (R : All_Restrictions);
         --  If this is a Restriction_Warnings pragma, set warning flag,
         --  otherwise reset the flag.

         -----------------
         -- Set_Warning --
         -----------------

         procedure Set_Warning (R : All_Restrictions) is
         begin
            if Prag_Id = Pragma_Restriction_Warnings then
               Restriction_Warnings (R) := True;
            else
               Restriction_Warnings (R) := False;
            end if;
         end Set_Warning;

      --  Start of processing for Process_Restrictions_Or_Restriction_Warnings

      begin
         Check_Ada_83_Warning;
         Check_At_Least_N_Arguments (1);
         Check_Valid_Configuration_Pragma;

         Arg := Arg1;
         while Present (Arg) loop
            Id := Chars (Arg);
            Expr := Expression (Arg);

            --  Case of no restriction identifier present

            if Id = No_Name then
               if Nkind (Expr) /= N_Identifier then
                  Error_Pragma_Arg
                    ("invalid form for restriction", Arg);
               end if;

               R_Id :=
                 Get_Restriction_Id
                   (Process_Restriction_Synonyms (Expr));

               if R_Id not in All_Boolean_Restrictions then
                  Error_Pragma_Arg
                    ("invalid restriction identifier", Arg);
               end if;

               if Implementation_Restriction (R_Id) then
                  Check_Restriction
                    (No_Implementation_Restrictions, Arg);
               end if;

               Set_Restriction (R_Id, N);
               Set_Warning (R_Id);

               --  A very special case that must be processed here:
               --  pragma Restrictions (No_Exceptions) turns off
               --  all run-time checking. This is a bit dubious in
               --  terms of the formal language definition, but it
               --  is what is intended by RM H.4(12).

               if R_Id = No_Exceptions then
                  Scope_Suppress := (others => True);
               end if;

            --  Case of restriction identifier present

            else
               R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Arg));
               Analyze_And_Resolve (Expr, Any_Integer);

               if R_Id not in All_Parameter_Restrictions then
                  Error_Pragma_Arg
                    ("invalid restriction parameter identifier", Arg);

               elsif not Is_OK_Static_Expression (Expr) then
                  Flag_Non_Static_Expr
                    ("value must be static expression!", Expr);
                  raise Pragma_Exit;

               elsif not Is_Integer_Type (Etype (Expr))
                 or else Expr_Value (Expr) < 0
               then
                  Error_Pragma_Arg
                    ("value must be non-negative integer", Arg);

                  --  Restriction pragma is active

               else
                  Val := Expr_Value (Expr);

                  if not UI_Is_In_Int_Range (Val) then
                     Error_Pragma_Arg
                       ("pragma ignored, value too large?", Arg);
                  else
                     Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
                     Set_Warning (R_Id);
                  end if;
               end if;
            end if;

            Next (Arg);
         end loop;
      end Process_Restrictions_Or_Restriction_Warnings;

      ---------------------------------
      -- Process_Suppress_Unsuppress --
      ---------------------------------

      --  Note: this procedure makes entries in the check suppress data
      --  structures managed by Sem. See spec of package Sem for full
      --  details on how we handle recording of check suppression.

      procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
         C    : Check_Id;
         E_Id : Node_Id;
         E    : Entity_Id;

         In_Package_Spec : constant Boolean :=
                             (Ekind (Current_Scope) = E_Package
                                or else
                              Ekind (Current_Scope) = E_Generic_Package)
                               and then not In_Package_Body (Current_Scope);

         procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
         --  Used to suppress a single check on the given entity

         --------------------------------
         -- Suppress_Unsuppress_Echeck --
         --------------------------------

         procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
            ESR : constant Entity_Check_Suppress_Record :=
                    (Entity   => E,
                     Check    => C,
                     Suppress => Suppress_Case);

         begin
            Set_Checks_May_Be_Suppressed (E);

            if In_Package_Spec then
               Global_Entity_Suppress.Append (ESR);
            else
               Local_Entity_Suppress.Append (ESR);
            end if;

            --  If this is a first subtype, and the base type is distinct,
            --  then also set the suppress flags on the base type.

            if Is_First_Subtype (E)
              and then Etype (E) /= E
            then
               Suppress_Unsuppress_Echeck (Etype (E), C);
            end if;
         end Suppress_Unsuppress_Echeck;

      --  Start of processing for Process_Suppress_Unsuppress

      begin
         --  Suppress/Unsuppress can appear as a configuration pragma,
         --  or in a declarative part or a package spec (RM 11.5(5))

         if not Is_Configuration_Pragma then
            Check_Is_In_Decl_Part_Or_Package_Spec;
         end if;

         Check_At_Least_N_Arguments (1);
         Check_At_Most_N_Arguments (2);
         Check_No_Identifier (Arg1);
         Check_Arg_Is_Identifier (Arg1);

         if not Is_Check_Name (Chars (Expression (Arg1))) then
            Error_Pragma_Arg
              ("argument of pragma% is not valid check name", Arg1);
         else
            C := Get_Check_Id (Chars (Expression (Arg1)));
         end if;

         if Arg_Count = 1 then

            --  Make an entry in the local scope suppress table. This is the
            --  table that directly shows the current value of the scope
            --  suppress check for any check id value.

            if C = All_Checks then
               for J in Scope_Suppress'Range loop
                  Scope_Suppress (J) := Suppress_Case;
               end loop;
            else
               Scope_Suppress (C) := Suppress_Case;
            end if;

            --  Also make an entry in the Local_Entity_Suppress table. See
            --  extended description in the package spec of Sem for details.

            Local_Entity_Suppress.Append
              ((Entity   => Empty,
                Check    => C,
                Suppress => Suppress_Case));

         --  Case of two arguments present, where the check is
         --  suppressed for a specified entity (given as the second
         --  argument of the pragma)

         else
            Check_Optional_Identifier (Arg2, Name_On);
            E_Id := Expression (Arg2);
            Analyze (E_Id);

            if not Is_Entity_Name (E_Id) then
               Error_Pragma_Arg
                 ("second argument of pragma% must be entity name", Arg2);
            end if;

            E := Entity (E_Id);

            if E = Any_Id then
               return;
            end if;

            --  Enforce RM 11.5(7) which requires that for a pragma that
            --  appears within a package spec, the named entity must be
            --  within the package spec. We allow the package name itself
            --  to be mentioned since that makes sense, although it is not
            --  strictly allowed by 11.5(7).

            if In_Package_Spec
              and then E /= Current_Scope
              and then Scope (E) /= Current_Scope
            then
               Error_Pragma_Arg
                 ("entity in pragma% is not in package spec ('R'M 11.5(7))",
                  Arg2);
            end if;

            --  Loop through homonyms. As noted below, in the case of a package
            --  spec, only homonyms within the package spec are considered.

            loop
               Suppress_Unsuppress_Echeck (E, C);

               if Is_Generic_Instance (E)
                 and then Is_Subprogram (E)
                 and then Present (Alias (E))
               then
                  Suppress_Unsuppress_Echeck (Alias (E), C);
               end if;

               --  Move to next homonym

               E := Homonym (E);
               exit when No (E);

               --  If we are within a package specification, the
               --  pragma only applies to homonyms in the same scope.

               exit when In_Package_Spec
                 and then Scope (E) /= Current_Scope;
            end loop;
         end if;
      end Process_Suppress_Unsuppress;

      ------------------
      -- Set_Exported --
      ------------------

      procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
      begin
         if Is_Imported (E) then
            Error_Pragma_Arg
              ("cannot export entity& that was previously imported", Arg);

         elsif Present (Address_Clause (E)) then
            Error_Pragma_Arg
              ("cannot export entity& that has an address clause", Arg);
         end if;

         Set_Is_Exported (E);

         --  Generate a reference for entity explicitly, because the
         --  identifier may be overloaded and name resolution will not
         --  generate one.

         Generate_Reference (E, Arg);

         --  Deal with exporting non-library level entity

         if not Is_Library_Level_Entity (E) then

            --  Not allowed at all for subprograms

            if Is_Subprogram (E) then
               Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);

            --  Otherwise set public and statically allocated

            else
               Set_Is_Public (E);
               Set_Is_Statically_Allocated (E);

               --  Warn if the corresponding W flag is set and the pragma
               --  comes from source. The latter may not be true e.g. on
               --  VMS where we expand export pragmas for exception codes
               --  associated with imported or exported exceptions. We do
               --  not want to generate a warning for something that the
               --  user did not write.

               if Warn_On_Export_Import
                 and then Comes_From_Source (Arg)
               then
                  Error_Msg_NE
                    ("?& has been made static as a result of Export", Arg, E);
                  Error_Msg_N
                    ("\this usage is non-standard and non-portable", Arg);
               end if;
            end if;
         end if;

         if Warn_On_Export_Import and then Is_Type (E) then
            Error_Msg_NE
              ("exporting a type has no effect?", Arg, E);
         end if;

         if Warn_On_Export_Import and Inside_A_Generic then
            Error_Msg_NE
              ("all instances of& will have the same external name?", Arg, E);
         end if;
      end Set_Exported;

      ----------------------------------------------
      -- Set_Extended_Import_Export_External_Name --
      ----------------------------------------------

      procedure Set_Extended_Import_Export_External_Name
        (Internal_Ent : Entity_Id;
         Arg_External : Node_Id)
      is
         Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
         New_Name : Node_Id;

      begin
         if No (Arg_External) then
            return;
         end if;

         Check_Arg_Is_External_Name (Arg_External);

         if Nkind (Arg_External) = N_String_Literal then
            if String_Length (Strval (Arg_External)) = 0 then
               return;
            else
               New_Name := Adjust_External_Name_Case (Arg_External);
            end if;

         elsif Nkind (Arg_External) = N_Identifier then
            New_Name := Get_Default_External_Name (Arg_External);

         --  Check_Arg_Is_External_Name should let through only
         --  identifiers and string literals or static string
         --  expressions (which are folded to string literals).

         else
            raise Program_Error;
         end if;

         --  If we already have an external name set (by a prior normal
         --  Import or Export pragma), then the external names must match

         if Present (Interface_Name (Internal_Ent)) then
            declare
               S1 : constant String_Id := Strval (Old_Name);
               S2 : constant String_Id := Strval (New_Name);

               procedure Mismatch;
               --  Called if names do not match

               procedure Mismatch is
               begin
                  Error_Msg_Sloc := Sloc (Old_Name);
                  Error_Pragma_Arg
                    ("external name does not match that given #",
                     Arg_External);
               end Mismatch;

            begin
               if String_Length (S1) /= String_Length (S2) then
                  Mismatch;

               else
                  for J in 1 .. String_Length (S1) loop
                     if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
                        Mismatch;
                     end if;
                  end loop;
               end if;
            end;

         --  Otherwise set the given name

         else
            Set_Encoded_Interface_Name (Internal_Ent, New_Name);
         end if;

      end Set_Extended_Import_Export_External_Name;

      ------------------
      -- Set_Imported --
      ------------------

      procedure Set_Imported (E : Entity_Id) is
      begin
         Error_Msg_Sloc  := Sloc (E);

         if Is_Exported (E) or else Is_Imported (E) then
            Error_Msg_NE ("import of& declared# not allowed", N, E);

            if Is_Exported (E) then
               Error_Msg_N ("\entity was previously exported", N);
            else
               Error_Msg_N ("\entity was previously imported", N);
            end if;

            Error_Pragma ("\(pragma% applies to all previous entities)");

         else
            Set_Is_Imported (E);

            --  If the entity is an object that is not at the library
            --  level, then it is statically allocated. We do not worry
            --  about objects with address clauses in this context since
            --  they are not really imported in the linker sense.

            if Is_Object (E)
              and then not Is_Library_Level_Entity (E)
              and then No (Address_Clause (E))
            then
               Set_Is_Statically_Allocated (E);
            end if;
         end if;
      end Set_Imported;

      -------------------------
      -- Set_Mechanism_Value --
      -------------------------

      --  Note: the mechanism name has not been analyzed (and cannot indeed
      --  be analyzed, since it is semantic nonsense), so we get it in the
      --  exact form created by the parser.

      procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
         Class : Node_Id;
         Param : Node_Id;

         procedure Bad_Class;
         --  Signal bad descriptor class name

         procedure Bad_Mechanism;
         --  Signal bad mechanism name

         procedure Bad_Class is
         begin
            Error_Pragma_Arg ("unrecognized descriptor class name", Class);
         end Bad_Class;

         procedure Bad_Mechanism is
         begin
            Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
         end Bad_Mechanism;

      --  Start of processing for Set_Mechanism_Value

      begin
         if Mechanism (Ent) /= Default_Mechanism then
            Error_Msg_NE
              ("mechanism for & has already been set", Mech_Name, Ent);
         end if;

         --  MECHANISM_NAME ::= value | reference | descriptor

         if Nkind (Mech_Name) = N_Identifier then
            if Chars (Mech_Name) = Name_Value then
               Set_Mechanism (Ent, By_Copy);
               return;

            elsif Chars (Mech_Name) = Name_Reference then
               Set_Mechanism (Ent, By_Reference);
               return;

            elsif Chars (Mech_Name) = Name_Descriptor then
               Check_VMS (Mech_Name);
               Set_Mechanism (Ent, By_Descriptor);
               return;

            elsif Chars (Mech_Name) = Name_Copy then
               Error_Pragma_Arg
                 ("bad mechanism name, Value assumed", Mech_Name);

            else
               Bad_Mechanism;
            end if;

         --  MECHANISM_NAME ::= descriptor (CLASS_NAME)
         --  CLASS_NAME     ::= ubs | ubsb | uba | s | sb | a | nca

         --  Note: this form is parsed as an indexed component

         elsif Nkind (Mech_Name) = N_Indexed_Component then
            Class := First (Expressions (Mech_Name));

            if Nkind (Prefix (Mech_Name)) /= N_Identifier
              or else Chars (Prefix (Mech_Name)) /= Name_Descriptor
              or else Present (Next (Class))
            then
               Bad_Mechanism;
            end if;

         --  MECHANISM_NAME ::= descriptor (Class => CLASS_NAME)
         --  CLASS_NAME     ::= ubs | ubsb | uba | s | sb | a | nca

         --  Note: this form is parsed as a function call

         elsif Nkind (Mech_Name) = N_Function_Call then

            Param := First (Parameter_Associations (Mech_Name));

            if Nkind (Name (Mech_Name)) /= N_Identifier
              or else Chars (Name (Mech_Name)) /= Name_Descriptor
              or else Present (Next (Param))
              or else No (Selector_Name (Param))
              or else Chars (Selector_Name (Param)) /= Name_Class
            then
               Bad_Mechanism;
            else
               Class := Explicit_Actual_Parameter (Param);
            end if;

         else
            Bad_Mechanism;
         end if;

         --  Fall through here with Class set to descriptor class name

         Check_VMS (Mech_Name);

         if Nkind (Class) /= N_Identifier then
            Bad_Class;

         elsif Chars (Class) = Name_UBS then
            Set_Mechanism (Ent, By_Descriptor_UBS);

         elsif Chars (Class) = Name_UBSB then
            Set_Mechanism (Ent, By_Descriptor_UBSB);

         elsif Chars (Class) = Name_UBA then
            Set_Mechanism (Ent, By_Descriptor_UBA);

         elsif Chars (Class) = Name_S then
            Set_Mechanism (Ent, By_Descriptor_S);

         elsif Chars (Class) = Name_SB then
            Set_Mechanism (Ent, By_Descriptor_SB);

         elsif Chars (Class) = Name_A then
            Set_Mechanism (Ent, By_Descriptor_A);

         elsif Chars (Class) = Name_NCA then
            Set_Mechanism (Ent, By_Descriptor_NCA);

         else
            Bad_Class;
         end if;

      end Set_Mechanism_Value;

      ---------------------------
      -- Set_Ravenscar_Profile --
      ---------------------------

      --  The tasks to be done here are

      --    Set required policies

      --      pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
      --      pragma Locking_Policy (Ceiling_Locking)

      --    Set Detect_Blocking mode

      --    Set required restrictions (see System.Rident for detailed list)

      procedure Set_Ravenscar_Profile (N : Node_Id) is
      begin
         --  pragma Task_Dispatching_Policy (FIFO_Within_Priorities)

         if Task_Dispatching_Policy /= ' '
           and then Task_Dispatching_Policy /= 'F'
         then
            Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
            Error_Pragma ("Profile (Ravenscar) incompatible with policy#");

         --  Set the FIFO_Within_Priorities policy, but always
         --  preserve System_Location since we like the error
         --  message with the run time name.

         else
            Task_Dispatching_Policy := 'F';

            if Task_Dispatching_Policy_Sloc /= System_Location then
               Task_Dispatching_Policy_Sloc := Loc;
            end if;
         end if;

         --  pragma Locking_Policy (Ceiling_Locking)

         if Locking_Policy /= ' '
           and then Locking_Policy /= 'C'
         then
            Error_Msg_Sloc := Locking_Policy_Sloc;
            Error_Pragma ("Profile (Ravenscar) incompatible with policy#");

         --  Set the Ceiling_Locking policy, but always preserve
         --  System_Location since we like the error message with the
         --  run time name.

         else
            Locking_Policy := 'C';

            if Locking_Policy_Sloc /= System_Location then
               Locking_Policy_Sloc := Loc;
            end if;
         end if;

         --  pragma Detect_Blocking

         Detect_Blocking := True;

         --  Set the corresponding restrictions

         Set_Profile_Restrictions (Ravenscar, N, Warn => False);
      end Set_Ravenscar_Profile;

   --  Start of processing for Analyze_Pragma

   begin
      if not Is_Pragma_Name (Chars (N)) then
         if Warn_On_Unrecognized_Pragma then
            Error_Pragma ("unrecognized pragma%!?");
         else
            raise Pragma_Exit;
         end if;
      else
         Prag_Id := Get_Pragma_Id (Chars (N));
      end if;

      --  Preset arguments

      Arg1 := Empty;
      Arg2 := Empty;
      Arg3 := Empty;
      Arg4 := Empty;

      if Present (Pragma_Argument_Associations (N)) then
         Arg1 := First (Pragma_Argument_Associations (N));

         if Present (Arg1) then
            Arg2 := Next (Arg1);

            if Present (Arg2) then
               Arg3 := Next (Arg2);

               if Present (Arg3) then
                  Arg4 := Next (Arg3);
               end if;
            end if;
         end if;
      end if;

      --  Count number of arguments

      declare
         Arg_Node : Node_Id;
      begin
         Arg_Count := 0;
         Arg_Node := Arg1;
         while Present (Arg_Node) loop
            Arg_Count := Arg_Count + 1;
            Next (Arg_Node);
         end loop;
      end;

      --  An enumeration type defines the pragmas that are supported by the
      --  implementation. Get_Pragma_Id (in package Prag) transorms a name
      --  into the corresponding enumeration value for the following case.

      case Prag_Id is

         -----------------
         -- Abort_Defer --
         -----------------

         --  pragma Abort_Defer;

         when Pragma_Abort_Defer =>
            GNAT_Pragma;
            Check_Arg_Count (0);

            --  The only required semantic processing is to check the
            --  placement. This pragma must appear at the start of the
            --  statement sequence of a handled sequence of statements.

            if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
              or else N /= First (Statements (Parent (N)))
            then
               Pragma_Misplaced;
            end if;

         ------------
         -- Ada_83 --
         ------------

         --  pragma Ada_83;

         --  Note: this pragma also has some specific processing in Par.Prag
         --  because we want to set the Ada version mode during parsing.

         when Pragma_Ada_83 =>
            GNAT_Pragma;
            Ada_Version := Ada_83;
            Check_Arg_Count (0);

         ------------
         -- Ada_95 --
         ------------

         --  pragma Ada_95;

         --  Note: this pragma also has some specific processing in Par.Prag
         --  because we want to set the Ada 83 version mode during parsing.

         when Pragma_Ada_95 =>
            GNAT_Pragma;
            Ada_Version := Ada_95;
            Check_Arg_Count (0);

         ------------
         -- Ada_05 --
         ------------

         --  pragma Ada_05;

         --  Note: this pragma also has some specific processing in Par.Prag
         --  because we want to set the Ada 83 version mode during parsing.

         when Pragma_Ada_05 =>
            GNAT_Pragma;
            Ada_Version := Ada_05;
            Check_Arg_Count (0);

         ----------------------
         -- All_Calls_Remote --
         ----------------------

         --  pragma All_Calls_Remote [(library_package_NAME)];

         when Pragma_All_Calls_Remote => All_Calls_Remote : declare
            Lib_Entity : Entity_Id;

         begin
            Check_Ada_83_Warning;
            Check_Valid_Library_Unit_Pragma;

            if Nkind (N) = N_Null_Statement then
               return;
            end if;

            Lib_Entity := Find_Lib_Unit_Name;

            --  This pragma should only apply to a RCI unit (RM E.2.3(23)).

            if Present (Lib_Entity)
              and then not Debug_Flag_U
            then
               if not Is_Remote_Call_Interface (Lib_Entity) then
                  Error_Pragma ("pragma% only apply to rci unit");

               --  Set flag for entity of the library unit

               else
                  Set_Has_All_Calls_Remote (Lib_Entity);
               end if;

            end if;
         end All_Calls_Remote;

         --------------
         -- Annotate --
         --------------

         --  pragma Annotate (IDENTIFIER {, ARG});
         --  ARG ::= NAME | EXPRESSION

         when Pragma_Annotate => Annotate : begin
            GNAT_Pragma;
            Check_At_Least_N_Arguments (1);
            Check_Arg_Is_Identifier (Arg1);

            declare
               Arg : Node_Id := Arg2;
               Exp : Node_Id;

            begin
               while Present (Arg) loop
                  Exp := Expression (Arg);
                  Analyze (Exp);

                  if Is_Entity_Name (Exp) then
                     null;

                  elsif Nkind (Exp) = N_String_Literal then
                     Resolve (Exp, Standard_String);

                  elsif Is_Overloaded (Exp) then
                     Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);

                  else
                     Resolve (Exp);
                  end if;

                  Next (Arg);
               end loop;
            end;
         end Annotate;

         ------------
         -- Assert --
         ------------

         --  pragma Assert (Boolean_EXPRESSION [, static_string_EXPRESSION]);

         when Pragma_Assert =>
            GNAT_Pragma;
            Check_No_Identifiers;

            if Arg_Count > 1 then
               Check_Arg_Count (2);
               Check_Arg_Is_Static_Expression (Arg2, Standard_String);
            end if;

            --  If expansion is active and assertions are inactive, then
            --  we rewrite the Assertion as:

            --    if False and then condition then
            --       null;
            --    end if;

            --  The reason we do this rewriting during semantic analysis
            --  rather than as part of normal expansion is that we cannot
            --  analyze and expand the code for the boolean expression
            --  directly, or it may cause insertion of actions that would
            --  escape the attempt to suppress the assertion code.

            if Expander_Active and not Assertions_Enabled then
               Rewrite (N,
                 Make_If_Statement (Loc,
                   Condition =>
                     Make_And_Then (Loc,
                       Left_Opnd  => New_Occurrence_Of (Standard_False, Loc),
                       Right_Opnd => Get_Pragma_Arg (Arg1)),
                   Then_Statements => New_List (
                     Make_Null_Statement (Loc))));

               Analyze (N);

            --  Otherwise (if assertions are enabled, or if we are not
            --  operating with expansion active), then we just analyze
            --  and resolve the expression.

            else
               Analyze_And_Resolve (Expression (Arg1), Any_Boolean);
            end if;

         ---------------
         -- AST_Entry --
         ---------------

         --  pragma AST_Entry (entry_IDENTIFIER);

         when Pragma_AST_Entry => AST_Entry : declare
            Ent : Node_Id;

         begin
            GNAT_Pragma;
            Check_VMS (N);
            Check_Arg_Count (1);
            Check_No_Identifiers;
            Check_Arg_Is_Local_Name (Arg1);
            Ent := Entity (Expression (Arg1));

            --  Note: the implementation of the AST_Entry pragma could handle
            --  the entry family case fine, but for now we are consistent with
            --  the DEC rules, and do not allow the pragma, which of course
            --  has the effect of also forbidding the attribute.

            if Ekind (Ent) /= E_Entry then
               Error_Pragma_Arg
                 ("pragma% argument must be simple entry name", Arg1);

            elsif Is_AST_Entry (Ent) then
               Error_Pragma_Arg
                 ("duplicate % pragma for entry", Arg1);

            elsif Has_Homonym (Ent) then
               Error_Pragma_Arg
                 ("pragma% argument cannot specify overloaded entry", Arg1);

            else
               declare
                  FF : constant Entity_Id := First_Formal (Ent);

               begin
                  if Present (FF) then
                     if Present (Next_Formal (FF)) then
                        Error_Pragma_Arg
                          ("entry for pragma% can have only one argument",
                           Arg1);

                     elsif Parameter_Mode (FF) /= E_In_Parameter then
                        Error_Pragma_Arg
                          ("entry parameter for pragma% must have mode IN",
                           Arg1);
                     end if;
                  end if;
               end;

               Set_Is_AST_Entry (Ent);
            end if;
         end AST_Entry;

         ------------------
         -- Asynchronous --
         ------------------

         --  pragma Asynchronous (LOCAL_NAME);

         when Pragma_Asynchronous => Asynchronous : declare
            Nm     : Entity_Id;
            C_Ent  : Entity_Id;
            L      : List_Id;
            S      : Node_Id;
            N      : Node_Id;
            Formal : Entity_Id;

            procedure Process_Async_Pragma;
            --  Common processing for procedure and access-to-procedure case

            --------------------------
            -- Process_Async_Pragma --
            --------------------------

            procedure Process_Async_Pragma is
            begin
               if not Present (L) then
                  Set_Is_Asynchronous (Nm);
                  return;
               end if;

               --  The formals should be of mode IN (RM E.4.1(6))

               S := First (L);
               while Present (S) loop
                  Formal := Defining_Identifier (S);

                  if Nkind (Formal) = N_Defining_Identifier
                    and then Ekind (Formal) /= E_In_Parameter
                  then
                     Error_Pragma_Arg
                       ("pragma% procedure can only have IN parameter",
                        Arg1);
                  end if;

                  Next (S);
               end loop;

               Set_Is_Asynchronous (Nm);
            end Process_Async_Pragma;

         --  Start of processing for pragma Asynchronous

         begin
            Check_Ada_83_Warning;
            Check_No_Identifiers;
            Check_Arg_Count (1);
            Check_Arg_Is_Local_Name (Arg1);

            if Debug_Flag_U then
               return;
            end if;

            C_Ent := Cunit_Entity (Current_Sem_Unit);
            Analyze (Expression (Arg1));
            Nm := Entity (Expression (Arg1));

            if not Is_Remote_Call_Interface (C_Ent)
              and then not Is_Remote_Types (C_Ent)
            then
               --  This pragma should only appear in an RCI or Remote Types
               --  unit (RM E.4.1(4))

               Error_Pragma
                 ("pragma% not in Remote_Call_Interface or " &
                  "Remote_Types unit");
            end if;

            if Ekind (Nm) = E_Procedure
              and then Nkind (Parent (Nm)) = N_Procedure_Specification
            then
               if not Is_Remote_Call_Interface (Nm) then
                  Error_Pragma_Arg
                    ("pragma% cannot be applied on non-remote procedure",
                     Arg1);
               end if;

               L := Parameter_Specifications (Parent (Nm));
               Process_Async_Pragma;
               return;

            elsif Ekind (Nm) = E_Function then
               Error_Pragma_Arg
                 ("pragma% cannot be applied to function", Arg1);

            elsif Ekind (Nm) = E_Record_Type
              and then Present (Corresponding_Remote_Type (Nm))
            then
               N := Declaration_Node (Corresponding_Remote_Type (Nm));

               if Nkind (N) = N_Full_Type_Declaration
                 and then Nkind (Type_Definition (N)) =
                                     N_Access_Procedure_Definition
               then
                  L := Parameter_Specifications (Type_Definition (N));
                  Process_Async_Pragma;

               else
                  Error_Pragma_Arg
                    ("pragma% cannot reference access-to-function type",
                    Arg1);
               end if;

            --  Only other possibility is Access-to-class-wide type

            elsif Is_Access_Type (Nm)
              and then Is_Class_Wide_Type (Designated_Type (Nm))
            then
               Check_First_Subtype (Arg1);
               Set_Is_Asynchronous (Nm);
               if Expander_Active then
                  RACW_Type_Is_Asynchronous (Nm);
               end if;

            else
               Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
            end if;
         end Asynchronous;

         ------------
         -- Atomic --
         ------------

         --  pragma Atomic (LOCAL_NAME);

         when Pragma_Atomic =>
            Process_Atomic_Shared_Volatile;

         -----------------------
         -- Atomic_Components --
         -----------------------

         --  pragma Atomic_Components (array_LOCAL_NAME);

         --  This processing is shared by Volatile_Components

         when Pragma_Atomic_Components   |
              Pragma_Volatile_Components =>

         Atomic_Components : declare
            E_Id : Node_Id;
            E    : Entity_Id;
            D    : Node_Id;
            K    : Node_Kind;

         begin
            Check_Ada_83_Warning;
            Check_No_Identifiers;
            Check_Arg_Count (1);
            Check_Arg_Is_Local_Name (Arg1);
            E_Id := Expression (Arg1);

            if Etype (E_Id) = Any_Type then
               return;
            end if;

            E := Entity (E_Id);

            if Rep_Item_Too_Early (E, N)
                 or else
               Rep_Item_Too_Late (E, N)
            then
               return;
            end if;

            D := Declaration_Node (E);
            K := Nkind (D);

            if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
              or else
                ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
                   and then Nkind (D) = N_Object_Declaration
                   and then Nkind (Object_Definition (D)) =
                                       N_Constrained_Array_Definition)
            then
               --  The flag is set on the object, or on the base type

               if Nkind (D) /= N_Object_Declaration then
                  E := Base_Type (E);
               end if;

               Set_Has_Volatile_Components (E);

               if Prag_Id = Pragma_Atomic_Components then
                  Set_Has_Atomic_Components (E);

                  if Is_Packed (E) then
                     Set_Is_Packed (E, False);

                     Error_Pragma_Arg
                       ("?Pack canceled, cannot pack atomic components",
                        Arg1);
                  end if;
               end if;

            else
               Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
            end if;
         end Atomic_Components;

         --------------------
         -- Attach_Handler --
         --------------------

         --  pragma Attach_Handler (handler_NAME, EXPRESSION);

         when Pragma_Attach_Handler =>
            Check_Ada_83_Warning;
            Check_No_Identifiers;
            Check_Arg_Count (2);

            if No_Run_Time_Mode then
               Error_Msg_CRT ("Attach_Handler pragma", N);
            else
               Check_Interrupt_Or_Attach_Handler;

               --  The expression that designates the attribute may
               --  depend on a discriminant, and is therefore a per-
               --  object expression, to be expanded in the init proc.
               --  If expansion is enabled, perform semantic checks
               --  on a copy only.

               if Expander_Active then
                  declare
                     Temp : constant Node_Id :=
                              New_Copy_Tree (Expression (Arg2));
                  begin
                     Set_Parent (Temp, N);
                     Pre_Analyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
                  end;

               else
                  Analyze (Expression (Arg2));
                  Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
               end if;

               Process_Interrupt_Or_Attach_Handler;
            end if;

         --------------------
         -- C_Pass_By_Copy --
         --------------------

         --  pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);

         when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
            Arg : Node_Id;
            Val : Uint;

         begin
            GNAT_Pragma;
            Check_Valid_Configuration_Pragma;
            Check_Arg_Count (1);
            Check_Optional_Identifier (Arg1, "max_size");

            Arg := Expression (Arg1);
            Check_Arg_Is_Static_Expression (Arg, Any_Integer);

            Val := Expr_Value (Arg);

            if Val <= 0 then
               Error_Pragma_Arg
                 ("maximum size for pragma% must be positive", Arg1);

            elsif UI_Is_In_Int_Range (Val) then
               Default_C_Record_Mechanism := UI_To_Int (Val);

            --  If a giant value is given, Int'Last will do well enough.
            --  If sometime someone complains that a record larger than
            --  two gigabytes is not copied, we will worry about it then!

            else
               Default_C_Record_Mechanism := Mechanism_Type'Last;
            end if;
         end C_Pass_By_Copy;

         -------------
         -- Comment --
         -------------

         --  pragma Comment (static_string_EXPRESSION)

         --  Processing for pragma Comment shares the circuitry for
         --  pragma Ident. The only differences are that Ident enforces
         --  a limit of 31 characters on its argument, and also enforces
         --  limitations on placement for DEC compatibility. Pragma
         --  Comment shares neither of these restrictions.

         -------------------
         -- Common_Object --
         -------------------

         --  pragma Common_Object (
         --        [Internal =>] LOCAL_NAME,
         --     [, [External =>] EXTERNAL_SYMBOL]
         --     [, [Size     =>] EXTERNAL_SYMBOL]);

         --  Processing for this pragma is shared with Psect_Object

         --------------------------
         -- Compile_Time_Warning --
         --------------------------

         --  pragma Compile_Time_Warning
         --    (boolean_EXPRESSION, static_string_EXPRESSION);

         when Pragma_Compile_Time_Warning => Compile_Time_Warning : declare
            Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);

         begin
            GNAT_Pragma;
            Check_Arg_Count (2);
            Check_No_Identifiers;
            Check_Arg_Is_Static_Expression (Arg2, Standard_String);
            Analyze_And_Resolve (Arg1x, Standard_Boolean);

            if Compile_Time_Known_Value (Arg1x) then
               if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
                  String_To_Name_Buffer (Strval (Get_Pragma_Arg (Arg2)));
                  Add_Char_To_Name_Buffer ('?');

                  declare
                     Msg : String (1 .. Name_Len) :=
                             Name_Buffer (1 .. Name_Len);

                     B : Natural;

                  begin
                     --  This loop looks for multiple lines separated by
                     --  ASCII.LF and breaks them into continuation error
                     --  messages marked with the usual back slash.

                     B := 1;
                     for S in 2 .. Msg'Length - 1 loop
                        if Msg (S) = ASCII.LF then
                           Msg (S) := '?';
                           Error_Msg_N (Msg (B .. S), Arg1);
                           B := S;
                           Msg (B) := '\';
                        end if;
                     end loop;

                     Error_Msg_N (Msg (B .. Msg'Length), Arg1);
                  end;
               end if;
            end if;
         end Compile_Time_Warning;

         ----------------------------
         -- Complex_Representation --
         ----------------------------

         --  pragma Complex_Representation ([Entity =>] LOCAL_NAME);

         when Pragma_Complex_Representation => Complex_Representation : declare
            E_Id : Entity_Id;
            E    : Entity_Id;
            Ent  : Entity_Id;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Arg_Is_Local_Name (Arg1);
            E_Id := Expression (Arg1);

            if Etype (E_Id) = Any_Type then
               return;
            end if;

            E := Entity (E_Id);

            if not Is_Record_Type (E) then
               Error_Pragma_Arg
                 ("argument for pragma% must be record type", Arg1);
            end if;

            Ent := First_Entity (E);

            if No (Ent)
              or else No (Next_Entity (Ent))
              or else Present (Next_Entity (Next_Entity (Ent)))
              or else not Is_Floating_Point_Type (Etype (Ent))
              or else Etype (Ent) /= Etype (Next_Entity (Ent))
            then
               Error_Pragma_Arg
                 ("record for pragma% must have two fields of same fpt type",
                  Arg1);

            else
               Set_Has_Complex_Representation (Base_Type (E));
            end if;
         end Complex_Representation;

         -------------------------
         -- Component_Alignment --
         -------------------------

         --  pragma Component_Alignment (
         --        [Form =>] ALIGNMENT_CHOICE
         --     [, [Name =>] type_LOCAL_NAME]);
         --
         --   ALIGNMENT_CHOICE ::=
         --     Component_Size
         --   | Component_Size_4
         --   | Storage_Unit
         --   | Default

         when Pragma_Component_Alignment => Component_AlignmentP : declare
            Args  : Args_List (1 .. 2);
            Names : constant Name_List (1 .. 2) := (
                      Name_Form,
                      Name_Name);

            Form  : Node_Id renames Args (1);
            Name  : Node_Id renames Args (2);

            Atype : Component_Alignment_Kind;
            Typ   : Entity_Id;

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);

            if No (Form) then
               Error_Pragma ("missing Form argument for pragma%");
            end if;

            Check_Arg_Is_Identifier (Form);

            --  Get proper alignment, note that Default = Component_Size
            --  on all machines we have so far, and we want to set this
            --  value rather than the default value to indicate that it
            --  has been explicitly set (and thus will not get overridden
            --  by the default component alignment for the current scope)

            if Chars (Form) = Name_Component_Size then
               Atype := Calign_Component_Size;

            elsif Chars (Form) = Name_Component_Size_4 then
               Atype := Calign_Component_Size_4;

            elsif Chars (Form) = Name_Default then
               Atype := Calign_Component_Size;

            elsif Chars (Form) = Name_Storage_Unit then
               Atype := Calign_Storage_Unit;

            else
               Error_Pragma_Arg
                 ("invalid Form parameter for pragma%", Form);
            end if;

            --  Case with no name, supplied, affects scope table entry

            if No (Name) then
               Scope_Stack.Table
                 (Scope_Stack.Last).Component_Alignment_Default := Atype;

            --  Case of name supplied

            else
               Check_Arg_Is_Local_Name (Name);
               Find_Type (Name);
               Typ := Entity (Name);

               if Typ = Any_Type
                 or else Rep_Item_Too_Early (Typ, N)
               then
                  return;
               else
                  Typ := Underlying_Type (Typ);
               end if;

               if not Is_Record_Type (Typ)
                 and then not Is_Array_Type (Typ)
               then
                  Error_Pragma_Arg
                    ("Name parameter of pragma% must identify record or " &
                     "array type", Name);
               end if;

               --  An explicit Component_Alignment pragma overrides an
               --  implicit pragma Pack, but not an explicit one.

               if not Has_Pragma_Pack (Base_Type (Typ)) then
                  Set_Is_Packed (Base_Type (Typ), False);
                  Set_Component_Alignment (Base_Type (Typ), Atype);
               end if;
            end if;
         end Component_AlignmentP;

         ----------------
         -- Controlled --
         ----------------

         --  pragma Controlled (first_subtype_LOCAL_NAME);

         when Pragma_Controlled => Controlled : declare
            Arg : Node_Id;

         begin
            Check_No_Identifiers;
            Check_Arg_Count (1);
            Check_Arg_Is_Local_Name (Arg1);
            Arg := Expression (Arg1);

            if not Is_Entity_Name (Arg)
              or else not Is_Access_Type (Entity (Arg))
            then
               Error_Pragma_Arg ("pragma% requires access type", Arg1);
            else
               Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
            end if;
         end Controlled;

         ----------------
         -- Convention --
         ----------------

         --  pragma Convention ([Convention =>] convention_IDENTIFIER,
         --    [Entity =>] LOCAL_NAME);

         when Pragma_Convention => Convention : declare
            C : Convention_Id;
            E : Entity_Id;
         begin
            Check_Ada_83_Warning;
            Check_Arg_Count (2);
            Process_Convention (C, E);
         end Convention;

         ---------------------------
         -- Convention_Identifier --
         ---------------------------

         --  pragma Convention_Identifier ([Name =>] IDENTIFIER,
         --    [Convention =>] convention_IDENTIFIER);

         when Pragma_Convention_Identifier => Convention_Identifier : declare
            Idnam : Name_Id;
            Cname : Name_Id;

         begin
            GNAT_Pragma;
            Check_Arg_Count (2);
            Check_Optional_Identifier (Arg1, Name_Name);
            Check_Optional_Identifier (Arg2, Name_Convention);
            Check_Arg_Is_Identifier (Arg1);
            Check_Arg_Is_Identifier (Arg1);
            Idnam := Chars (Expression (Arg1));
            Cname := Chars (Expression (Arg2));

            if Is_Convention_Name (Cname) then
               Record_Convention_Identifier
                 (Idnam, Get_Convention_Id (Cname));
            else
               Error_Pragma_Arg
                 ("second arg for % pragma must be convention", Arg2);
            end if;
         end Convention_Identifier;

         ---------------
         -- CPP_Class --
         ---------------

         --  pragma CPP_Class ([Entity =>] local_NAME)

         when Pragma_CPP_Class => CPP_Class : declare
            Arg         : Node_Id;
            Typ         : Entity_Id;
            Default_DTC : Entity_Id := Empty;
            VTP_Type    : constant Entity_Id  := RTE (RE_Vtable_Ptr);
            C           : Entity_Id;
            Tag_C       : Entity_Id;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Arg_Is_Local_Name (Arg1);

            Arg := Expression (Arg1);
            Analyze (Arg);

            if Etype (Arg) = Any_Type then
               return;
            end if;

            if not Is_Entity_Name (Arg)
              or else not Is_Type (Entity (Arg))
            then
               Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
            end if;

            Typ := Entity (Arg);

            if not Is_Record_Type (Typ) then
               Error_Pragma_Arg ("pragma% applicable to a record, "
                 & "tagged record or record extension", Arg1);
            end if;

            Default_DTC := First_Component (Typ);
            while Present (Default_DTC)
              and then Etype (Default_DTC) /= VTP_Type
            loop
               Next_Component (Default_DTC);
            end loop;

            --  Case of non tagged type

            if not Is_Tagged_Type (Typ) then
               Set_Is_CPP_Class (Typ);

               if Present (Default_DTC) then
                  Error_Pragma_Arg
                    ("only tagged records can contain vtable pointers", Arg1);
               end if;

            --  Case of tagged type with no vtable ptr

            --  What is test for Typ = Root_Typ (Typ) about here ???

            elsif Is_Tagged_Type (Typ)
              and then Typ = Root_Type (Typ)
              and then No (Default_DTC)
            then
               Error_Pragma_Arg
                 ("a cpp_class must contain a vtable pointer", Arg1);

            --  Tagged type that has a vtable ptr

            elsif Present (Default_DTC) then
               Set_Is_CPP_Class (Typ);
               Set_Is_Limited_Record (Typ);
               Set_Is_Tag (Default_DTC);
               Set_DT_Entry_Count (Default_DTC, No_Uint);

               --  Since a CPP type has no direct link to its associated tag
               --  most tags checks cannot be performed

               Set_Kill_Tag_Checks (Typ);
               Set_Kill_Tag_Checks (Class_Wide_Type (Typ));

               --  Get rid of the _tag component when there was one.
               --  It is only useful for regular tagged types

               if Expander_Active and then Typ = Root_Type (Typ) then

                  Tag_C := Tag_Component (Typ);
                  C := First_Entity (Typ);

                  if C = Tag_C then
                     Set_First_Entity (Typ, Next_Entity (Tag_C));

                  else
                     while Next_Entity (C) /= Tag_C loop
                        Next_Entity (C);
                     end loop;

                     Set_Next_Entity (C, Next_Entity (Tag_C));
                  end if;
               end if;
            end if;
         end CPP_Class;

         ---------------------
         -- CPP_Constructor --
         ---------------------

         --  pragma CPP_Constructor ([Entity =>] LOCAL_NAME);

         when Pragma_CPP_Constructor => CPP_Constructor : declare
            Id     : Entity_Id;
            Def_Id : Entity_Id;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Arg_Is_Local_Name (Arg1);

            Id := Expression (Arg1);
            Find_Program_Unit_Name (Id);

            --  If we did not find the name, we are done

            if Etype (Id) = Any_Type then
               return;
            end if;

            Def_Id := Entity (Id);

            if Ekind (Def_Id) = E_Function
              and then Is_Class_Wide_Type (Etype (Def_Id))
              and then Is_CPP_Class (Etype (Etype (Def_Id)))
            then
               --  What the heck is this??? this pragma allows only 1 arg

               if Arg_Count >= 2 then
                  Check_At_Most_N_Arguments (3);
                  Process_Interface_Name (Def_Id, Arg2, Arg3);
               end if;

               if No (Parameter_Specifications (Parent (Def_Id))) then
                  Set_Has_Completion (Def_Id);
                  Set_Is_Constructor (Def_Id);
               else
                  Error_Pragma_Arg
                    ("non-default constructors not implemented", Arg1);
               end if;

            else
               Error_Pragma_Arg
                 ("pragma% requires function returning a 'C'P'P_Class type",
                   Arg1);
            end if;
         end CPP_Constructor;

         -----------------
         -- CPP_Virtual --
         -----------------

         --  pragma CPP_Virtual
         --      [Entity =>]       LOCAL_NAME
         --    [ [Vtable_Ptr =>]   LOCAL_NAME,
         --      [Position =>]     static_integer_EXPRESSION]);

         when Pragma_CPP_Virtual => CPP_Virtual : declare
            Arg      : Node_Id;
            Typ      : Entity_Id;
            Subp     : Entity_Id;
            VTP_Type : constant Entity_Id  := RTE (RE_Vtable_Ptr);
            DTC      : Entity_Id;
            V        : Uint;

         begin
            GNAT_Pragma;

            if Arg_Count = 3 then
               Check_Optional_Identifier (Arg2, "vtable_ptr");

               --  We allow Entry_Count as well as Position for the third
               --  parameter for back compatibility with versions of GNAT
               --  before version 3.12. The documentation has always said
               --  Position, but the code up to 3.12 said Entry_Count.

               if Chars (Arg3) /= Name_Position then
                  Check_Optional_Identifier (Arg3, "entry_count");
               end if;

            else
               Check_Arg_Count (1);
            end if;

            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Arg_Is_Local_Name (Arg1);

            --  First argument must be a subprogram name

            Arg := Expression (Arg1);
            Find_Program_Unit_Name (Arg);

            if Etype (Arg) = Any_Type then
               return;
            else
               Subp := Entity (Arg);
            end if;

            if not (Is_Subprogram (Subp)
                     and then Is_Dispatching_Operation (Subp))
            then
               Error_Pragma_Arg
                 ("pragma% must reference a primitive operation", Arg1);
            end if;

            Typ := Find_Dispatching_Type (Subp);

            --  If only one Argument defaults are :
            --    . DTC_Entity is the default Vtable pointer
            --    . DT_Position will be set at the freezing point

            if Arg_Count = 1 then
               Set_DTC_Entity (Subp, Tag_Component (Typ));
               return;
            end if;

            --  Second argument is a component name of type Vtable_Ptr

            Arg := Expression (Arg2);

            if Nkind (Arg) /= N_Identifier then
               Error_Msg_NE ("must be a& component name", Arg, Typ);
               raise Pragma_Exit;
            end if;

            DTC := First_Component (Typ);
            while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
               Next_Component (DTC);
            end loop;

            if No (DTC) then
               Error_Msg_NE ("must be a& component name", Arg, Typ);
               raise Pragma_Exit;

            elsif Etype (DTC) /= VTP_Type then
               Wrong_Type (Arg, VTP_Type);
               return;
            end if;

            --  Third argument is an integer (DT_Position)

            Arg := Expression (Arg3);
            Analyze_And_Resolve (Arg, Any_Integer);

            if not Is_Static_Expression (Arg) then
               Flag_Non_Static_Expr
                 ("third argument of pragma CPP_Virtual must be static!",
                  Arg3);
               raise Pragma_Exit;

            else
               V := Expr_Value (Expression (Arg3));

               if V <= 0 then
                  Error_Pragma_Arg
                    ("third argument of pragma% must be positive",
                     Arg3);

               else
                  Set_DTC_Entity (Subp, DTC);
                  Set_DT_Position (Subp, V);
               end if;
            end if;
         end CPP_Virtual;

         ----------------
         -- CPP_Vtable --
         ----------------

         --  pragma CPP_Vtable (
         --    [Entity =>]       LOCAL_NAME
         --    [Vtable_Ptr =>]   LOCAL_NAME,
         --    [Entry_Count =>]  static_integer_EXPRESSION);

         when Pragma_CPP_Vtable => CPP_Vtable : declare
            Arg      : Node_Id;
            Typ      : Entity_Id;
            VTP_Type : constant Entity_Id  := RTE (RE_Vtable_Ptr);
            DTC      : Entity_Id;
            V        : Uint;
            Elmt     : Elmt_Id;

         begin
            GNAT_Pragma;
            Check_Arg_Count (3);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Optional_Identifier (Arg2, "vtable_ptr");
            Check_Optional_Identifier (Arg3, "entry_count");
            Check_Arg_Is_Local_Name (Arg1);

            --  First argument is a record type name

            Arg := Expression (Arg1);
            Analyze (Arg);

            if Etype (Arg) = Any_Type then
               return;
            else
               Typ := Entity (Arg);
            end if;

            if not (Is_Tagged_Type (Typ) and then Is_CPP_Class (Typ)) then
               Error_Pragma_Arg ("'C'P'P_Class tagged type expected", Arg1);
            end if;

            --  Second argument is a component name of type Vtable_Ptr

            Arg := Expression (Arg2);

            if Nkind (Arg) /= N_Identifier then
               Error_Msg_NE ("must be a& component name", Arg, Typ);
               raise Pragma_Exit;
            end if;

            DTC := First_Component (Typ);
            while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
               Next_Component (DTC);
            end loop;

            if No (DTC) then
               Error_Msg_NE ("must be a& component name", Arg, Typ);
               raise Pragma_Exit;

            elsif Etype (DTC) /= VTP_Type then
               Wrong_Type (DTC, VTP_Type);
               return;

            --  If it is the first pragma Vtable, This becomes the default tag

            elsif (not Is_Tag (DTC))
              and then DT_Entry_Count (Tag_Component (Typ)) = No_Uint
            then
               Set_Is_Tag (Tag_Component (Typ), False);
               Set_Is_Tag (DTC, True);
               Set_DT_Entry_Count (DTC, No_Uint);
            end if;

            --  Those pragmas must appear before any primitive operation
            --  definition (except inherited ones) otherwise the default
            --  may be wrong

            Elmt := First_Elmt (Primitive_Operations (Typ));
            while Present (Elmt) loop
               if No (Alias (Node (Elmt))) then
                  Error_Msg_Sloc := Sloc (Node (Elmt));
                  Error_Pragma
                    ("pragma% must appear before this primitive operation");
               end if;

               Next_Elmt (Elmt);
            end loop;

            --  Third argument is an integer (DT_Entry_Count)

            Arg := Expression (Arg3);
            Analyze_And_Resolve (Arg, Any_Integer);

            if not Is_Static_Expression (Arg) then
               Flag_Non_Static_Expr
                 ("entry count for pragma CPP_Vtable must be a static " &
                  "expression!", Arg3);
               raise Pragma_Exit;

            else
               V := Expr_Value (Expression (Arg3));

               if V <= 0 then
                  Error_Pragma_Arg
                    ("entry count for pragma% must be positive", Arg3);
               else
                  Set_DT_Entry_Count (DTC, V);
               end if;
            end if;
         end CPP_Vtable;

         -----------
         -- Debug --
         -----------

         --  pragma Debug (PROCEDURE_CALL_STATEMENT);

         when Pragma_Debug => Debug : begin
            GNAT_Pragma;

            --  If assertions are enabled, and we are expanding code, then
            --  we rewrite the pragma with its corresponding procedure call
            --  and then analyze the call.

            if Assertions_Enabled and Expander_Active then
               Rewrite (N, Relocate_Node (Debug_Statement (N)));
               Analyze (N);

            --  Otherwise we work a bit to get a tree that makes sense
            --  for ASIS purposes, namely a pragma with an analyzed
            --  argument that looks like a procedure call.

            else
               Expander_Mode_Save_And_Set (False);
               Rewrite (N, Relocate_Node (Debug_Statement (N)));
               Analyze (N);
               Rewrite (N,
                 Make_Pragma (Loc,
                   Chars => Name_Debug,
                   Pragma_Argument_Associations =>
                     New_List (Relocate_Node (N))));
               Expander_Mode_Restore;
            end if;
         end Debug;

         ---------------------
         -- Detect_Blocking --
         ---------------------

         --  pragma Detect_Blocking;

         when Pragma_Detect_Blocking =>
            GNAT_Pragma;
            Check_Arg_Count (0);
            Check_Valid_Configuration_Pragma;
            Detect_Blocking := True;

         -------------------
         -- Discard_Names --
         -------------------

         --  pragma Discard_Names [([On =>] LOCAL_NAME)];

         when Pragma_Discard_Names => Discard_Names : declare
            E_Id : Entity_Id;
            E    : Entity_Id;

         begin
            Check_Ada_83_Warning;

            --  Deal with configuration pragma case

            if Arg_Count = 0 and then Is_Configuration_Pragma then
               Global_Discard_Names := True;
               return;

            --  Otherwise, check correct appropriate context

            else
               Check_Is_In_Decl_Part_Or_Package_Spec;

               if Arg_Count = 0 then

                  --  If there is no parameter, then from now on this pragma
                  --  applies to any enumeration, exception or tagged type
                  --  defined in the current declarative part.

                  Set_Discard_Names (Current_Scope);
                  return;

               else
                  Check_Arg_Count (1);
                  Check_Optional_Identifier (Arg1, Name_On);
                  Check_Arg_Is_Local_Name (Arg1);
                  E_Id := Expression (Arg1);

                  if Etype (E_Id) = Any_Type then
                     return;
                  else
                     E := Entity (E_Id);
                  end if;

                  if (Is_First_Subtype (E)
                       and then (Is_Enumeration_Type (E)
                                  or else Is_Tagged_Type (E)))
                    or else Ekind (E) = E_Exception
                  then
                     Set_Discard_Names (E);
                  else
                     Error_Pragma_Arg
                       ("inappropriate entity for pragma%", Arg1);
                  end if;
               end if;
            end if;
         end Discard_Names;

         ---------------
         -- Elaborate --
         ---------------

         --  pragma Elaborate (library_unit_NAME {, library_unit_NAME});

         when Pragma_Elaborate => Elaborate : declare
            Plist       : List_Id;
            Parent_Node : Node_Id;
            Arg         : Node_Id;
            Citem       : Node_Id;

         begin
            --  Pragma must be in context items list of a compilation unit

            if not Is_List_Member (N) then
               Pragma_Misplaced;
               return;

            else
               Plist := List_Containing (N);
               Parent_Node := Parent (Plist);

               if Parent_Node = Empty
                 or else Nkind (Parent_Node) /= N_Compilation_Unit
                 or else Context_Items (Parent_Node) /= Plist
               then
                  Pragma_Misplaced;
                  return;
               end if;
            end if;

            --  Must be at least one argument

            if Arg_Count = 0 then
               Error_Pragma ("pragma% requires at least one argument");
            end if;

            --  In Ada 83 mode, there can be no items following it in the
            --  context list except other pragmas and implicit with clauses
            --  (e.g. those added by use of Rtsfind). In Ada 95 mode, this
            --  placement rule does not apply.

            if Ada_Version = Ada_83 and then Comes_From_Source (N) then
               Citem := Next (N);

               while Present (Citem) loop
                  if Nkind (Citem) = N_Pragma
                    or else (Nkind (Citem) = N_With_Clause
                              and then Implicit_With (Citem))
                  then
                     null;
                  else
                     Error_Pragma
                       ("(Ada 83) pragma% must be at end of context clause");
                  end if;

                  Next (Citem);
               end loop;
            end if;

            --  Finally, the arguments must all be units mentioned in a with
            --  clause in the same context clause. Note we already checked
            --  (in Par.Prag) that the arguments are either identifiers or

            Arg := Arg1;
            Outer : while Present (Arg) loop
               Citem := First (Plist);

               Inner : while Citem /= N loop
                  if Nkind (Citem) = N_With_Clause
                    and then Same_Name (Name (Citem), Expression (Arg))
                  then
                     Set_Elaborate_Present (Citem, True);
                     Set_Unit_Name (Expression (Arg), Name (Citem));
                     Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
                     exit Inner;
                  end if;

                  Next (Citem);
               end loop Inner;

               if Citem = N then
                  Error_Pragma_Arg
                    ("argument of pragma% is not with'ed unit", Arg);
               end if;

               Next (Arg);
            end loop Outer;

            --  Give a warning if operating in static mode with -gnatwl
            --  (elaboration warnings eanbled) switch set.

            if Elab_Warnings and not Dynamic_Elaboration_Checks then
               Error_Msg_N
                 ("?use of pragma Elaborate may not be safe", N);
               Error_Msg_N
                 ("?use pragma Elaborate_All instead if possible", N);
            end if;
         end Elaborate;

         -------------------
         -- Elaborate_All --
         -------------------

         --  pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});

         when Pragma_Elaborate_All => Elaborate_All : declare
            Plist       : List_Id;
            Parent_Node : Node_Id;
            Arg         : Node_Id;
            Citem       : Node_Id;

         begin
            Check_Ada_83_Warning;

            --  Pragma must be in context items list of a compilation unit

            if not Is_List_Member (N) then
               Pragma_Misplaced;
               return;

            else
               Plist := List_Containing (N);
               Parent_Node := Parent (Plist);

               if Parent_Node = Empty
                 or else Nkind (Parent_Node) /= N_Compilation_Unit
                 or else Context_Items (Parent_Node) /= Plist
               then
                  Pragma_Misplaced;
                  return;
               end if;
            end if;

            --  Must be at least one argument

            if Arg_Count = 0 then
               Error_Pragma ("pragma% requires at least one argument");
            end if;

            --  Note: unlike pragma Elaborate, pragma Elaborate_All does not
            --  have to appear at the end of the context clause, but may
            --  appear mixed in with other items, even in Ada 83 mode.

            --  Final check: the arguments must all be units mentioned in
            --  a with clause in the same context clause. Note that we
            --  already checked (in Par.Prag) that all the arguments are
            --  either identifiers or selected components.

            Arg := Arg1;
            Outr : while Present (Arg) loop
               Citem := First (Plist);

               Innr : while Citem /= N loop
                  if Nkind (Citem) = N_With_Clause
                    and then Same_Name (Name (Citem), Expression (Arg))
                  then
                     Set_Elaborate_All_Present (Citem, True);
                     Set_Unit_Name (Expression (Arg), Name (Citem));
                     Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
                     exit Innr;
                  end if;

                  Next (Citem);
               end loop Innr;

               if Citem = N then
                  Set_Error_Posted (N);
                  Error_Pragma_Arg
                    ("argument of pragma% is not with'ed unit", Arg);
               end if;

               Next (Arg);
            end loop Outr;
         end Elaborate_All;

         --------------------
         -- Elaborate_Body --
         --------------------

         --  pragma Elaborate_Body [( library_unit_NAME )];

         when Pragma_Elaborate_Body => Elaborate_Body : declare
            Cunit_Node : Node_Id;
            Cunit_Ent  : Entity_Id;

         begin
            Check_Ada_83_Warning;
            Check_Valid_Library_Unit_Pragma;

            if Nkind (N) = N_Null_Statement then
               return;
            end if;

            Cunit_Node := Cunit (Current_Sem_Unit);
            Cunit_Ent  := Cunit_Entity (Current_Sem_Unit);

            if Nkind (Unit (Cunit_Node)) = N_Package_Body
                 or else
               Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
            then
               Error_Pragma ("pragma% must refer to a spec, not a body");
            else
               Set_Body_Required (Cunit_Node, True);
               Set_Has_Pragma_Elaborate_Body     (Cunit_Ent);

               --  If we are in dynamic elaboration mode, then we suppress
               --  elaboration warnings for the unit, since it is definitely
               --  fine NOT to do dynamic checks at the first level (and such
               --  checks will be suppressed because no elaboration boolean
               --  is created for Elaborate_Body packages).

               --  But in the static model of elaboration, Elaborate_Body is
               --  definitely NOT good enough to ensure elaboration safety on
               --  its own, since the body may WITH other units that are not
               --  safe from an elaboration point of view, so a client must
               --  still do an Elaborate_All on such units.

               --  Debug flag -gnatdD restores the old behavior of 3.13,
               --  where Elaborate_Body always suppressed elab warnings.

               if Dynamic_Elaboration_Checks or Debug_Flag_DD then
                  Set_Suppress_Elaboration_Warnings (Cunit_Ent);
               end if;
            end if;
         end Elaborate_Body;

         ------------------------
         -- Elaboration_Checks --
         ------------------------

         --  pragma Elaboration_Checks (Static | Dynamic);

         when Pragma_Elaboration_Checks =>
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
            Dynamic_Elaboration_Checks :=
              (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);

         ---------------
         -- Eliminate --
         ---------------

         --  pragma Eliminate (
         --      [Unit_Name       =>]  IDENTIFIER |
         --                            SELECTED_COMPONENT
         --    [,[Entity          =>]  IDENTIFIER |
         --                            SELECTED_COMPONENT |
         --                            STRING_LITERAL]
         --    [,]OVERLOADING_RESOLUTION);

         --  OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
         --                             SOURCE_LOCATION

         --  PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
         --                                        FUNCTION_PROFILE

         --  PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES

         --  FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
         --                       Result_Type => result_SUBTYPE_NAME]

         --  PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
         --  SUBTYPE_NAME    ::= STRING_LITERAL

         --  SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
         --  SOURCE_TRACE    ::= STRING_LITERAL

         when Pragma_Eliminate => Eliminate : declare
            Args  : Args_List (1 .. 5);
            Names : constant Name_List (1 .. 5) := (
                      Name_Unit_Name,
                      Name_Entity,
                      Name_Parameter_Types,
                      Name_Result_Type,
                      Name_Source_Location);

            Unit_Name       : Node_Id renames Args (1);
            Entity          : Node_Id renames Args (2);
            Parameter_Types : Node_Id renames Args (3);
            Result_Type     : Node_Id renames Args (4);
            Source_Location : Node_Id renames Args (5);

         begin
            GNAT_Pragma;
            Check_Valid_Configuration_Pragma;
            Gather_Associations (Names, Args);

            if No (Unit_Name) then
               Error_Pragma ("missing Unit_Name argument for pragma%");
            end if;

            if No (Entity)
              and then (Present (Parameter_Types)
                          or else
                        Present (Result_Type)
                          or else
                        Present (Source_Location))
            then
               Error_Pragma ("missing Entity argument for pragma%");
            end if;

            if (Present (Parameter_Types)
                       or else
                Present (Result_Type))
              and then
                Present (Source_Location)
            then
               Error_Pragma
                 ("parameter profile and source location can not " &
                  "be used together in pragma%");
            end if;

            Process_Eliminate_Pragma
              (N,
               Unit_Name,
               Entity,
               Parameter_Types,
               Result_Type,
               Source_Location);
         end Eliminate;

         --------------------------
         --  Explicit_Overriding --
         --------------------------

         when Pragma_Explicit_Overriding =>
            Check_Valid_Configuration_Pragma;
            Check_Arg_Count (0);
            Explicit_Overriding := True;

         ------------
         -- Export --
         ------------

         --  pragma Export (
         --    [   Convention    =>] convention_IDENTIFIER,
         --    [   Entity        =>] local_NAME
         --    [, [External_Name =>] static_string_EXPRESSION ]
         --    [, [Link_Name     =>] static_string_EXPRESSION ]);

         when Pragma_Export => Export : declare
            C      : Convention_Id;
            Def_Id : Entity_Id;

         begin
            Check_Ada_83_Warning;
            Check_At_Least_N_Arguments (2);
            Check_At_Most_N_Arguments  (4);
            Process_Convention (C, Def_Id);

            if Ekind (Def_Id) /= E_Constant then
               Note_Possible_Modification (Expression (Arg2));
            end if;

            Process_Interface_Name (Def_Id, Arg3, Arg4);
            Set_Exported (Def_Id, Arg2);
         end Export;

         ----------------------
         -- Export_Exception --
         ----------------------

         --  pragma Export_Exception (
         --        [Internal         =>] LOCAL_NAME,
         --     [, [External         =>] EXTERNAL_SYMBOL,]
         --     [, [Form     =>] Ada | VMS]
         --     [, [Code     =>] static_integer_EXPRESSION]);

         when Pragma_Export_Exception => Export_Exception : declare
            Args  : Args_List (1 .. 4);
            Names : constant Name_List (1 .. 4) := (
                      Name_Internal,
                      Name_External,
                      Name_Form,
                      Name_Code);

            Internal : Node_Id renames Args (1);
            External : Node_Id renames Args (2);
            Form     : Node_Id renames Args (3);
            Code     : Node_Id renames Args (4);

         begin
            if Inside_A_Generic then
               Error_Pragma ("pragma% cannot be used for generic entities");
            end if;

            Gather_Associations (Names, Args);
            Process_Extended_Import_Export_Exception_Pragma (
              Arg_Internal => Internal,
              Arg_External => External,
              Arg_Form     => Form,
              Arg_Code     => Code);

            if not Is_VMS_Exception (Entity (Internal)) then
               Set_Exported (Entity (Internal), Internal);
            end if;
         end Export_Exception;

         ---------------------
         -- Export_Function --
         ---------------------

         --  pragma Export_Function (
         --        [Internal         =>] LOCAL_NAME,
         --     [, [External         =>] EXTERNAL_SYMBOL,]
         --     [, [Parameter_Types  =>] (PARAMETER_TYPES)]
         --     [, [Result_Type      =>] TYPE_DESIGNATOR]
         --     [, [Mechanism        =>] MECHANISM]
         --     [, [Result_Mechanism =>] MECHANISM_NAME]);

         --  EXTERNAL_SYMBOL ::=
         --    IDENTIFIER
         --  | static_string_EXPRESSION

         --  PARAMETER_TYPES ::=
         --    null
         --  | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}

         --  TYPE_DESIGNATOR ::=
         --    subtype_NAME
         --  | subtype_Name ' Access

         --  MECHANISM ::=
         --    MECHANISM_NAME
         --  | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})

         --  MECHANISM_ASSOCIATION ::=
         --    [formal_parameter_NAME =>] MECHANISM_NAME

         --  MECHANISM_NAME ::=
         --    Value
         --  | Reference
         --  | Descriptor [([Class =>] CLASS_NAME)]

         --  CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca

         when Pragma_Export_Function => Export_Function : declare
            Args  : Args_List (1 .. 6);
            Names : constant Name_List (1 .. 6) := (
                      Name_Internal,
                      Name_External,
                      Name_Parameter_Types,
                      Name_Result_Type,
                      Name_Mechanism,
                      Name_Result_Mechanism);

            Internal         : Node_Id renames Args (1);
            External         : Node_Id renames Args (2);
            Parameter_Types  : Node_Id renames Args (3);
            Result_Type      : Node_Id renames Args (4);
            Mechanism        : Node_Id renames Args (5);
            Result_Mechanism : Node_Id renames Args (6);

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);
            Process_Extended_Import_Export_Subprogram_Pragma (
              Arg_Internal         => Internal,
              Arg_External         => External,
              Arg_Parameter_Types  => Parameter_Types,
              Arg_Result_Type      => Result_Type,
              Arg_Mechanism        => Mechanism,
              Arg_Result_Mechanism => Result_Mechanism);
         end Export_Function;

         -------------------
         -- Export_Object --
         -------------------

         --  pragma Export_Object (
         --        [Internal =>] LOCAL_NAME,
         --     [, [External =>] EXTERNAL_SYMBOL]
         --     [, [Size     =>] EXTERNAL_SYMBOL]);

         --  EXTERNAL_SYMBOL ::=
         --    IDENTIFIER
         --  | static_string_EXPRESSION

         --  PARAMETER_TYPES ::=
         --    null
         --  | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}

         --  TYPE_DESIGNATOR ::=
         --    subtype_NAME
         --  | subtype_Name ' Access

         --  MECHANISM ::=
         --    MECHANISM_NAME
         --  | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})

         --  MECHANISM_ASSOCIATION ::=
         --    [formal_parameter_NAME =>] MECHANISM_NAME

         --  MECHANISM_NAME ::=
         --    Value
         --  | Reference
         --  | Descriptor [([Class =>] CLASS_NAME)]

         --  CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca

         when Pragma_Export_Object => Export_Object : declare
            Args  : Args_List (1 .. 3);
            Names : constant Name_List (1 .. 3) := (
                      Name_Internal,
                      Name_External,
                      Name_Size);

            Internal : Node_Id renames Args (1);
            External : Node_Id renames Args (2);
            Size     : Node_Id renames Args (3);

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);
            Process_Extended_Import_Export_Object_Pragma (
              Arg_Internal => Internal,
              Arg_External => External,
              Arg_Size     => Size);
         end Export_Object;

         ----------------------
         -- Export_Procedure --
         ----------------------

         --  pragma Export_Procedure (
         --        [Internal         =>] LOCAL_NAME,
         --     [, [External         =>] EXTERNAL_SYMBOL,]
         --     [, [Parameter_Types  =>] (PARAMETER_TYPES)]
         --     [, [Mechanism        =>] MECHANISM]);

         --  EXTERNAL_SYMBOL ::=
         --    IDENTIFIER
         --  | static_string_EXPRESSION

         --  PARAMETER_TYPES ::=
         --    null
         --  | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}

         --  TYPE_DESIGNATOR ::=
         --    subtype_NAME
         --  | subtype_Name ' Access

         --  MECHANISM ::=
         --    MECHANISM_NAME
         --  | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})

         --  MECHANISM_ASSOCIATION ::=
         --    [formal_parameter_NAME =>] MECHANISM_NAME

         --  MECHANISM_NAME ::=
         --    Value
         --  | Reference
         --  | Descriptor [([Class =>] CLASS_NAME)]

         --  CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca

         when Pragma_Export_Procedure => Export_Procedure : declare
            Args  : Args_List (1 .. 4);
            Names : constant Name_List (1 .. 4) := (
                      Name_Internal,
                      Name_External,
                      Name_Parameter_Types,
                      Name_Mechanism);

            Internal        : Node_Id renames Args (1);
            External        : Node_Id renames Args (2);
            Parameter_Types : Node_Id renames Args (3);
            Mechanism       : Node_Id renames Args (4);

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);
            Process_Extended_Import_Export_Subprogram_Pragma (
              Arg_Internal        => Internal,
              Arg_External        => External,
              Arg_Parameter_Types => Parameter_Types,
              Arg_Mechanism       => Mechanism);
         end Export_Procedure;

         ------------------
         -- Export_Value --
         ------------------

         --  pragma Export_Value (
         --     [Value     =>] static_integer_EXPRESSION,
         --     [Link_Name =>] static_string_EXPRESSION);

         when Pragma_Export_Value =>
            GNAT_Pragma;
            Check_Arg_Count (2);

            Check_Optional_Identifier (Arg1, Name_Value);
            Check_Arg_Is_Static_Expression (Arg1, Any_Integer);

            Check_Optional_Identifier (Arg2, Name_Link_Name);
            Check_Arg_Is_Static_Expression (Arg2, Standard_String);

         -----------------------------
         -- Export_Valued_Procedure --
         -----------------------------

         --  pragma Export_Valued_Procedure (
         --        [Internal         =>] LOCAL_NAME,
         --     [, [External         =>] EXTERNAL_SYMBOL,]
         --     [, [Parameter_Types  =>] (PARAMETER_TYPES)]
         --     [, [Mechanism        =>] MECHANISM]);

         --  EXTERNAL_SYMBOL ::=
         --    IDENTIFIER
         --  | static_string_EXPRESSION

         --  PARAMETER_TYPES ::=
         --    null
         --  | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}

         --  TYPE_DESIGNATOR ::=
         --    subtype_NAME
         --  | subtype_Name ' Access

         --  MECHANISM ::=
         --    MECHANISM_NAME
         --  | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})

         --  MECHANISM_ASSOCIATION ::=
         --    [formal_parameter_NAME =>] MECHANISM_NAME

         --  MECHANISM_NAME ::=
         --    Value
         --  | Reference
         --  | Descriptor [([Class =>] CLASS_NAME)]

         --  CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca

         when Pragma_Export_Valued_Procedure =>
         Export_Valued_Procedure : declare
            Args  : Args_List (1 .. 4);
            Names : constant Name_List (1 .. 4) := (
                      Name_Internal,
                      Name_External,
                      Name_Parameter_Types,
                      Name_Mechanism);

            Internal        : Node_Id renames Args (1);
            External        : Node_Id renames Args (2);
            Parameter_Types : Node_Id renames Args (3);
            Mechanism       : Node_Id renames Args (4);

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);
            Process_Extended_Import_Export_Subprogram_Pragma (
              Arg_Internal        => Internal,
              Arg_External        => External,
              Arg_Parameter_Types => Parameter_Types,
              Arg_Mechanism       => Mechanism);
         end Export_Valued_Procedure;

         -------------------
         -- Extend_System --
         -------------------

         --  pragma Extend_System ([Name =>] Identifier);

         when Pragma_Extend_System => Extend_System : declare
         begin
            GNAT_Pragma;
            Check_Valid_Configuration_Pragma;
            Check_Arg_Count (1);
            Check_Optional_Identifier (Arg1, Name_Name);
            Check_Arg_Is_Identifier (Arg1);

            Get_Name_String (Chars (Expression (Arg1)));

            if Name_Len > 4
              and then Name_Buffer (1 .. 4) = "aux_"
            then
               if Present (System_Extend_Pragma_Arg) then
                  if Chars (Expression (Arg1)) =
                     Chars (Expression (System_Extend_Pragma_Arg))
                  then
                     null;
                  else
                     Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
                     Error_Pragma ("pragma% conflicts with that at#");
                  end if;

               else
                  System_Extend_Pragma_Arg := Arg1;

                  if not GNAT_Mode then
                     System_Extend_Unit := Arg1;
                  end if;
               end if;
            else
               Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
            end if;
         end Extend_System;

         ------------------------
         -- Extensions_Allowed --
         ------------------------

         --  pragma Extensions_Allowed (ON | OFF);

         when Pragma_Extensions_Allowed =>
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_No_Identifiers;
            Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);

            if Chars (Expression (Arg1)) = Name_On then
               Extensions_Allowed := True;
               Ada_Version := Ada_Version_Type'Last;
            else
               Extensions_Allowed := False;
               Ada_Version := Ada_Version_Type'Min (Ada_Version, Ada_95);
            end if;

         --------------
         -- External --
         --------------

         --  pragma External (
         --    [   Convention    =>] convention_IDENTIFIER,
         --    [   Entity        =>] local_NAME
         --    [, [External_Name =>] static_string_EXPRESSION ]
         --    [, [Link_Name     =>] static_string_EXPRESSION ]);

         when Pragma_External => External : declare
            C      : Convention_Id;
            Def_Id : Entity_Id;

         begin
            GNAT_Pragma;
            Check_At_Least_N_Arguments (2);
            Check_At_Most_N_Arguments  (4);
            Process_Convention (C, Def_Id);
            Note_Possible_Modification (Expression (Arg2));
            Process_Interface_Name (Def_Id, Arg3, Arg4);
            Set_Exported (Def_Id, Arg2);
         end External;

         --------------------------
         -- External_Name_Casing --
         --------------------------

         --  pragma External_Name_Casing (
         --    UPPERCASE | LOWERCASE
         --    [, AS_IS | UPPERCASE | LOWERCASE]);

         when Pragma_External_Name_Casing =>

         External_Name_Casing : declare
         begin
            GNAT_Pragma;
            Check_No_Identifiers;

            if Arg_Count = 2 then
               Check_Arg_Is_One_Of
                 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);

               case Chars (Get_Pragma_Arg (Arg2)) is
                  when Name_As_Is     =>
                     Opt.External_Name_Exp_Casing := As_Is;

                  when Name_Uppercase =>
                     Opt.External_Name_Exp_Casing := Uppercase;

                  when Name_Lowercase =>
                     Opt.External_Name_Exp_Casing := Lowercase;

                  when others =>
                     null;
               end case;

            else
               Check_Arg_Count (1);
            end if;

            Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);

            case Chars (Get_Pragma_Arg (Arg1)) is
               when Name_Uppercase =>
                  Opt.External_Name_Imp_Casing := Uppercase;

               when Name_Lowercase =>
                  Opt.External_Name_Imp_Casing := Lowercase;

               when others =>
                  null;
            end case;
         end External_Name_Casing;

         ---------------------------
         -- Finalize_Storage_Only --
         ---------------------------

         --  pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);

         when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
            Assoc   : constant Node_Id := Arg1;
            Type_Id : constant Node_Id := Expression (Assoc);
            Typ     : Entity_Id;

         begin
            Check_No_Identifiers;
            Check_Arg_Count (1);
            Check_Arg_Is_Local_Name (Arg1);

            Find_Type (Type_Id);
            Typ := Entity (Type_Id);

            if Typ = Any_Type
              or else Rep_Item_Too_Early (Typ, N)
            then
               return;
            else
               Typ := Underlying_Type (Typ);
            end if;

            if not Is_Controlled (Typ) then
               Error_Pragma ("pragma% must specify controlled type");
            end if;

            Check_First_Subtype (Arg1);

            if Finalize_Storage_Only (Typ) then
               Error_Pragma ("duplicate pragma%, only one allowed");

            elsif not Rep_Item_Too_Late (Typ, N) then
               Set_Finalize_Storage_Only (Base_Type (Typ), True);
            end if;
         end Finalize_Storage;

         --------------------------
         -- Float_Representation --
         --------------------------

         --  pragma Float_Representation (VAX_Float | IEEE_Float);

         when Pragma_Float_Representation => Float_Representation : declare
            Argx : Node_Id;
            Digs : Nat;
            Ent  : Entity_Id;

         begin
            GNAT_Pragma;

            if Arg_Count = 1 then
               Check_Valid_Configuration_Pragma;
            else
               Check_Arg_Count (2);
               Check_Optional_Identifier (Arg2, Name_Entity);
               Check_Arg_Is_Local_Name (Arg2);
            end if;

            Check_No_Identifier (Arg1);
            Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);

            if not OpenVMS_On_Target then
               if Chars (Expression (Arg1)) = Name_VAX_Float then
                  Error_Pragma
                    ("?pragma% ignored (applies only to Open'V'M'S)");
               end if;

               return;
            end if;

            --  One argument case

            if Arg_Count = 1 then

               if Chars (Expression (Arg1)) = Name_VAX_Float then

                  if Opt.Float_Format = 'I' then
                     Error_Pragma ("'I'E'E'E format previously specified");
                  end if;

                  Opt.Float_Format := 'V';

               else
                  if Opt.Float_Format = 'V' then
                     Error_Pragma ("'V'A'X format previously specified");
                  end if;

                  Opt.Float_Format := 'I';
               end if;

               Set_Standard_Fpt_Formats;

            --  Two argument case

            else
               Argx := Get_Pragma_Arg (Arg2);

               if not Is_Entity_Name (Argx)
                 or else not Is_Floating_Point_Type (Entity (Argx))
               then
                  Error_Pragma_Arg
                    ("second argument of% pragma must be floating-point type",
                     Arg2);
               end if;

               Ent  := Entity (Argx);
               Digs := UI_To_Int (Digits_Value (Ent));

               --  Two arguments, VAX_Float case

               if Chars (Expression (Arg1)) = Name_VAX_Float then

                  case Digs is
                     when  6 => Set_F_Float (Ent);
                     when  9 => Set_D_Float (Ent);
                     when 15 => Set_G_Float (Ent);

                     when others =>
                        Error_Pragma_Arg
                          ("wrong digits value, must be 6,9 or 15", Arg2);
                  end case;

               --  Two arguments, IEEE_Float case

               else
                  case Digs is
                     when  6 => Set_IEEE_Short (Ent);
                     when 15 => Set_IEEE_Long  (Ent);

                     when others =>
                        Error_Pragma_Arg
                          ("wrong digits value, must be 6 or 15", Arg2);
                  end case;
               end if;
            end if;
         end Float_Representation;

         -----------
         -- Ident --
         -----------

         --  pragma Ident (static_string_EXPRESSION)

         --  Note: pragma Comment shares this processing. Pragma Comment
         --  is identical to Ident, except that the restriction of the
         --  argument to 31 characters and the placement restrictions
         --  are not enforced for pragma Comment.

         when Pragma_Ident | Pragma_Comment => Ident : declare
            Str : Node_Id;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_No_Identifiers;
            Check_Arg_Is_Static_Expression (Arg1, Standard_String);

            --  For pragma Ident, preserve DEC compatibility by requiring
            --  the pragma to appear in a declarative part or package spec.

            if Prag_Id = Pragma_Ident then
               Check_Is_In_Decl_Part_Or_Package_Spec;
            end if;

            Str := Expr_Value_S (Expression (Arg1));

            declare
               CS : Node_Id;
               GP : Node_Id;

            begin
               GP := Parent (Parent (N));

               if Nkind (GP) = N_Package_Declaration
                    or else
                  Nkind (GP) = N_Generic_Package_Declaration
               then
                  GP := Parent (GP);
               end if;

               --  If we have a compilation unit, then record the ident
               --  value, checking for improper duplication.

               if Nkind (GP) = N_Compilation_Unit then
                  CS := Ident_String (Current_Sem_Unit);

                  if Present (CS) then

                     --  For Ident, we do not permit multiple instances

                     if Prag_Id = Pragma_Ident then
                        Error_Pragma ("duplicate% pragma not permitted");

                     --  For Comment, we concatenate the string, unless we
                     --  want to preserve the tree structure for ASIS.

                     elsif not ASIS_Mode then
                        Start_String (Strval (CS));
                        Store_String_Char (' ');
                        Store_String_Chars (Strval (Str));
                        Set_Strval (CS, End_String);
                     end if;

                  else
                     --  In VMS, the effect of IDENT is achieved by passing
                     --  IDENTIFICATION=name as a --for-linker switch.

                     if OpenVMS_On_Target then
                        Start_String;
                        Store_String_Chars
                          ("--for-linker=IDENTIFICATION=");
                        String_To_Name_Buffer (Strval (Str));
                        Store_String_Chars (Name_Buffer (1 .. Name_Len));

                        --  Only the last processed IDENT is saved. The main
                        --  purpose is so an IDENT associated with a main
                        --  procedure will be used in preference to an IDENT
                        --  associated with a with'd package.

                        Replace_Linker_Option_String
                          (End_String, "--for-linker=IDENTIFICATION=");
                     end if;

                     Set_Ident_String (Current_Sem_Unit, Str);
                  end if;

               --  For subunits, we just ignore the Ident, since in GNAT
               --  these are not separate object files, and hence not
               --  separate units in the unit table.

               elsif Nkind (GP) = N_Subunit then
                  null;

               --  Otherwise we have a misplaced pragma Ident, but we ignore
               --  this if we are in an instantiation, since it comes from
               --  a generic, and has no relevance to the instantiation.

               elsif Prag_Id = Pragma_Ident then
                  if Instantiation_Location (Loc) = No_Location then
                     Error_Pragma ("pragma% only allowed at outer level");
                  end if;
               end if;
            end;
         end Ident;

         ------------
         -- Import --
         ------------

         --  pragma Import (
         --    [   Convention    =>] convention_IDENTIFIER,
         --    [   Entity        =>] local_NAME
         --    [, [External_Name =>] static_string_EXPRESSION ]
         --    [, [Link_Name     =>] static_string_EXPRESSION ]);

         when Pragma_Import =>
            Check_Ada_83_Warning;
            Check_At_Least_N_Arguments (2);
            Check_At_Most_N_Arguments  (4);
            Process_Import_Or_Interface;

         ----------------------
         -- Import_Exception --
         ----------------------

         --  pragma Import_Exception (
         --        [Internal         =>] LOCAL_NAME,
         --     [, [External         =>] EXTERNAL_SYMBOL,]
         --     [, [Form     =>] Ada | VMS]
         --     [, [Code     =>] static_integer_EXPRESSION]);

         when Pragma_Import_Exception => Import_Exception : declare
            Args  : Args_List (1 .. 4);
            Names : constant Name_List (1 .. 4) := (
                      Name_Internal,
                      Name_External,
                      Name_Form,
                      Name_Code);

            Internal : Node_Id renames Args (1);
            External : Node_Id renames Args (2);
            Form     : Node_Id renames Args (3);
            Code     : Node_Id renames Args (4);

         begin
            Gather_Associations (Names, Args);

            if Present (External) and then Present (Code) then
               Error_Pragma
                 ("cannot give both External and Code options for pragma%");
            end if;

            Process_Extended_Import_Export_Exception_Pragma (
              Arg_Internal => Internal,
              Arg_External => External,
              Arg_Form     => Form,
              Arg_Code     => Code);

            if not Is_VMS_Exception (Entity (Internal)) then
               Set_Imported (Entity (Internal));
            end if;
         end Import_Exception;

         ---------------------
         -- Import_Function --
         ---------------------

         --  pragma Import_Function (
         --        [Internal                 =>] LOCAL_NAME,
         --     [, [External                 =>] EXTERNAL_SYMBOL]
         --     [, [Parameter_Types          =>] (PARAMETER_TYPES)]
         --     [, [Result_Type              =>] SUBTYPE_MARK]
         --     [, [Mechanism                =>] MECHANISM]
         --     [, [Result_Mechanism         =>] MECHANISM_NAME]
         --     [, [First_Optional_Parameter =>] IDENTIFIER]);

         --  EXTERNAL_SYMBOL ::=
         --    IDENTIFIER
         --  | static_string_EXPRESSION

         --  PARAMETER_TYPES ::=
         --    null
         --  | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}

         --  TYPE_DESIGNATOR ::=
         --    subtype_NAME
         --  | subtype_Name ' Access

         --  MECHANISM ::=
         --    MECHANISM_NAME
         --  | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})

         --  MECHANISM_ASSOCIATION ::=
         --    [formal_parameter_NAME =>] MECHANISM_NAME

         --  MECHANISM_NAME ::=
         --    Value
         --  | Reference
         --  | Descriptor [([Class =>] CLASS_NAME)]

         --  CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca

         when Pragma_Import_Function => Import_Function : declare
            Args  : Args_List (1 .. 7);
            Names : constant Name_List (1 .. 7) := (
                      Name_Internal,
                      Name_External,
                      Name_Parameter_Types,
                      Name_Result_Type,
                      Name_Mechanism,
                      Name_Result_Mechanism,
                      Name_First_Optional_Parameter);

            Internal                 : Node_Id renames Args (1);
            External                 : Node_Id renames Args (2);
            Parameter_Types          : Node_Id renames Args (3);
            Result_Type              : Node_Id renames Args (4);
            Mechanism                : Node_Id renames Args (5);
            Result_Mechanism         : Node_Id renames Args (6);
            First_Optional_Parameter : Node_Id renames Args (7);

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);
            Process_Extended_Import_Export_Subprogram_Pragma (
              Arg_Internal                 => Internal,
              Arg_External                 => External,
              Arg_Parameter_Types          => Parameter_Types,
              Arg_Result_Type              => Result_Type,
              Arg_Mechanism                => Mechanism,
              Arg_Result_Mechanism         => Result_Mechanism,
              Arg_First_Optional_Parameter => First_Optional_Parameter);
         end Import_Function;

         -------------------
         -- Import_Object --
         -------------------

         --  pragma Import_Object (
         --        [Internal =>] LOCAL_NAME,
         --     [, [External =>] EXTERNAL_SYMBOL]
         --     [, [Size     =>] EXTERNAL_SYMBOL]);

         --  EXTERNAL_SYMBOL ::=
         --    IDENTIFIER
         --  | static_string_EXPRESSION

         when Pragma_Import_Object => Import_Object : declare
            Args  : Args_List (1 .. 3);
            Names : constant Name_List (1 .. 3) := (
                      Name_Internal,
                      Name_External,
                      Name_Size);

            Internal : Node_Id renames Args (1);
            External : Node_Id renames Args (2);
            Size     : Node_Id renames Args (3);

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);
            Process_Extended_Import_Export_Object_Pragma (
              Arg_Internal => Internal,
              Arg_External => External,
              Arg_Size     => Size);
         end Import_Object;

         ----------------------
         -- Import_Procedure --
         ----------------------

         --  pragma Import_Procedure (
         --        [Internal                 =>] LOCAL_NAME,
         --     [, [External                 =>] EXTERNAL_SYMBOL]
         --     [, [Parameter_Types          =>] (PARAMETER_TYPES)]
         --     [, [Mechanism                =>] MECHANISM]
         --     [, [First_Optional_Parameter =>] IDENTIFIER]);

         --  EXTERNAL_SYMBOL ::=
         --    IDENTIFIER
         --  | static_string_EXPRESSION

         --  PARAMETER_TYPES ::=
         --    null
         --  | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}

         --  TYPE_DESIGNATOR ::=
         --    subtype_NAME
         --  | subtype_Name ' Access

         --  MECHANISM ::=
         --    MECHANISM_NAME
         --  | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})

         --  MECHANISM_ASSOCIATION ::=
         --    [formal_parameter_NAME =>] MECHANISM_NAME

         --  MECHANISM_NAME ::=
         --    Value
         --  | Reference
         --  | Descriptor [([Class =>] CLASS_NAME)]

         --  CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca

         when Pragma_Import_Procedure => Import_Procedure : declare
            Args  : Args_List (1 .. 5);
            Names : constant Name_List (1 .. 5) := (
                      Name_Internal,
                      Name_External,
                      Name_Parameter_Types,
                      Name_Mechanism,
                      Name_First_Optional_Parameter);

            Internal                 : Node_Id renames Args (1);
            External                 : Node_Id renames Args (2);
            Parameter_Types          : Node_Id renames Args (3);
            Mechanism                : Node_Id renames Args (4);
            First_Optional_Parameter : Node_Id renames Args (5);

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);
            Process_Extended_Import_Export_Subprogram_Pragma (
              Arg_Internal                 => Internal,
              Arg_External                 => External,
              Arg_Parameter_Types          => Parameter_Types,
              Arg_Mechanism                => Mechanism,
              Arg_First_Optional_Parameter => First_Optional_Parameter);
         end Import_Procedure;

         -----------------------------
         -- Import_Valued_Procedure --
         -----------------------------

         --  pragma Import_Valued_Procedure (
         --        [Internal                 =>] LOCAL_NAME,
         --     [, [External                 =>] EXTERNAL_SYMBOL]
         --     [, [Parameter_Types          =>] (PARAMETER_TYPES)]
         --     [, [Mechanism                =>] MECHANISM]
         --     [, [First_Optional_Parameter =>] IDENTIFIER]);

         --  EXTERNAL_SYMBOL ::=
         --    IDENTIFIER
         --  | static_string_EXPRESSION

         --  PARAMETER_TYPES ::=
         --    null
         --  | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}

         --  TYPE_DESIGNATOR ::=
         --    subtype_NAME
         --  | subtype_Name ' Access

         --  MECHANISM ::=
         --    MECHANISM_NAME
         --  | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})

         --  MECHANISM_ASSOCIATION ::=
         --    [formal_parameter_NAME =>] MECHANISM_NAME

         --  MECHANISM_NAME ::=
         --    Value
         --  | Reference
         --  | Descriptor [([Class =>] CLASS_NAME)]

         --  CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca

         when Pragma_Import_Valued_Procedure =>
         Import_Valued_Procedure : declare
            Args  : Args_List (1 .. 5);
            Names : constant Name_List (1 .. 5) := (
                      Name_Internal,
                      Name_External,
                      Name_Parameter_Types,
                      Name_Mechanism,
                      Name_First_Optional_Parameter);

            Internal                 : Node_Id renames Args (1);
            External                 : Node_Id renames Args (2);
            Parameter_Types          : Node_Id renames Args (3);
            Mechanism                : Node_Id renames Args (4);
            First_Optional_Parameter : Node_Id renames Args (5);

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);
            Process_Extended_Import_Export_Subprogram_Pragma (
              Arg_Internal                 => Internal,
              Arg_External                 => External,
              Arg_Parameter_Types          => Parameter_Types,
              Arg_Mechanism                => Mechanism,
              Arg_First_Optional_Parameter => First_Optional_Parameter);
         end Import_Valued_Procedure;

         ------------------------
         -- Initialize_Scalars --
         ------------------------

         --  pragma Initialize_Scalars;

         when Pragma_Initialize_Scalars =>
            GNAT_Pragma;
            Check_Arg_Count (0);
            Check_Valid_Configuration_Pragma;
            Check_Restriction (No_Initialize_Scalars, N);

            if not Restriction_Active (No_Initialize_Scalars) then
               Init_Or_Norm_Scalars := True;
               Initialize_Scalars := True;
            end if;

         ------------
         -- Inline --
         ------------

         --  pragma Inline ( NAME {, NAME} );

         when Pragma_Inline =>

            --  Pragma is active if inlining option is active

            if Inline_Active then
               Process_Inline (True);

            --  Pragma is active in a predefined file in config run time mode

            elsif Configurable_Run_Time_Mode
              and then
                Is_Predefined_File_Name (Unit_File_Name (Current_Sem_Unit))
            then
               Process_Inline (True);

            --  Otherwise inlining is not active

            else
               Process_Inline (False);
            end if;

         -------------------
         -- Inline_Always --
         -------------------

         --  pragma Inline_Always ( NAME {, NAME} );

         when Pragma_Inline_Always =>
            Process_Inline (True);

         --------------------
         -- Inline_Generic --
         --------------------

         --  pragma Inline_Generic (NAME {, NAME});

         when Pragma_Inline_Generic =>
            Process_Generic_List;

         ----------------------
         -- Inspection_Point --
         ----------------------

         --  pragma Inspection_Point [(object_NAME {, object_NAME})];

         when Pragma_Inspection_Point => Inspection_Point : declare
            Arg : Node_Id;
            Exp : Node_Id;

         begin
            if Arg_Count > 0 then
               Arg := Arg1;
               loop
                  Exp := Expression (Arg);
                  Analyze (Exp);

                  if not Is_Entity_Name (Exp)
                    or else not Is_Object (Entity (Exp))
                  then
                     Error_Pragma_Arg ("object name required", Arg);
                  end if;

                  Next (Arg);
                  exit when No (Arg);
               end loop;
            end if;
         end Inspection_Point;

         ---------------
         -- Interface --
         ---------------

         --  pragma Interface (
         --    convention_IDENTIFIER,
         --    local_NAME );

         when Pragma_Interface =>
            GNAT_Pragma;
            Check_Arg_Count (2);
            Check_No_Identifiers;
            Process_Import_Or_Interface;

         --------------------
         -- Interface_Name --
         --------------------

         --  pragma Interface_Name (
         --    [  Entity        =>] local_NAME
         --    [,[External_Name =>] static_string_EXPRESSION ]
         --    [,[Link_Name     =>] static_string_EXPRESSION ]);

         when Pragma_Interface_Name => Interface_Name : declare
            Id     : Node_Id;
            Def_Id : Entity_Id;
            Hom_Id : Entity_Id;
            Found  : Boolean;

         begin
            GNAT_Pragma;
            Check_At_Least_N_Arguments (2);
            Check_At_Most_N_Arguments  (3);
            Id := Expression (Arg1);
            Analyze (Id);

            if not Is_Entity_Name (Id) then
               Error_Pragma_Arg
                 ("first argument for pragma% must be entity name", Arg1);
            elsif Etype (Id) = Any_Type then
               return;
            else
               Def_Id := Entity (Id);
            end if;

            --  Special DEC-compatible processing for the object case,
            --  forces object to be imported.

            if Ekind (Def_Id) = E_Variable then
               Kill_Size_Check_Code (Def_Id);
               Note_Possible_Modification (Id);

               --  Initialization is not allowed for imported variable

               if Present (Expression (Parent (Def_Id)))
                 and then Comes_From_Source (Expression (Parent (Def_Id)))
               then
                  Error_Msg_Sloc := Sloc (Def_Id);
                  Error_Pragma_Arg
                    ("no initialization allowed for declaration of& #",
                     Arg2);

               else
                  --  For compatibility, support VADS usage of providing both
                  --  pragmas Interface and Interface_Name to obtain the effect
                  --  of a single Import pragma.

                  if Is_Imported (Def_Id)
                    and then Present (First_Rep_Item (Def_Id))
                    and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
                    and then Chars (First_Rep_Item (Def_Id)) = Name_Interface
                  then
                     null;
                  else
                     Set_Imported (Def_Id);
                  end if;

                  Set_Is_Public (Def_Id);
                  Process_Interface_Name (Def_Id, Arg2, Arg3);
               end if;

            --  Otherwise must be subprogram

            elsif not Is_Subprogram (Def_Id) then
               Error_Pragma_Arg
                 ("argument of pragma% is not subprogram", Arg1);

            else
               Check_At_Most_N_Arguments (3);
               Hom_Id := Def_Id;
               Found := False;

               --  Loop through homonyms

               loop
                  Def_Id := Get_Base_Subprogram (Hom_Id);

                  if Is_Imported (Def_Id) then
                     Process_Interface_Name (Def_Id, Arg2, Arg3);
                     Found := True;
                  end if;

                  Hom_Id := Homonym (Hom_Id);

                  exit when No (Hom_Id)
                    or else Scope (Hom_Id) /= Current_Scope;
               end loop;

               if not Found then
                  Error_Pragma_Arg
                    ("argument of pragma% is not imported subprogram",
                     Arg1);
               end if;
            end if;
         end Interface_Name;

         -----------------------
         -- Interrupt_Handler --
         -----------------------

         --  pragma Interrupt_Handler (handler_NAME);

         when Pragma_Interrupt_Handler =>
            Check_Ada_83_Warning;
            Check_Arg_Count (1);
            Check_No_Identifiers;

            if No_Run_Time_Mode then
               Error_Msg_CRT ("Interrupt_Handler pragma", N);
            else
               Check_Interrupt_Or_Attach_Handler;
               Process_Interrupt_Or_Attach_Handler;
            end if;

         ------------------------
         -- Interrupt_Priority --
         ------------------------

         --  pragma Interrupt_Priority [(EXPRESSION)];

         when Pragma_Interrupt_Priority => Interrupt_Priority : declare
            P   : constant Node_Id := Parent (N);
            Arg : Node_Id;

         begin
            Check_Ada_83_Warning;

            if Arg_Count /= 0 then
               Arg := Expression (Arg1);
               Check_Arg_Count (1);
               Check_No_Identifiers;

               --  The expression must be analyzed in the special manner
               --  described in "Handling of Default and Per-Object
               --  Expressions" in sem.ads.

               Analyze_Per_Use_Expression (Arg, RTE (RE_Interrupt_Priority));
            end if;

            if Nkind (P) /= N_Task_Definition
              and then Nkind (P) /= N_Protected_Definition
            then
               Pragma_Misplaced;
               return;

            elsif Has_Priority_Pragma (P) then
               Error_Pragma ("duplicate pragma% not allowed");

            else
               Set_Has_Priority_Pragma (P, True);
               Record_Rep_Item (Defining_Identifier (Parent (P)), N);
            end if;
         end Interrupt_Priority;

         ---------------------
         -- Interrupt_State --
         ---------------------

         --  pragma Interrupt_State (
         --    [Name  =>] INTERRUPT_ID,
         --    [State =>] INTERRUPT_STATE);

         --  INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
         --  INTERRUPT_STATE => System | Runtime | User

         --  Note: if the interrupt id is given as an identifier, then
         --  it must be one of the identifiers in Ada.Interrupts.Names.
         --  Otherwise it is given as a static integer expression which
         --  must be in the range of Ada.Interrupts.Interrupt_ID.

         when Pragma_Interrupt_State => Interrupt_State : declare

            Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
            --  This is the entity Ada.Interrupts.Interrupt_ID;

            State_Type : Character;
            --  Set to 's'/'r'/'u' for System/Runtime/User

            IST_Num : Pos;
            --  Index to entry in Interrupt_States table

            Int_Val : Uint;
            --  Value of interrupt

            Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
            --  The first argument to the pragma

            Int_Ent : Entity_Id;
            --  Interrupt entity in Ada.Interrupts.Names

         begin
            GNAT_Pragma;
            Check_Arg_Count (2);

            Check_Optional_Identifier (Arg1, Name_Name);
            Check_Optional_Identifier (Arg2, "state");
            Check_Arg_Is_Identifier (Arg2);

            --  First argument is identifier

            if Nkind (Arg1X) = N_Identifier then

               --  Search list of names in Ada.Interrupts.Names

               Int_Ent := First_Entity (RTE (RE_Names));
               loop
                  if No (Int_Ent) then
                     Error_Pragma_Arg ("invalid interrupt name", Arg1);

                  elsif Chars (Int_Ent) = Chars (Arg1X) then
                     Int_Val := Expr_Value (Constant_Value (Int_Ent));
                     exit;
                  end if;

                  Next_Entity (Int_Ent);
               end loop;

            --  First argument is not an identifier, so it must be a
            --  static expression of type Ada.Interrupts.Interrupt_ID.

            else
               Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
               Int_Val := Expr_Value (Arg1X);

               if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
                    or else
                  Int_Val > Expr_Value (Type_High_Bound (Int_Id))
               then
                  Error_Pragma_Arg
                    ("value not in range of type " &
                     """Ada.Interrupts.Interrupt_'I'D""", Arg1);
               end if;
            end if;

            --  Check OK state

            case Chars (Get_Pragma_Arg (Arg2)) is
               when Name_Runtime => State_Type := 'r';
               when Name_System  => State_Type := 's';
               when Name_User    => State_Type := 'u';

               when others =>
                  Error_Pragma_Arg ("invalid interrupt state", Arg2);
            end case;

            --  Check if entry is already stored

            IST_Num := Interrupt_States.First;
            loop
               --  If entry not found, add it

               if IST_Num > Interrupt_States.Last then
                  Interrupt_States.Append
                    ((Interrupt_Number => UI_To_Int (Int_Val),
                      Interrupt_State  => State_Type,
                      Pragma_Loc       => Loc));
                  exit;

               --  Case of entry for the same entry

               elsif Int_Val = Interrupt_States.Table (IST_Num).
                                                           Interrupt_Number
               then
                  --  If state matches, done, no need to make redundant entry

                  exit when
                    State_Type = Interrupt_States.Table (IST_Num).
                                                           Interrupt_State;

                  --  Otherwise if state does not match, error

                  Error_Msg_Sloc :=
                    Interrupt_States.Table (IST_Num).Pragma_Loc;
                  Error_Pragma_Arg
                    ("state conflicts with that given at #", Arg2);
                  exit;
               end if;

               IST_Num := IST_Num + 1;
            end loop;
         end Interrupt_State;

         ----------------------
         -- Java_Constructor --
         ----------------------

         --  pragma Java_Constructor ([Entity =>] LOCAL_NAME);

         when Pragma_Java_Constructor => Java_Constructor : declare
            Id     : Entity_Id;
            Def_Id : Entity_Id;
            Hom_Id : Entity_Id;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Arg_Is_Local_Name (Arg1);

            Id := Expression (Arg1);
            Find_Program_Unit_Name (Id);

            --  If we did not find the name, we are done

            if Etype (Id) = Any_Type then
               return;
            end if;

            Hom_Id := Entity (Id);

            --  Loop through homonyms

            loop
               Def_Id := Get_Base_Subprogram (Hom_Id);

               --  The constructor is required to be a function returning
               --  an access type whose designated type has convention Java.

               if Ekind (Def_Id) = E_Function
                 and then Ekind (Etype (Def_Id)) in Access_Kind
                 and then
                   (Atree.Convention
                      (Designated_Type (Etype (Def_Id))) = Convention_Java
                   or else
                     Atree.Convention
                      (Root_Type (Designated_Type (Etype (Def_Id))))
                        = Convention_Java)
               then
                  Set_Is_Constructor (Def_Id);
                  Set_Convention     (Def_Id, Convention_Java);

               else
                  Error_Pragma_Arg
                    ("pragma% requires function returning a 'Java access type",
                      Arg1);
               end if;

               Hom_Id := Homonym (Hom_Id);

               exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
            end loop;
         end Java_Constructor;

         ----------------------
         -- Java_Interface --
         ----------------------

         --  pragma Java_Interface ([Entity =>] LOCAL_NAME);

         when Pragma_Java_Interface => Java_Interface : declare
            Arg : Node_Id;
            Typ : Entity_Id;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Arg_Is_Local_Name (Arg1);

            Arg := Expression (Arg1);
            Analyze (Arg);

            if Etype (Arg) = Any_Type then
               return;
            end if;

            if not Is_Entity_Name (Arg)
              or else not Is_Type (Entity (Arg))
            then
               Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
            end if;

            Typ := Underlying_Type (Entity (Arg));

            --  For now we simply check some of the semantic constraints
            --  on the type. This currently leaves out some restrictions
            --  on interface types, namely that the parent type must be
            --  java.lang.Object.Typ and that all primitives of the type
            --  should be declared abstract. ???

            if not Is_Tagged_Type (Typ) or else not Is_Abstract (Typ) then
               Error_Pragma_Arg ("pragma% requires an abstract "
                 & "tagged type", Arg1);

            elsif not Has_Discriminants (Typ)
              or else Ekind (Etype (First_Discriminant (Typ)))
                        /= E_Anonymous_Access_Type
              or else
                not Is_Class_Wide_Type
                      (Designated_Type (Etype (First_Discriminant (Typ))))
            then
               Error_Pragma_Arg
                 ("type must have a class-wide access discriminant", Arg1);
            end if;
         end Java_Interface;

         ----------------
         -- Keep_Names --
         ----------------

         --  pragma Keep_Names ([On => ] local_NAME);

         when Pragma_Keep_Names => Keep_Names : declare
            Arg : Node_Id;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Optional_Identifier (Arg1, Name_On);
            Check_Arg_Is_Local_Name (Arg1);

            Arg := Expression (Arg1);
            Analyze (Arg);

            if Etype (Arg) = Any_Type then
               return;
            end if;

            if not Is_Entity_Name (Arg)
              or else Ekind (Entity (Arg)) /= E_Enumeration_Type
            then
               Error_Pragma_Arg
                 ("pragma% requires a local enumeration type", Arg1);
            end if;

            Set_Discard_Names (Entity (Arg), False);
         end Keep_Names;

         -------------
         -- License --
         -------------

         --  pragma License (RESTRICTED | UNRESRICTED | GPL | MODIFIED_GPL);

         when Pragma_License =>
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_No_Identifiers;
            Check_Valid_Configuration_Pragma;
            Check_Arg_Is_Identifier (Arg1);

            declare
               Sind : constant Source_File_Index :=
                        Source_Index (Current_Sem_Unit);

            begin
               case Chars (Get_Pragma_Arg (Arg1)) is
                  when Name_GPL =>
                     Set_License (Sind, GPL);

                  when Name_Modified_GPL =>
                     Set_License (Sind, Modified_GPL);

                  when Name_Restricted =>
                     Set_License (Sind, Restricted);

                  when Name_Unrestricted =>
                     Set_License (Sind, Unrestricted);

                  when others =>
                     Error_Pragma_Arg ("invalid license name", Arg1);
               end case;
            end;

         ---------------
         -- Link_With --
         ---------------

         --  pragma Link_With (string_EXPRESSION {, string_EXPRESSION});

         when Pragma_Link_With => Link_With : declare
            Arg : Node_Id;

         begin
            GNAT_Pragma;

            if Operating_Mode = Generate_Code
              and then In_Extended_Main_Source_Unit (N)
            then
               Check_At_Least_N_Arguments (1);
               Check_No_Identifiers;
               Check_Is_In_Decl_Part_Or_Package_Spec;
               Check_Arg_Is_Static_Expression (Arg1, Standard_String);
               Start_String;

               Arg := Arg1;
               while Present (Arg) loop
                  Check_Arg_Is_Static_Expression (Arg, Standard_String);

                  --  Store argument, converting sequences of spaces
                  --  to a single null character (this is one of the
                  --  differences in processing between Link_With
                  --  and Linker_Options).

                  declare
                     C : constant Char_Code := Get_Char_Code (' ');
                     S : constant String_Id :=
                           Strval (Expr_Value_S (Expression (Arg)));
                     L : constant Nat := String_Length (S);
                     F : Nat := 1;

                     procedure Skip_Spaces;
                     --  Advance F past any spaces

                     procedure Skip_Spaces is
                     begin
                        while F <= L and then Get_String_Char (S, F) = C loop
                           F := F + 1;
                        end loop;
                     end Skip_Spaces;

                  begin
                     Skip_Spaces; -- skip leading spaces

                     --  Loop through characters, changing any embedded
                     --  sequence of spaces to a single null character
                     --  (this is how Link_With/Linker_Options differ)

                     while F <= L loop
                        if Get_String_Char (S, F) = C then
                           Skip_Spaces;
                           exit when F > L;
                           Store_String_Char (ASCII.NUL);

                        else
                           Store_String_Char (Get_String_Char (S, F));
                           F := F + 1;
                        end if;
                     end loop;
                  end;

                  Arg := Next (Arg);

                  if Present (Arg) then
                     Store_String_Char (ASCII.NUL);
                  end if;
               end loop;

               Store_Linker_Option_String (End_String);
            end if;
         end Link_With;

         ------------------
         -- Linker_Alias --
         ------------------

         --  pragma Linker_Alias (
         --      [Entity =>]  LOCAL_NAME
         --      [Alias  =>]  static_string_EXPRESSION);

         when Pragma_Linker_Alias =>
            GNAT_Pragma;
            Check_Arg_Count (2);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Optional_Identifier (Arg2, "alias");
            Check_Arg_Is_Library_Level_Local_Name (Arg1);
            Check_Arg_Is_Static_Expression (Arg2, Standard_String);

            --  The only processing required is to link this item on to the
            --  list of rep items for the given entity. This is accomplished
            --  by the call to Rep_Item_Too_Late (when no error is detected
            --  and False is returned).

            if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
               return;
            else
               Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
            end if;

         --------------------
         -- Linker_Options --
         --------------------

         --  pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});

         when Pragma_Linker_Options => Linker_Options : declare
            Arg : Node_Id;

         begin
            Check_Ada_83_Warning;
            Check_No_Identifiers;
            Check_Arg_Count (1);
            Check_Is_In_Decl_Part_Or_Package_Spec;

            if Operating_Mode = Generate_Code
              and then In_Extended_Main_Source_Unit (N)
            then
               Check_Arg_Is_Static_Expression (Arg1, Standard_String);
               Start_String (Strval (Expr_Value_S (Expression (Arg1))));

               Arg := Arg2;
               while Present (Arg) loop
                  Check_Arg_Is_Static_Expression (Arg, Standard_String);
                  Store_String_Char (ASCII.NUL);
                  Store_String_Chars
                    (Strval (Expr_Value_S (Expression (Arg))));
                  Arg := Next (Arg);
               end loop;

               Store_Linker_Option_String (End_String);
            end if;
         end Linker_Options;

         --------------------
         -- Linker_Section --
         --------------------

         --  pragma Linker_Section (
         --      [Entity  =>]  LOCAL_NAME
         --      [Section =>]  static_string_EXPRESSION);

         when Pragma_Linker_Section =>
            GNAT_Pragma;
            Check_Arg_Count (2);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Optional_Identifier (Arg2, Name_Section);
            Check_Arg_Is_Library_Level_Local_Name (Arg1);
            Check_Arg_Is_Static_Expression (Arg2, Standard_String);

            --  The only processing required is to link this item on to the
            --  list of rep items for the given entity. This is accomplished
            --  by the call to Rep_Item_Too_Late (when no error is detected
            --  and False is returned).

            if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
               return;
            else
               Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
            end if;

         ----------
         -- List --
         ----------

         --  pragma List (On | Off)

         --  There is nothing to do here, since we did all the processing
         --  for this pragma in Par.Prag (so that it works properly even in
         --  syntax only mode)

         when Pragma_List =>
            null;

         --------------------
         -- Locking_Policy --
         --------------------

         --  pragma Locking_Policy (policy_IDENTIFIER);

         when Pragma_Locking_Policy => declare
            LP : Character;

         begin
            Check_Ada_83_Warning;
            Check_Arg_Count (1);
            Check_No_Identifiers;
            Check_Arg_Is_Locking_Policy (Arg1);
            Check_Valid_Configuration_Pragma;
            Get_Name_String (Chars (Expression (Arg1)));
            LP := Fold_Upper (Name_Buffer (1));

            if Locking_Policy /= ' '
              and then Locking_Policy /= LP
            then
               Error_Msg_Sloc := Locking_Policy_Sloc;
               Error_Pragma ("locking policy incompatible with policy#");

            --  Set new policy, but always preserve System_Location since
            --  we like the error message with the run time name.

            else
               Locking_Policy := LP;

               if Locking_Policy_Sloc /= System_Location then
                  Locking_Policy_Sloc := Loc;
               end if;
            end if;
         end;

         ----------------
         -- Long_Float --
         ----------------

         --  pragma Long_Float (D_Float | G_Float);

         when Pragma_Long_Float =>
            GNAT_Pragma;
            Check_Valid_Configuration_Pragma;
            Check_Arg_Count (1);
            Check_No_Identifier (Arg1);
            Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);

            if not OpenVMS_On_Target then
               Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
            end if;

            --  D_Float case

            if Chars (Expression (Arg1)) = Name_D_Float then
               if Opt.Float_Format_Long = 'G' then
                  Error_Pragma ("G_Float previously specified");
               end if;

               Opt.Float_Format_Long := 'D';

            --  G_Float case (this is the default, does not need overriding)

            else
               if Opt.Float_Format_Long = 'D' then
                  Error_Pragma ("D_Float previously specified");
               end if;

               Opt.Float_Format_Long := 'G';
            end if;

            Set_Standard_Fpt_Formats;

         -----------------------
         -- Machine_Attribute --
         -----------------------

         --  pragma Machine_Attribute (
         --    [Entity         =>] LOCAL_NAME,
         --    [Attribute_Name =>] static_string_EXPRESSION
         --  [,[Info           =>] static_string_EXPRESSION] );

         when Pragma_Machine_Attribute => Machine_Attribute : declare
            Def_Id : Entity_Id;

         begin
            GNAT_Pragma;

            if Arg_Count = 3 then
               Check_Optional_Identifier (Arg3, "info");
               Check_Arg_Is_Static_Expression (Arg3, Standard_String);
            else
               Check_Arg_Count (2);
            end if;

            Check_Arg_Is_Local_Name (Arg1);
            Check_Optional_Identifier (Arg2, "attribute_name");
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Arg_Is_Static_Expression (Arg2, Standard_String);
            Def_Id := Entity (Expression (Arg1));

            if Is_Access_Type (Def_Id) then
               Def_Id := Designated_Type (Def_Id);
            end if;

            if Rep_Item_Too_Early (Def_Id, N) then
               return;
            end if;

            Def_Id := Underlying_Type (Def_Id);

            --  The only processing required is to link this item on to the
            --  list of rep items for the given entity. This is accomplished
            --  by the call to Rep_Item_Too_Late (when no error is detected
            --  and False is returned).

            if Rep_Item_Too_Late (Def_Id, N) then
               return;
            else
               Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
            end if;
         end Machine_Attribute;

         ----------
         -- Main --
         ----------

         --  pragma Main_Storage
         --   (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);

         --  MAIN_STORAGE_OPTION ::=
         --    [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
         --  | [TOP_GUARD =>] static_SIMPLE_EXPRESSION

         when Pragma_Main => Main : declare
            Args  : Args_List (1 .. 3);
            Names : constant Name_List (1 .. 3) := (
                      Name_Stack_Size,
                      Name_Task_Stack_Size_Default,
                      Name_Time_Slicing_Enabled);

            Nod : Node_Id;

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);

            for J in 1 .. 2 loop
               if Present (Args (J)) then
                  Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
               end if;
            end loop;

            if Present (Args (3)) then
               Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
            end if;

            Nod := Next (N);
            while Present (Nod) loop
               if Nkind (Nod) = N_Pragma
                 and then Chars (Nod) = Name_Main
               then
                  Error_Msg_Name_1 := Chars (N);
                  Error_Msg_N ("duplicate pragma% not permitted", Nod);
               end if;

               Next (Nod);
            end loop;
         end Main;

         ------------------
         -- Main_Storage --
         ------------------

         --  pragma Main_Storage
         --   (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);

         --  MAIN_STORAGE_OPTION ::=
         --    [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
         --  | [TOP_GUARD =>] static_SIMPLE_EXPRESSION

         when Pragma_Main_Storage => Main_Storage : declare
            Args  : Args_List (1 .. 2);
            Names : constant Name_List (1 .. 2) := (
                      Name_Working_Storage,
                      Name_Top_Guard);

            Nod : Node_Id;

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);

            for J in 1 .. 2 loop
               if Present (Args (J)) then
                  Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
               end if;
            end loop;

            Check_In_Main_Program;

            Nod := Next (N);
            while Present (Nod) loop
               if Nkind (Nod) = N_Pragma
                 and then Chars (Nod) = Name_Main_Storage
               then
                  Error_Msg_Name_1 := Chars (N);
                  Error_Msg_N ("duplicate pragma% not permitted", Nod);
               end if;

               Next (Nod);
            end loop;
         end Main_Storage;

         -----------------
         -- Memory_Size --
         -----------------

         --  pragma Memory_Size (NUMERIC_LITERAL)

         when Pragma_Memory_Size =>
            GNAT_Pragma;

            --  Memory size is simply ignored

            Check_No_Identifiers;
            Check_Arg_Count (1);
            Check_Arg_Is_Integer_Literal (Arg1);

         ---------------
         -- No_Return --
         ---------------

         --  pragma No_Return (procedure_LOCAL_NAME);

         when Pragma_No_Return => No_Return : declare
            Id    : Node_Id;
            E     : Entity_Id;
            Found : Boolean;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_No_Identifiers;
            Check_Arg_Is_Local_Name (Arg1);
            Id := Expression (Arg1);
            Analyze (Id);

            if not Is_Entity_Name (Id) then
               Error_Pragma_Arg ("entity name required", Arg1);
            end if;

            if Etype (Id) = Any_Type then
               raise Pragma_Exit;
            end if;

            E := Entity (Id);

            Found := False;
            while Present (E)
              and then Scope (E) = Current_Scope
            loop
               if Ekind (E) = E_Procedure
                 or else Ekind (E) = E_Generic_Procedure
               then
                  Set_No_Return (E);
                  Found := True;
               end if;

               E := Homonym (E);
            end loop;

            if not Found then
               Error_Pragma ("no procedures found for pragma%");
            end if;
         end No_Return;

         ------------------------
         -- No_Strict_Aliasing --
         ------------------------

         when Pragma_No_Strict_Aliasing => No_Strict_Alias : declare
            E_Id : Entity_Id;

         begin
            GNAT_Pragma;
            Check_At_Most_N_Arguments (1);

            if Arg_Count = 0 then
               Check_Valid_Configuration_Pragma;
               Opt.No_Strict_Aliasing := True;

            else
               Check_Optional_Identifier (Arg2, Name_Entity);
               Check_Arg_Is_Local_Name (Arg1);
               E_Id := Entity (Expression (Arg1));

               if E_Id = Any_Type then
                  return;
               elsif No (E_Id) or else not Is_Access_Type (E_Id) then
                  Error_Pragma_Arg ("pragma% requires access type", Arg1);
               end if;

               Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
            end if;
         end No_Strict_Alias;

         -----------------
         -- Obsolescent --
         -----------------

         --  pragma Obsolescent [(static_string_EXPRESSION)];

         when Pragma_Obsolescent => Obsolescent : declare
         begin
            GNAT_Pragma;
            Check_At_Most_N_Arguments (1);
            Check_No_Identifiers;

            if Arg_Count = 1 then
               Check_Arg_Is_Static_Expression (Arg1, Standard_String);
            end if;

            if No (Prev (N))
              or else (Nkind (Prev (N))) /= N_Subprogram_Declaration
            then
               Error_Pragma
                 ("pragma% misplaced, must immediately " &
                  "follow subprogram spec");
            end if;
         end Obsolescent;

         -----------------
         -- No_Run_Time --
         -----------------

         --  pragma No_Run_Time

         --  Note: this pragma is retained for backwards compatibiltiy.
         --  See body of Rtsfind for full details on its handling.

         when Pragma_No_Run_Time =>
            GNAT_Pragma;
            Check_Valid_Configuration_Pragma;
            Check_Arg_Count (0);

            No_Run_Time_Mode           := True;
            Configurable_Run_Time_Mode := True;

            declare
               Word32 : constant Boolean := Ttypes.System_Word_Size = 32;
            begin
               if Word32 then
                  Duration_32_Bits_On_Target := True;
               end if;
            end;

            Set_Restriction (No_Finalization, N);
            Set_Restriction (No_Exception_Handlers, N);
            Set_Restriction (Max_Tasks, N, 0);
            Set_Restriction (No_Tasking, N);

         -----------------------
         -- Normalize_Scalars --
         -----------------------

         --  pragma Normalize_Scalars;

         when Pragma_Normalize_Scalars =>
            Check_Ada_83_Warning;
            Check_Arg_Count (0);
            Check_Valid_Configuration_Pragma;
            Normalize_Scalars := True;
            Init_Or_Norm_Scalars := True;

         --------------
         -- Optimize --
         --------------

         --  pragma Optimize (Time | Space);

         --  The actual check for optimize is done in Gigi. Note that this
         --  pragma does not actually change the optimization setting, it
         --  simply checks that it is consistent with the pragma.

         when Pragma_Optimize =>
            Check_No_Identifiers;
            Check_Arg_Count (1);
            Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);

         -------------------------
         -- Optional_Overriding --
         -------------------------

         --  These pragmas are treated as part of the previous subprogram
         --  declaration, and analyzed immediately after it (see sem_ch6,
         --  Check_Overriding_Operation). If the pragma has not been analyzed
         --  yet, it appears in the wrong place.

         when Pragma_Optional_Overriding =>
            Error_Msg_N ("pragma must appear immediately after subprogram", N);

         ----------------
         -- Overriding --
         ----------------

         when Pragma_Overriding =>
            Error_Msg_N ("pragma must appear immediately after subprogram", N);

         ----------
         -- Pack --
         ----------

         --  pragma Pack (first_subtype_LOCAL_NAME);

         when Pragma_Pack => Pack : declare
            Assoc   : constant Node_Id := Arg1;
            Type_Id : Node_Id;
            Typ     : Entity_Id;

         begin
            Check_No_Identifiers;
            Check_Arg_Count (1);
            Check_Arg_Is_Local_Name (Arg1);

            Type_Id := Expression (Assoc);
            Find_Type (Type_Id);
            Typ := Entity (Type_Id);

            if Typ = Any_Type
              or else Rep_Item_Too_Early (Typ, N)
            then
               return;
            else
               Typ := Underlying_Type (Typ);
            end if;

            if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
               Error_Pragma ("pragma% must specify array or record type");
            end if;

            Check_First_Subtype (Arg1);

            if Has_Pragma_Pack (Typ) then
               Error_Pragma ("duplicate pragma%, only one allowed");

            --  Array type. We set the Has_Pragma_Pack flag, and Is_Packed,
            --  but not Has_Non_Standard_Rep, because we don't actually know
            --  till freeze time if the array can have packed representation.
            --  That's because in the general case we do not know enough about
            --  the component type until it in turn is frozen, which certainly
            --  happens before the array type is frozen, but not necessarily
            --  till that point (i.e. right now it may be unfrozen).

            elsif Is_Array_Type (Typ) then
               if Has_Aliased_Components (Base_Type (Typ)) then
                  Error_Pragma
                    ("pragma% ignored, cannot pack aliased components?");

               elsif Has_Atomic_Components (Typ)
                 or else Is_Atomic (Component_Type (Typ))
               then
                  Error_Pragma
                    ("?pragma% ignored, cannot pack atomic components");

               elsif not Rep_Item_Too_Late (Typ, N) then
                  Set_Is_Packed            (Base_Type (Typ));
                  Set_Has_Pragma_Pack      (Base_Type (Typ));
                  Set_Has_Non_Standard_Rep (Base_Type (Typ));
               end if;

            --  Record type. For record types, the pack is always effective

            else pragma Assert (Is_Record_Type (Typ));
               if not Rep_Item_Too_Late (Typ, N) then
                  Set_Has_Pragma_Pack      (Base_Type (Typ));
                  Set_Is_Packed            (Base_Type (Typ));
                  Set_Has_Non_Standard_Rep (Base_Type (Typ));
               end if;
            end if;
         end Pack;

         ----------
         -- Page --
         ----------

         --  pragma Page;

         --  There is nothing to do here, since we did all the processing
         --  for this pragma in Par.Prag (so that it works properly even in
         --  syntax only mode)

         when Pragma_Page =>
            null;

         -------------
         -- Passive --
         -------------

         --  pragma Passive [(PASSIVE_FORM)];

         --   PASSIVE_FORM ::= Semaphore | No

         when Pragma_Passive =>
            GNAT_Pragma;

            if Nkind (Parent (N)) /= N_Task_Definition then
               Error_Pragma ("pragma% must be within task definition");
            end if;

            if Arg_Count /= 0 then
               Check_Arg_Count (1);
               Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
            end if;

         -------------
         -- Polling --
         -------------

         --  pragma Polling (ON | OFF);

         when Pragma_Polling =>
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_No_Identifiers;
            Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
            Polling_Required := (Chars (Expression (Arg1)) = Name_On);

         ---------------------
         -- Persistent_Data --
         ---------------------

         when Pragma_Persistent_Data => declare
            Ent : Entity_Id;

         begin
            --  Register the pragma as applying to the compilation unit.
            --  Individual Persistent_Object pragmas for relevant objects
            --  are generated the end of the compilation.

            GNAT_Pragma;
            Check_Valid_Configuration_Pragma;
            Check_Arg_Count (0);
            Ent := Find_Lib_Unit_Name;
            Set_Is_Preelaborated (Ent);
         end;

         -----------------------
         -- Persistent_Object --
         -----------------------

         when Pragma_Persistent_Object => declare
            Decl : Node_Id;
            Ent  : Entity_Id;
            MA   : Node_Id;
            Str  : String_Id;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Arg_Is_Library_Level_Local_Name (Arg1);

            if not Is_Entity_Name (Expression (Arg1))
              or else
               (Ekind (Entity (Expression (Arg1))) /= E_Variable
                 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
            then
               Error_Pragma_Arg ("pragma only applies to objects", Arg1);
            end if;

            Ent := Entity (Expression (Arg1));
            Decl := Parent (Ent);

            if Nkind (Decl) /= N_Object_Declaration then
               return;
            end if;

            --  Placement of the object depends on whether there is
            --  an initial value or none. If the No_Initialization flag
            --  is set, the initialization has been transformed into
            --  assignments, which is disallowed elaboration code.

            if No_Initialization (Decl) then
               Error_Msg_N
                 ("initialization for persistent object"
                   &  "must be static expression", Decl);
               return;
            end if;

            if No (Expression (Decl)) then
               Start_String;
               Store_String_Chars ("section ("".persistent.bss"")");
               Str := End_String;

            else
               if not Is_OK_Static_Expression (Expression (Decl)) then
                  Flag_Non_Static_Expr
                    ("initialization for persistent object"
                      &  "must be static expression!", Expression (Decl));
                  return;
               end if;

               Start_String;
               Store_String_Chars ("section ("".persistent.data"")");
               Str := End_String;
            end if;

            MA :=
               Make_Pragma
                 (Sloc (N),
                  Name_Machine_Attribute,
                  New_List
                    (Make_Pragma_Argument_Association
                       (Sloc => Sloc (Arg1),
                        Expression => New_Occurrence_Of (Ent, Sloc (Ent))),
                     Make_Pragma_Argument_Association
                       (Sloc => Sloc (Arg1),
                        Expression =>
                          Make_String_Literal
                            (Sloc => Sloc (Arg1),
                             Strval => Str))));

            Insert_After (N, MA);
            Analyze (MA);
            Set_Has_Gigi_Rep_Item (Ent);
         end;

         ------------------
         -- Preelaborate --
         ------------------

         --  pragma Preelaborate [(library_unit_NAME)];

         --  Set the flag Is_Preelaborated of program unit name entity

         when Pragma_Preelaborate => Preelaborate : declare
            Pa  : constant Node_Id   := Parent (N);
            Pk  : constant Node_Kind := Nkind (Pa);
            Ent : Entity_Id;

         begin
            Check_Ada_83_Warning;
            Check_Valid_Library_Unit_Pragma;

            if Nkind (N) = N_Null_Statement then
               return;
            end if;

            Ent := Find_Lib_Unit_Name;

            --  This filters out pragmas inside generic parent then
            --  show up inside instantiation

            if Present (Ent)
              and then not (Pk = N_Package_Specification
                             and then Present (Generic_Parent (Pa)))
            then
               if not Debug_Flag_U then
                  Set_Is_Preelaborated (Ent);
                  Set_Suppress_Elaboration_Warnings (Ent);
               end if;
            end if;
         end Preelaborate;

         --------------
         -- Priority --
         --------------

         --  pragma Priority (EXPRESSION);

         when Pragma_Priority => Priority : declare
            P   : constant Node_Id := Parent (N);
            Arg : Node_Id;

         begin
            Check_No_Identifiers;
            Check_Arg_Count (1);

            --  Subprogram case

            if Nkind (P) = N_Subprogram_Body then
               Check_In_Main_Program;

               Arg := Expression (Arg1);
               Analyze_And_Resolve (Arg, Standard_Integer);

               --  Must be static

               if not Is_Static_Expression (Arg) then
                  Flag_Non_Static_Expr
                    ("main subprogram priority is not static!", Arg);
                  raise Pragma_Exit;

               --  If constraint error, then we already signalled an error

               elsif Raises_Constraint_Error (Arg) then
                  null;

               --  Otherwise check in range

               else
                  declare
                     Val : constant Uint := Expr_Value (Arg);

                  begin
                     if Val < 0
                       or else Val > Expr_Value (Expression
                                       (Parent (RTE (RE_Max_Priority))))
                     then
                        Error_Pragma_Arg
                          ("main subprogram priority is out of range", Arg1);
                     end if;
                  end;
               end if;

               Set_Main_Priority
                 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));

            --  Task or Protected, must be of type Integer

            elsif Nkind (P) = N_Protected_Definition
                    or else
                  Nkind (P) = N_Task_Definition
            then
               Arg := Expression (Arg1);

               --  The expression must be analyzed in the special manner
               --  described in "Handling of Default and Per-Object
               --  Expressions" in sem.ads.

               Analyze_Per_Use_Expression (Arg, Standard_Integer);

               if not Is_Static_Expression (Arg) then
                  Check_Restriction (Static_Priorities, Arg);
               end if;

            --  Anything else is incorrect

            else
               Pragma_Misplaced;
            end if;

            if Has_Priority_Pragma (P) then
               Error_Pragma ("duplicate pragma% not allowed");
            else
               Set_Has_Priority_Pragma (P, True);

               if Nkind (P) = N_Protected_Definition
                    or else
                  Nkind (P) = N_Task_Definition
               then
                  Record_Rep_Item (Defining_Identifier (Parent (P)), N);
                  --  exp_ch9 should use this ???
               end if;
            end if;
         end Priority;

         -------------
         -- Profile --
         -------------

         --  pragma Profile (profile_IDENTIFIER);

         --  profile_IDENTIFIER => Protected | Ravenscar

         when Pragma_Profile =>
            Check_Arg_Count (1);
            Check_Valid_Configuration_Pragma;
            Check_No_Identifiers;

            declare
               Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
            begin
               if Chars (Argx) = Name_Ravenscar then
                  Set_Ravenscar_Profile (N);

               elsif Chars (Argx) = Name_Restricted then
                  Set_Profile_Restrictions (Restricted, N, Warn => False);
               else
                  Error_Pragma_Arg ("& is not a valid profile", Argx);
               end if;
            end;

         ----------------------
         -- Profile_Warnings --
         ----------------------

         --  pragma Profile_Warnings (profile_IDENTIFIER);

         --  profile_IDENTIFIER => Protected | Ravenscar

         when Pragma_Profile_Warnings =>
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Valid_Configuration_Pragma;
            Check_No_Identifiers;

            declare
               Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
            begin
               if Chars (Argx) = Name_Ravenscar then
                  Set_Profile_Restrictions (Ravenscar, N, Warn => True);

               elsif Chars (Argx) = Name_Restricted then
                  Set_Profile_Restrictions (Restricted, N, Warn => True);
               else
                  Error_Pragma_Arg ("& is not a valid profile", Argx);
               end if;
            end;

         --------------------------
         -- Propagate_Exceptions --
         --------------------------

         --  pragma Propagate_Exceptions;

         when Pragma_Propagate_Exceptions =>
            GNAT_Pragma;
            Check_Arg_Count (0);

            if In_Extended_Main_Source_Unit (N) then
               Propagate_Exceptions := True;
            end if;

         ------------------
         -- Psect_Object --
         ------------------

         --  pragma Psect_Object (
         --        [Internal =>] LOCAL_NAME,
         --     [, [External =>] EXTERNAL_SYMBOL]
         --     [, [Size     =>] EXTERNAL_SYMBOL]);

         when Pragma_Psect_Object | Pragma_Common_Object =>
         Psect_Object : declare
            Args  : Args_List (1 .. 3);
            Names : constant Name_List (1 .. 3) := (
                      Name_Internal,
                      Name_External,
                      Name_Size);

            Internal : Node_Id renames Args (1);
            External : Node_Id renames Args (2);
            Size     : Node_Id renames Args (3);

            R_Internal : Node_Id;
            R_External : Node_Id;

            MA       : Node_Id;
            Str      : String_Id;

            Def_Id   : Entity_Id;

            procedure Check_Too_Long (Arg : Node_Id);
            --  Posts message if the argument is an identifier with more
            --  than 31 characters, or a string literal with more than
            --  31 characters, and we are operating under VMS

            --------------------
            -- Check_Too_Long --
            --------------------

            procedure Check_Too_Long (Arg : Node_Id) is
               X : constant Node_Id := Original_Node (Arg);

            begin
               if Nkind (X) /= N_String_Literal
                    and then
                  Nkind (X) /= N_Identifier
               then
                  Error_Pragma_Arg
                    ("inappropriate argument for pragma %", Arg);
               end if;

               if OpenVMS_On_Target then
                  if (Nkind (X) = N_String_Literal
                       and then String_Length (Strval (X)) > 31)
                    or else
                     (Nkind (X) = N_Identifier
                       and then Length_Of_Name (Chars (X)) > 31)
                  then
                     Error_Pragma_Arg
                       ("argument for pragma % is longer than 31 characters",
                        Arg);
                  end if;
               end if;
            end Check_Too_Long;

         --  Start of processing for Common_Object/Psect_Object

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);
            Process_Extended_Import_Export_Internal_Arg (Internal);

            R_Internal := Relocate_Node (Internal);

            Def_Id := Entity (R_Internal);

            if Ekind (Def_Id) /= E_Constant
              and then Ekind (Def_Id) /= E_Variable
            then
               Error_Pragma_Arg
                 ("pragma% must designate an object", Internal);
            end if;

            Check_Too_Long (R_Internal);

            if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
               Error_Pragma_Arg
                 ("cannot use pragma% for imported/exported object",
                  R_Internal);
            end if;

            if Is_Concurrent_Type (Etype (R_Internal)) then
               Error_Pragma_Arg
                 ("cannot specify pragma % for task/protected object",
                  R_Internal);
            end if;

            if Is_Psected (Def_Id) then
               Error_Msg_N ("?duplicate Psect_Object pragma", N);
            else
               Set_Is_Psected (Def_Id);
            end if;

            if Ekind (Def_Id) = E_Constant then
               Error_Pragma_Arg
                 ("cannot specify pragma % for a constant", R_Internal);
            end if;

            if Is_Record_Type (Etype (R_Internal)) then
               declare
                  Ent  : Entity_Id;
                  Decl : Entity_Id;

               begin
                  Ent := First_Entity (Etype (R_Internal));
                  while Present (Ent) loop
                     Decl := Declaration_Node (Ent);

                     if Ekind (Ent) = E_Component
                       and then Nkind (Decl) = N_Component_Declaration
                       and then Present (Expression (Decl))
                       and then Warn_On_Export_Import
                     then
                        Error_Msg_N
                          ("?object for pragma % has defaults", R_Internal);
                        exit;

                     else
                        Next_Entity (Ent);
                     end if;
                  end loop;
               end;
            end if;

            if Present (Size) then
               Check_Too_Long (Size);
            end if;

            --  Make Psect case-insensitive.

            if Present (External) then
               Check_Too_Long (External);

               if Nkind (External) = N_String_Literal then
                  String_To_Name_Buffer (Strval (External));
               else
                  Get_Name_String (Chars (External));
               end if;

               Set_All_Upper_Case;
               Start_String;
               Store_String_Chars (Name_Buffer (1 .. Name_Len));
               Str := End_String;
               R_External := Make_String_Literal
                 (Sloc => Sloc (External), Strval => Str);
            else
               Get_Name_String (Chars (Internal));
               Set_All_Upper_Case;
               Start_String;
               Store_String_Chars (Name_Buffer (1 .. Name_Len));
               Str := End_String;
               R_External := Make_String_Literal
                 (Sloc => Sloc (Internal), Strval => Str);
            end if;

            --  Transform into pragma Linker_Section, add attributes to
            --  match what DEC Ada does. Ignore size for now?

            Rewrite (N,
               Make_Pragma
                 (Sloc (N),
                  Name_Linker_Section,
                  New_List
                    (Make_Pragma_Argument_Association
                       (Sloc => Sloc (R_Internal),
                        Expression => R_Internal),
                     Make_Pragma_Argument_Association
                       (Sloc => Sloc (R_External),
                        Expression => R_External))));

            Analyze (N);

            --  Add Machine_Attribute of "overlaid", so the section overlays
            --  other sections of the same name.

            Start_String;
            Store_String_Chars ("overlaid");
            Str := End_String;

            MA :=
               Make_Pragma
                 (Sloc (N),
                  Name_Machine_Attribute,
                  New_List
                    (Make_Pragma_Argument_Association
                       (Sloc => Sloc (R_Internal),
                        Expression => R_Internal),
                     Make_Pragma_Argument_Association
                       (Sloc => Sloc (R_External),
                        Expression =>
                          Make_String_Literal
                            (Sloc => Sloc (R_External),
                             Strval => Str))));
            Analyze (MA);

            --  Add Machine_Attribute of "global", so the section is visible
            --  everywhere

            Start_String;
            Store_String_Chars ("global");
            Str := End_String;

            MA :=
               Make_Pragma
                 (Sloc (N),
                  Name_Machine_Attribute,
                  New_List
                    (Make_Pragma_Argument_Association
                       (Sloc => Sloc (R_Internal),
                        Expression => R_Internal),

                     Make_Pragma_Argument_Association
                       (Sloc => Sloc (R_External),
                        Expression =>
                          Make_String_Literal
                            (Sloc => Sloc (R_External),
                             Strval => Str))));
            Analyze (MA);

            --  Add Machine_Attribute of "initialize", so the section is
            --  demand zeroed.

            Start_String;
            Store_String_Chars ("initialize");
            Str := End_String;

            MA :=
               Make_Pragma
                 (Sloc (N),
                  Name_Machine_Attribute,
                  New_List
                    (Make_Pragma_Argument_Association
                       (Sloc => Sloc (R_Internal),
                        Expression => R_Internal),

                     Make_Pragma_Argument_Association
                       (Sloc => Sloc (R_External),
                        Expression =>
                          Make_String_Literal
                            (Sloc => Sloc (R_External),
                             Strval => Str))));
            Analyze (MA);
         end Psect_Object;

         ----------
         -- Pure --
         ----------

         --  pragma Pure [(library_unit_NAME)];

         when Pragma_Pure => Pure : declare
            Ent : Entity_Id;
         begin
            Check_Ada_83_Warning;
            Check_Valid_Library_Unit_Pragma;

            if Nkind (N) = N_Null_Statement then
               return;
            end if;

            Ent := Find_Lib_Unit_Name;
            Set_Is_Pure (Ent);
            Set_Suppress_Elaboration_Warnings (Ent);
         end Pure;

         -------------------
         -- Pure_Function --
         -------------------

         --  pragma Pure_Function ([Entity =>] function_LOCAL_NAME);

         when Pragma_Pure_Function => Pure_Function : declare
            E_Id      : Node_Id;
            E         : Entity_Id;
            Def_Id    : Entity_Id;
            Effective : Boolean := False;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Arg_Is_Local_Name (Arg1);
            E_Id := Expression (Arg1);

            if Error_Posted (E_Id) then
               return;
            end if;

            --  Loop through homonyms (overloadings) of referenced entity

            E := Entity (E_Id);

            if Present (E) then
               loop
                  Def_Id := Get_Base_Subprogram (E);

                  if Ekind (Def_Id) /= E_Function
                    and then Ekind (Def_Id) /= E_Generic_Function
                    and then Ekind (Def_Id) /= E_Operator
                  then
                     Error_Pragma_Arg
                       ("pragma% requires a function name", Arg1);
                  end if;

                  Set_Is_Pure (Def_Id);

                  if not Has_Pragma_Pure_Function (Def_Id) then
                     Set_Has_Pragma_Pure_Function (Def_Id);
                     Effective := True;
                  end if;

                  E := Homonym (E);
                  exit when No (E) or else Scope (E) /= Current_Scope;
               end loop;

               if not Effective
                 and then Warn_On_Redundant_Constructs
               then
                  Error_Msg_NE ("pragma Pure_Function on& is redundant?",
                    N, Entity (E_Id));
               end if;
            end if;
         end Pure_Function;

         --------------------
         -- Queuing_Policy --
         --------------------

         --  pragma Queuing_Policy (policy_IDENTIFIER);

         when Pragma_Queuing_Policy => declare
            QP : Character;

         begin
            Check_Ada_83_Warning;
            Check_Arg_Count (1);
            Check_No_Identifiers;
            Check_Arg_Is_Queuing_Policy (Arg1);
            Check_Valid_Configuration_Pragma;
            Get_Name_String (Chars (Expression (Arg1)));
            QP := Fold_Upper (Name_Buffer (1));

            if Queuing_Policy /= ' '
              and then Queuing_Policy /= QP
            then
               Error_Msg_Sloc := Queuing_Policy_Sloc;
               Error_Pragma ("queuing policy incompatible with policy#");

            --  Set new policy, but always preserve System_Location since
            --  we like the error message with the run time name.

            else
               Queuing_Policy := QP;

               if Queuing_Policy_Sloc /= System_Location then
                  Queuing_Policy_Sloc := Loc;
               end if;
            end if;
         end;

         ---------------------------
         -- Remote_Call_Interface --
         ---------------------------

         --  pragma Remote_Call_Interface [(library_unit_NAME)];

         when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
            Cunit_Node : Node_Id;
            Cunit_Ent  : Entity_Id;
            K          : Node_Kind;

         begin
            Check_Ada_83_Warning;
            Check_Valid_Library_Unit_Pragma;

            if Nkind (N) = N_Null_Statement then
               return;
            end if;

            Cunit_Node := Cunit (Current_Sem_Unit);
            K          := Nkind (Unit (Cunit_Node));
            Cunit_Ent  := Cunit_Entity (Current_Sem_Unit);

            if K = N_Package_Declaration
              or else K = N_Generic_Package_Declaration
              or else K = N_Subprogram_Declaration
              or else K = N_Generic_Subprogram_Declaration
              or else (K = N_Subprogram_Body
                         and then Acts_As_Spec (Unit (Cunit_Node)))
            then
               null;
            else
               Error_Pragma (
                 "pragma% must apply to package or subprogram declaration");
            end if;

            Set_Is_Remote_Call_Interface (Cunit_Ent);
         end Remote_Call_Interface;

         ------------------
         -- Remote_Types --
         ------------------

         --  pragma Remote_Types [(library_unit_NAME)];

         when Pragma_Remote_Types => Remote_Types : declare
            Cunit_Node : Node_Id;
            Cunit_Ent  : Entity_Id;

         begin
            Check_Ada_83_Warning;
            Check_Valid_Library_Unit_Pragma;

            if Nkind (N) = N_Null_Statement then
               return;
            end if;

            Cunit_Node := Cunit (Current_Sem_Unit);
            Cunit_Ent  := Cunit_Entity (Current_Sem_Unit);

            if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
              and then
              Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
            then
               Error_Pragma (
                 "pragma% can only apply to a package declaration");
            end if;

            Set_Is_Remote_Types (Cunit_Ent);
         end Remote_Types;

         ---------------
         -- Ravenscar --
         ---------------

         --  pragma Ravenscar;

         when Pragma_Ravenscar =>
            GNAT_Pragma;
            Check_Arg_Count (0);
            Check_Valid_Configuration_Pragma;
            Set_Ravenscar_Profile (N);

            if Warn_On_Obsolescent_Feature then
               Error_Msg_N
                 ("pragma Ravenscar is an obsolescent feature?", N);
               Error_Msg_N
                 ("|use pragma Profile (Ravenscar) instead", N);
            end if;

         -------------------------
         -- Restricted_Run_Time --
         -------------------------

         --  pragma Restricted_Run_Time;

         when Pragma_Restricted_Run_Time =>
            GNAT_Pragma;
            Check_Arg_Count (0);
            Check_Valid_Configuration_Pragma;
            Set_Profile_Restrictions (Restricted, N, Warn => False);

            if Warn_On_Obsolescent_Feature then
               Error_Msg_N
                 ("pragma Restricted_Run_Time is an obsolescent feature?", N);
               Error_Msg_N
                 ("|use pragma Profile (Restricted) instead", N);
            end if;

         ------------------
         -- Restrictions --
         ------------------

         --  pragma Restrictions (RESTRICTION {, RESTRICTION});

         --  RESTRICTION ::=
         --    restriction_IDENTIFIER
         --  | restriction_parameter_IDENTIFIER => EXPRESSION

         when Pragma_Restrictions =>
            Process_Restrictions_Or_Restriction_Warnings;

         --------------------------
         -- Restriction_Warnings --
         --------------------------

         --  pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});

         --  RESTRICTION ::=
         --    restriction_IDENTIFIER
         --  | restriction_parameter_IDENTIFIER => EXPRESSION

         when Pragma_Restriction_Warnings =>
            Process_Restrictions_Or_Restriction_Warnings;

         ----------------
         -- Reviewable --
         ----------------

         --  pragma Reviewable;

         when Pragma_Reviewable =>
            Check_Ada_83_Warning;
            Check_Arg_Count (0);

         -------------------
         -- Share_Generic --
         -------------------

         --  pragma Share_Generic (NAME {, NAME});

         when Pragma_Share_Generic =>
            GNAT_Pragma;
            Process_Generic_List;

         ------------
         -- Shared --
         ------------

         --  pragma Shared (LOCAL_NAME);

         when Pragma_Shared =>
            GNAT_Pragma;
            Process_Atomic_Shared_Volatile;

         --------------------
         -- Shared_Passive --
         --------------------

         --  pragma Shared_Passive [(library_unit_NAME)];

         --  Set the flag Is_Shared_Passive of program unit name entity

         when Pragma_Shared_Passive => Shared_Passive : declare
            Cunit_Node : Node_Id;
            Cunit_Ent  : Entity_Id;

         begin
            Check_Ada_83_Warning;
            Check_Valid_Library_Unit_Pragma;

            if Nkind (N) = N_Null_Statement then
               return;
            end if;

            Cunit_Node := Cunit (Current_Sem_Unit);
            Cunit_Ent  := Cunit_Entity (Current_Sem_Unit);

            if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
              and then
              Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
            then
               Error_Pragma (
                 "pragma% can only apply to a package declaration");
            end if;

            Set_Is_Shared_Passive (Cunit_Ent);
         end Shared_Passive;

         ----------------------
         -- Source_File_Name --
         ----------------------

         --  There are five forms for this pragma:

         --  pragma Source_File_Name (
         --    [UNIT_NAME      =>] unit_NAME,
         --     BODY_FILE_NAME =>  STRING_LITERAL
         --    [, [INDEX =>] INTEGER_LITERAL]);

         --  pragma Source_File_Name (
         --    [UNIT_NAME      =>] unit_NAME,
         --     SPEC_FILE_NAME =>  STRING_LITERAL
         --    [, [INDEX =>] INTEGER_LITERAL]);

         --  pragma Source_File_Name (
         --     BODY_FILE_NAME  => STRING_LITERAL
         --  [, DOT_REPLACEMENT => STRING_LITERAL]
         --  [, CASING          => CASING_SPEC]);

         --  pragma Source_File_Name (
         --     SPEC_FILE_NAME  => STRING_LITERAL
         --  [, DOT_REPLACEMENT => STRING_LITERAL]
         --  [, CASING          => CASING_SPEC]);

         --  pragma Source_File_Name (
         --     SUBUNIT_FILE_NAME  => STRING_LITERAL
         --  [, DOT_REPLACEMENT    => STRING_LITERAL]
         --  [, CASING             => CASING_SPEC]);

         --  CASING_SPEC ::= Uppercase | Lowercase | Mixedcase

         --  Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
         --  Source_File_Name (SFN), however their usage is exclusive:
         --  SFN can only be used when no project file is used, while
         --  SFNP can only be used when a project file is used.

         --  No processing here. Processing was completed during parsing,
         --  since we need to have file names set as early as possible.
         --  Units are loaded well before semantic processing starts.

         --  The only processing we defer to this point is the check
         --  for correct placement.

         when Pragma_Source_File_Name =>
            GNAT_Pragma;
            Check_Valid_Configuration_Pragma;

         ------------------------------
         -- Source_File_Name_Project --
         ------------------------------

         --  See Source_File_Name for syntax

         --  No processing here. Processing was completed during parsing,
         --  since we need to have file names set as early as possible.
         --  Units are loaded well before semantic processing starts.

         --  The only processing we defer to this point is the check
         --  for correct placement.

         when Pragma_Source_File_Name_Project =>
            GNAT_Pragma;
            Check_Valid_Configuration_Pragma;

            --  Check that a pragma Source_File_Name_Project is used only
            --  in a configuration pragmas file.

            --  Pragmas Source_File_Name_Project should only be generated
            --  by the Project Manager in configuration pragmas files.

            --  This is really an ugly test. It seems to depend on some
            --  accidental and undocumented property. At the very least
            --  it needs to be documented, but it would be better to have
            --  a clean way of testing if we are in a configuration file???

            if Present (Parent (N)) then
               Error_Pragma
                 ("pragma% can only appear in a configuration pragmas file");
            end if;

         ----------------------
         -- Source_Reference --
         ----------------------

         --  pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);

         --  Nothing to do, all processing completed in Par.Prag, since we
         --  need the information for possible parser messages that are output

         when Pragma_Source_Reference =>
            GNAT_Pragma;

         ------------------
         -- Storage_Size --
         ------------------

         --  pragma Storage_Size (EXPRESSION);

         when Pragma_Storage_Size => Storage_Size : declare
            P   : constant Node_Id := Parent (N);
            Arg : Node_Id;

         begin
            Check_No_Identifiers;
            Check_Arg_Count (1);

            --  The expression must be analyzed in the special manner
            --  described in "Handling of Default Expressions" in sem.ads.

            --  Set In_Default_Expression for per-object case ???

            Arg := Expression (Arg1);
            Analyze_Per_Use_Expression (Arg, Any_Integer);

            if not Is_Static_Expression (Arg) then
               Check_Restriction (Static_Storage_Size, Arg);
            end if;

            if Nkind (P) /= N_Task_Definition then
               Pragma_Misplaced;
               return;

            else
               if Has_Storage_Size_Pragma (P) then
                  Error_Pragma ("duplicate pragma% not allowed");
               else
                  Set_Has_Storage_Size_Pragma (P, True);
               end if;

               Record_Rep_Item (Defining_Identifier (Parent (P)), N);
               --  ???  exp_ch9 should use this!
            end if;
         end Storage_Size;

         ------------------
         -- Storage_Unit --
         ------------------

         --  pragma Storage_Unit (NUMERIC_LITERAL);

         --  Only permitted argument is System'Storage_Unit value

         when Pragma_Storage_Unit =>
            Check_No_Identifiers;
            Check_Arg_Count (1);
            Check_Arg_Is_Integer_Literal (Arg1);

            if Intval (Expression (Arg1)) /=
              UI_From_Int (Ttypes.System_Storage_Unit)
            then
               Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
               Error_Pragma_Arg
                 ("the only allowed argument for pragma% is ^", Arg1);
            end if;

         --------------------
         -- Stream_Convert --
         --------------------

         --  pragma Stream_Convert (
         --    [Entity =>] type_LOCAL_NAME,
         --    [Read   =>] function_NAME,
         --    [Write  =>] function NAME);

         when Pragma_Stream_Convert => Stream_Convert : declare

            procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
            --  Check that the given argument is the name of a local
            --  function of one argument that is not overloaded earlier
            --  in the current local scope. A check is also made that the
            --  argument is a function with one parameter.

            --------------------------------------
            -- Check_OK_Stream_Convert_Function --
            --------------------------------------

            procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
               Ent : Entity_Id;

            begin
               Check_Arg_Is_Local_Name (Arg);
               Ent := Entity (Expression (Arg));

               if Has_Homonym (Ent) then
                  Error_Pragma_Arg
                    ("argument for pragma% may not be overloaded", Arg);
               end if;

               if Ekind (Ent) /= E_Function
                 or else No (First_Formal (Ent))
                 or else Present (Next_Formal (First_Formal (Ent)))
               then
                  Error_Pragma_Arg
                    ("argument for pragma% must be" &
                     " function of one argument", Arg);
               end if;
            end Check_OK_Stream_Convert_Function;

         --  Start of procecessing for Stream_Convert

         begin
            GNAT_Pragma;
            Check_Arg_Count (3);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Optional_Identifier (Arg2, Name_Read);
            Check_Optional_Identifier (Arg3, Name_Write);
            Check_Arg_Is_Local_Name (Arg1);
            Check_OK_Stream_Convert_Function (Arg2);
            Check_OK_Stream_Convert_Function (Arg3);

            declare
               Typ   : constant Entity_Id :=
                         Underlying_Type (Entity (Expression (Arg1)));
               Read  : constant Entity_Id := Entity (Expression (Arg2));
               Write : constant Entity_Id := Entity (Expression (Arg3));

            begin
               if Etype (Typ) = Any_Type
                    or else
                  Etype (Read) = Any_Type
                    or else
                  Etype (Write) = Any_Type
               then
                  return;
               end if;

               Check_First_Subtype (Arg1);

               if Rep_Item_Too_Early (Typ, N)
                    or else
                  Rep_Item_Too_Late (Typ, N)
               then
                  return;
               end if;

               if Underlying_Type (Etype (Read)) /= Typ then
                  Error_Pragma_Arg
                    ("incorrect return type for function&", Arg2);
               end if;

               if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
                  Error_Pragma_Arg
                    ("incorrect parameter type for function&", Arg3);
               end if;

               if Underlying_Type (Etype (First_Formal (Read))) /=
                  Underlying_Type (Etype (Write))
               then
                  Error_Pragma_Arg
                    ("result type of & does not match Read parameter type",
                     Arg3);
               end if;
            end;
         end Stream_Convert;

         -------------------------
         -- Style_Checks (GNAT) --
         -------------------------

         --  pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);

         --  This is processed by the parser since some of the style
         --  checks take place during source scanning and parsing. This
         --  means that we don't need to issue error messages here.

         when Pragma_Style_Checks => Style_Checks : declare
            A  : constant Node_Id   := Expression (Arg1);
            S  : String_Id;
            C  : Char_Code;

         begin
            GNAT_Pragma;
            Check_No_Identifiers;

            --  Two argument form

            if Arg_Count = 2 then
               Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);

               declare
                  E_Id : Node_Id;
                  E    : Entity_Id;

               begin
                  E_Id := Expression (Arg2);
                  Analyze (E_Id);

                  if not Is_Entity_Name (E_Id) then
                     Error_Pragma_Arg
                       ("second argument of pragma% must be entity name",
                        Arg2);
                  end if;

                  E := Entity (E_Id);

                  if E = Any_Id then
                     return;
                  else
                     loop
                        Set_Suppress_Style_Checks (E,
                          (Chars (Expression (Arg1)) = Name_Off));
                        exit when No (Homonym (E));
                        E := Homonym (E);
                     end loop;
                  end if;
               end;

            --  One argument form

            else
               Check_Arg_Count (1);

               if Nkind (A) = N_String_Literal then
                  S   := Strval (A);

                  declare
                     Slen    : constant Natural := Natural (String_Length (S));
                     Options : String (1 .. Slen);
                     J       : Natural;

                  begin
                     J := 1;
                     loop
                        C := Get_String_Char (S, Int (J));
                        exit when not In_Character_Range (C);
                        Options (J) := Get_Character (C);

                        if J = Slen then
                           Set_Style_Check_Options (Options);
                           exit;
                        else
                           J := J + 1;
                        end if;
                     end loop;
                  end;

               elsif Nkind (A) = N_Identifier then

                  if Chars (A) = Name_All_Checks then
                     Set_Default_Style_Check_Options;

                  elsif Chars (A) = Name_On then
                     Style_Check := True;

                  elsif Chars (A) = Name_Off then
                     Style_Check := False;

                  end if;
               end if;
            end if;
         end Style_Checks;

         --------------
         -- Subtitle --
         --------------

         --  pragma Subtitle ([Subtitle =>] STRING_LITERAL);

         when Pragma_Subtitle =>
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Optional_Identifier (Arg1, Name_Subtitle);
            Check_Arg_Is_String_Literal (Arg1);

         --------------
         -- Suppress --
         --------------

         --  pragma Suppress (IDENTIFIER [, [On =>] NAME]);

         when Pragma_Suppress =>
            Process_Suppress_Unsuppress (True);

         ------------------
         -- Suppress_All --
         ------------------

         --  pragma Suppress_All;

         --  The only check made here is that the pragma appears in the
         --  proper place, i.e. following a compilation unit. If indeed
         --  it appears in this context, then the parser has already
         --  inserted an equivalent pragma Suppress (All_Checks) to get
         --  the required effect.

         when Pragma_Suppress_All =>
            GNAT_Pragma;
            Check_Arg_Count (0);

            if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
              or else not Is_List_Member (N)
              or else List_Containing (N) /= Pragmas_After (Parent (N))
            then
               Error_Pragma
                 ("misplaced pragma%, must follow compilation unit");
            end if;

         -------------------------
         -- Suppress_Debug_Info --
         -------------------------

         --  pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);

         when Pragma_Suppress_Debug_Info =>
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Arg_Is_Local_Name (Arg1);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));

         ----------------------------------
         -- Suppress_Exception_Locations --
         ----------------------------------

         --  pragma Suppress_Exception_Locations;

         when Pragma_Suppress_Exception_Locations =>
            GNAT_Pragma;
            Check_Arg_Count (0);
            Check_Valid_Configuration_Pragma;
            Exception_Locations_Suppressed := True;

         -----------------------------
         -- Suppress_Initialization --
         -----------------------------

         --  pragma Suppress_Initialization ([Entity =>] type_Name);

         when Pragma_Suppress_Initialization => Suppress_Init : declare
            E_Id : Node_Id;
            E    : Entity_Id;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Arg_Is_Local_Name (Arg1);

            E_Id := Expression (Arg1);

            if Etype (E_Id) = Any_Type then
               return;
            end if;

            E := Entity (E_Id);

            if Is_Type (E) then
               if Is_Incomplete_Or_Private_Type (E) then
                  if No (Full_View (Base_Type (E))) then
                     Error_Pragma_Arg
                       ("argument of pragma% cannot be an incomplete type",
                         Arg1);
                  else
                     Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
                  end if;
               else
                  Set_Suppress_Init_Proc (Base_Type (E));
               end if;

            else
               Error_Pragma_Arg
                 ("pragma% requires argument that is a type name", Arg1);
            end if;
         end Suppress_Init;

         -----------------
         -- System_Name --
         -----------------

         --  pragma System_Name (DIRECT_NAME);

         --  Syntax check: one argument, which must be the identifier GNAT
         --  or the identifier GCC, no other identifiers are acceptable.

         when Pragma_System_Name =>
            Check_No_Identifiers;
            Check_Arg_Count (1);
            Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);

         -----------------------------
         -- Task_Dispatching_Policy --
         -----------------------------

         --  pragma Task_Dispatching_Policy (policy_IDENTIFIER);

         when Pragma_Task_Dispatching_Policy => declare
            DP : Character;

         begin
            Check_Ada_83_Warning;
            Check_Arg_Count (1);
            Check_No_Identifiers;
            Check_Arg_Is_Task_Dispatching_Policy (Arg1);
            Check_Valid_Configuration_Pragma;
            Get_Name_String (Chars (Expression (Arg1)));
            DP := Fold_Upper (Name_Buffer (1));

            if Task_Dispatching_Policy /= ' '
              and then Task_Dispatching_Policy /= DP
            then
               Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
               Error_Pragma
                 ("task dispatching policy incompatible with policy#");

            --  Set new policy, but always preserve System_Location since
            --  we like the error message with the run time name.

            else
               Task_Dispatching_Policy := DP;

               if Task_Dispatching_Policy_Sloc /= System_Location then
                  Task_Dispatching_Policy_Sloc := Loc;
               end if;
            end if;
         end;

         --------------
         -- Task_Info --
         --------------

         --  pragma Task_Info (EXPRESSION);

         when Pragma_Task_Info => Task_Info : declare
            P : constant Node_Id := Parent (N);

         begin
            GNAT_Pragma;

            if Nkind (P) /= N_Task_Definition then
               Error_Pragma ("pragma% must appear in task definition");
            end if;

            Check_No_Identifiers;
            Check_Arg_Count (1);

            Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));

            if Etype (Expression (Arg1)) = Any_Type then
               return;
            end if;

            if Has_Task_Info_Pragma (P) then
               Error_Pragma ("duplicate pragma% not allowed");
            else
               Set_Has_Task_Info_Pragma (P, True);
            end if;
         end Task_Info;

         ---------------
         -- Task_Name --
         ---------------

         --  pragma Task_Name (string_EXPRESSION);

         when Pragma_Task_Name => Task_Name : declare
         --  pragma Priority (EXPRESSION);

            P   : constant Node_Id := Parent (N);
            Arg : Node_Id;

         begin
            Check_No_Identifiers;
            Check_Arg_Count (1);

            Arg := Expression (Arg1);
            Analyze_And_Resolve (Arg, Standard_String);

            if Nkind (P) /= N_Task_Definition then
               Pragma_Misplaced;
            end if;

            if Has_Task_Name_Pragma (P) then
               Error_Pragma ("duplicate pragma% not allowed");
            else
               Set_Has_Task_Name_Pragma (P, True);
               Record_Rep_Item (Defining_Identifier (Parent (P)), N);
            end if;
         end Task_Name;

         ------------------
         -- Task_Storage --
         ------------------

         --  pragma Task_Storage (
         --     [Task_Type =>] LOCAL_NAME,
         --     [Top_Guard =>] static_integer_EXPRESSION);

         when Pragma_Task_Storage => Task_Storage : declare
            Args  : Args_List (1 .. 2);
            Names : constant Name_List (1 .. 2) := (
                      Name_Task_Type,
                      Name_Top_Guard);

            Task_Type : Node_Id renames Args (1);
            Top_Guard : Node_Id renames Args (2);

            Ent : Entity_Id;

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);

            if No (Task_Type) then
               Error_Pragma
                 ("missing task_type argument for pragma%");
            end if;

            Check_Arg_Is_Local_Name (Task_Type);

            Ent := Entity (Task_Type);

            if not Is_Task_Type (Ent) then
               Error_Pragma_Arg
                 ("argument for pragma% must be task type", Task_Type);
            end if;

            if No (Top_Guard) then
               Error_Pragma_Arg
                 ("pragma% takes two arguments", Task_Type);
            else
               Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
            end if;

            Check_First_Subtype (Task_Type);

            if Rep_Item_Too_Late (Ent, N) then
               raise Pragma_Exit;
            end if;
         end Task_Storage;

         -----------------
         -- Thread_Body --
         -----------------

         --  pragma Thread_Body
         --    (  [Entity =>]               LOCAL_NAME
         --     [,[Secondary_Stack_Size =>] static_integer_EXPRESSION]);

         when Pragma_Thread_Body => Thread_Body : declare
            Id : Node_Id;
            SS : Node_Id;
            E  : Entity_Id;

         begin
            GNAT_Pragma;
            Check_At_Least_N_Arguments (1);
            Check_At_Most_N_Arguments (2);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Arg_Is_Local_Name (Arg1);

            Id := Expression (Arg1);

            if not Is_Entity_Name (Id)
              or else not Is_Subprogram (Entity (Id))
            then
               Error_Pragma_Arg ("subprogram name required", Arg1);
            end if;

            E := Entity (Id);

            --  Go to renamed subprogram if present, since Thread_Body applies
            --  to the actual renamed entity, not to the renaming entity.

            if Present (Alias (E))
              and then Nkind (Parent (Declaration_Node (E))) =
                         N_Subprogram_Renaming_Declaration
            then
               E := Alias (E);
            end if;

            --  Various error checks

            if Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body then
               Error_Pragma
                 ("pragma% requires separate spec and must come before body");

            elsif Rep_Item_Too_Early (E, N)
                 or else
               Rep_Item_Too_Late (E, N)
            then
               raise Pragma_Exit;

            elsif Is_Thread_Body (E) then
               Error_Pragma_Arg
                 ("only one thread body pragma allowed", Arg1);

            elsif Present (Homonym (E))
              and then Scope (Homonym (E)) = Current_Scope
            then
               Error_Pragma_Arg
                 ("thread body subprogram must not be overloaded", Arg1);
            end if;

            Set_Is_Thread_Body (E);

            --  Deal with secondary stack argument

            if Arg_Count = 2 then
               Check_Optional_Identifier (Arg2, Name_Secondary_Stack_Size);
               SS := Expression (Arg2);
               Analyze_And_Resolve (SS, Any_Integer);
            end if;
         end Thread_Body;

         ----------------
         -- Time_Slice --
         ----------------

         --  pragma Time_Slice (static_duration_EXPRESSION);

         when Pragma_Time_Slice => Time_Slice : declare
            Val : Ureal;
            Nod : Node_Id;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_No_Identifiers;
            Check_In_Main_Program;
            Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);

            if not Error_Posted (Arg1) then
               Nod := Next (N);
               while Present (Nod) loop
                  if Nkind (Nod) = N_Pragma
                    and then Chars (Nod) = Name_Time_Slice
                  then
                     Error_Msg_Name_1 := Chars (N);
                     Error_Msg_N ("duplicate pragma% not permitted", Nod);
                  end if;

                  Next (Nod);
               end loop;
            end if;

            --  Process only if in main unit

            if Get_Source_Unit (Loc) = Main_Unit then
               Opt.Time_Slice_Set := True;
               Val := Expr_Value_R (Expression (Arg1));

               if Val <= Ureal_0 then
                  Opt.Time_Slice_Value := 0;

               elsif Val > UR_From_Uint (UI_From_Int (1000)) then
                  Opt.Time_Slice_Value := 1_000_000_000;

               else
                  Opt.Time_Slice_Value :=
                    UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
               end if;
            end if;
         end Time_Slice;

         -----------
         -- Title --
         -----------

         --  pragma Title (TITLING_OPTION [, TITLING OPTION]);

         --   TITLING_OPTION ::=
         --     [Title =>] STRING_LITERAL
         --   | [Subtitle =>] STRING_LITERAL

         when Pragma_Title => Title : declare
            Args  : Args_List (1 .. 2);
            Names : constant Name_List (1 .. 2) := (
                      Name_Title,
                      Name_Subtitle);

         begin
            GNAT_Pragma;
            Gather_Associations (Names, Args);

            for J in 1 .. 2 loop
               if Present (Args (J)) then
                  Check_Arg_Is_String_Literal (Args (J));
               end if;
            end loop;
         end Title;

         ---------------------
         -- Unchecked_Union --
         ---------------------

         --  pragma Unchecked_Union (first_subtype_LOCAL_NAME)

         when Pragma_Unchecked_Union => Unchecked_Union : declare
            Assoc   : constant Node_Id := Arg1;
            Type_Id : constant Node_Id := Expression (Assoc);
            Typ     : Entity_Id;
            Discr   : Entity_Id;
            Tdef    : Node_Id;
            Clist   : Node_Id;
            Vpart   : Node_Id;
            Comp    : Node_Id;
            Variant : Node_Id;

         begin
            GNAT_Pragma;
            Check_No_Identifiers;
            Check_Arg_Count (1);
            Check_Arg_Is_Local_Name (Arg1);

            Find_Type (Type_Id);
            Typ := Entity (Type_Id);

            if Typ = Any_Type
              or else Rep_Item_Too_Early (Typ, N)
            then
               return;
            else
               Typ := Underlying_Type (Typ);
            end if;

            if Rep_Item_Too_Late (Typ, N) then
               return;
            end if;

            Check_First_Subtype (Arg1);

            --  Note remaining cases are references to a type in the current
            --  declarative part. If we find an error, we post the error on
            --  the relevant type declaration at an appropriate point.

            if not Is_Record_Type (Typ) then
               Error_Msg_N ("Unchecked_Union must be record type", Typ);
               return;

            elsif Is_Tagged_Type (Typ) then
               Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
               return;

            elsif Is_Limited_Type (Typ) then
               Error_Msg_N
                 ("Unchecked_Union must not be limited record type", Typ);
               Explain_Limited_Type (Typ, Typ);
               return;

            else
               if not Has_Discriminants (Typ) then
                  Error_Msg_N
                    ("Unchecked_Union must have one discriminant", Typ);
                  return;
               end if;

               Discr := First_Discriminant (Typ);

               if Present (Next_Discriminant (Discr)) then
                  Error_Msg_N
                    ("Unchecked_Union must have exactly one discriminant",
                     Next_Discriminant (Discr));
                  return;
               end if;

               if No (Discriminant_Default_Value (Discr)) then
                  Error_Msg_N
                    ("Unchecked_Union discriminant must have default value",
                     Discr);
               end if;

               Tdef  := Type_Definition (Declaration_Node (Typ));
               Clist := Component_List (Tdef);

               if No (Clist) or else No (Variant_Part (Clist)) then
                  Error_Msg_N
                    ("Unchecked_Union must have variant part",
                     Tdef);
                  return;
               end if;

               Vpart := Variant_Part (Clist);

               if Is_Non_Empty_List (Component_Items (Clist)) then
                  Error_Msg_N
                    ("components before variant not allowed " &
                     "in Unchecked_Union",
                     First (Component_Items (Clist)));
               end if;

               Variant := First (Variants (Vpart));
               while Present (Variant) loop
                  Clist := Component_List (Variant);

                  if Present (Variant_Part (Clist)) then
                     Error_Msg_N
                       ("Unchecked_Union may not have nested variants",
                        Variant_Part (Clist));
                  end if;

                  if not Is_Non_Empty_List (Component_Items (Clist)) then
                     Error_Msg_N
                       ("Unchecked_Union may not have empty component list",
                        Variant);
                     return;
                  end if;

                  Comp := First (Component_Items (Clist));

                  if Nkind (Comp) = N_Component_Declaration then

                     if Present (Expression (Comp)) then
                        Error_Msg_N
                          ("default initialization not allowed " &
                           "in Unchecked_Union",
                           Expression (Comp));
                     end if;

                     declare
                        Sindic : constant Node_Id :=
                          Subtype_Indication (Component_Definition (Comp));

                     begin
                        if Nkind (Sindic) = N_Subtype_Indication then
                           Check_Static_Constraint (Constraint (Sindic));
                        end if;
                     end;
                  end if;

                  if Present (Next (Comp)) then
                     Error_Msg_N
                       ("Unchecked_Union variant can have only one component",
                        Next (Comp));
                  end if;

                  Next (Variant);
               end loop;
            end if;

            Set_Is_Unchecked_Union  (Typ, True);
            Set_Convention          (Typ, Convention_C);

            Set_Has_Unchecked_Union (Base_Type (Typ), True);
            Set_Is_Unchecked_Union  (Base_Type (Typ), True);
         end Unchecked_Union;

         ------------------------
         -- Unimplemented_Unit --
         ------------------------

         --  pragma Unimplemented_Unit;

         --  Note: this only gives an error if we are generating code,
         --  or if we are in a generic library unit (where the pragma
         --  appears in the body, not in the spec).

         when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
            Cunitent : constant Entity_Id :=
                         Cunit_Entity (Get_Source_Unit (Loc));
            Ent_Kind : constant Entity_Kind :=
                         Ekind (Cunitent);

         begin
            GNAT_Pragma;
            Check_Arg_Count (0);

            if Operating_Mode = Generate_Code
              or else Ent_Kind = E_Generic_Function
              or else Ent_Kind = E_Generic_Procedure
              or else Ent_Kind = E_Generic_Package
            then
               Get_Name_String (Chars (Cunitent));
               Set_Casing (Mixed_Case);
               Write_Str (Name_Buffer (1 .. Name_Len));
               Write_Str (" is not implemented");
               Write_Eol;
               raise Unrecoverable_Error;
            end if;
         end Unimplemented_Unit;

         --------------------
         -- Universal_Data --
         --------------------

         --  pragma Universal_Data [(library_unit_NAME)];

         when Pragma_Universal_Data =>
            GNAT_Pragma;

            --  If this is a configuration pragma, then set the universal
            --  addressing option, otherwise confirm that the pragma
            --  satisfies the requirements of library unit pragma placement
            --  and leave it to the GNAAMP back end to detect the pragma
            --  (avoids transitive setting of the option due to withed units).

            if Is_Configuration_Pragma then
               Universal_Addressing_On_AAMP := True;
            else
               Check_Valid_Library_Unit_Pragma;
            end if;

            if not AAMP_On_Target then
               Error_Pragma ("?pragma% ignored (applies only to AAMP)");
            end if;

         ------------------
         -- Unreferenced --
         ------------------

         --  pragma Unreferenced (local_Name {, local_Name});

         when Pragma_Unreferenced => Unreferenced : declare
            Arg_Node : Node_Id;
            Arg_Expr : Node_Id;
            Arg_Ent  : Entity_Id;

         begin
            GNAT_Pragma;
            Check_At_Least_N_Arguments (1);

            Arg_Node := Arg1;

            while Present (Arg_Node) loop
               Check_No_Identifier (Arg_Node);

               --  Note that the analyze call done by Check_Arg_Is_Local_Name
               --  will in fact generate a reference, so that the entity will
               --  have a reference, which will inhibit any warnings about it
               --  not being referenced, and also properly show up in the ali
               --  file as a reference. But this reference is recorded before
               --  the Has_Pragma_Unreferenced flag is set, so that no warning
               --  is generated for this reference.

               Check_Arg_Is_Local_Name (Arg_Node);
               Arg_Expr := Get_Pragma_Arg (Arg_Node);

               if Is_Entity_Name (Arg_Expr) then
                  Arg_Ent := Entity (Arg_Expr);

                  --  If the entity is overloaded, the pragma applies to the
                  --  most recent overloading, as documented. In this case,
                  --  name resolution does not generate a reference, so it
                  --  must be done here explicitly.

                  if Is_Overloaded (Arg_Expr) then
                     Generate_Reference (Arg_Ent, N);
                  end if;

                  Set_Has_Pragma_Unreferenced (Arg_Ent);
               end if;

               Next (Arg_Node);
            end loop;
         end Unreferenced;

         ------------------------------
         -- Unreserve_All_Interrupts --
         ------------------------------

         --  pragma Unreserve_All_Interrupts;

         when Pragma_Unreserve_All_Interrupts =>
            GNAT_Pragma;
            Check_Arg_Count (0);

            if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
               Unreserve_All_Interrupts := True;
            end if;

         ----------------
         -- Unsuppress --
         ----------------

         --  pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);

         when Pragma_Unsuppress =>
            GNAT_Pragma;
            Process_Suppress_Unsuppress (False);

         -------------------
         -- Use_VADS_Size --
         -------------------

         --  pragma Use_VADS_Size;

         when Pragma_Use_VADS_Size =>
            GNAT_Pragma;
            Check_Arg_Count (0);
            Check_Valid_Configuration_Pragma;
            Use_VADS_Size := True;

         ---------------------
         -- Validity_Checks --
         ---------------------

         --  pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);

         when Pragma_Validity_Checks => Validity_Checks : declare
            A  : constant Node_Id   := Expression (Arg1);
            S  : String_Id;
            C  : Char_Code;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_No_Identifiers;

            if Nkind (A) = N_String_Literal then
               S   := Strval (A);

               declare
                  Slen    : constant Natural := Natural (String_Length (S));
                  Options : String (1 .. Slen);
                  J       : Natural;

               begin
                  J := 1;
                  loop
                     C := Get_String_Char (S, Int (J));
                     exit when not In_Character_Range (C);
                     Options (J) := Get_Character (C);

                     if J = Slen then
                        Set_Validity_Check_Options (Options);
                        exit;
                     else
                        J := J + 1;
                     end if;
                  end loop;
               end;

            elsif Nkind (A) = N_Identifier then

               if Chars (A) = Name_All_Checks then
                  Set_Validity_Check_Options ("a");

               elsif Chars (A) = Name_On then
                  Validity_Checks_On := True;

               elsif Chars (A) = Name_Off then
                  Validity_Checks_On := False;

               end if;
            end if;
         end Validity_Checks;

         --------------
         -- Volatile --
         --------------

         --  pragma Volatile (LOCAL_NAME);

         when Pragma_Volatile =>
            Process_Atomic_Shared_Volatile;

         -------------------------
         -- Volatile_Components --
         -------------------------

         --  pragma Volatile_Components (array_LOCAL_NAME);

         --  Volatile is handled by the same circuit as Atomic_Components

         --------------
         -- Warnings --
         --------------

         --  pragma Warnings (On | Off, [LOCAL_NAME])

         when Pragma_Warnings => Warnings : begin
            GNAT_Pragma;
            Check_At_Least_N_Arguments (1);
            Check_At_Most_N_Arguments (2);
            Check_No_Identifiers;

            --  One argument case was processed by parser in Par.Prag

            if Arg_Count /= 1 then
               Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
               Check_Arg_Count (2);

               declare
                  E_Id : Node_Id;
                  E    : Entity_Id;

               begin
                  E_Id := Expression (Arg2);
                  Analyze (E_Id);

                  --  In the expansion of an inlined body, a reference to
                  --  the formal may be wrapped in a conversion if the actual
                  --  is a conversion. Retrieve the real entity name.

                  if (In_Instance_Body
                       or else In_Inlined_Body)
                    and then Nkind (E_Id) = N_Unchecked_Type_Conversion
                  then
                     E_Id := Expression (E_Id);
                  end if;

                  if not Is_Entity_Name (E_Id) then
                     Error_Pragma_Arg
                       ("second argument of pragma% must be entity name",
                        Arg2);
                  end if;

                  E := Entity (E_Id);

                  if E = Any_Id then
                     return;
                  else
                     loop
                        Set_Warnings_Off (E,
                          (Chars (Expression (Arg1)) = Name_Off));

                        if Is_Enumeration_Type (E) then
                           declare
                              Lit : Entity_Id := First_Literal (E);

                           begin
                              while Present (Lit) loop
                                 Set_Warnings_Off (Lit);
                                 Next_Literal (Lit);
                              end loop;
                           end;
                        end if;

                        exit when No (Homonym (E));
                        E := Homonym (E);
                     end loop;
                  end if;
               end;
            end if;
         end Warnings;

         -------------------
         -- Weak_External --
         -------------------

         --  pragma Weak_External ([Entity =>] LOCAL_NAME);

         when Pragma_Weak_External => Weak_External : declare
            Ent : Entity_Id;

         begin
            GNAT_Pragma;
            Check_Arg_Count (1);
            Check_Optional_Identifier (Arg1, Name_Entity);
            Check_Arg_Is_Library_Level_Local_Name (Arg1);
            Ent := Entity (Expression (Arg1));

            if Rep_Item_Too_Early (Ent, N) then
               return;
            else
               Ent := Underlying_Type (Ent);
            end if;

            --  The only processing required is to link this item on to the
            --  list of rep items for the given entity. This is accomplished
            --  by the call to Rep_Item_Too_Late (when no error is detected
            --  and False is returned).

            if Rep_Item_Too_Late (Ent, N) then
               return;
            else
               Set_Has_Gigi_Rep_Item (Ent);
            end if;
         end Weak_External;

         --------------------
         -- Unknown_Pragma --
         --------------------

         --  Should be impossible, since the case of an unknown pragma is
         --  separately processed before the case statement is entered.

         when Unknown_Pragma =>
            raise Program_Error;
      end case;

   exception
      when Pragma_Exit => null;
   end Analyze_Pragma;

   ---------------------------------
   -- Delay_Config_Pragma_Analyze --
   ---------------------------------

   function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
   begin
      return Chars (N) = Name_Interrupt_State;
   end Delay_Config_Pragma_Analyze;

   -------------------------
   -- Get_Base_Subprogram --
   -------------------------

   function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
      Result : Entity_Id;

   begin
      Result := Def_Id;

      --  Follow subprogram renaming chain

      while Is_Subprogram (Result)
        and then
          (Is_Generic_Instance (Result)
            or else Nkind (Parent (Declaration_Node (Result))) =
                    N_Subprogram_Renaming_Declaration)
        and then Present (Alias (Result))
      loop
         Result := Alias (Result);
      end loop;

      return Result;
   end Get_Base_Subprogram;

   -----------------------------
   -- Is_Config_Static_String --
   -----------------------------

   function Is_Config_Static_String (Arg : Node_Id) return Boolean is

      function Add_Config_Static_String (Arg : Node_Id) return Boolean;
      --  This is an internal recursive function that is just like the
      --  outer function except that it adds the string to the name buffer
      --  rather than placing the string in the name buffer.

      ------------------------------
      -- Add_Config_Static_String --
      ------------------------------

      function Add_Config_Static_String (Arg : Node_Id) return Boolean is
         N : Node_Id;
         C : Char_Code;

      begin
         N := Arg;

         if Nkind (N) = N_Op_Concat then
            if Add_Config_Static_String (Left_Opnd (N)) then
               N := Right_Opnd (N);
            else
               return False;
            end if;
         end if;

         if Nkind (N) /= N_String_Literal then
            Error_Msg_N ("string literal expected for pragma argument", N);
            return False;

         else
            for J in 1 .. String_Length (Strval (N)) loop
               C := Get_String_Char (Strval (N), J);

               if not In_Character_Range (C) then
                  Error_Msg
                    ("string literal contains invalid wide character",
                     Sloc (N) + 1 + Source_Ptr (J));
                  return False;
               end if;

               Add_Char_To_Name_Buffer (Get_Character (C));
            end loop;
         end if;

         return True;
      end Add_Config_Static_String;

   --  Start of prorcessing for Is_Config_Static_String

   begin

      Name_Len := 0;
      return Add_Config_Static_String (Arg);
   end Is_Config_Static_String;

   -----------------------------------------
   -- Is_Non_Significant_Pragma_Reference --
   -----------------------------------------

   --  This function makes use of the following static table which indicates
   --  whether a given pragma is significant. A value of -1 in this table
   --  indicates that the reference is significant. A value of zero indicates
   --  than appearence as any argument is insignificant, a positive value
   --  indicates that appearence in that parameter position is significant.

   Sig_Flags : constant array (Pragma_Id) of Int :=

     (Pragma_AST_Entry                    => -1,
      Pragma_Abort_Defer                  => -1,
      Pragma_Ada_83                       => -1,
      Pragma_Ada_95                       => -1,
      Pragma_Ada_05                       => -1,
      Pragma_All_Calls_Remote             => -1,
      Pragma_Annotate                     => -1,
      Pragma_Assert                       => -1,
      Pragma_Asynchronous                 => -1,
      Pragma_Atomic                       =>  0,
      Pragma_Atomic_Components            =>  0,
      Pragma_Attach_Handler               => -1,
      Pragma_CPP_Class                    =>  0,
      Pragma_CPP_Constructor              =>  0,
      Pragma_CPP_Virtual                  =>  0,
      Pragma_CPP_Vtable                   =>  0,
      Pragma_C_Pass_By_Copy               =>  0,
      Pragma_Comment                      =>  0,
      Pragma_Common_Object                => -1,
      Pragma_Compile_Time_Warning         => -1,
      Pragma_Complex_Representation       =>  0,
      Pragma_Component_Alignment          => -1,
      Pragma_Controlled                   =>  0,
      Pragma_Convention                   =>  0,
      Pragma_Convention_Identifier        =>  0,
      Pragma_Debug                        => -1,
      Pragma_Detect_Blocking              => -1,
      Pragma_Discard_Names                =>  0,
      Pragma_Elaborate                    => -1,
      Pragma_Elaborate_All                => -1,
      Pragma_Elaborate_Body               => -1,
      Pragma_Elaboration_Checks           => -1,
      Pragma_Eliminate                    => -1,
      Pragma_Explicit_Overriding          => -1,
      Pragma_Export                       => -1,
      Pragma_Export_Exception             => -1,
      Pragma_Export_Function              => -1,
      Pragma_Export_Object                => -1,
      Pragma_Export_Procedure             => -1,
      Pragma_Export_Value                 => -1,
      Pragma_Export_Valued_Procedure      => -1,
      Pragma_Extend_System                => -1,
      Pragma_Extensions_Allowed           => -1,
      Pragma_External                     => -1,
      Pragma_External_Name_Casing         => -1,
      Pragma_Finalize_Storage_Only        =>  0,
      Pragma_Float_Representation         =>  0,
      Pragma_Ident                        => -1,
      Pragma_Import                       => +2,
      Pragma_Import_Exception             =>  0,
      Pragma_Import_Function              =>  0,
      Pragma_Import_Object                =>  0,
      Pragma_Import_Procedure             =>  0,
      Pragma_Import_Valued_Procedure      =>  0,
      Pragma_Initialize_Scalars           => -1,
      Pragma_Inline                       =>  0,
      Pragma_Inline_Always                =>  0,
      Pragma_Inline_Generic               =>  0,
      Pragma_Inspection_Point             => -1,
      Pragma_Interface                    => +2,
      Pragma_Interface_Name               => +2,
      Pragma_Interrupt_Handler            => -1,
      Pragma_Interrupt_Priority           => -1,
      Pragma_Interrupt_State              => -1,
      Pragma_Java_Constructor             => -1,
      Pragma_Java_Interface               => -1,
      Pragma_Keep_Names                   =>  0,
      Pragma_License                      => -1,
      Pragma_Link_With                    => -1,
      Pragma_Linker_Alias                 => -1,
      Pragma_Linker_Options               => -1,
      Pragma_Linker_Section               => -1,
      Pragma_List                         => -1,
      Pragma_Locking_Policy               => -1,
      Pragma_Long_Float                   => -1,
      Pragma_Machine_Attribute            => -1,
      Pragma_Main                         => -1,
      Pragma_Main_Storage                 => -1,
      Pragma_Memory_Size                  => -1,
      Pragma_No_Return                    =>  0,
      Pragma_No_Run_Time                  => -1,
      Pragma_No_Strict_Aliasing           => -1,
      Pragma_Normalize_Scalars            => -1,
      Pragma_Obsolescent                  =>  0,
      Pragma_Optimize                     => -1,
      Pragma_Optional_Overriding          => -1,
      Pragma_Overriding                   => -1,
      Pragma_Pack                         =>  0,
      Pragma_Page                         => -1,
      Pragma_Passive                      => -1,
      Pragma_Polling                      => -1,
      Pragma_Persistent_Data              => -1,
      Pragma_Persistent_Object            => -1,
      Pragma_Preelaborate                 => -1,
      Pragma_Priority                     => -1,
      Pragma_Profile                      =>  0,
      Pragma_Profile_Warnings             =>  0,
      Pragma_Propagate_Exceptions         => -1,
      Pragma_Psect_Object                 => -1,
      Pragma_Pure                         =>  0,
      Pragma_Pure_Function                =>  0,
      Pragma_Queuing_Policy               => -1,
      Pragma_Ravenscar                    => -1,
      Pragma_Remote_Call_Interface        => -1,
      Pragma_Remote_Types                 => -1,
      Pragma_Restricted_Run_Time          => -1,
      Pragma_Restriction_Warnings         => -1,
      Pragma_Restrictions                 => -1,
      Pragma_Reviewable                   => -1,
      Pragma_Share_Generic                => -1,
      Pragma_Shared                       => -1,
      Pragma_Shared_Passive               => -1,
      Pragma_Source_File_Name             => -1,
      Pragma_Source_File_Name_Project     => -1,
      Pragma_Source_Reference             => -1,
      Pragma_Storage_Size                 => -1,
      Pragma_Storage_Unit                 => -1,
      Pragma_Stream_Convert               => -1,
      Pragma_Style_Checks                 => -1,
      Pragma_Subtitle                     => -1,
      Pragma_Suppress                     =>  0,
      Pragma_Suppress_Exception_Locations =>  0,
      Pragma_Suppress_All                 => -1,
      Pragma_Suppress_Debug_Info          =>  0,
      Pragma_Suppress_Initialization      =>  0,
      Pragma_System_Name                  => -1,
      Pragma_Task_Dispatching_Policy      => -1,
      Pragma_Task_Info                    => -1,
      Pragma_Task_Name                    => -1,
      Pragma_Task_Storage                 =>  0,
      Pragma_Thread_Body                  => +2,
      Pragma_Time_Slice                   => -1,
      Pragma_Title                        => -1,
      Pragma_Unchecked_Union              =>  0,
      Pragma_Unimplemented_Unit           => -1,
      Pragma_Universal_Data               => -1,
      Pragma_Unreferenced                 => -1,
      Pragma_Unreserve_All_Interrupts     => -1,
      Pragma_Unsuppress                   =>  0,
      Pragma_Use_VADS_Size                => -1,
      Pragma_Validity_Checks              => -1,
      Pragma_Volatile                     =>  0,
      Pragma_Volatile_Components          =>  0,
      Pragma_Warnings                     => -1,
      Pragma_Weak_External                =>  0,
      Unknown_Pragma                      =>  0);

   function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
      P : Node_Id;
      C : Int;
      A : Node_Id;

   begin
      P := Parent (N);

      if Nkind (P) /= N_Pragma_Argument_Association then
         return False;

      else
         C := Sig_Flags (Get_Pragma_Id (Chars (Parent (P))));

         case C is
            when -1 =>
               return False;

            when 0 =>
               return True;

            when others =>
               A := First (Pragma_Argument_Associations (Parent (P)));
               for J in 1 .. C - 1 loop
                  if No (A) then
                     return False;
                  end if;

                  Next (A);
               end loop;

               return A = P;
         end case;
      end if;
   end Is_Non_Significant_Pragma_Reference;

   ------------------------------
   -- Is_Pragma_String_Literal --
   ------------------------------

   --  This function returns true if the corresponding pragma argument is
   --  a static string expression. These are the only cases in which string
   --  literals can appear as pragma arguments. We also allow a string
   --  literal as the first argument to pragma Assert (although it will
   --  of course always generate a type error).

   function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
      Pragn : constant Node_Id := Parent (Par);
      Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
      Pname : constant Name_Id := Chars (Pragn);
      Argn  : Natural;
      N     : Node_Id;

   begin
      Argn := 1;
      N := First (Assoc);
      loop
         exit when N = Par;
         Argn := Argn + 1;
         Next (N);
      end loop;

      if Pname = Name_Assert then
         return True;

      elsif Pname = Name_Export then
         return Argn > 2;

      elsif Pname = Name_Ident then
         return Argn = 1;

      elsif Pname = Name_Import then
         return Argn > 2;

      elsif Pname = Name_Interface_Name then
         return Argn > 1;

      elsif Pname = Name_Linker_Alias then
         return Argn = 2;

      elsif Pname = Name_Linker_Section then
         return Argn = 2;

      elsif Pname = Name_Machine_Attribute then
         return Argn = 2;

      elsif Pname = Name_Source_File_Name then
         return True;

      elsif Pname = Name_Source_Reference then
         return Argn = 2;

      elsif Pname = Name_Title then
         return True;

      elsif Pname = Name_Subtitle then
         return True;

      else
         return False;
      end if;
   end Is_Pragma_String_Literal;

   --------------------------------------
   -- Process_Compilation_Unit_Pragmas --
   --------------------------------------

   procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
   begin
      --  A special check for pragma Suppress_All. This is a strange DEC
      --  pragma, strange because it comes at the end of the unit. If we
      --  have a pragma Suppress_All in the Pragmas_After of the current
      --  unit, then we insert a pragma Suppress (All_Checks) at the start
      --  of the context clause to ensure the correct processing.

      declare
         PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
         P  : Node_Id;

      begin
         if Present (PA) then
            P := First (PA);
            while Present (P) loop
               if Chars (P) = Name_Suppress_All then
                  Prepend_To (Context_Items (N),
                    Make_Pragma (Sloc (P),
                      Chars => Name_Suppress,
                      Pragma_Argument_Associations => New_List (
                        Make_Pragma_Argument_Association (Sloc (P),
                          Expression =>
                            Make_Identifier (Sloc (P),
                              Chars => Name_All_Checks)))));
                  exit;
               end if;

               Next (P);
            end loop;
         end if;
      end;
   end Process_Compilation_Unit_Pragmas;

   --------------------------------
   -- Set_Encoded_Interface_Name --
   --------------------------------

   procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
      Str : constant String_Id := Strval (S);
      Len : constant Int       := String_Length (Str);
      CC  : Char_Code;
      C   : Character;
      J   : Int;

      Hex : constant array (0 .. 15) of Character := "0123456789abcdef";

      procedure Encode;
      --  Stores encoded value of character code CC. The encoding we
      --  use an underscore followed by four lower case hex digits.

      procedure Encode is
      begin
         Store_String_Char (Get_Char_Code ('_'));
         Store_String_Char
           (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
         Store_String_Char
           (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
         Store_String_Char
           (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
         Store_String_Char
           (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
      end Encode;

   --  Start of processing for Set_Encoded_Interface_Name

   begin
      --  If first character is asterisk, this is a link name, and we
      --  leave it completely unmodified. We also ignore null strings
      --  (the latter case happens only in error cases) and no encoding
      --  should occur for Java interface names.

      if Len = 0
        or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
        or else Java_VM
      then
         Set_Interface_Name (E, S);

      else
         J := 1;
         loop
            CC := Get_String_Char (Str, J);

            exit when not In_Character_Range (CC);

            C := Get_Character (CC);

            exit when C /= '_' and then C /= '$'
              and then C not in '0' .. '9'
              and then C not in 'a' .. 'z'
              and then C not in 'A' .. 'Z';

            if J = Len then
               Set_Interface_Name (E, S);
               return;

            else
               J := J + 1;
            end if;
         end loop;

         --  Here we need to encode. The encoding we use as follows:
         --     three underscores  + four hex digits (lower case)

         Start_String;

         for J in 1 .. String_Length (Str) loop
            CC := Get_String_Char (Str, J);

            if not In_Character_Range (CC) then
               Encode;
            else
               C := Get_Character (CC);

               if C = '_' or else C = '$'
                 or else C in '0' .. '9'
                 or else C in 'a' .. 'z'
                 or else C in 'A' .. 'Z'
               then
                  Store_String_Char (CC);
               else
                  Encode;
               end if;
            end if;
         end loop;

         Set_Interface_Name (E,
           Make_String_Literal (Sloc (S),
             Strval => End_String));
      end if;
   end Set_Encoded_Interface_Name;

   -------------------
   -- Set_Unit_Name --
   -------------------

   procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
      Pref : Node_Id;
      Scop : Entity_Id;

   begin
      if Nkind (N) = N_Identifier
        and then Nkind (With_Item) = N_Identifier
      then
         Set_Entity (N, Entity (With_Item));

      elsif Nkind (N) = N_Selected_Component then
         Change_Selected_Component_To_Expanded_Name (N);
         Set_Entity (N, Entity (With_Item));
         Set_Entity (Selector_Name (N), Entity (N));

         Pref := Prefix (N);
         Scop := Scope (Entity (N));

         while Nkind (Pref) = N_Selected_Component loop
            Change_Selected_Component_To_Expanded_Name (Pref);
            Set_Entity (Selector_Name (Pref), Scop);
            Set_Entity (Pref, Scop);
            Pref := Prefix (Pref);
            Scop := Scope (Scop);
         end loop;

         Set_Entity (Pref, Scop);
      end if;
   end Set_Unit_Name;

end Sem_Prag;