summaryrefslogtreecommitdiff
path: root/lisp/progmodes/antlr-mode.el
blob: 1bdc86260a596ccb12ea64ad000d443e6648c79b (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
;;; antlr-mode.el --- major mode for ANTLR grammar files

;; Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
;;
;; Author: Christoph.Wedler@sap.com
;; Keywords: languages
;; Version: (see `antlr-version' below)
;; X-URL: http://antlr-mode.sourceforge.net/

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT 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
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;; The Emacs package ANTLR-Mode provides: syntax highlighting for ANTLR grammar
;; files, automatic indentation, menus containing rule/token definitions and
;; supported options and various other things like running ANTLR from within
;; Emacs.

;; For details, check <http://antlr-mode.sourceforge.net/> or, if you prefer
;; the manual style, follow all commands mentioned in the documentation of
;; `antlr-mode'.  ANTLR is a LL(k)-based recognition tool which generates
;; lexers, parsers and tree transformers in Java, C++ or Sather and can be
;; found at <http://www.antlr.org/>.

;; Bug fixes, bug reports, improvements, and suggestions for the newest version
;; are strongly appreciated.

;; To-do/Wish-list:
;;
;;  * Next Version [C-c C-w].  Produce HTML document with syntax highlighted
;;    and hyper-links (using htmlize).
;;  * Next Version [C-c C-u].  Insert/update special comments: each rule lists
;;    all rules which use the current rule.  With font-lock update.
;;  * Next Version.  Make hiding much more customizable.
;;  * Planned [C-c C-j].  Jump to generated coding.
;;  * Planned.  Further support for imenu, i.e., include entries for method
;;    definitions at beginning of grammar class.
;;  * Planned [C-c C-p].  Pack/unpack rule/subrule & options (one/multi-line).
;;
;;  * Probably.  Show rules/dependencies for ANT like for Makefile (does ANT
;;    support vocabularies and grammar inheritance?), I have to look at
;;    jde-ant.el: http://jakarta.apache.org/ant/manual/OptionalTasks/antlr.html
;;  * Unlikely.  Sather as generated language with syntax highlighting etc/.
;;    Questions/problems: is sather-mode.el the standard mode for sather, is it
;;    still supported, what is its relationship to eiffel3.el?  Requirement:
;;    this mode must not depend on a Sather mode.
;;  * Unlikely.  Faster syntax highlighting: sectionize the buffer into Antlr
;;    and action code and run special highlighting functions on these regions.
;;    Problems: code size, this mode would depend on font-lock internals.

;;; Installation:

;; This file requires Emacs-20.3, XEmacs-20.4 or higher and package cc-mode.

;; If antlr-mode is not part of your distribution, put this file into your
;; load-path and the following into your ~/.emacs:
;;   (autoload 'antlr-mode "antlr-mode" nil t)
;;   (setq auto-mode-alist (cons '("\\.g\\'" . antlr-mode) auto-mode-alist))
;;   (add-hook 'speedbar-load-hook  ; would be too late in antlr-mode.el
;;	       (lambda () (speedbar-add-supported-extension ".g")))

;; I strongly recommend to use font-lock with a support mode like fast-lock,
;; lazy-lock or better jit-lock (Emacs-21.1+) / lazy-shot (XEmacs).

;; To customize, use menu item "Antlr" -> "Customize Antlr".

;;; Code:

(provide 'antlr-mode)
(require 'easymenu)

;; General Emacs/XEmacs-compatibility compile-time macros
(eval-when-compile
  (require 'cl)
  (defmacro cond-emacs-xemacs (&rest args)
    (cond-emacs-xemacs-macfn
     args "`cond-emacs-xemacs' must return exactly one element"))
  (defun cond-emacs-xemacs-macfn (args &optional msg)
    (if (atom args) args
      (and (eq (car args) :@) (null msg) ; (:@ ...spliced...)
	   (setq args (cdr args)
		 msg "(:@ ....) must return exactly one element"))
      (let ((ignore (if (string-match "XEmacs" emacs-version) :EMACS :XEMACS))
	    (mode :BOTH) code)
	(while (consp args)
	  (if (memq (car args) '(:EMACS :XEMACS :BOTH)) (setq mode (pop args)))
	  (if (atom args)
	      (or args (error "Used selector %s without elements" mode))
	    (or (eq ignore mode)
		(push (cond-emacs-xemacs-macfn (car args)) code))
	    (pop args)))
	(cond (msg (if (or args (cdr code)) (error msg) (car code)))
	      ((or (null args) (eq ignore mode)) (nreverse code))
	      (t (nconc (nreverse code) args))))))
  ;; Emacs/XEmacs-compatibility `defun': remove interactive "_" for Emacs, use
  ;; existing functions when they are `fboundp', provide shortcuts if they are
  ;; known to be defined in a specific Emacs branch (for short .elc)
  (defmacro defunx (name arglist &rest definition)
    (let ((xemacsp (string-match "XEmacs" emacs-version)) reuses)
      (while (memq (car definition)
		   '(:try :emacs-and-try :xemacs-and-try))
	(if (eq (pop definition) (if xemacsp :xemacs-and-try :emacs-and-try))
	    (setq reuses (car definition)
		  definition nil)
	  (push (pop definition) reuses)))
      (if (and reuses (symbolp reuses))
	  `(defalias ',name ',reuses)
	(let* ((docstring (if (stringp (car definition)) (pop definition)))
	       (spec (and (not xemacsp)
			  (eq (car-safe (car definition)) 'interactive)
			  (null (cddar definition))
			  (cadar definition))))
	  (if (and (stringp spec)
		   (not (string-equal spec ""))
		   (eq (aref spec 0) ?_))
	      (setq definition
		    (cons (if (string-equal spec "_")
			      '(interactive)
			    `(interactive ,(substring spec 1)))
			  (cdr definition))))
	  (if (null reuses)
	      `(defun ,name ,arglist ,docstring
		 ,@(cond-emacs-xemacs-macfn definition))
	    ;; no dynamic docstring in this case
	    `(eval-and-compile		; no warnings in Emacs
	       (defalias ',name
		 (cond ,@(mapcar (lambda (func) `((fboundp ',func) ',func))
				 (nreverse reuses))
		       (t ,(if definition
			       `(lambda ,arglist ,docstring
				  ,@(cond-emacs-xemacs-macfn definition))
			     'ignore))))))))))
  (defmacro ignore-errors-x (&rest body)
    (let ((specials '((scan-sexps . 4) (scan-lists . 5)))
	  spec nils)
      (if (and (string-match "XEmacs" emacs-version)
	       (null (cdr body)) (consp (car body))
	       (setq spec (assq (caar body) specials))
	       (>= (setq nils (- (cdr spec) (length (car body)))) 0))
	  `(,@(car body) ,@(make-list nils nil) t)
	`(ignore-errors ,@body)))))

;; More compile-time-macros
(eval-when-compile
  (defmacro save-buffer-state-x (&rest body) ; similar to EMACS/lazy-lock.el
    (let ((modified (gensym "save-buffer-state-x-modified-")))
      `(let ((,modified (buffer-modified-p)))
	 (unwind-protect
	     (let ((buffer-undo-list t) (inhibit-read-only t)
		   ,@(unless (string-match "XEmacs" emacs-version)
		       '((inhibit-point-motion-hooks t) deactivate-mark))
		   before-change-functions after-change-functions
		   buffer-file-name buffer-file-truename)
	       ,@body)
	   (and (not ,modified) (buffer-modified-p)
		(set-buffer-modified-p nil)))))))
(put 'save-buffer-state-x 'lisp-indent-function 0)

;; get rid of byte-compile warnings
(eval-when-compile			; required and optional libraries
  (ignore-errors (require 'cc-mode))
  (ignore-errors (require 'font-lock))
  (ignore-errors (require 'compile))
  (defvar outline-level) (defvar imenu-use-markers)
  (defvar imenu-create-index-function)
  (ignore-errors (defun c-init-language-vars)))


;;;;##########################################################################
;;;;  Variables
;;;;##########################################################################


(defgroup antlr nil
  "Major mode for ANTLR grammar files."
  :group 'languages
  :link '(emacs-commentary-link "antlr-mode.el")
  :link '(url-link "http://antlr-mode.sourceforge.net/")
  :prefix "antlr-")

(defconst antlr-version "2.2b"
  "ANTLR major mode version number.
Check <http://antlr-mode.sourceforge.net/> for the newest.")


;;;===========================================================================
;;;  Controlling ANTLR's code generator (language option)
;;;===========================================================================

(defvar antlr-language nil
  "Major mode corresponding to ANTLR's \"language\" option.
Set via `antlr-language-alist'.  The only useful place to change this
buffer-local variable yourself is in `antlr-mode-hook' or in the \"local
variable list\" near the end of the file, see
`enable-local-variables'.")

(defcustom antlr-language-alist
  '((java-mode "Java" nil "\"Java\"" "Java")
    (c++-mode "C++" "\"Cpp\"" "Cpp"))
  "List of ANTLR's supported languages.
Each element in this list looks like
  \(MAJOR-MODE MODELINE-STRING OPTION-VALUE...)

MAJOR-MODE, the major mode of the code in the grammar's actions, is the
value of `antlr-language' if the first group in the string matched by
REGEXP in `antlr-language-limit-n-regexp' is one of the OPTION-VALUEs.
An OPTION-VALUE of nil denotes the fallback element.  MODELINE-STRING is
also displayed in the modeline next to \"Antlr\"."
  :group 'antlr
  :type '(repeat (group :value (java-mode "")
			(function :tag "Major mode")
			(string :tag "Modeline string")
			(repeat :tag "ANTLR language option" :inline t
				(choice (const :tag "Default" nil)
					string )))))

(defcustom antlr-language-limit-n-regexp
  '(8192 . "language[ \t]*=[ \t]*\\(\"?[A-Z][A-Za-z_]*\"?\\)")
  "Used to set a reasonable value for `antlr-language'.
Looks like \(LIMIT \. REGEXP).  Search for REGEXP from the beginning of
the buffer to LIMIT and use the first group in the matched string to set
the language according to `antlr-language-alist'."
  :group 'antlr
  :type '(cons (choice :tag "Limit" (const :tag "No" nil) (integer :value 0))
	       regexp))


;;;===========================================================================
;;;  Hide/Unhide, Indent/Tabs
;;;===========================================================================

(defcustom antlr-action-visibility 3
  "Visibility of actions when command `antlr-hide-actions' is used.
If nil, the actions with their surrounding braces are hidden.  If a
number, do not hide the braces, only hide the contents if its length is
greater than this number."
  :group 'antlr
  :type '(choice (const :tag "Completely hidden" nil)
		 (integer :tag "Hidden if longer than" :value 3)))

(defcustom antlr-indent-comment 'tab
  "*Non-nil, if the indentation should touch lines in block comments.
If nil, no continuation line of a block comment is changed.  If t, they
are changed according to `c-indentation-line'.  When not nil and not t,
they are only changed by \\[antlr-indent-command]."
  :group 'antlr
  :type '(radio (const :tag "No" nil)
		(const :tag "Always" t)
		(sexp :tag "With TAB" :format "%t" :value tab)))

(defcustom antlr-tab-offset-alist
  '((antlr-mode nil 4 nil)
    (java-mode "antlr" 4 nil))
  "Alist to determine whether to use ANTLR's convention for TABs.
Each element looks like \(MAJOR-MODE REGEXP TAB-WIDTH INDENT-TABS-MODE).
The first element whose MAJOR-MODE is nil or equal to `major-mode' and
whose REGEXP is nil or matches variable `buffer-file-name' is used to
set `tab-width' and `indent-tabs-mode'.  This is useful to support both
ANTLR's and Java's indentation styles.  Used by `antlr-set-tabs'."
  :group 'antlr
  :type '(repeat (group :value (antlr-mode nil 8 nil)
			(choice (const :tag "All" nil)
				(function :tag "Major mode"))
			(choice (const :tag "All" nil) regexp)
			(integer :tag "Tab width")
			(boolean :tag "Indent-tabs-mode"))))

(defcustom antlr-indent-style "java"
  "*If non-nil, cc-mode indentation style used for `antlr-mode'.
See `c-set-style' and for details, where the most interesting part in
`c-style-alist' is the value of `c-basic-offset'."
  :group 'antlr
  :type '(choice (const nil) regexp))

(defcustom antlr-indent-item-regexp
  "[]}):;|&]" ; & is local ANTLR extension (SGML's and-connector)
  "Regexp matching lines which should be indented by one TAB less.
See `antlr-indent-line' and command \\[antlr-indent-command]."
  :group 'antlr
  :type 'regexp)

(defcustom antlr-indent-at-bol-alist
  ;; eval-when-compile not usable with defcustom...
  '((java-mode . "\\(package\\|import\\)\\>")
    (c++-mode . "#\\(assert\\|cpu\\|define\\|endif\\|el\\(if\\|se\\)\\|i\\(dent\\|f\\(def\\|ndef\\)?\\|mport\\|nclude\\(_next\\)?\\)\\|line\\|machine\\|pragma\\|system\\|un\\(assert\\|def\\)\\|warning\\)\\>"))
  "Alist of regexps matching lines are indented at column 0.
Each element in this list looks like (MODE . REGEXP) where MODE is a
function and REGEXP is a regular expression.

If `antlr-language' equals to a MODE, the line starting at the first
non-whitespace is matched by the corresponding REGEXP, and the line is
part of an header action, indent the line at column 0 instead according
to the normal rules of `antlr-indent-line'."
  :group 'antlr
  :type '(repeat (cons (function :tag "Major mode") regexp)))

;; adopt indentation to cc-engine
(defvar antlr-disabling-cc-syntactic-symbols
  '(statement-block-intro
    defun-block-intro topmost-intro statement-case-intro member-init-intro
    arglist-intro brace-list-intro knr-argdecl-intro inher-intro
    objc-method-intro
    block-close defun-close class-close brace-list-close arglist-close
    inline-close extern-lang-close namespace-close))


;;;===========================================================================
;;;  Options: customization
;;;===========================================================================

(defcustom antlr-options-use-submenus t
  "*Non-nil, if the major mode menu should include option submenus.
If nil, the menu just includes a command to insert options.  Otherwise,
it includes four submenus to insert file/grammar/rule/subrule options."
  :group 'antlr
  :type 'boolean)

(defcustom antlr-tool-version 20701
  "*The version number of the Antlr tool.
The value is an integer of the form XYYZZ which stands for vX.YY.ZZ.
This variable is used to warn about non-supported options and to supply
version correct option values when using \\[antlr-insert-option].

Don't use a number smaller than 20600 since the stored history of
Antlr's options starts with v2.06.00, see `antlr-options-alists'.  You
can make this variable buffer-local."
  :group 'antlr
  :type 'integer)

(defcustom antlr-options-auto-colon t
  "*Non-nil, if `:' is inserted with a rule or subrule options section.
A `:' is only inserted if this value is non-nil, if a rule or subrule
option is inserted with \\[antlr-insert-option], if there was no rule or
subrule options section before, and if a `:' is not already present
after the section, ignoring whitespace, comments and the init action."
  :group 'antlr
  :type 'boolean)

(defcustom antlr-options-style nil
  "List of symbols which determine the style of option values.
If a style symbol is present, the corresponding option value is put into
quotes, i.e., represented as a string, otherwise it is represented as an
identifier.

The only style symbol used in the default value of `antlr-options-alist'
is `language-as-string'.  See also `antlr-read-value'."
  :group 'antlr
  :type '(repeat (symbol :tag "Style symbol")))

(defcustom antlr-options-push-mark t
  "*Non-nil, if inserting an option should set & push mark.
If nil, never set mark when inserting an option with command
\\[antlr-insert-option].  If t, always set mark via `push-mark'.  If a
number, only set mark if point was outside the options area before and
the number of lines between point and the insert position is greater
than this value.  Otherwise, only set mark if point was outside the
options area before."
  :group 'antlr
  :type '(radio (const :tag "No" nil)
		(const :tag "Always" t)
		(integer :tag "Lines between" :value 10)
		(sexp :tag "If outside options" :format "%t" :value outside)))

(defcustom antlr-options-assign-string " = "
  "*String containing `=' to use between option name and value.
This string is only used if the option to insert did not exist before
or if there was no `=' after it.  In other words, the spacing around an
existing `=' won't be changed when changing an option value."
  :group 'antlr
  :type 'string)


;;;===========================================================================
;;;  Options: definitions
;;;===========================================================================

(defvar antlr-options-headings '("file" "grammar" "rule" "subrule")
  "Headings for the four different option kinds.
The standard value is (\"file\" \"grammar\" \"rule\" \"subrule\").  See
`antlr-options-alists'")

(defvar antlr-options-alists
  '(;; file options ----------------------------------------------------------
    (("language" antlr-language-option-extra
      (20600 antlr-read-value
	     "Generated language: " language-as-string
	     (("Java") ("Cpp") ("HTML") ("Diagnostic")))
      (20700 antlr-read-value
	     "Generated language: " language-as-string
	     (("Java") ("Cpp") ("HTML") ("Diagnostic") ("Sather"))))
     ("mangleLiteralPrefix" nil
      (20600 antlr-read-value
	     "Prefix for literals (default LITERAL_): " t))
     ("namespace" antlr-c++-mode-extra
      (20700 antlr-read-value
	     "Wrap generated C++ code in namespace: " t))
     ("namespaceStd" antlr-c++-mode-extra
      (20701 antlr-read-value
	     "Replace ANTLR_USE_NAMESPACE(std) by: " t))
     ("namespaceAntlr" antlr-c++-mode-extra
      (20701 antlr-read-value
	     "Replace ANTLR_USE_NAMESPACE(antlr) by: " t))
     ("genHashLines" antlr-c++-mode-extra
      (20701 antlr-read-boolean
	     "Include #line in generated C++ code? "))
     )
    ;; grammar options --------------------------------------------------------
    (("k" nil
      (20600 antlr-read-value
	     "Lookahead depth: "))
     ("importVocab" nil
      (20600 antlr-read-value
	     "Import vocabulary: "))
     ("exportVocab" nil
      (20600 antlr-read-value
	     "Export vocabulary: "))
     ("testLiterals" nil		; lexer only
      (20600 antlr-read-boolean
	     "Test each token against literals table? "))
     ("defaultErrorHandler" nil		; not for lexer
      (20600 antlr-read-boolean
	     "Generate default exception handler for each rule? "))
     ("codeGenMakeSwitchThreshold" nil
      (20600 antlr-read-value
	     "Min number of alternatives for 'switch': "))
     ("codeGenBitsetTestThreshold" nil
      (20600 antlr-read-value
	     "Min size of lookahead set for bitset test: "))
     ("analyzerDebug" nil
      (20600 antlr-read-boolean
	     "Display debugging info during grammar analysis? "))
     ("codeGenDebug" nil
      (20600 antlr-read-boolean
	     "Display debugging info during code generation? "))
     ("buildAST" nil			; not for lexer
      (20600 antlr-read-boolean
	     "Use automatic AST construction/transformation? "))
     ("ASTLabelType" nil		; not for lexer
      (20600 antlr-read-value
	     "Class of user-defined AST node: " t))
     ("charVocabulary" nil		; lexer only
      (20600 nil
	     "Insert character vocabulary"))
     ("interactive" nil
      (20600 antlr-read-boolean
	     "Generate interactive lexer/parser? "))
     ("caseSensitive" nil		; lexer only
      (20600 antlr-read-boolean
	     "Case significant when matching characters? "))
     ("caseSensitiveLiterals" nil	; lexer only
      (20600 antlr-read-boolean
	     "Case significant when testing literals table? "))
     ("classHeaderSuffix" nil
      (20600 nil
	     "Additional string for grammar class definition"))
     ("filter" nil			; lexer only
      (20600 antlr-read-boolean
	     "Skip rule (the name, true or false): "
	     antlr-grammar-tokens))
     ("namespace" antlr-c++-mode-extra
      (20700 antlr-read-value
	     "Wrap generated C++ code for grammar in namespace: " t))
     ("namespaceStd" antlr-c++-mode-extra
      (20701 antlr-read-value
	     "Replace ANTLR_USE_NAMESPACE(std) by: " t))
     ("namespaceAntlr" antlr-c++-mode-extra
      (20701 antlr-read-value
	     "Replace ANTLR_USE_NAMESPACE(antlr) by: " t))
     ("genHashLines" antlr-c++-mode-extra
      (20701 antlr-read-boolean
	     "Include #line in generated C++ code? "))
;;;     ("autoTokenDef" nil		; parser only
;;;      (80000 antlr-read-boolean		; default: true
;;;	     "Automatically define referenced token? "))
;;;     ("keywordsMeltTo" nil		; parser only
;;;      (80000 antlr-read-value
;;;	     "Change non-matching keywords to token type: "))
     )
    ;; rule options ----------------------------------------------------------
    (("testLiterals" nil		; lexer only
      (20600 antlr-read-boolean
	     "Test this token against literals table? "))
     ("defaultErrorHandler" nil		; not for lexer
      (20600 antlr-read-boolean
	     "Generate default exception handler for this rule? "))
     ("ignore" nil			; lexer only
      (20600 antlr-read-value
	     "In this rule, ignore tokens of type: " nil
	     antlr-grammar-tokens))
     ("paraphrase" nil			; lexer only
      (20600 antlr-read-value
	     "In messages, replace name of this token by: " t))
     )
    ;; subrule options -------------------------------------------------------
    (("warnWhenFollowAmbig" nil
      (20600 antlr-read-boolean
	     "Display warnings for ambiguities with FOLLOW? "))
     ("generateAmbigWarnings" nil
      (20600 antlr-read-boolean
	     "Display warnings for ambiguities? "))
     ("greedy" nil
      (20700 antlr-read-boolean
	     "Make this optional/loop subrule greedy? "))
     ))
  "Definitions for Antlr's options of all four different kinds.

The value looks like \(FILE GRAMMAR RULE SUBRULE) where each FILE,
GRAMMAR, RULE, and SUBRULE is a list of option definitions of the
corresponding kind, i.e., looks like \(OPTION-DEF...).

Each OPTION-DEF looks like \(OPTION-NAME EXTRA-FN VALUE-SPEC...) which
defines a file/grammar/rule/subrule option with name OPTION-NAME.  The
OPTION-NAMEs are used for the creation of the \"Insert XXX Option\"
submenus, see `antlr-options-use-submenus', and to allow to insert the
option name with completion when using \\[antlr-insert-option].

If EXTRA-FN is a function, it is called at different phases of the
insertion with arguments \(PHASE OPTION-NAME).  PHASE can have the
values `before-input' or `after-insertion', additional phases might be
defined in future versions of this mode.  The phase `before-input'
occurs before the user is asked to insert a value.  The phase
`after-insertion' occurs after the option value has been inserted.
EXTRA-FN might be called with additional arguments in future versions of
this mode.

Each specification VALUE-SPEC looks like \(VERSION READ-FN ARG...).  The
last VALUE-SPEC in an OPTION-DEF whose VERSION is smaller or equal to
`antlr-tool-version' specifies how the user is asked for the value of
the option.

If READ-FN is nil, the only ARG is a string which is printed at the echo
area to guide the user what to insert at point.  Otherwise, READ-FN is
called with arguments \(INIT-VALUE ARG...) to get the new value of the
option.  INIT-VALUE is the old value of the option or nil.

The standard value contains the following functions as READ-FN:
`antlr-read-value' with ARGs = \(PROMPT AS-STRING TABLE) which reads a
general value, or `antlr-read-boolean' with ARGs = \(PROMPT TABLE) which
reads a boolean value or a member of TABLE.  PROMPT is the prompt when
asking for a new value.  If non-nil, TABLE is a table for completion or
a function evaluating to such a table.  The return value is quoted iff
AS-STRING is non-nil and is either t or a symbol which is a member of
`antlr-options-style'.")


;;;===========================================================================
;;;  Run tool, create Makefile dependencies
;;;===========================================================================

(defcustom antlr-tool-command "java antlr.Tool"
  "*Command used in \\[antlr-run-tool] to run the Antlr tool.
This variable should include all options passed to Antlr except the
option \"-glib\" which is automatically suggested if necessary."
  :group 'antlr
  :type 'string)

(defcustom antlr-ask-about-save t
  "*If not nil, \\[antlr-run-tool] asks which buffers to save.
Otherwise, it saves all modified buffers before running without asking."
  :group 'antlr
  :type 'boolean)

(defcustom antlr-makefile-specification
  '("\n" ("GENS" "GENS%d" " \\\n\t") "$(ANTLR)")
  "*Variable to specify the appearance of the generated makefile rules.
This variable influences the output of \\[antlr-show-makefile-rules].
It looks like \(RULE-SEP GEN-VAR-SPEC COMMAND).

RULE-SEP is the string to separate different makefile rules.  COMMAND is
a string with the command which runs the Antlr tool, it should include
all options except the option \"-glib\" which is automatically added
if necessary.

If GEN-VAR-SPEC is nil, each target directly consists of a list of
files.  If GEN-VAR-SPEC looks like \(GEN-VAR GEN-VAR-FORMAT GEN-SEP), a
Makefile variable is created for each rule target.

Then, GEN-VAR is a string with the name of the variable which contains
the file names of all makefile rules.  GEN-VAR-FORMAT is a format string
producing the variable of each target with substitution COUNT/%d where
COUNT starts with 1.  GEN-SEP is used to separate long variable values."
  :group 'antlr
  :type '(list (string :tag "Rule separator")
	       (choice
		(const :tag "Direct targets" nil)
		(list :tag "Variables for targets"
		      (string :tag "Variable for all targets")
		      (string :tag "Format for each target variable")
		      (string :tag "Variable separator")))
	       (string :tag "ANTLR command")))

(defvar antlr-file-formats-alist
  '((java-mode ("%sTokenTypes.java") ("%s.java"))
    (c++-mode ("%sTokenTypes.hpp") ("%s.cpp" "%s.hpp")))
  "Language dependent formats which specify generated files.
Each element in this list looks looks like
  \(MAJOR-MODE (VOCAB-FILE-FORMAT...) (CLASS-FILE-FORMAT...)).

The element whose MAJOR-MODE is equal to `antlr-language' is used to
specify the generated files which are language dependent.  See variable
`antlr-special-file-formats' for language independent files.

VOCAB-FILE-FORMAT is a format string, it specifies with substitution
VOCAB/%s the generated file for each export vocabulary VOCAB.
CLASS-FILE-FORMAT is a format string, it specifies with substitution
CLASS/%s the generated file for each grammar class CLASS.")

(defvar antlr-special-file-formats '("%sTokenTypes.txt" "expanded%s.g")
  "Language independent formats which specify generated files.
The value looks like \(VOCAB-FILE-FORMAT EXPANDED-GRAMMAR-FORMAT).

VOCAB-FILE-FORMAT is a format string, it specifies with substitution
VOCAB/%s the generated or input file for each export or import
vocabulary VOCAB, respectively.  EXPANDED-GRAMMAR-FORMAT is a format
string, it specifies with substitution GRAMMAR/%s the constructed
grammar file if the file GRAMMAR.g contains a grammar class which
extends a class other than \"Lexer\", \"Parser\" or \"TreeParser\".

See variable `antlr-file-formats-alist' for language dependent
formats.")

(defvar antlr-unknown-file-formats '("?%s?.g" "?%s?")
  "*Formats which specify the names of unknown files.
The value looks like \(SUPER-GRAMMAR-FILE-FORMAT SUPER-EVOCAB-FORMAT).

SUPER-GRAMMAR-FORMAT is a format string, it specifies with substitution
SUPER/%s the name of a grammar file for Antlr's option \"-glib\" if no
grammar file in the current directory defines the class SUPER or if it
is defined more than once.  SUPER-EVOCAB-FORMAT is a format string, it
specifies with substitution SUPER/%s the name for the export vocabulary
of above mentioned class SUPER.")

(defvar antlr-help-unknown-file-text
  "## The following rules contain filenames of the form
##  \"?SUPERCLASS?.g\" (and \"?SUPERCLASS?TokenTypes.txt\")
## where SUPERCLASS is not found to be defined in any grammar file of
## the current directory or is defined more than once.  Please replace
## these filenames by the grammar files (and their exportVocab).\n\n"
  "String indicating the existence of unknown files in the Makefile.
See \\[antlr-show-makefile-rules] and `antlr-unknown-file-formats'.")

(defvar antlr-help-rules-intro
  "The following Makefile rules define the dependencies for all (non-
expanded) grammars in directory \"%s\".\n
They are stored in the kill-ring, i.e., you can insert them with C-y
into your Makefile.  You can also invoke M-x antlr-show-makefile-rules
from within a Makefile to insert them directly.\n\n\n"
  "Introduction to use with \\[antlr-show-makefile-rules].
It is a format string and used with substitution DIRECTORY/%s where
DIRECTORY is the name of the current directory.")


;;;===========================================================================
;;;  Menu
;;;===========================================================================

(defcustom antlr-imenu-name t ; (featurep 'xemacs) ; TODO: Emacs-21 bug?
  "*Non-nil, if a \"Index\" menu should be added to the menubar.
If it is a string, it is used instead \"Index\".  Requires package
imenu."
  :group 'antlr
  :type '(choice (const :tag "No menu" nil)
		 (const :tag "Index menu" t)
		 (string :tag "Other menu name")))

(defvar antlr-mode-map
  (let ((map (make-sparse-keymap)))
    (define-key map "\t" 'antlr-indent-command)
    (define-key map "\e\C-a" 'antlr-beginning-of-rule)
    (define-key map "\e\C-e" 'antlr-end-of-rule)
    (define-key map "\C-c\C-a" 'antlr-beginning-of-body)
    (define-key map "\C-c\C-e" 'antlr-end-of-body)
    (define-key map "\C-c\C-f" 'c-forward-into-nomenclature)
    (define-key map "\C-c\C-b" 'c-backward-into-nomenclature)
    (define-key map "\C-c\C-c" 'comment-region)
    (define-key map "\C-c\C-v" 'antlr-hide-actions)
    (define-key map "\C-c\C-r" 'antlr-run-tool)
    (define-key map "\C-c\C-o" 'antlr-insert-option)
    ;; I'm too lazy to define my own:
    (define-key map "\ea" 'c-beginning-of-statement)
    (define-key map "\ee" 'c-end-of-statement)
    ;; electric keys:
    (define-key map ":" 'antlr-electric-character)
    (define-key map ";" 'antlr-electric-character)
    (define-key map "|" 'antlr-electric-character)
    (define-key map "&" 'antlr-electric-character)
    (define-key map "(" 'antlr-electric-character)
    (define-key map ")" 'antlr-electric-character)
    (define-key map "{" 'antlr-electric-character)
    (define-key map "}" 'antlr-electric-character)
    map)
  "Keymap used in `antlr-mode' buffers.")

(easy-menu-define antlr-mode-menu antlr-mode-map
  "Major mode menu."
  `("Antlr"
    ,@(if (cond-emacs-xemacs
	   :EMACS (and antlr-options-use-submenus
		       (>= emacs-major-version 21))
	   :XEMACS antlr-options-use-submenus)
	  `(("Insert File Option"
	     :filter ,(lambda (x) (antlr-options-menu-filter 1 x)))
	    ("Insert Grammar Option"
	     :filter ,(lambda (x) (antlr-options-menu-filter 2 x)))
	    ("Insert Rule Option"
	     :filter ,(lambda (x) (antlr-options-menu-filter 3 x)))
	    ("Insert Subrule Option"
	     :filter ,(lambda (x) (antlr-options-menu-filter 4 x)))
	    "---")
	'(["Insert Option" antlr-insert-option
	   :active (not buffer-read-only)]))
    ("Forward/Backward"
     ["Backward Rule" antlr-beginning-of-rule t]
     ["Forward Rule" antlr-end-of-rule t]
     ["Start of Rule Body" antlr-beginning-of-body
      :active (antlr-inside-rule-p)]
     ["End of Rule Body" antlr-end-of-body
      :active (antlr-inside-rule-p)]
     "---"
     ["Backward Statement" c-beginning-of-statement t]
     ["Forward Statement" c-end-of-statement t]
     ["Backward Into Nomencl." c-backward-into-nomenclature t]
     ["Forward Into Nomencl." c-forward-into-nomenclature t])
    ["Indent Region" indent-region
     :active (and (not buffer-read-only) (c-region-is-active-p))]
    ["Comment Out Region" comment-region
     :active (and (not buffer-read-only) (c-region-is-active-p))]
    ["Uncomment Region"
     (comment-region (region-beginning) (region-end) '(4))
     :active (and (not buffer-read-only) (c-region-is-active-p))]
    "---"
    ["Hide Actions (incl. Args)" antlr-hide-actions t]
    ["Hide Actions (excl. Args)" (antlr-hide-actions 2) t]
    ["Unhide All Actions" (antlr-hide-actions 0) t]
    "---"
    ["Run Tool on Grammar" antlr-run-tool t]
    ["Show Makefile Rules" antlr-show-makefile-rules t]
    "---"
    ["Customize Antlr" (customize-group 'antlr) t]))


;;;===========================================================================
;;;  font-lock
;;;===========================================================================

(defcustom antlr-font-lock-maximum-decoration 'inherit
  "*The maximum decoration level for fontifying actions.
Value `none' means, do not fontify actions, just normal grammar code
according to `antlr-font-lock-additional-keywords'.  Value `inherit'
means, use value of `font-lock-maximum-decoration'.  Any other value is
interpreted as in `font-lock-maximum-decoration' with no level-0
fontification, see `antlr-font-lock-keywords-alist'.

While calculating the decoration level for actions, `major-mode' is
bound to `antlr-language'.  For example, with value
  \((java-mode \. 2) (c++-mode \. 0))
Java actions are fontified with level 2 and C++ actions are not
fontified at all."
  :type '(choice (const :tag "None" none)
		 (const :tag "Inherit" inherit)
		 (const :tag "Default" nil)
		 (const :tag "Maximum" t)
		 (integer :tag "Level" 1)
		 (repeat :menu-tag "Mode specific" :tag "Mode specific"
			 :value ((t . t))
			 (cons :tag "Instance"
			       (radio :tag "Mode"
				      (const :tag "All" t)
				      (symbol :tag "Name"))
			       (radio :tag "Decoration"
				      (const :tag "Default" nil)
				      (const :tag "Maximum" t)
				      (integer :tag "Level" 1))))))

(defconst antlr-no-action-keywords nil
  ;; Using nil directly won't work (would use highest level, see
  ;; `font-lock-choose-keywords'), but a non-symbol, i.e., (list), at `car'
  ;; would break Emacs-21.0:
  "Empty font-lock keywords for actions.
Do not change the value of this constant.")

(defvar antlr-font-lock-keywords-alist
  '((java-mode
     antlr-no-action-keywords
     java-font-lock-keywords-1 java-font-lock-keywords-2
     java-font-lock-keywords-3)
    (c++-mode
     antlr-no-action-keywords
     c++-font-lock-keywords-1 c++-font-lock-keywords-2
     c++-font-lock-keywords-3))
  "List of font-lock keywords for actions in the grammar.
Each element in this list looks like
  \(MAJOR-MODE KEYWORD...)

If `antlr-language' is equal to MAJOR-MODE, the KEYWORDs are the
font-lock keywords according to `font-lock-defaults' used for the code
in the grammar's actions and semantic predicates, see
`antlr-font-lock-maximum-decoration'.")

(defvar antlr-font-lock-default-face 'antlr-font-lock-default-face)
(defface antlr-font-lock-default-face nil
  "Face to prevent strings from language dependent highlighting.
Do not change."
  :group 'antlr)

(defvar antlr-font-lock-keyword-face 'antlr-font-lock-keyword-face)
(defface antlr-font-lock-keyword-face
  (cond-emacs-xemacs
   '((((class color) (background light))
      (:foreground "black" :EMACS :weight bold :XEMACS :bold t))))
  "ANTLR keywords."
  :group 'antlr)

(defvar antlr-font-lock-syntax-face 'antlr-font-lock-keyword-face)
(defface antlr-font-lock-syntax-face
  (cond-emacs-xemacs
   '((((class color) (background light))
      (:foreground "black" :EMACS :weight bold :XEMACS :bold t))))
  "ANTLR syntax symbols like :, |, (, ), ...."
  :group 'antlr)

(defvar antlr-font-lock-ruledef-face 'antlr-font-lock-ruledef-face)
(defface antlr-font-lock-ruledef-face
  (cond-emacs-xemacs
   '((((class color) (background light))
      (:foreground "blue" :EMACS :weight bold :XEMACS :bold t))))
  "ANTLR rule references (definition)."
  :group 'antlr)

(defvar antlr-font-lock-tokendef-face 'antlr-font-lock-tokendef-face)
(defface antlr-font-lock-tokendef-face
  (cond-emacs-xemacs
   '((((class color) (background light))
      (:foreground "blue" :EMACS :weight bold :XEMACS :bold t))))
  "ANTLR token references (definition)."
  :group 'antlr)

(defvar antlr-font-lock-ruleref-face 'antlr-font-lock-ruleref-face)
(defface antlr-font-lock-ruleref-face
  '((((class color) (background light)) (:foreground "blue4")))
  "ANTLR rule references (usage)."
  :group 'antlr)

(defvar antlr-font-lock-tokenref-face 'antlr-font-lock-tokenref-face)
(defface antlr-font-lock-tokenref-face
  '((((class color) (background light)) (:foreground "orange4")))
  "ANTLR token references (usage)."
  :group 'antlr)

(defvar antlr-font-lock-literal-face 'antlr-font-lock-literal-face)
(defface antlr-font-lock-literal-face
  (cond-emacs-xemacs
   '((((class color) (background light))
      (:foreground "brown4" :EMACS :weight bold :XEMACS :bold t))))
  "ANTLR special literal tokens.
It is used to highlight strings matched by the first regexp group of
`antlr-font-lock-literal-regexp'."
  :group 'antlr)

(defcustom antlr-font-lock-literal-regexp "\"\\(\\sw\\(\\sw\\|-\\)*\\)\""
  "Regexp matching literals with special syntax highlighting, or nil.
If nil, there is no special syntax highlighting for some literals.
Otherwise, it should be a regular expression which must contain a regexp
group.  The string matched by the first group is highlighted with
`antlr-font-lock-literal-face'."
  :group 'antlr
  :type '(choice (const :tag "None" nil) regexp))

(defvar antlr-class-header-regexp
  "\\(class\\)[ \t]+\\([A-Za-z\300-\326\330-\337]\\sw*\\)[ \t]+\\(extends\\)[ \t]+\\([A-Za-z\300-\326\330-\337]\\sw*\\)[ \t]*;"
  "Regexp matching class headers.")

(defvar antlr-font-lock-additional-keywords
  (cond-emacs-xemacs
   `((antlr-invalidate-context-cache)
     ("\\$setType[ \t]*(\\([A-Za-z\300-\326\330-\337]\\sw*\\))"
      (1 antlr-font-lock-tokendef-face))
     ("\\$\\sw+" (0 font-lock-keyword-face))
     ;; the tokens are already fontified as string/docstrings:
     (,(lambda (limit)
	 (if antlr-font-lock-literal-regexp
	     (antlr-re-search-forward antlr-font-lock-literal-regexp limit)))
      (1 antlr-font-lock-literal-face t)
      :XEMACS (0 nil))			; XEmacs bug workaround
     (,(lambda (limit)
	 (antlr-re-search-forward antlr-class-header-regexp limit))
      (1 antlr-font-lock-keyword-face)
      (2 antlr-font-lock-ruledef-face)
      (3 antlr-font-lock-keyword-face)
      (4 (if (member (match-string 4) '("Lexer" "Parser" "TreeParser"))
	     'antlr-font-lock-keyword-face
	   'font-lock-type-face)))
     (,(lambda (limit)
	 (antlr-re-search-forward
	  "\\<\\(header\\|options\\|tokens\\|exception\\|catch\\|returns\\)\\>"
	  limit))
     (1 antlr-font-lock-keyword-face))
     (,(lambda (limit)
	 (antlr-re-search-forward
	  "^\\(private\\|public\\|protected\\)\\>[ \t]*\\(\\(\\sw+[ \t]*\\(:\\)?\\)\\)?"
	  limit))
     (1 font-lock-type-face)		; not XEmacs' java level-3 fruit salad
     (3 (if (antlr-upcase-p (char-after (match-beginning 3)))
	    'antlr-font-lock-tokendef-face
	  'antlr-font-lock-ruledef-face) nil t)
     (4 antlr-font-lock-syntax-face nil t))
     (,(lambda (limit)
	 (antlr-re-search-forward "^\\(\\sw+\\)[ \t]*\\(:\\)?" limit))
     (1 (if (antlr-upcase-p (char-after (match-beginning 0)))
	    'antlr-font-lock-tokendef-face
	  'antlr-font-lock-ruledef-face) nil t)
     (2 antlr-font-lock-syntax-face nil t))
     (,(lambda (limit)
	 ;; v:ruleref and v:"literal" is allowed...
	 (antlr-re-search-forward "\\(\\sw+\\)[ \t]*\\([=:]\\)?" limit))
     (1 (if (match-beginning 2)
	    (if (eq (char-after (match-beginning 2)) ?=)
		'antlr-font-lock-default-face
	      'font-lock-variable-name-face)
	  (if (antlr-upcase-p (char-after (match-beginning 1)))
	      'antlr-font-lock-tokenref-face
	    'antlr-font-lock-ruleref-face)))
     (2 antlr-font-lock-default-face nil t))
     (,(lambda (limit)
	 (antlr-re-search-forward "[|&:;(~]\\|)\\([*+?]\\|=>\\)?" limit))
     (0 'antlr-font-lock-syntax-face))))
  "Font-lock keywords for ANTLR's normal grammar code.
See `antlr-font-lock-keywords-alist' for the keywords of actions.")

(defvar antlr-font-lock-defaults
  '(antlr-font-lock-keywords
    nil nil ((?_ . "w") (?\( . ".") (?\) . ".")) beginning-of-defun)
  "Font-lock defaults used for ANTLR syntax highlighting.
The SYNTAX-ALIST element is also used to initialize
`antlr-action-syntax-table'.")


;;;===========================================================================
;;;  Internal variables
;;;===========================================================================

(defvar antlr-mode-hook nil
  "Hook called by `antlr-mode'.")

(defvar antlr-mode-syntax-table nil
  "Syntax table used in `antlr-mode' buffers.
If non-nil, it will be initialized in `antlr-mode'.")

;; used for "in Java/C++ code" = syntactic-depth>0
(defvar antlr-action-syntax-table nil
  "Syntax table used for ANTLR action parsing.
Initialized by `antlr-mode-syntax-table', changed by SYNTAX-ALIST in
`antlr-font-lock-defaults'.  This table should be selected if you use
`buffer-syntactic-context' and `buffer-syntactic-context-depth' in order
not to confuse their context_cache.")

(defvar antlr-mode-abbrev-table nil
  "Abbreviation table used in `antlr-mode' buffers.")
(define-abbrev-table 'antlr-mode-abbrev-table ())

(defvar antlr-slow-cache-enabling-symbol 'loudly
;; Emacs' font-lock changes buffer's tick counter, therefore this value should
;; be a parameter of a font-lock function, but not any other variable of
;; functions which call `antlr-slow-syntactic-context'.
  "If value is a bound symbol, cache will be used even with text changes.
This is no user option.  Used for `antlr-slow-syntactic-context'.")

(defvar antlr-slow-cache-diff-threshold 5000
  "Maximum distance between `point' and cache position for cache use.
Used for `antlr-slow-syntactic-context'.")


;;;;##########################################################################
;;;;  The Code
;;;;##########################################################################



;;;===========================================================================
;;;  Syntax functions -- Emacs vs XEmacs dependent, part 1
;;;===========================================================================

;; From help.el (XEmacs-21.1), without `copy-syntax-table'
(defmacro antlr-with-syntax-table (syntab &rest body)
  "Evaluate BODY with the syntax table SYNTAB."
  `(let ((stab (syntax-table)))
     (unwind-protect
	 (progn (set-syntax-table ,syntab) ,@body)
       (set-syntax-table stab))))
(put 'antlr-with-syntax-table 'lisp-indent-function 1)
(put 'antlr-with-syntax-table 'edebug-form-spec '(form body))

(defunx antlr-default-directory ()
  :xemacs-and-try default-directory
  "Return `default-directory'."
  default-directory)

;; Check Emacs-21.1 simple.el, `shell-command'.
(defunx antlr-read-shell-command (prompt &optional initial-input history)
  :xemacs-and-try read-shell-command
  "Read a string from the minibuffer, using `shell-command-history'."
  (read-from-minibuffer prompt initial-input nil nil
			(or history 'shell-command-history)))

(defunx antlr-with-displaying-help-buffer (thunk &optional name)
  :xemacs-and-try with-displaying-help-buffer
  "Make a help buffer and call `thunk' there."
  (with-output-to-temp-buffer "*Help*"
    (save-excursion (funcall thunk))))


;;;===========================================================================
;;;  Context cache
;;;===========================================================================

(defvar antlr-slow-context-cache nil "Internal.")

;;;(defvar antlr-statistics-full-neg 0)
;;;(defvar antlr-statistics-full-diff 0)
;;;(defvar antlr-statistics-full-other 0)
;;;(defvar antlr-statistics-cache 0)
;;;(defvar antlr-statistics-inval 0)

(defunx antlr-invalidate-context-cache (&rest dummies)
;; checkdoc-params: (dummies)
  "Invalidate context cache for syntactical context information."
  :XEMACS				; XEmacs bug workaround
  (save-excursion
    (set-buffer (get-buffer-create " ANTLR XEmacs bug workaround"))
    (buffer-syntactic-context-depth)
    nil)
  :EMACS
;;;  (incf antlr-statistics-inval)
  (setq antlr-slow-context-cache nil))

(defunx antlr-syntactic-context ()
  "Return some syntactic context information.
Return `string' if point is within a string, `block-comment' or
`comment' is point is within a comment or the depth within all
parenthesis-syntax delimiters at point otherwise.
WARNING: this may alter `match-data'."
  :XEMACS
  (or (buffer-syntactic-context) (buffer-syntactic-context-depth))
  :EMACS
  (let ((orig (point)) diff state
	;; Arg, Emacs' (buffer-modified-tick) changes with font-lock.  Use
	;; hack that `loudly' is bound during font-locking => cache use will
	;; increase from 7% to 99.99% during font-locking.
	(tick (or (boundp antlr-slow-cache-enabling-symbol)
		  (buffer-modified-tick))))
    (if (and (cdr antlr-slow-context-cache)
	     (>= (setq diff (- orig (cadr antlr-slow-context-cache))) 0)
	     (< diff antlr-slow-cache-diff-threshold)
	     (eq (current-buffer) (caar antlr-slow-context-cache))
	     (eq tick (cdar antlr-slow-context-cache)))
	;; (setq antlr-statistics-cache (1+ antlr-statistics-cache) ...)
	(setq state (parse-partial-sexp (cadr antlr-slow-context-cache) orig
					nil nil
					(cddr antlr-slow-context-cache)))
      (if (>= orig antlr-slow-cache-diff-threshold)
	  (beginning-of-defun)
	(goto-char (point-min)))
;;;      (cond ((and diff (< diff 0)) (incf antlr-statistics-full-neg))
;;;	    ((and diff (>= diff 3000)) (incf antlr-statistics-full-diff))
;;;	    (t (incf antlr-statistics-full-other)))
      (setq state (parse-partial-sexp (point) orig)))
    (goto-char orig)
    (if antlr-slow-context-cache
	(setcdr antlr-slow-context-cache (cons orig state))
      (setq antlr-slow-context-cache
	    (cons (cons (current-buffer) tick)
		  (cons orig state))))
    (cond ((nth 3 state) 'string)
	  ((nth 4 state) 'comment)	; block-comment? -- we don't care
	  (t (car state)))))

;;;  (incf (aref antlr-statistics 2))
;;;  (unless (and (eq (current-buffer)
;;;		   (caar antlr-slow-context-cache))
;;;	       (eq (buffer-modified-tick)
;;;		   (cdar antlr-slow-context-cache)))
;;;    (incf (aref antlr-statistics 1))
;;;    (setq antlr-slow-context-cache nil))
;;;  (let* ((orig (point))
;;;	 (base (cadr antlr-slow-context-cache))
;;;	 (curr (cddr antlr-slow-context-cache))
;;;	 (state (cond ((eq orig (car curr)) (cdr curr))
;;;		      ((eq orig (car base)) (cdr base))))
;;;	 diff diff2)
;;;    (unless state
;;;      (incf (aref antlr-statistics 3))
;;;      (when curr
;;;	(if (< (setq diff  (abs (- orig (car curr))))
;;;	       (setq diff2 (abs (- orig (car base)))))
;;;	    (setq state curr)
;;;	  (setq state base
;;;		diff  diff2))
;;;	(if (or (>= (1+ diff) (point)) (>= diff 3000))
;;;	    (setq state nil)))		; start from bod/bob
;;;      (if state
;;;	  (setq state
;;;		(parse-partial-sexp (car state) orig nil nil (cdr state)))
;;;	(if (>= orig 3000) (beginning-of-defun) (goto-char (point-min)))
;;;	(incf (aref antlr-statistics 4))
;;;	(setq cw (list orig (point) base curr))
;;;	(setq state (parse-partial-sexp (point) orig)))
;;;      (goto-char orig)
;;;      (if antlr-slow-context-cache
;;;	  (setcdr (cdr antlr-slow-context-cache) (cons orig state))
;;;	(setq antlr-slow-context-cache
;;;	      (cons (cons (current-buffer) (buffer-modified-tick))
;;;		    (cons (cons orig state) (cons orig state))))))
;;;    (cond ((nth 3 state) 'string)
;;;	  ((nth 4 state) 'comment)	; block-comment? -- we don't care
;;;	  (t (car state)))))

;;;    (beginning-of-defun)
;;;    (let ((state (parse-partial-sexp (point) orig)))
;;;      (goto-char orig)
;;;      (cond ((nth 3 state) 'string)
;;;	    ((nth 4 state) 'comment)	; block-comment? -- we don't care
;;;	    (t (car state))))))


;;;===========================================================================
;;;  Miscellaneous functions
;;;===========================================================================

(defun antlr-upcase-p (char)
  "Non-nil, if CHAR is an uppercase character (if CHAR was a char)."
  ;; in XEmacs, upcase only works for ASCII
  (or (and (<= ?A char) (<= char ?Z))
      (and (<= ?\300 char) (<= char ?\337)))) ; ?\327 is no letter

(defun antlr-re-search-forward (regexp bound)
  "Search forward from point for regular expression REGEXP.
Set point to the end of the occurrence found, and return point.  Return
nil if no occurrence was found.  Do not search within comments, strings
and actions/semantic predicates.  BOUND bounds the search; it is a
buffer position.  See also the functions `match-beginning', `match-end'
and `replace-match'."
  ;; WARNING: Should only be used with `antlr-action-syntax-table'!
  (let ((continue t))
    (while (and (re-search-forward regexp bound 'limit)
		(save-match-data
		  (if (eq (antlr-syntactic-context) 0)
		      (setq continue nil)
		    t))))
    (if continue nil (point))))

(defun antlr-search-forward (string)
  "Search forward from point for STRING.
Set point to the end of the occurrence found, and return point.  Return
nil if no occurrence was found.  Do not search within comments, strings
and actions/semantic predicates."
  ;; WARNING: Should only be used with `antlr-action-syntax-table'!
  (let ((continue t))
    (while (and (search-forward string nil 'limit)
		(if (eq (antlr-syntactic-context) 0) (setq continue nil) t)))
    (if continue nil (point))))

(defun antlr-search-backward (string)
  "Search backward from point for STRING.
Set point to the beginning of the occurrence found, and return point.
Return nil if no occurrence was found.  Do not search within comments,
strings and actions/semantic predicates."
  ;; WARNING: Should only be used with `antlr-action-syntax-table'!
  (let ((continue t))
    (while (and (search-backward string nil 'limit)
		(if (eq (antlr-syntactic-context) 0) (setq continue nil) t)))
    (if continue nil (point))))

(defsubst antlr-skip-sexps (count)
  "Skip the next COUNT balanced expressions and the comments after it.
Return position before the comments after the last expression."
  (goto-char (or (ignore-errors-x (scan-sexps (point) count)) (point-max)))
  (prog1 (point)
    (c-forward-syntactic-ws)))


;;;===========================================================================
;;;  font-lock
;;;===========================================================================

(defun antlr-font-lock-keywords ()
  "Return font-lock keywords for current buffer.
See `antlr-font-lock-additional-keywords', `antlr-language' and
`antlr-font-lock-maximum-decoration'."
  (if (eq antlr-font-lock-maximum-decoration 'none)
      antlr-font-lock-additional-keywords
    (append antlr-font-lock-additional-keywords
	    (eval (let ((major-mode antlr-language)) ; dynamic
			(font-lock-choose-keywords
			 (cdr (assq antlr-language
				    antlr-font-lock-keywords-alist))
			 (if (eq antlr-font-lock-maximum-decoration 'inherit)
			     font-lock-maximum-decoration
			   antlr-font-lock-maximum-decoration)))))))


;;;===========================================================================
;;;  imenu support
;;;===========================================================================

(defun antlr-grammar-tokens ()
  "Return alist for tokens defined in current buffer."
  (save-excursion (antlr-imenu-create-index-function t)))

(defun antlr-imenu-create-index-function (&optional tokenrefs-only)
  "Return imenu index-alist for ANTLR grammar files.
IF TOKENREFS-ONLY is non-nil, just return alist with tokenref names."
  (let ((items nil)
	(classes nil)
	(continue t))
    ;; Using `imenu-progress-message' would require imenu for compilation, but
    ;; nobody is missing these messages.  The generic imenu function searches
    ;; backward, which is slower and more likely not to work during editing.
    (antlr-with-syntax-table antlr-action-syntax-table
      (antlr-invalidate-context-cache)
      (goto-char (point-min))
      (antlr-skip-file-prelude t)
      (while continue
	(if (looking-at "{") (antlr-skip-sexps 1))
	(if (looking-at antlr-class-header-regexp)
	    (or tokenrefs-only
		(push (cons (match-string 2)
			    (if imenu-use-markers
				(copy-marker (match-beginning 2))
			      (match-beginning 2)))
		      classes))
	  (if (looking-at "p\\(ublic\\|rotected\\|rivate\\)")
	      (antlr-skip-sexps 1))
	  (when (looking-at "\\sw+")
	    (if tokenrefs-only
		(if (antlr-upcase-p (char-after (point)))
		    (push (list (match-string 0)) items))
	      (push (cons (match-string 0)
			  (if imenu-use-markers
			      (copy-marker (match-beginning 0))
			    (match-beginning 0)))
		    items))))
	(if (setq continue (antlr-search-forward ";"))
	    (antlr-skip-exception-part t))))
    (if classes
	(cons (cons "Classes" (nreverse classes)) (nreverse items))
      (nreverse items))))


;;;===========================================================================
;;;  Parse grammar files (internal functions)
;;;===========================================================================

(defun antlr-skip-exception-part (skip-comment)
  "Skip exception part of current rule, i.e., everything after `;'.
This also includes the options and tokens part of a grammar class
header.  If SKIP-COMMENT is non-nil, also skip the comment after that
part."
  (let ((pos (point))
	(class nil))
    (c-forward-syntactic-ws)
    (while (looking-at "options\\>\\|tokens\\>")
      (setq class t)
      (setq pos (antlr-skip-sexps 2)))
    (if class
	;; Problem: an action only belongs to a class def, not a normal rule.
	;; But checking the current rule type is too expensive => only expect
	;; an action if we have found an option or tokens part.
	(if (looking-at "{") (setq pos (antlr-skip-sexps 1)))
      (while (looking-at "exception\\>")
	(setq pos (antlr-skip-sexps 1))
	(when (looking-at "\\[")
	  (setq pos (antlr-skip-sexps 1)))
	(while (looking-at "catch\\>")
	  (setq pos (antlr-skip-sexps 3)))))
    (or skip-comment (goto-char pos))))

(defun antlr-skip-file-prelude (skip-comment)
  "Skip the file prelude: the header and file options.
If SKIP-COMMENT is non-nil, also skip the comment after that part.
Return the start position of the file prelude.

Hack: if SKIP-COMMENT is `header-only' only skip header and return
position before the comment after the header."
  (let* ((pos (point))
	 (pos0 pos))
    (c-forward-syntactic-ws)
    (if skip-comment (setq pos0 (point)))
    (while (looking-at "header\\>[ \t]*\\(\"\\)?")
      (setq pos (antlr-skip-sexps (if (match-beginning 1) 3 2))))
    (if (eq skip-comment 'header-only)	; a hack...
	pos
      (when (looking-at "options\\>")
	(setq pos (antlr-skip-sexps 2)))
      (or skip-comment (goto-char pos))
      pos0)))

(defun antlr-next-rule (arg skip-comment)
  "Move forward to next end of rule.  Do it ARG many times.
A grammar class header and the file prelude are also considered as a
rule.  Negative argument ARG means move back to ARGth preceding end of
rule.  The behavior is not defined when ARG is zero.  If SKIP-COMMENT
is non-nil, move to beginning of the rule."
  ;; WARNING: Should only be used with `antlr-action-syntax-table'!
  ;; PRE: ARG<>0
  (let ((pos (point))
	(beg (point)))
    ;; first look whether point is in exception part
    (if (antlr-search-backward ";")
	(progn
	  (setq beg (point))
	  (forward-char)
	  (antlr-skip-exception-part skip-comment))
      (antlr-skip-file-prelude skip-comment))
    (if (< arg 0)
	(unless (and (< (point) pos) (zerop (incf arg)))
	  ;; if we have moved backward, we already moved one defun backward
	  (goto-char beg)		; rewind (to ";" / point)
	  (while (and arg (<= (incf arg) 0))
	    (if (antlr-search-backward ";")
		(setq beg (point))
	      (when (>= arg -1)
		;; try file prelude:
		(setq pos (antlr-skip-file-prelude skip-comment))
		(if (zerop arg)
		    (if (>= (point) beg)
			(goto-char (if (>= pos beg) (point-min) pos)))
		  (goto-char (if (or (>= (point) beg) (= (point) pos))
				 (point-min) pos))))
	      (setq arg nil)))
	  (when arg			; always found a ";"
	    (forward-char)
	    (antlr-skip-exception-part skip-comment)))
      (if (<= (point) pos)		; moved backward?
	  (goto-char pos)		; rewind
	(decf arg))			; already moved one defun forward
      (unless (zerop arg)
	(while (>= (decf arg) 0)
	  (antlr-search-forward ";"))
	(antlr-skip-exception-part skip-comment)))))

(defun antlr-outside-rule-p ()
  "Non-nil if point is outside a grammar rule.
Move to the beginning of the current rule if point is inside a rule."
  ;; WARNING: Should only be used with `antlr-action-syntax-table'!
  (let ((pos (point)))
    (antlr-next-rule -1 nil)
    (let ((between (or (bobp) (< (point) pos))))
      (c-forward-syntactic-ws)
      (and between (> (point) pos) (goto-char pos)))))


;;;===========================================================================
;;;  Parse grammar files (commands)
;;;===========================================================================
;; No (interactive "_") in Emacs... use `zmacs-region-stays'.

(defun antlr-inside-rule-p ()
  "Non-nil if point is inside a grammar rule.
A grammar class header and the file prelude are also considered as a
rule."
  (save-excursion
    (antlr-with-syntax-table antlr-action-syntax-table
      (not (antlr-outside-rule-p)))))

(defunx antlr-end-of-rule (&optional arg)
  "Move forward to next end of rule.  Do it ARG [default: 1] many times.
A grammar class header and the file prelude are also considered as a
rule.  Negative argument ARG means move back to ARGth preceding end of
rule.  If ARG is zero, run `antlr-end-of-body'."
  (interactive "_p")
  (if (zerop arg)
      (antlr-end-of-body)
    (antlr-with-syntax-table antlr-action-syntax-table
      (antlr-next-rule arg nil))))

(defunx antlr-beginning-of-rule (&optional arg)
  "Move backward to preceding beginning of rule.  Do it ARG many times.
A grammar class header and the file prelude are also considered as a
rule.  Negative argument ARG means move forward to ARGth next beginning
of rule.  If ARG is zero, run `antlr-beginning-of-body'."
  (interactive "_p")
  (if (zerop arg)
      (antlr-beginning-of-body)
    (antlr-with-syntax-table antlr-action-syntax-table
      (antlr-next-rule (- arg) t))))

(defunx antlr-end-of-body (&optional msg)
  "Move to position after the `;' of the current rule.
A grammar class header is also considered as a rule.  With optional
prefix arg MSG, move to `:'."
  (interactive "_")
  (antlr-with-syntax-table antlr-action-syntax-table
    (let ((orig (point)))
      (if (antlr-outside-rule-p)
	  (error "Outside an ANTLR rule"))
      (let ((bor (point)))
	(when (< (antlr-skip-file-prelude t) (point))
	  ;; Yes, we are in the file prelude
	  (goto-char orig)
	  (error (or msg "The file prelude is without `;'")))
	(antlr-search-forward ";")
	(when msg
	  (when (< (point)
		   (progn (goto-char bor)
			  (or (antlr-search-forward ":") (point-max))))
	    (goto-char orig)
	    (error msg))
	  (c-forward-syntactic-ws))))))

(defunx antlr-beginning-of-body ()
  "Move to the first element after the `:' of the current rule."
  (interactive "_")
  (antlr-end-of-body "Class headers and the file prelude are without `:'"))


;;;===========================================================================
;;;  Literal normalization, Hide Actions
;;;===========================================================================

(defun antlr-downcase-literals (&optional transform)
  "Convert all literals in buffer to lower case.
If non-nil, TRANSFORM is used on literals instead of `downcase-region'."
  (interactive)
  (or transform (setq transform 'downcase-region))
  (let ((literals 0))
    (save-excursion
      (goto-char (point-min))
      (antlr-with-syntax-table antlr-action-syntax-table
	(antlr-invalidate-context-cache)
	(while (antlr-re-search-forward "\"\\(\\sw\\(\\sw\\|-\\)*\\)\"" nil)
	  (funcall transform (match-beginning 0) (match-end 0))
	  (incf literals))))
    (message "Transformed %d literals" literals)))

(defun antlr-upcase-literals ()
  "Convert all literals in buffer to upper case."
  (interactive)
  (antlr-downcase-literals 'upcase-region))

(defun antlr-hide-actions (arg &optional silent)
  "Hide or unhide all actions in buffer.
Hide all actions including arguments in brackets if ARG is 1 or if
called interactively without prefix argument.  Hide all actions
excluding arguments in brackets if ARG is 2 or higher.  Unhide all
actions if ARG is 0 or negative.  See `antlr-action-visibility'.

Display a message unless optional argument SILENT is non-nil."
  (interactive "p")
  (save-buffer-state-x
    (if (> arg 0)
	(let ((regexp (if (= arg 1) "[]}]" "}"))
	      (diff (and antlr-action-visibility
			 (+ (max antlr-action-visibility 0) 2))))
	  (antlr-hide-actions 0 t)
	  (save-excursion
	    (goto-char (point-min))
	    (antlr-with-syntax-table antlr-action-syntax-table
	      (antlr-invalidate-context-cache)
	      (while (antlr-re-search-forward regexp nil)
		(let ((beg (ignore-errors-x (scan-sexps (point) -1))))
		  (when beg
		    (if diff		; braces are visible
			(if (> (point) (+ beg diff))
			    (add-text-properties (1+ beg) (1- (point))
						 '(invisible t intangible t)))
		      ;; if actions is on line(s) of its own, hide WS
		      (and (looking-at "[ \t]*$")
			   (save-excursion
			     (goto-char beg)
			     (skip-chars-backward " \t")
			     (and (bolp) (setq beg (point))))
			   (beginning-of-line 2)) ; beginning of next line
		      (add-text-properties beg (point)
					   '(invisible t intangible t))))))))
	  (or silent
	      (message "Hide all actions (%s arguments)...done"
		       (if (= arg 1) "including" "excluding"))))
      (remove-text-properties (point-min) (point-max)
			      '(invisible nil intangible nil))
      (or silent
	  (message "Unhide all actions (including arguments)...done")))))


;;;===========================================================================
;;;  Insert option: command
;;;===========================================================================

(defun antlr-insert-option (level option &optional location)
  "Insert file/grammar/rule/subrule option near point.
LEVEL determines option kind to insert: 1=file, 2=grammar, 3=rule,
4=subrule.  OPTION is a string with the name of the option to insert.
LOCATION can be specified for not calling `antlr-option-kind' twice.

Inserting an option with this command works as follows:

 1. When called interactively, LEVEL is determined by the prefix
    argument or automatically deduced without prefix argument.
 2. Signal an error if no option of that level could be inserted, e.g.,
    if the buffer is read-only, the option area is outside the visible
    part of the buffer or a subrule/rule option should be inserted with
    point outside a subrule/rule.
 3. When called interactively, OPTION is read from the minibuffer with
    completion over the known options of the given LEVEL.
 4. Ask user for confirmation if the given OPTION does not seem to be a
    valid option to insert into the current file.
 5. Find a correct position to insert the option.
 6. Depending on the option, insert it the following way \(inserting an
    option also means inserting the option section if necessary\):
     - Insert the option and let user insert the value at point.
     - Read a value (with completion) from the minibuffer, using a
       previous value as initial contents, and insert option with value.
 7. Final action depending on the option.  For example, set the language
    according to a newly inserted language option.

The name of all options with a specification for their values are stored
in `antlr-options-alists'.  The used specification also depends on the
value of `antlr-tool-version', i.e., step 4 will warn you if you use an
option that has been introduced in newer version of ANTLR, and step 5
will offer completion using version-correct values.

If the option already exists inside the visible part of the buffer, this
command can be used to change the value of that option.  Otherwise, find
a correct position where the option can be inserted near point.

The search for a correct position is as follows:

  * If search is within an area where options can be inserted, use the
    position of point.  Inside the options section and if point is in
    the middle of a option definition, skip the rest of it.
  * If an options section already exists, insert the options at the end.
    If only the beginning of the area is visible, insert at the
    beginning.
  * Otherwise, find the position where an options section can be
    inserted and insert a new section before any comments.  If the
    position before the comments is not visible, insert the new section
    after the comments.

This function also inserts \"options {...}\" and the \":\" if necessary,
see `antlr-options-auto-colon'.  See also `antlr-options-assign-string'.

This command might also set the mark like \\[set-mark-command] does, see
`antlr-options-push-mark'."
  (interactive (antlr-insert-option-interactive current-prefix-arg))
  (barf-if-buffer-read-only)
  (or location (setq location (cdr (antlr-option-kind level))))
  (cond ((null level)
	 (error "Cannot deduce what kind of option to insert"))
	((atom location)
	 (error "Cannot insert any %s options around here"
		(elt antlr-options-headings (1- level)))))
  (let ((area (car location))
	(place (cdr location)))
    (cond ((null place)		; invisible
	   (error (if area
		      "Invisible %s options, use %s to make them visible"
		    "Invisible area for %s options, use %s to make it visible")
		  (elt antlr-options-headings (1- level))
		  (substitute-command-keys "\\[widen]")))
	  ((null area)			; without option part
	   (antlr-insert-option-do level option nil
				   (null (cdr place))
				   (car place)))
	  ((save-excursion		; with option part, option visible
	     (goto-char (max (point-min) (car area)))
	     (re-search-forward (concat "\\(^\\|;\\)[ \t]*\\(\\<"
					(regexp-quote option)
					"\\>\\)[ \t\n]*\\(\\(=[ \t]?\\)[ \t]*\\(\\(\\sw\\|\\s_\\)+\\|\"\\([^\n\"\\]\\|[\\][^\n]\\)*\"\\)?\\)?")
				;; 2=name, 3=4+5, 4="=", 5=value
				(min (point-max) (cdr area))
				t))
	   (antlr-insert-option-do level option
				   (cons (or (match-beginning 5)
					     (match-beginning 3))
					 (match-end 5))
				   (and (null (cdr place)) area)
				   (or (match-beginning 5)
				       (match-end 4)
				       (match-end 2))))
	  (t				; with option part, option not yet
	   (antlr-insert-option-do level option t
				   (and (null (cdr place)) area)
				   (car place))))))

(defun antlr-insert-option-interactive (arg)
  "Interactive specification for `antlr-insert-option'.
Use prefix argument ARG to return \(LEVEL OPTION LOCATION)."
  (barf-if-buffer-read-only)
  (if arg (setq arg (prefix-numeric-value arg)))
  (unless (memq arg '(nil 1 2 3 4))
    (error "Valid prefix args: no=auto, 1=file, 2=grammar, 3=rule, 4=subrule"))
  (let* ((kind (antlr-option-kind arg))
	 (level (car kind)))
    (if (atom (cdr kind))
	(list level nil (cdr kind))
      (let* ((table (elt antlr-options-alists (1- level)))
	     (completion-ignore-case t)	;dynamic
	     (input (completing-read (format "Insert %s option: "
					     (elt antlr-options-headings
						  (1- level)))
				     table)))
	(list level input (cdr kind))))))

(defun antlr-options-menu-filter (level menu-items)
  "Return items for options submenu of level LEVEL."
  ;; checkdoc-params: (menu-items)
  (let ((active (if buffer-read-only
		    nil
		  (consp (cdr-safe (cdr (antlr-option-kind level)))))))
    (mapcar (lambda (option)
	      (vector option
		      (list 'antlr-insert-option level option)
		      :active active))
	    (sort (mapcar 'car (elt antlr-options-alists (1- level)))
		  'string-lessp))))


;;;===========================================================================
;;;  Insert option: determine section-kind
;;;===========================================================================

(defun antlr-option-kind (requested)
  "Return level and location for option to insert near point.
Call function `antlr-option-level' with argument REQUESTED.  If the
result is nil, return \(REQUESTED \. error).  If the result has the
non-nil value LEVEL, return \(LEVEL \. LOCATION) where LOCATION looks
like \(AREA \. PLACE), see `antlr-option-location'."
  (save-excursion
    (save-restriction
      (let ((min0 (point-min))		; before `widen'!
	    (max0 (point-max))
	    (orig (point))
	    (level (antlr-option-level requested)) ; calls `widen'!
	    pos)
	(cond ((null level)
	       (setq level requested))
	      ((eq level 1)		; file options
	       (goto-char (point-min))
	       (setq pos (antlr-skip-file-prelude 'header-only)))
	      ((not (eq level 3))	; grammar or subrule options
	       (setq pos (point))
	       (c-forward-syntactic-ws))
	      ((looking-at "^\\(private[ \t\n]\\|public[ \t\n]\\|protected[ \t\n]\\)?[ \t\n]*\\(\\(\\sw\\|\\s_\\)+\\)[ \t\n]*\\(!\\)?[ \t\n]*\\(\\[\\)?")
	       ;; rule options, with complete rule header
	       (goto-char (or (match-end 4) (match-end 3)))
	       (setq pos (antlr-skip-sexps (if (match-end 5) 1 0)))
	       (when (looking-at "returns[ \t\n]*\\[")
		 (goto-char (1- (match-end 0)))
		 (setq pos (antlr-skip-sexps 1)))))
	(cons level
	      (cond ((null pos) 'error)
		    ((looking-at "options[ \t\n]*{")
		     (goto-char (match-end 0))
		     (setq pos (ignore-errors-x (scan-lists (point) 1 1)))
		     (antlr-option-location orig min0 max0
					    (point)
					    (if pos (1- pos) (point-max))
					    t))
		    (t
		     (antlr-option-location orig min0 max0
					    pos (point)
					    nil))))))))

(defun antlr-option-level (requested)
  "Return level for option to insert near point.
Remove any restrictions from current buffer and return level for the
option to insert near point, i.e., 1, 2, 3, 4, or nil if no such option
can be inserted.  If REQUESTED is non-nil, it is the only possible value
to return except nil.  If REQUESTED is nil, return level for the nearest
option kind, i.e., the highest number possible.

If the result is 2, point is at the beginning of the class after the
class definition.  If the result is 3 or 4, point is at the beginning of
the rule/subrule after the init action.  Otherwise, the point position
is undefined."
  (widen)
  (if (eq requested 1)
      1
    (antlr-with-syntax-table antlr-action-syntax-table
      (antlr-invalidate-context-cache)
      (let* ((orig (point))
	     (outsidep (antlr-outside-rule-p))
	     bor depth)
	(if (eq (char-after) ?\{) (antlr-skip-sexps 1))
	(setq bor (point))		; beginning of rule (after init action)
	(cond ((eq requested 2)		; grammar options required?
	       (let (boc)		; beginning of class
		 (goto-char (point-min))
		 (while (and (<= (point) bor)
			     (antlr-re-search-forward antlr-class-header-regexp
						      nil))
		   (if (<= (match-beginning 0) bor)
		       (setq boc (match-end 0))))
		 (when boc
		   (goto-char boc)
		   2)))
	      ((save-excursion		; in region of file options?
		 (goto-char (point-min))
		 (antlr-skip-file-prelude t) ; ws/comment after: OK
		 (< orig (point)))
	       (and (null requested) 1))
	      (outsidep			; outside rule not OK
	       nil)
	      ((looking-at antlr-class-header-regexp) ; rule = class def?
	       (goto-char (match-end 0))
	       (and (null requested) 2))
	      ((eq requested 3)		; rule options required?
	       (goto-char bor)
	       3)
	      ((setq depth (antlr-syntactic-grammar-depth orig bor))
	       (if (> depth 0)		; move out of actions
		   (goto-char (scan-lists (point) -1 depth)))
	       (set-syntax-table antlr-mode-syntax-table)
	       (antlr-invalidate-context-cache)
	       (if (eq (antlr-syntactic-context) 0) ; not in subrule?
		   (unless (eq requested 4)
		     (goto-char bor)
		     3)
		 (goto-char (1+ (scan-lists (point) -1 1)))
		 4)))))))

(defun antlr-option-location (orig min-vis max-vis min-area max-area withp)
  "Return location for the options area.
ORIG is the original position of `point', MIN-VIS is `point-min' and
MAX-VIS is `point-max'.  If WITHP is non-nil, there exists an option
specification and it starts after the brace at MIN-AREA and stops at
MAX-AREA.  If WITHP is nil, there is no area and the region where it
could be inserted starts at MIN-AREA and stops at MAX-AREA.

The result has the form (AREA . PLACE).  AREA is (MIN-AREA . MAX-AREA)
if WITHP is non-nil, and nil otherwise.  PLACE is nil if the area is
invisible, (ORIG) if ORIG is inside the area, (MIN-AREA . beginning) for
a visible start position and (MAX-AREA . end) for a visible end position
where the beginning is preferred if WITHP is nil and the end if WITHP is
non-nil."
  (cons (and withp (cons min-area max-area))
	(cond ((and (<= min-area orig) (<= orig max-area)
		    (save-excursion
		      (goto-char orig)
		      (not (memq (antlr-syntactic-context)
				 '(comment block-comment)))))
	       ;; point in options area and not in comment
	       (list orig))
	      ((and (null withp) (<= min-vis min-area) (<= min-area max-vis))
	       ;; use start of options area (only if not `withp')
	       (cons min-area 'beginning))
	      ((and (<= min-vis max-area) (<= max-area max-vis))
	       ;; use end of options area
	       (cons max-area 'end))
	      ((and withp (<= min-vis min-area) (<= min-area max-vis))
	       ;; use start of options area (only if `withp')
	       (cons min-area 'beginning)))))

(defun antlr-syntactic-grammar-depth (pos beg)
  "Return syntactic context depth at POS.
Move to POS and from there on to the beginning of the string or comment
if POS is inside such a construct.  Then, return the syntactic context
depth at point if the point position is smaller than BEG.
WARNING: this may alter `match-data'."
  (goto-char pos)
  (let ((context (or (antlr-syntactic-context) 0)))
    (while (and context (not (integerp context)))
      (cond ((eq context 'string)
	     (setq context
		   (and (search-backward "\"" nil t)
			(>= (point) beg)
			(or (antlr-syntactic-context) 0))))
	    ((memq context '(comment block-comment))
	     (setq context
		   (and (re-search-backward "/[/*]" nil t)
			(>= (point) beg)
			(or (antlr-syntactic-context) 0))))))
    context))


;;;===========================================================================
;;;  Insert options: do the insertion
;;;===========================================================================

(defun antlr-insert-option-do (level option old area pos)
  "Insert option into buffer at position POS.
Insert option of level LEVEL and name OPTION.  If OLD is non-nil, an
options area is already exists.  If OLD looks like \(BEG \. END), the
option already exists.  Then, BEG is the start position of the option
value, the position of the `=' or nil, and END is the end position of
the option value or nil.

If the original point position was outside an options area, AREA is nil.
Otherwise, and if an option specification already exists, AREA is a cons
cell where the two values determine the area inside the braces."
  (let* ((spec (cdr (assoc option (elt antlr-options-alists (1- level)))))
	 (value (antlr-option-spec level option (cdr spec) (consp old))))
    (if (fboundp (car spec)) (funcall (car spec) 'before-input option))
    ;; set mark (unless point was inside options area before)
    (if (cond (area (eq antlr-options-push-mark t))
	      ((numberp antlr-options-push-mark)
	       (> (count-lines (min (point) pos) (max (point) pos))
		  antlr-options-push-mark))
	      (antlr-options-push-mark))
	(push-mark))
    ;; read option value -----------------------------------------------------
    (goto-char pos)
    (if (null value)
	;; no option specification found
	(if (y-or-n-p (format "Insert unknown %s option %s? "
			      (elt antlr-options-headings (1- level))
			      option))
	    (message "Insert value for %s option %s"
		     (elt antlr-options-headings (1- level))
		     option)
	  (error "Didn't insert unknown %s option %s"
		 (elt antlr-options-headings (1- level))
		 option))
      ;; option specification found
      (setq value (cdr value))
      (if (car value)
	  (let ((initial (and (consp old) (cdr old)
			      (buffer-substring (car old) (cdr old)))))
	    (setq value (apply (car value)
			       (and initial
				    (if (eq (aref initial 0) ?\")
					(read initial)
				      initial))
			       (cdr value))))
	(message (cadr value))
	(setq value nil)))
    ;; insert value ----------------------------------------------------------
    (if (consp old)
	(antlr-insert-option-existing old value)
      (if (consp area)
	  ;; Move outside string/comment if point is inside option spec
	  (antlr-syntactic-grammar-depth (point) (car area)))
      (antlr-insert-option-space area old)
      (or old (antlr-insert-option-area level))
      (insert option " = ;")
      (backward-char)
      (if value (insert value)))
    ;; final -----------------------------------------------------------------
    (if (fboundp (car spec)) (funcall (car spec) 'after-insertion option))))

(defun antlr-option-spec (level option specs existsp)
  "Return version correct option value specification.
Return specification for option OPTION of kind level LEVEL.  SPECS
should correspond to the VALUE-SPEC... in `antlr-option-alists'.
EXISTSP determines whether the option already exists."
  (let (value)
    (while (and specs (>= antlr-tool-version (caar specs)))
      (setq value (pop specs)))
    (cond (value)			; found correct spec
	  ((null specs) nil)		; didn't find any specs
	  (existsp (car specs))	; wrong version, but already present
	  ((y-or-n-p (format "Insert v%s %s option %s in v%s? "
			     (antlr-version-string (caar specs))
			     (elt antlr-options-headings (1- level))
			     option
			     (antlr-version-string antlr-tool-version)))
	   (car specs))
	  (t
	   (error "Didn't insert v%s %s option %s in v%s"
		  (antlr-version-string (caar specs))
		  (elt antlr-options-headings (1- level))
		  option
		  (antlr-version-string antlr-tool-version))))))

(defun antlr-version-string (version)
  "Format the Antlr version number VERSION, see `antlr-tool-version'."
  (let ((version100 (/ version 100)))
    (format "%d.%d.%d"
	    (/ version100 100) (mod version100 100) (mod version 100))))


;;;===========================================================================
;;;  Insert options: the details (used by `antlr-insert-option-do')
;;;===========================================================================

(defun antlr-insert-option-existing (old value)
  "Insert option value VALUE at point for existing option.
For OLD, see `antlr-insert-option-do'."
  ;; no = => insert =
  (unless (car old) (insert antlr-options-assign-string))
  ;; with user input => insert if necessary
  (when value
    (if (cdr old)		; with value
	(if (string-equal value (buffer-substring (car old) (cdr old)))
	    (goto-char (cdr old))
	  (delete-region (car old) (cdr old))
	  (insert value))
      (insert value)))
  (unless (looking-at "\\([^\n=;{}/'\"]\\|'\\([^\n'\\]\\|\\\\.\\)*'\\|\"\\([^\n\"\\]\\|\\\\.\\)*\"\\)*;")
    ;; stuff (no =, {, } or /) at point is not followed by ";"
    (insert ";")
    (backward-char)))

(defun antlr-insert-option-space (area old)
  "Find appropriate place to insert option, insert newlines/spaces.
For AREA and OLD, see `antlr-insert-option-do'."
  (let ((orig (point))
	(open t))
    (skip-chars-backward " \t")
    (unless (bolp)
      (let ((before (char-after (1- (point)))))
	(goto-char orig)
	(and old			; with existing options area
	     (consp area)		; if point inside existing area
	     (not (eq before ?\;))	; if not at beginning of option
					; => skip to end of option
	     (if (and (search-forward ";" (cdr area) t)
		      (let ((context (antlr-syntactic-context)))
			(or (null context) (numberp context))))
		 (setq orig (point))
	       (goto-char orig)))
	(skip-chars-forward " \t")

	(if (looking-at "$\\|//")
	    ;; just comment after point => skip (+ lines w/ same col comment)
	    (let ((same (if (> (match-end 0) (match-beginning 0))
			    (current-column))))
	      (beginning-of-line 2)
	      (or (bolp) (insert "\n"))
	      (when (and same (null area)) ; or (consp area)?
		(while (and (looking-at "[ \t]*\\(//\\)")
			    (goto-char (match-beginning 1))
			    (= (current-column) same))
		  (beginning-of-line 2)
		  (or (bolp) (insert "\n")))))
	  (goto-char orig)
	  (if (null old)
	      (progn (insert "\n") (antlr-indent-line))
	    (unless (eq (char-after (1- (point))) ?\ )
	      (insert " "))
	    (unless (eq (char-after (point)) ?\ )
	      (insert " ")
	      (backward-char))
	    (setq open nil)))))
    (when open
      (beginning-of-line 1)
      (insert "\n")
      (backward-char)
      (antlr-indent-line))))

(defun antlr-insert-option-area (level)
  "Insert new options area for options of level LEVEL.
Used by `antlr-insert-option-do'."
  (insert "options {\n\n}")
  (when (and antlr-options-auto-colon
	     (memq level '(3 4))
	     (save-excursion
	       (c-forward-syntactic-ws)
	       (if (eq (char-after (point)) ?\{) (antlr-skip-sexps 1))
	       (not (eq (char-after (point)) ?\:))))
    (insert "\n:")
    (antlr-indent-line)
    (end-of-line 0))
  (backward-char 1)
  (antlr-indent-line)
  (beginning-of-line 0)
  (antlr-indent-line))


;;;===========================================================================
;;;  Insert options: in `antlr-options-alists'
;;;===========================================================================

(defun antlr-read-value (initial-contents prompt
					  &optional as-string table table-x)
  "Read a string from the minibuffer, possibly with completion.
If INITIAL-CONTENTS is non-nil, insert it in the minibuffer initially.
PROMPT is a string to prompt with, normally it ends in a colon and a
space.  If AS-STRING is t or is a member \(comparison done with `eq') of
`antlr-options-style', return printed representation of the user input,
otherwise return the user input directly.

If TABLE or TABLE-X is non-nil, read with completion.  The completion
table is the resulting alist of TABLE-X concatenated with TABLE where
TABLE can also be a function evaluation to an alist.

Used inside `antlr-options-alists'."
  (let* ((completion-ignore-case t)	; dynamic
	 (table0 (and (or table table-x)
		      (append table-x
			      (if (functionp table) (funcall table) table))))
	 (input (if table0
		    (completing-read prompt table0 nil nil initial-contents)
		  (read-from-minibuffer prompt initial-contents))))
    (if (and as-string
	     (or (eq as-string t)
		 (cdr (assq as-string antlr-options-style))))
	(format "%S" input)
      input)))

(defun antlr-read-boolean (initial-contents prompt &optional table)
  "Read a boolean value from the minibuffer, with completion.
If INITIAL-CONTENTS is non-nil, insert it in the minibuffer initially.
PROMPT is a string to prompt with, normally it ends in a question mark
and a space.  \"(true or false) \" is appended if TABLE is nil.

Read with completion over \"true\", \"false\" and the keys in TABLE, see
also `antlr-read-value'.

Used inside `antlr-options-alists'."
  (antlr-read-value initial-contents
		    (if table prompt (concat prompt "(true or false) "))
		    nil
		    table '(("false") ("true"))))

(defun antlr-language-option-extra (phase &rest dummies)
;; checkdoc-params: (dummies)
  "Change language according to the new value of the \"language\" option.
Call `antlr-mode' if the new language would be different from the value
of `antlr-language', keeping the value of variable `font-lock-mode'.

Called in PHASE `after-insertion', see `antlr-options-alists'."
  (when (eq phase 'after-insertion)
    (let ((new-language (antlr-language-option t)))
      (or (null new-language)
	  (eq new-language antlr-language)
	  (let ((font-lock (and (boundp 'font-lock-mode) font-lock-mode)))
	    (if font-lock (font-lock-mode 0))
	    (antlr-mode)
	    (and font-lock (null font-lock-mode) (font-lock-mode 1)))))))

(defun antlr-c++-mode-extra (phase option &rest dummies)
;; checkdoc-params: (option dummies)
  "Warn if C++ option is used with the wrong language.
Ask user \(\"y or n\"), if a C++ only option is going to be inserted but
`antlr-language' has not the value `c++-mode'.

Called in PHASE `before-input', see `antlr-options-alists'."
  (and (eq phase 'before-input)
       (not (eq antlr-language 'c++-mode))
       (not (y-or-n-p (format "Insert C++ %s option? " option)))
       (error "Didn't insert C++ %s option with language %s"
	      option (cadr (assq antlr-language antlr-language-alist)))))


;;;===========================================================================
;;;  Compute dependencies
;;;===========================================================================

(defun antlr-file-dependencies ()
  "Return dependencies for grammar in current buffer.
The result looks like \(FILE \(CLASSES \. SUPERS) VOCABS \. LANGUAGE)
  where CLASSES = ((CLASS . CLASS-EVOCAB) ...),
        SUPERS  = ((SUPER . USE-EVOCAB-P) ...), and
        VOCABS  = ((EVOCAB ...) . (IVOCAB ...))

FILE is the current buffer's file-name without directory part and
LANGUAGE is the value of `antlr-language' in the current buffer.  Each
EVOCAB is an export vocabulary and each IVOCAB is an import vocabulary.

Each CLASS is a grammar class with its export vocabulary CLASS-EVOCAB.
Each SUPER is a super-grammar class where USE-EVOCAB-P indicates whether
its export vocabulary is used as an import vocabulary."
  (unless buffer-file-name
    (error "Grammar buffer does not visit a file"))
  (let (classes export-vocabs import-vocabs superclasses default-vocab)
    (antlr-with-syntax-table antlr-action-syntax-table
      (goto-char (point-min))
      (while (antlr-re-search-forward antlr-class-header-regexp nil)
	;; parse class definition --------------------------------------------
	(let* ((class (match-string 2))
	       (sclass (match-string 4))
	       ;; export vocab defaults to class name (first grammar in file)
	       ;; or to the export vocab of the first grammar in file:
	       (evocab (or default-vocab class))
	       (ivocab nil))
	  (goto-char (match-end 0))
	  (c-forward-syntactic-ws)
	  (while (looking-at "options\\>\\|\\(tokens\\)\\>")
	    (if (match-beginning 1)
		(antlr-skip-sexps 2)
	      (goto-char (match-end 0))
	      (c-forward-syntactic-ws)
	      ;; parse grammar option sections -------------------------------
	      (when (eq (char-after (point)) ?\{)
		(let* ((beg (1+ (point)))
		       (end (1- (antlr-skip-sexps 1)))
		       (cont (point)))
		(goto-char beg)
		(if (re-search-forward "\\<exportVocab[ \t]*=[ \t]*\\([A-Za-z\300-\326\330-\337]\\sw*\\)" end t)
		    (setq evocab (match-string 1)))
		(goto-char beg)
		(if (re-search-forward "\\<importVocab[ \t]*=[ \t]*\\([A-Za-z\300-\326\330-\337]\\sw*\\)" end t)
		    (setq ivocab (match-string 1)))
		(goto-char cont)))))
	  (unless (member sclass '("Parser" "Lexer" "TreeParser"))
	    (let ((super (assoc sclass superclasses)))
	      (if super
		  (or ivocab (setcdr super t))
		(push (cons sclass (null ivocab)) superclasses))))
	  ;; remember class with export vocabulary:
	  (push (cons class evocab) classes)
	  ;; default export vocab is export vocab of first grammar in file:
	  (or default-vocab (setq default-vocab evocab))
	  (or (member evocab export-vocabs) (push evocab export-vocabs))
	  (or (null ivocab)
	      (member ivocab import-vocabs) (push ivocab import-vocabs)))))
    (if classes
	(list* (file-name-nondirectory buffer-file-name)
	       (cons (nreverse classes) (nreverse superclasses))
	       (cons (nreverse export-vocabs) (nreverse import-vocabs))
	       antlr-language))))

(defun antlr-directory-dependencies (dirname)
  "Return dependencies for all grammar files in directory DIRNAME.
The result looks like \((CLASS-SPEC ...) \. \(FILE-DEP ...))
  where CLASS-SPEC = (CLASS (FILE \. EVOCAB) ...).

FILE-DEP are the dependencies for each grammar file in DIRNAME, see
`antlr-file-dependencies'.  For each grammar class CLASS, FILE is a
grammar file in which CLASS is defined and EVOCAB is the name of the
export vocabulary specified in that file."
  (let ((grammar (directory-files dirname t "\\.g\\'")))
    (when grammar
      (let ((temp-buffer (get-buffer-create
			  (generate-new-buffer-name " *temp*")))
	    (antlr-imenu-name nil)		; dynamic-let: no imenu
	    (expanded-regexp (concat (format (regexp-quote
					      (cadr antlr-special-file-formats))
					     ".+")
				     "\\'"))
	    classes dependencies)
	(unwind-protect
	    (save-excursion
	      (set-buffer temp-buffer)
	      (widen)			; just in case...
	      (dolist (file grammar)
		(when (and (file-regular-p file)
			   (null (string-match expanded-regexp file)))
		  (insert-file-contents file t nil nil t)
		  (normal-mode t)	; necessary for major-mode, syntax
					; table and `antlr-language'
		  (when (eq major-mode 'antlr-mode)
		    (let* ((file-deps (antlr-file-dependencies))
			   (file (car file-deps)))
		      (when file-deps
			(dolist (class-def (caadr file-deps))
			  (let ((file-evocab (cons file (cdr class-def)))
				(class-spec (assoc (car class-def) classes)))
			    (if class-spec
				(nconc (cdr class-spec) (list file-evocab))
			      (push (list (car class-def) file-evocab)
				    classes))))
			(push file-deps dependencies)))))))
	  (kill-buffer temp-buffer))
	(cons (nreverse classes) (nreverse dependencies))))))


;;;===========================================================================
;;;  Compilation: run ANTLR tool
;;;===========================================================================

(defun antlr-superclasses-glibs (supers classes)
  "Compute the grammar lib option for the super grammars SUPERS.
Look in CLASSES for the right grammar lib files for SUPERS.  SUPERS is
part SUPER in the result of `antlr-file-dependencies'.  CLASSES is the
part \(CLASS-SPEC ...) in the result of `antlr-directory-dependencies'.

The result looks like \(OPTION WITH-UNKNOWN GLIB ...).  OPTION is the
complete \"-glib\" option.  WITH-UNKNOWN has value t iff there is none
or more than one grammar file for at least one super grammar.

Each GLIB looks like \(GRAMMAR-FILE \. EVOCAB).  GRAMMAR-FILE is a file
in which a super-grammar is defined.  EVOCAB is the value of the export
vocabulary of the super-grammar or nil if it is not needed."
  ;; If the superclass is defined in the same file, that file will be included
  ;; with -glib again.  This will lead to a redefinition.  But defining a
  ;; analyzer of the same class twice in a file will lead to an error anyway...
  (let (glibs unknown)
    (while supers
      (let* ((super (pop supers))
	     (sup-files (cdr (assoc (car super) classes)))
	     (file (and sup-files (null (cdr sup-files)) (car sup-files))))
	(or file (setq unknown t))	; not exactly one file
	(push (cons (or (car file)
			(format (car antlr-unknown-file-formats)
				(car super)))
		    (and (cdr super)
			 (or (cdr file)
			     (format (cadr antlr-unknown-file-formats)
				     (car super)))))
	      glibs)))
    (cons (if glibs (concat " -glib " (mapconcat 'car glibs ";")) "")
	  (cons unknown glibs))))

(defun antlr-run-tool (command file &optional saved)
  "Run Antlr took COMMAND on grammar FILE.
When called interactively, COMMAND is read from the minibuffer and
defaults to `antlr-tool-command' with a computed \"-glib\" option if
necessary.

Save all buffers first unless optional value SAVED is non-nil.  When
called interactively, the buffers are always saved, see also variable
`antlr-ask-about-save'."
  (interactive (antlr-run-tool-interactive))
  (or saved (save-some-buffers (not antlr-ask-about-save)))
  (let ((default-directory (file-name-directory file)))
    (require 'compile)			; only `compile' autoload
    (compile-internal (concat command " " (file-name-nondirectory file))
		      "No more errors" "Antlr-Run")))

(defun antlr-run-tool-interactive ()
  ;; code in `interactive' is not compiled
  "Interactive specification for `antlr-run-tool'.
Use prefix argument ARG to return \(COMMAND FILE SAVED)."
  (let* ((supers (cdadr (save-excursion
			  (save-restriction
			    (widen)
			    (antlr-file-dependencies)))))
	 (glibs ""))
    (when supers
      (save-some-buffers (not antlr-ask-about-save) nil)
      (setq glibs (car (antlr-superclasses-glibs
			supers
			(car (antlr-directory-dependencies
			      (antlr-default-directory)))))))
    (list (antlr-read-shell-command "Run Antlr on current file with: "
				    (concat antlr-tool-command glibs " "))
	  buffer-file-name
	  supers)))


;;;===========================================================================
;;;  Makefile creation
;;;===========================================================================

(defun antlr-makefile-insert-variable (number pre post)
  "Insert Makefile variable numbered NUMBER according to specification.
Also insert strings PRE and POST before and after the variable."
  (let ((spec (cadr antlr-makefile-specification)))
    (when spec
      (insert pre
	      (if number (format (cadr spec) number) (car spec))
	      post))))

(defun antlr-insert-makefile-rules (&optional in-makefile)
  "Insert Makefile rules in the current buffer at point.
IN-MAKEFILE is non-nil, if the current buffer is the Makefile.  See
command `antlr-show-makefile-rules' for detail."
  (let* ((dirname (antlr-default-directory))
	 (deps0 (antlr-directory-dependencies dirname))
	 (classes (car deps0))		; CLASS -> (FILE . EVOCAB) ...
	 (deps (cdr deps0))		; FILE -> (c . s) (ev . iv) . LANGUAGE
	 (with-error nil)
	 (gen-sep (or (caddr (cadr antlr-makefile-specification)) " "))
	 (n (and (cdr deps) (cadr antlr-makefile-specification) 0)))
    (or in-makefile (set-buffer standard-output))
    (dolist (dep deps)
      (let ((supers (cdadr dep))
	    (lang (cdr (assoc (cdddr dep) antlr-file-formats-alist))))
	(if n (incf n))
	(antlr-makefile-insert-variable n "" " =")
	(if supers
	    (insert " "
		    (format (cadr antlr-special-file-formats)
			    (file-name-sans-extension (car dep)))))
	(dolist (class-def (caadr dep))
	  (let ((sep gen-sep))
	    (dolist (class-file (cadr lang))
	      (insert sep (format class-file (car class-def)))
	      (setq sep " "))))
	(dolist (evocab (caaddr dep))
	  (let ((sep gen-sep))
	    (dolist (vocab-file (cons (car antlr-special-file-formats)
				      (car lang)))
	      (insert sep (format vocab-file evocab))
	      (setq sep " "))))
	(antlr-makefile-insert-variable n "\n$(" ")")
	(insert ": " (car dep))
	(dolist (ivocab (cdaddr dep))
	  (insert " " (format (car antlr-special-file-formats) ivocab)))
	(let ((glibs (antlr-superclasses-glibs supers classes)))
	  (if (cadr glibs) (setq with-error t))
	  (dolist (super (cddr glibs))
	    (insert " " (car super))
	    (if (cdr super)
		(insert " " (format (car antlr-special-file-formats)
				    (cdr super)))))
	  (insert "\n\t"
		  (caddr antlr-makefile-specification)
		  (car glibs)
		  " $<\n"
		  (car antlr-makefile-specification)))))
    (if n
	(let ((i 0))
	  (antlr-makefile-insert-variable nil "" " =")
	  (while (<= (incf i) n)
	    (antlr-makefile-insert-variable i " $(" ")"))
	  (insert "\n" (car antlr-makefile-specification))))
    (if (string-equal (car antlr-makefile-specification) "\n")
	(backward-delete-char 1))
    (when with-error
      (goto-char (point-min))
      (insert antlr-help-unknown-file-text))
    (unless in-makefile
      (copy-region-as-kill (point-min) (point-max))
      (goto-char (point-min))
      (insert (format antlr-help-rules-intro dirname)))))

;;;###autoload
(defun antlr-show-makefile-rules ()
  "Show Makefile rules for all grammar files in the current directory.
If the `major-mode' of the current buffer has the value `makefile-mode',
the rules are directory inserted at point.  Otherwise, a *Help* buffer
is shown with the rules which are also put into the `kill-ring' for
\\[yank].

This command considers import/export vocabularies and grammar
inheritance and provides a value for the \"-glib\" option if necessary.
Customize variable `antlr-makefile-specification' for the appearance of
the rules.

If the file for a super-grammar cannot be determined, special file names
are used according to variable `antlr-unknown-file-formats' and a
commentary with value `antlr-help-unknown-file-text' is added.  The
*Help* buffer always starts with the text in `antlr-help-rules-intro'."
  (interactive)
  (if (null (eq major-mode 'makefile-mode))
      (antlr-with-displaying-help-buffer 'antlr-insert-makefile-rules)
    (push-mark)
    (antlr-insert-makefile-rules t)))


;;;===========================================================================
;;;  Indentation
;;;===========================================================================

(defun antlr-indent-line ()
  "Indent the current line as ANTLR grammar code.
The indentation of non-comment lines are calculated by `c-basic-offset',
multiplied by:
 - the level of the paren/brace/bracket depth,
 - plus 0/2/1, depending on the position inside the rule: header, body,
   exception part,
 - minus 1 if `antlr-indent-item-regexp' matches the beginning of the
   line starting from the first non-whitespace.

Lines inside block comments are indented by `c-indent-line' according to
`antlr-indent-comment'.

Lines in actions except top-level actions in a header part or an option
area are indented by `c-indent-line'.

Lines in header actions are indented at column 0 if `antlr-language'
equals to a key in `antlr-indent-at-bol-alist' and the line starting at
the first non-whitespace is matched by the corresponding value.

For the initialization of `c-basic-offset', see `antlr-indent-style' and,
to a lesser extent, `antlr-tab-offset-alist'."
  (save-restriction
    (let ((orig (point))
	  (min0 (point-min))
	  bol boi indent syntax cc-syntax)
      (widen)
      (beginning-of-line)
      (setq bol (point))
      (if (< bol min0)
	  (error "Beginning of current line not visible"))
      (skip-chars-forward " \t")
      (setq boi (point))
      ;; check syntax at beginning of indentation ----------------------------
      (antlr-with-syntax-table antlr-action-syntax-table
	(antlr-invalidate-context-cache)
	(setq syntax (antlr-syntactic-context))
	(cond ((symbolp syntax)
	       (setq indent nil))	; block-comments, strings, (comments)
	      ((progn
		 (antlr-next-rule -1 t)
		 (if (antlr-search-forward ":") (< boi (1- (point))) t))
	       (setq indent 0))		; in rule header
	      ((if (antlr-search-forward ";") (< boi (point)) t)
	       (setq indent 2))		; in rule body
	      (t
	       (forward-char)
	       (antlr-skip-exception-part nil)
	       (setq indent (if (> (point) boi) 1 0))))) ; in exception part?
      ;; check whether to use indentation engine of cc-mode ------------------
      (antlr-invalidate-context-cache)
      (goto-char boi)
      (when (and indent (> syntax 0))
	(cond ((> syntax 1)		; block in action => use cc-mode
	       (setq indent nil))
	      ((and (= indent 0)
		    (assq antlr-language antlr-indent-at-bol-alist)
		    (looking-at (cdr (assq antlr-language
					   antlr-indent-at-bol-alist))))
	       (setq syntax 'bol))
	      ((setq cc-syntax (c-guess-basic-syntax))
	       (let ((cc cc-syntax) symbol)
		 (while (setq symbol (pop cc))
		   (when (cdr symbol)
		     (or (memq (car symbol)
			       antlr-disabling-cc-syntactic-symbols)
			 (setq indent nil))
		     (setq cc nil)))))))
;;;		((= indent 1)		; exception part => use cc-mode
;;;		 (setq indent nil))
;;;		((save-restriction	; not in option part => cc-mode
;;;		   (goto-char (scan-lists (point) -1 1))
;;;		   (skip-chars-backward " \t\n")
;;;		   (narrow-to-region (point-min) (point))
;;;		   (not (re-search-backward "\\<options\\'" nil t)))
;;;		 (setq indent nil)))))
	;; compute the corresponding indentation and indent --------------------
      (if (null indent)
	  ;; Use the indentation engine of cc-mode
	  (progn
	    (goto-char orig)
	    (if (or (numberp syntax)
		    (if (eq syntax 'string) nil (eq antlr-indent-comment t)))
		(c-indent-line cc-syntax)))
	;; do it ourselves
	(goto-char boi)
	(unless (symbolp syntax)		; direct indentation
	  ;;(antlr-invalidate-context-cache)
	  (incf indent (antlr-syntactic-context))
	  (and (> indent 0) (looking-at antlr-indent-item-regexp) (decf indent))
	  (setq indent (* indent c-basic-offset)))
	;; the usual major-mode indent stuff ---------------------------------
	(setq orig (- (point-max) orig))
	(unless (= (current-column) indent)
	  (delete-region bol boi)
	  (beginning-of-line)
	  (indent-to indent))
	;; If initial point was within line's indentation,
	;; position after the indentation.  Else stay at same point in text.
	(if (> (- (point-max) orig) (point))
	    (goto-char (- (point-max) orig)))))))

(defun antlr-indent-command (&optional arg)
  "Indent the current line or insert tabs/spaces.
With optional prefix argument ARG or if the previous command was this
command, insert ARG tabs or spaces according to `indent-tabs-mode'.
Otherwise, indent the current line with `antlr-indent-line'."
  (interactive "*P")
  (if (or arg (eq last-command 'antlr-indent-command))
      (insert-tab arg)
    (let ((antlr-indent-comment (and antlr-indent-comment t))) ; dynamic
      (antlr-indent-line))))

(defun antlr-electric-character (&optional arg)
  "Insert the character you type and indent the current line.
Insert the character like `self-insert-command' and indent the current
line as `antlr-indent-command' does.  Do not indent the line if

 * this command is called with a prefix argument ARG,
 * there are characters except whitespaces between point and the
   beginning of the line, or
 * point is not inside a normal grammar code, { and } are also OK in
   actions.

This command is useful for a character which has some special meaning in
ANTLR's syntax and influences the auto indentation, see
`antlr-indent-item-regexp'."
  (interactive "*P")
  (if (or arg
	  (save-excursion (skip-chars-backward " \t") (not (bolp)))
	  (antlr-with-syntax-table antlr-action-syntax-table
	    (antlr-invalidate-context-cache)
	    (let ((context (antlr-syntactic-context)))
	      (not (and (numberp context)
			(or (zerop context)
			    (memq last-command-char '(?\{ ?\}))))))))
      (self-insert-command (prefix-numeric-value arg))
    (self-insert-command (prefix-numeric-value arg))
    (antlr-indent-line)))


;;;===========================================================================
;;;  Mode entry
;;;===========================================================================

(defun antlr-c-common-init ()
  "Like `c-common-init' except menu, auto-hungry and c-style stuff."
  ;; X/Emacs 20 only
  (make-local-variable 'paragraph-start)
  (make-local-variable 'paragraph-separate)
  (make-local-variable 'paragraph-ignore-fill-prefix)
  (make-local-variable 'require-final-newline)
  (make-local-variable 'parse-sexp-ignore-comments)
  (make-local-variable 'indent-line-function)
  (make-local-variable 'indent-region-function)
  (make-local-variable 'comment-start)
  (make-local-variable 'comment-end)
  (make-local-variable 'comment-column)
  (make-local-variable 'comment-start-skip)
  (make-local-variable 'comment-multi-line)
  (make-local-variable 'outline-regexp)
  (make-local-variable 'outline-level)
  (make-local-variable 'adaptive-fill-regexp)
  (make-local-variable 'adaptive-fill-mode)
  (make-local-variable 'imenu-generic-expression) ;set in the mode functions
  (and (boundp 'comment-line-break-function)
       (make-local-variable 'comment-line-break-function))
  ;; Emacs 19.30 and beyond only, AFAIK
  (if (boundp 'fill-paragraph-function)
      (progn
	(make-local-variable 'fill-paragraph-function)
	(setq fill-paragraph-function 'c-fill-paragraph)))
  ;; now set their values
  (setq paragraph-start (concat page-delimiter "\\|$")
	paragraph-separate paragraph-start
	paragraph-ignore-fill-prefix t
	require-final-newline t
	parse-sexp-ignore-comments t
	indent-line-function 'c-indent-line
	indent-region-function 'c-indent-region
	outline-regexp "[^#\n\^M]"
	outline-level 'c-outline-level
	comment-column 32
	comment-start-skip "/\\*+ *\\|// *"
	comment-multi-line nil
	comment-line-break-function 'c-comment-line-break-function
	adaptive-fill-regexp nil
	adaptive-fill-mode nil)
  (c-set-style (or antlr-indent-style "gnu"))
  (and (boundp 'c-current-comment-prefix) (boundp 'c-comment-prefix-regexp)
       (setq c-current-comment-prefix
	     (if (listp c-comment-prefix-regexp)
		 (cdr-safe (or (assoc major-mode c-comment-prefix-regexp)
			       (assoc 'other c-comment-prefix-regexp)))
	       c-comment-prefix-regexp)))
  ;; we have to do something special for c-offsets-alist so that the
  ;; buffer local value has its own alist structure.
  (setq c-offsets-alist (copy-alist c-offsets-alist))
  ;; setup the comment indent variable in a Emacs version portable way
  ;; ignore any byte compiler warnings you might get here
  (make-local-variable 'comment-indent-function)
  (setq comment-indent-function 'c-comment-indent))

(defun antlr-language-option (search)
  "Find language in `antlr-language-alist' for language option.
If SEARCH is non-nil, find element for language option.  Otherwise, find
the default language."
  (let ((value (and search
		    (save-excursion
		      (goto-char (point-min))
		      (re-search-forward (cdr antlr-language-limit-n-regexp)
					 (car antlr-language-limit-n-regexp)
					 t))
		    (match-string 1)))
	(seq antlr-language-alist)
	r)
    ;; Like (find VALUE antlr-language-alist :key 'cddr :test 'member)
    (while seq
      (setq r (pop seq))
      (if (member value (cddr r))
	  (setq seq nil)		; stop
	(setq r nil)))			; no result yet
    (car r)))


;;;###autoload
(defun antlr-mode ()
  "Major mode for editing ANTLR grammar files.
\\{antlr-mode-map}"
  (interactive)
  (c-initialize-cc-mode)		; required when depending on cc-mode
  (kill-all-local-variables)
  ;; ANTLR specific ----------------------------------------------------------
  (setq major-mode 'antlr-mode
	mode-name "Antlr")
  (setq local-abbrev-table antlr-mode-abbrev-table)
  (unless antlr-mode-syntax-table
    (setq antlr-mode-syntax-table (make-syntax-table))
    (c-populate-syntax-table antlr-mode-syntax-table))
  (set-syntax-table antlr-mode-syntax-table)
  (unless antlr-action-syntax-table
    (let ((slist (nth 3 antlr-font-lock-defaults)))
      (setq antlr-action-syntax-table
	    (copy-syntax-table antlr-mode-syntax-table))
      (while slist
	(modify-syntax-entry (caar slist) (cdar slist)
			     antlr-action-syntax-table)
	(setq slist (cdr slist)))))
  (use-local-map antlr-mode-map)
  (make-local-variable 'antlr-language)
  (unless antlr-language
    (setq antlr-language
	  (or (antlr-language-option t) (antlr-language-option nil))))
  (if (stringp (cadr (assq antlr-language antlr-language-alist)))
      (setq mode-name
	    (concat "Antlr."
		    (cadr (assq antlr-language antlr-language-alist)))))
  ;; indentation, for the C engine -------------------------------------------
  (antlr-c-common-init)
  (setq indent-line-function 'antlr-indent-line
	indent-region-function nil)	; too lazy
  (setq c-buffer-is-cc-mode antlr-language)
  (if (fboundp 'c-init-language-vars)
      (c-init-language-vars)		; cc-mode >= v5.29
    (let ((settings			; (cdr '(setq...)) will be optimized
	   (if (eq antlr-language 'c++-mode)
	       (cdr '(setq		;' from `c++-mode' v5.20, v5.28
		      c-keywords (c-identifier-re c-C++-keywords)
		      c-conditional-key c-C++-conditional-key
		      c-comment-start-regexp c-C++-comment-start-regexp
		      c-class-key c-C++-class-key
		      c-extra-toplevel-key c-C++-extra-toplevel-key
		      c-access-key c-C++-access-key
		      c-recognize-knr-p nil
		      c-bitfield-key c-C-bitfield-key ; v5.28
		      ))
	     (cdr '(setq		; from `java-mode' v5.20, v5.28
		    c-keywords (c-identifier-re c-Java-keywords)
		    c-conditional-key c-Java-conditional-key
		    c-comment-start-regexp c-Java-comment-start-regexp
		    c-class-key c-Java-class-key
		    c-method-key nil
		    c-baseclass-key nil
		    c-recognize-knr-p nil
		    c-access-key c-Java-access-key ; v5.20
		    c-inexpr-class-key c-Java-inexpr-class-key ; v5.28
		    )))))
      (while settings
	(when (boundp (car settings))
	  (ignore-errors
	    (set (car settings) (eval (cadr settings)))))
	(setq settings (cddr settings)))))
  (setq comment-start "// "
 	comment-end "")
  ;; various -----------------------------------------------------------------
  (make-local-variable 'font-lock-defaults)
  (setq font-lock-defaults antlr-font-lock-defaults)
  (easy-menu-add antlr-mode-menu)
  (make-local-variable 'imenu-create-index-function)
  (setq imenu-create-index-function 'antlr-imenu-create-index-function)
  (make-local-variable 'imenu-generic-expression)
  (setq imenu-generic-expression t)	; fool stupid test
  (and antlr-imenu-name			; there should be a global variable...
       (fboundp 'imenu-add-to-menubar)
       (imenu-add-to-menubar
	(if (stringp antlr-imenu-name) antlr-imenu-name "Index")))
  (antlr-set-tabs)
  (run-hooks 'antlr-mode-hook))

;; A smarter version of `group-buffers-menu-by-mode-then-alphabetically' (in
;; XEmacs) could use the following property.  The header of the submenu would
;; be "Antlr" instead of "Antlr.C++" or (not and!) "Antlr.Java".
(put 'antlr-mode 'mode-name "Antlr")

;;;###autoload
(defun antlr-set-tabs ()
  "Use ANTLR's convention for TABs according to `antlr-tab-offset-alist'.
Used in `antlr-mode'.  Also a useful function in `java-mode-hook'."
  (if buffer-file-name
      (let ((alist antlr-tab-offset-alist) elem)
	(while alist
	  (setq elem (pop alist))
	  (and (or (null (car elem)) (eq (car elem) major-mode))
	       (or (null (cadr elem))
		   (string-match (cadr elem) buffer-file-name))
	       (setq tab-width (caddr elem)
		     indent-tabs-mode (cadddr elem)
		     alist nil))))))

;;; Local IspellPersDict: .ispell_antlr
;;; antlr-mode.el ends here