global: remove unnecessary horizontal tabs.

This change was made by applying emacs' untabify function to
nearly all files in Bison's repository.  Required tabs in make
files, ChangeLog, regexps, and test code were manually skipped.
Other notable exceptions and changes are listed below.
* bootstrap: Skip because we sync this with gnulib.
* data/m4sugar/foreach.m4
* data/m4sugar/m4sugar.m4: Skip because we sync these with
Autoconf.
* djgpp: Skip because I don't know how to test djgpp properly, and
this code appears to be unmaintained anyway.
* README-hacking (Hacking): Specify that tabs should be avoided
where not required.

1 files changed, 686 insertions, 686 deletions

diff --git a/data/glr.c b/data/glr.c
index f22a8f10..f1394d80 100644
--- a/data/glr.c
+++ b/data/glr.c
@@ -220,7 +220,7 @@ typedef struct YYLTYPE
 ])
 
 b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]],
-	      [b4_shared_declarations])[
+              [b4_shared_declarations])[
 
 /* Enabling traces.  */
 #ifndef YYDEBUG
@@ -358,7 +358,7 @@ b4_percent_code_get[]dnl
 #define YYUNDEFTOK  ]b4_undef_token_number[
 #define YYMAXUTOK   ]b4_user_token_number_max[
 
-#define YYTRANSLATE(YYX)						\
+#define YYTRANSLATE(YYX)                                                \
   ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
 
 /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX.  */
@@ -440,32 +440,32 @@ dnl We probably ought to introduce a type for confl.
 ]b4_locations_if([[
 #define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
 #ifndef YYLLOC_DEFAULT
-# define YYLLOC_DEFAULT(Current, Rhs, N)				\
-    do									\
-      if (YYID (N))							\
-	{								\
-	  (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;	\
-	  (Current).first_column = YYRHSLOC (Rhs, 1).first_column;	\
-	  (Current).last_line    = YYRHSLOC (Rhs, N).last_line;		\
-	  (Current).last_column  = YYRHSLOC (Rhs, N).last_column;	\
-	}								\
-      else								\
-	{								\
-	  (Current).first_line   = (Current).last_line   =		\
-	    YYRHSLOC (Rhs, 0).last_line;				\
-	  (Current).first_column = (Current).last_column =		\
-	    YYRHSLOC (Rhs, 0).last_column;				\
-	}								\
+# define YYLLOC_DEFAULT(Current, Rhs, N)                                \
+    do                                                                  \
+      if (YYID (N))                                                     \
+        {                                                               \
+          (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;        \
+          (Current).first_column = YYRHSLOC (Rhs, 1).first_column;      \
+          (Current).last_line    = YYRHSLOC (Rhs, N).last_line;         \
+          (Current).last_column  = YYRHSLOC (Rhs, N).last_column;       \
+        }                                                               \
+      else                                                              \
+        {                                                               \
+          (Current).first_line   = (Current).last_line   =              \
+            YYRHSLOC (Rhs, 0).last_line;                                \
+          (Current).first_column = (Current).last_column =              \
+            YYRHSLOC (Rhs, 0).last_column;                              \
+        }                                                               \
     while (YYID (0))
 
 /* YY_LOCATION_PRINT -- Print the location on the stream.
    This macro was not mandated originally: define only if we know
    we won't break user code: when these are the locations we know.  */
 
-# define YY_LOCATION_PRINT(File, Loc)			\
-    fprintf (File, "%d.%d-%d.%d",			\
-	     (Loc).first_line, (Loc).first_column,	\
-	     (Loc).last_line,  (Loc).last_column)
+# define YY_LOCATION_PRINT(File, Loc)                   \
+    fprintf (File, "%d.%d-%d.%d",                       \
+             (Loc).first_line, (Loc).first_column,      \
+             (Loc).last_line,  (Loc).last_column)
 #endif
 ]],[
 #ifndef YYLLOC_DEFAULT
@@ -521,10 +521,10 @@ typedef enum { yyok, yyaccept, yyabort, yyerr } YYRESULTTAG;
 #  define YYFPRINTF fprintf
 # endif
 
-# define YYDPRINTF(Args)			\
-  do {						\
+# define YYDPRINTF(Args)                        \
+  do {                                          \
     if (yydebug)                                \
-      YYFPRINTF Args;				\
+      YYFPRINTF Args;                           \
   } while (YYID (0))
 
 ]b4_yy_symbol_print_generate([b4_c_ansi_function_def])[
@@ -552,7 +552,7 @@ int yydebug;
 #endif /* !YYDEBUG */
 
 /* YYINITDEPTH -- initial size of the parser's stacks.  */
-#ifndef	YYINITDEPTH
+#ifndef YYINITDEPTH
 # define YYINITDEPTH ]b4_stack_depth_init[
 #endif
 
@@ -579,16 +579,16 @@ int yydebug;
 #endif
 
 #if YYSTACKEXPANDABLE
-# define YY_RESERVE_GLRSTACK(Yystack)			\
-  do {							\
-    if (Yystack->yyspaceLeft < YYHEADROOM)		\
-      yyexpandGLRStack (Yystack);			\
+# define YY_RESERVE_GLRSTACK(Yystack)                   \
+  do {                                                  \
+    if (Yystack->yyspaceLeft < YYHEADROOM)              \
+      yyexpandGLRStack (Yystack);                       \
   } while (YYID (0))
 #else
-# define YY_RESERVE_GLRSTACK(Yystack)			\
-  do {							\
-    if (Yystack->yyspaceLeft < YYHEADROOM)		\
-      yyMemoryExhausted (Yystack);			\
+# define YY_RESERVE_GLRSTACK(Yystack)                   \
+  do {                                                  \
+    if (Yystack->yyspaceLeft < YYHEADROOM)              \
+      yyMemoryExhausted (Yystack);                      \
   } while (YYID (0))
 #endif
 
@@ -632,27 +632,27 @@ yytnamerr (char *yyres, const char *yystr)
       char const *yyp = yystr;
 
       for (;;)
-	switch (*++yyp)
-	  {
-	  case '\'':
-	  case ',':
-	    goto do_not_strip_quotes;
-
-	  case '\\':
-	    if (*++yyp != '\\')
-	      goto do_not_strip_quotes;
-	    /* Fall through.  */
-	  default:
-	    if (yyres)
-	      yyres[yyn] = *yyp;
-	    yyn++;
-	    break;
-
-	  case '"':
-	    if (yyres)
-	      yyres[yyn] = '\0';
-	    return yyn;
-	  }
+        switch (*++yyp)
+          {
+          case '\'':
+          case ',':
+            goto do_not_strip_quotes;
+
+          case '\\':
+            if (*++yyp != '\\')
+              goto do_not_strip_quotes;
+            /* Fall through.  */
+          default:
+            if (yyres)
+              yyres[yyn] = *yyp;
+            yyn++;
+            break;
+
+          case '"':
+            if (yyres)
+              yyres[yyn] = '\0';
+            return yyn;
+          }
     do_not_strip_quotes: ;
     }
 
@@ -811,11 +811,11 @@ yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)
 #endif
       yyvsp[i].yystate.yyresolved = s->yyresolved;
       if (s->yyresolved)
-	yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval;
+        yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval;
       else
-	/* The effect of using yysval or yyloc (in an immediate rule) is
+        /* The effect of using yysval or yyloc (in an immediate rule) is
          * undefined.  */
-	yyvsp[i].yystate.yysemantics.yyfirstVal = NULL;
+        yyvsp[i].yystate.yysemantics.yyfirstVal = NULL;
       yyvsp[i].yystate.yyloc = s->yyloc;
       s = yyvsp[i].yystate.yypred = s->yypred;
     }
@@ -844,10 +844,10 @@ yyfill (yyGLRStackItem *yyvsp, int *yylow, int yylow1, yybool yynormal)
  *  yyerr for YYERROR, yyabort for YYABORT.  */
 /*ARGSUSED*/ static YYRESULTTAG
 yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
-	      YYSTYPE* yyvalp,
-	      YYLTYPE* YYOPTIONAL_LOC (yylocp),
-	      yyGLRStack* yystackp
-	      ]b4_user_formals[)
+              YYSTYPE* yyvalp,
+              YYLTYPE* YYOPTIONAL_LOC (yylocp),
+              yyGLRStack* yystackp
+              ]b4_user_formals[)
 {
   yybool yynormal __attribute__ ((__unused__)) =
     (yystackp->yysplitPoint == NULL);
@@ -868,9 +868,9 @@ yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp,
 # undef YYFILL
 # define YYFILL(N) yyfill (yyvsp, &yylow, N, yynormal)
 # undef YYBACKUP
-# define YYBACKUP(Token, Value)						     \
+# define YYBACKUP(Token, Value)                                              \
   return yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")),     \
-	 yyerrok, yyerr
+         yyerrok, yyerr
 
   yylow = 1;
   if (yyrhslen == 0)
@@ -910,7 +910,7 @@ yyuserMerge (int yyn, YYSTYPE* yy0, YYSTYPE* yy1)
     }
 }
 
-			      /* Bison grammar-table manipulation.  */
+                              /* Bison grammar-table manipulation.  */
 
 ]b4_yydestruct_generate([b4_c_ansi_function_def])[
 
@@ -926,32 +926,32 @@ yydestroyGLRState (char const *yymsg, yyGLRState *yys]b4_user_formals[)
 {
   if (yys->yyresolved)
     yydestruct (yymsg, yystos[yys->yylrState],
-		&yys->yysemantics.yysval]b4_locations_if([, &yys->yyloc])[]b4_user_args[);
+                &yys->yysemantics.yysval]b4_locations_if([, &yys->yyloc])[]b4_user_args[);
   else
     {
 #if YYDEBUG
       if (yydebug)
-	{
-	  if (yys->yysemantics.yyfirstVal)
-	    YYFPRINTF (stderr, "%s unresolved ", yymsg);
-	  else
-	    YYFPRINTF (stderr, "%s incomplete ", yymsg);
-	  yy_symbol_print (stderr, yystos[yys->yylrState],
-			   NULL]b4_locations_if([, &yys->yyloc])[]b4_user_args[);
-	  YYFPRINTF (stderr, "\n");
-	}
+        {
+          if (yys->yysemantics.yyfirstVal)
+            YYFPRINTF (stderr, "%s unresolved ", yymsg);
+          else
+            YYFPRINTF (stderr, "%s incomplete ", yymsg);
+          yy_symbol_print (stderr, yystos[yys->yylrState],
+                           NULL]b4_locations_if([, &yys->yyloc])[]b4_user_args[);
+          YYFPRINTF (stderr, "\n");
+        }
 #endif
 
       if (yys->yysemantics.yyfirstVal)
-	{
-	  yySemanticOption *yyoption = yys->yysemantics.yyfirstVal;
-	  yyGLRState *yyrh;
-	  int yyn;
-	  for (yyrh = yyoption->yystate, yyn = yyrhsLength (yyoption->yyrule);
-	       yyn > 0;
-	       yyrh = yyrh->yypred, yyn -= 1)
-	    yydestroyGLRState (yymsg, yyrh]b4_user_args[);
-	}
+        {
+          yySemanticOption *yyoption = yys->yysemantics.yyfirstVal;
+          yyGLRState *yyrh;
+          int yyn;
+          for (yyrh = yyoption->yystate, yyn = yyrhsLength (yyoption->yyrule);
+               yyn > 0;
+               yyrh = yyrh->yypred, yyn -= 1)
+            yydestroyGLRState (yymsg, yyrh]b4_user_args[);
+        }
     }
 }
 
@@ -993,7 +993,7 @@ yydefaultAction (yyStateNum yystate)
  */
 static inline void
 yygetLRActions (yyStateNum yystate, int yytoken,
-		int* yyaction, const short int** yyconflicts)
+                int* yyaction, const short int** yyconflicts)
 {
   int yyindex = yypact[yystate] + yytoken;
   if (yypact_value_is_default (yypact[yystate])
@@ -1036,7 +1036,7 @@ yyisErrorAction (int yyaction)
   return yyaction == 0;
 }
 
-				/* GLRStates */
+                                /* GLRStates */
 
 /** Return a fresh GLRStackItem in YYSTACKP.  The item is an LR state
  *  if YYISSTATE, and otherwise a semantic option.  Callers should call
@@ -1059,7 +1059,7 @@ yynewGLRStackItem (yyGLRStack* yystackp, yybool yyisState)
  *  stack #YYK of *YYSTACKP. */
 static void
 yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate,
-		     yyGLRState* yyrhs, yyRuleNum yyrule)
+                     yyGLRState* yyrhs, yyRuleNum yyrule)
 {
   yySemanticOption* yynewOption =
     &yynewGLRStackItem (yystackp, yyfalse)->yyoption;
@@ -1079,7 +1079,7 @@ yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate,
   YY_RESERVE_GLRSTACK (yystackp);
 }
 
-				/* GLRStacks */
+                                /* GLRStacks */
 
 /** Initialize YYSET to a singleton set containing an empty stack.  */
 static yybool
@@ -1157,35 +1157,35 @@ yyexpandGLRStack (yyGLRStack* yystackp)
     {
       *yyp1 = *yyp0;
       if (*(yybool *) yyp0)
-	{
-	  yyGLRState* yys0 = &yyp0->yystate;
-	  yyGLRState* yys1 = &yyp1->yystate;
-	  if (yys0->yypred != NULL)
-	    yys1->yypred =
-	      YYRELOC (yyp0, yyp1, yys0->yypred, yystate);
-	  if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != NULL)
-	    yys1->yysemantics.yyfirstVal =
-	      YYRELOC(yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption);
-	}
+        {
+          yyGLRState* yys0 = &yyp0->yystate;
+          yyGLRState* yys1 = &yyp1->yystate;
+          if (yys0->yypred != NULL)
+            yys1->yypred =
+              YYRELOC (yyp0, yyp1, yys0->yypred, yystate);
+          if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != NULL)
+            yys1->yysemantics.yyfirstVal =
+              YYRELOC(yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption);
+        }
       else
-	{
-	  yySemanticOption* yyv0 = &yyp0->yyoption;
-	  yySemanticOption* yyv1 = &yyp1->yyoption;
-	  if (yyv0->yystate != NULL)
-	    yyv1->yystate = YYRELOC (yyp0, yyp1, yyv0->yystate, yystate);
-	  if (yyv0->yynext != NULL)
-	    yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption);
-	}
+        {
+          yySemanticOption* yyv0 = &yyp0->yyoption;
+          yySemanticOption* yyv1 = &yyp1->yyoption;
+          if (yyv0->yystate != NULL)
+            yyv1->yystate = YYRELOC (yyp0, yyp1, yyv0->yystate, yystate);
+          if (yyv0->yynext != NULL)
+            yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption);
+        }
     }
   if (yystackp->yysplitPoint != NULL)
     yystackp->yysplitPoint = YYRELOC (yystackp->yyitems, yynewItems,
-				 yystackp->yysplitPoint, yystate);
+                                 yystackp->yysplitPoint, yystate);
 
   for (yyn = 0; yyn < yystackp->yytops.yysize; yyn += 1)
     if (yystackp->yytops.yystates[yyn] != NULL)
       yystackp->yytops.yystates[yyn] =
-	YYRELOC (yystackp->yyitems, yynewItems,
-		 yystackp->yytops.yystates[yyn], yystate);
+        YYRELOC (yystackp->yyitems, yynewItems,
+                 yystackp->yytops.yystates[yyn], yystate);
   YYFREE (yystackp->yyitems);
   yystackp->yyitems = yynewItems;
   yystackp->yynextFree = yynewItems + yysize;
@@ -1241,30 +1241,30 @@ yyremoveDeletes (yyGLRStack* yystackp)
   while (yyj < yystackp->yytops.yysize)
     {
       if (yystackp->yytops.yystates[yyi] == NULL)
-	{
-	  if (yyi == yyj)
-	    {
-	      YYDPRINTF ((stderr, "Removing dead stacks.\n"));
-	    }
-	  yystackp->yytops.yysize -= 1;
-	}
+        {
+          if (yyi == yyj)
+            {
+              YYDPRINTF ((stderr, "Removing dead stacks.\n"));
+            }
+          yystackp->yytops.yysize -= 1;
+        }
       else
-	{
-	  yystackp->yytops.yystates[yyj] = yystackp->yytops.yystates[yyi];
-	  /* In the current implementation, it's unnecessary to copy
-	     yystackp->yytops.yylookaheadNeeds[yyi] since, after
-	     yyremoveDeletes returns, the parser immediately either enters
-	     deterministic operation or shifts a token.  However, it doesn't
-	     hurt, and the code might evolve to need it.  */
-	  yystackp->yytops.yylookaheadNeeds[yyj] =
-	    yystackp->yytops.yylookaheadNeeds[yyi];
-	  if (yyj != yyi)
-	    {
-	      YYDPRINTF ((stderr, "Rename stack %lu -> %lu.\n",
-			  (unsigned long int) yyi, (unsigned long int) yyj));
-	    }
-	  yyj += 1;
-	}
+        {
+          yystackp->yytops.yystates[yyj] = yystackp->yytops.yystates[yyi];
+          /* In the current implementation, it's unnecessary to copy
+             yystackp->yytops.yylookaheadNeeds[yyi] since, after
+             yyremoveDeletes returns, the parser immediately either enters
+             deterministic operation or shifts a token.  However, it doesn't
+             hurt, and the code might evolve to need it.  */
+          yystackp->yytops.yylookaheadNeeds[yyj] =
+            yystackp->yytops.yylookaheadNeeds[yyi];
+          if (yyj != yyi)
+            {
+              YYDPRINTF ((stderr, "Rename stack %lu -> %lu.\n",
+                          (unsigned long int) yyi, (unsigned long int) yyj));
+            }
+          yyj += 1;
+        }
       yyi += 1;
     }
 }
@@ -1274,8 +1274,8 @@ yyremoveDeletes (yyGLRStack* yystackp)
  * value *YYVALP and source location *YYLOCP.  */
 static inline void
 yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
-	    size_t yyposn,
-	    YYSTYPE* yyvalp, YYLTYPE* yylocp)
+            size_t yyposn,
+            YYSTYPE* yyvalp, YYLTYPE* yylocp)
 {
   yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate;
 
@@ -1295,7 +1295,7 @@ yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
  *  semantic value of YYRHS under the action for YYRULE.  */
 static inline void
 yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
-		 size_t yyposn, yyGLRState* yyrhs, yyRuleNum yyrule)
+                 size_t yyposn, yyGLRState* yyrhs, yyRuleNum yyrule)
 {
   yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate;
 
@@ -1313,10 +1313,10 @@ yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
 #if !YYDEBUG
 # define YY_REDUCE_PRINT(Args)
 #else
-# define YY_REDUCE_PRINT(Args)		\
-do {					\
-  if (yydebug)				\
-    yy_reduce_print Args;		\
+# define YY_REDUCE_PRINT(Args)          \
+do {                                    \
+  if (yydebug)                          \
+    yy_reduce_print Args;               \
 } while (YYID (0))
 
 /*----------------------------------------------------------------------.
@@ -1331,8 +1331,8 @@ yy_reduce_print (int yynormal, yyGLRStackItem* yyvsp, size_t yyk, yyRuleNum yyru
   int yyi;
 ]b4_parse_param_use[]dnl
 [  YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu):\n",
-	     (unsigned long int) yyk, yyrule - 1,
-	     (unsigned long int) yyrline[yyrule]);
+             (unsigned long int) yyk, yyrule - 1,
+             (unsigned long int) yyrline[yyrule]);
   if (! yynormal)
     yyfillin (yyvsp, 1, -yynrhs);
   /* The symbols being reduced.  */
@@ -1340,10 +1340,10 @@ yy_reduce_print (int yynormal, yyGLRStackItem* yyvsp, size_t yyk, yyRuleNum yyru
     {
       YYFPRINTF (stderr, "   $%d = ", yyi + 1);
       yy_symbol_print (stderr,
-		       yystos[yyvsp[yyi - yynrhs + 1].yystate.yylrState],
-		       &yyvsp[yyi - yynrhs + 1].yystate.yysemantics.yysval
-		       ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
-		       b4_user_args[);
+                       yystos[yyvsp[yyi - yynrhs + 1].yystate.yylrState],
+                       &yyvsp[yyi - yynrhs + 1].yystate.yysemantics.yysval
+                       ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
+                       b4_user_args[);
       if (!yyvsp[yyi - yynrhs + 1].yystate.yyresolved)
         YYFPRINTF (stderr, " (unresolved)");
       YYFPRINTF (stderr, "\n");
@@ -1359,7 +1359,7 @@ yy_reduce_print (int yynormal, yyGLRStackItem* yyvsp, size_t yyk, yyRuleNum yyru
  *  for userAction.  */
 static inline YYRESULTTAG
 yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
-	    YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
+            YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
 {
   int yynrhs = yyrhsLength (yyrule);
 
@@ -1373,7 +1373,7 @@ yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
       yystackp->yytops.yystates[0] = & yystackp->yynextFree[-1].yystate;
       YY_REDUCE_PRINT ((1, yyrhs, yyk, yyrule]b4_user_args[));
       return yyuserAction (yyrule, yynrhs, yyrhs,
-			   yyvalp, yylocp, yystackp]b4_user_args[);
+                           yyvalp, yylocp, yystackp]b4_user_args[);
     }
   else
     {
@@ -1381,20 +1381,20 @@ yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
       yyGLRState* yys;
       yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
       yys = yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred
-	= yystackp->yytops.yystates[yyk];]b4_locations_if([[
+        = yystackp->yytops.yystates[yyk];]b4_locations_if([[
       if (yynrhs == 0)
-	/* Set default location.  */
-	yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yys->yyloc;]])[
+        /* Set default location.  */
+        yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yys->yyloc;]])[
       for (yyi = 0; yyi < yynrhs; yyi += 1)
-	{
-	  yys = yys->yypred;
-	  YYASSERT (yys);
-	}
+        {
+          yys = yys->yypred;
+          YYASSERT (yys);
+        }
       yyupdateSplit (yystackp, yys);
       yystackp->yytops.yystates[yyk] = yys;
       YY_REDUCE_PRINT ((0, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1, yyk, yyrule]b4_user_args[));
       return yyuserAction (yyrule, yynrhs, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
-			   yyvalp, yylocp, yystackp]b4_user_args[);
+                           yyvalp, yylocp, yystackp]b4_user_args[);
     }
 }
 
@@ -1411,7 +1411,7 @@ yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
  */
 static inline YYRESULTTAG
 yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
-	     yybool yyforceEval]b4_user_formals[)
+             yybool yyforceEval]b4_user_formals[)
 {
   size_t yyposn = yystackp->yytops.yystates[yyk]->yyposn;
 
@@ -1422,19 +1422,19 @@ yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
       YYLTYPE yyloc;
 
       yyflag = yydoAction (yystackp, yyk, yyrule, &yysval,
-			   &yyloc]b4_user_args[);
+                           &yyloc]b4_user_args[);
       if (yyflag == yyerr && yystackp->yysplitPoint != NULL)
         {
-	  YYDPRINTF ((stderr, "Parse on stack %lu rejected by rule #%d.\n",
-		     (unsigned long int) yyk, yyrule - 1));
+          YYDPRINTF ((stderr, "Parse on stack %lu rejected by rule #%d.\n",
+                     (unsigned long int) yyk, yyrule - 1));
         }
       if (yyflag != yyok)
         return yyflag;
       YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyrule], &yysval, &yyloc);
       yyglrShift (yystackp, yyk,
-		  yyLRgotoState (yystackp->yytops.yystates[yyk]->yylrState,
-				 yylhsNonterm (yyrule)),
-		  yyposn, &yysval, &yyloc);
+                  yyLRgotoState (yystackp->yytops.yystates[yyk]->yylrState,
+                                 yylhsNonterm (yyrule)),
+                  yyposn, &yysval, &yyloc);
     }
   else
     {
@@ -1444,35 +1444,35 @@ yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
       yyStateNum yynewLRState;
 
       for (yys = yystackp->yytops.yystates[yyk], yyn = yyrhsLength (yyrule);
-	   0 < yyn; yyn -= 1)
-	{
-	  yys = yys->yypred;
-	  YYASSERT (yys);
-	}
+           0 < yyn; yyn -= 1)
+        {
+          yys = yys->yypred;
+          YYASSERT (yys);
+        }
       yyupdateSplit (yystackp, yys);
       yynewLRState = yyLRgotoState (yys->yylrState, yylhsNonterm (yyrule));
       YYDPRINTF ((stderr,
-		  "Reduced stack %lu by rule #%d; action deferred.  Now in state %d.\n",
-		  (unsigned long int) yyk, yyrule - 1, yynewLRState));
+                  "Reduced stack %lu by rule #%d; action deferred.  Now in state %d.\n",
+                  (unsigned long int) yyk, yyrule - 1, yynewLRState));
       for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)
-	if (yyi != yyk && yystackp->yytops.yystates[yyi] != NULL)
-	  {
-	    yyGLRState* yyp, *yysplit = yystackp->yysplitPoint;
-	    yyp = yystackp->yytops.yystates[yyi];
-	    while (yyp != yys && yyp != yysplit && yyp->yyposn >= yyposn)
-	      {
-		if (yyp->yylrState == yynewLRState && yyp->yypred == yys)
-		  {
-		    yyaddDeferredAction (yystackp, yyk, yyp, yys0, yyrule);
-		    yymarkStackDeleted (yystackp, yyk);
-		    YYDPRINTF ((stderr, "Merging stack %lu into stack %lu.\n",
-				(unsigned long int) yyk,
-				(unsigned long int) yyi));
-		    return yyok;
-		  }
-		yyp = yyp->yypred;
-	      }
-	  }
+        if (yyi != yyk && yystackp->yytops.yystates[yyi] != NULL)
+          {
+            yyGLRState* yyp, *yysplit = yystackp->yysplitPoint;
+            yyp = yystackp->yytops.yystates[yyi];
+            while (yyp != yys && yyp != yysplit && yyp->yyposn >= yyposn)
+              {
+                if (yyp->yylrState == yynewLRState && yyp->yypred == yys)
+                  {
+                    yyaddDeferredAction (yystackp, yyk, yyp, yys0, yyrule);
+                    yymarkStackDeleted (yystackp, yyk);
+                    YYDPRINTF ((stderr, "Merging stack %lu into stack %lu.\n",
+                                (unsigned long int) yyk,
+                                (unsigned long int) yyi));
+                    return yyok;
+                  }
+                yyp = yyp->yypred;
+              }
+          }
       yystackp->yytops.yystates[yyk] = yys;
       yyglrShiftDefer (yystackp, yyk, yynewLRState, yyposn, yys0, yyrule);
     }
@@ -1495,24 +1495,24 @@ yysplitStack (yyGLRStack* yystackp, size_t yyk)
       yynewStates = NULL;
 
       if (yystackp->yytops.yycapacity
-	  > (YYSIZEMAX / (2 * sizeof yynewStates[0])))
-	yyMemoryExhausted (yystackp);
+          > (YYSIZEMAX / (2 * sizeof yynewStates[0])))
+        yyMemoryExhausted (yystackp);
       yystackp->yytops.yycapacity *= 2;
 
       yynewStates =
-	(yyGLRState**) YYREALLOC (yystackp->yytops.yystates,
-				  (yystackp->yytops.yycapacity
-				   * sizeof yynewStates[0]));
+        (yyGLRState**) YYREALLOC (yystackp->yytops.yystates,
+                                  (yystackp->yytops.yycapacity
+                                   * sizeof yynewStates[0]));
       if (yynewStates == NULL)
-	yyMemoryExhausted (yystackp);
+        yyMemoryExhausted (yystackp);
       yystackp->yytops.yystates = yynewStates;
 
       yynewLookaheadNeeds =
-	(yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds,
-			     (yystackp->yytops.yycapacity
-			      * sizeof yynewLookaheadNeeds[0]));
+        (yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds,
+                             (yystackp->yytops.yycapacity
+                              * sizeof yynewLookaheadNeeds[0]));
       if (yynewLookaheadNeeds == NULL)
-	yyMemoryExhausted (yystackp);
+        yyMemoryExhausted (yystackp);
       yystackp->yytops.yylookaheadNeeds = yynewLookaheadNeeds;
     }
   yystackp->yytops.yystates[yystackp->yytops.yysize]
@@ -1534,11 +1534,11 @@ yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
       yyGLRState *yys0, *yys1;
       int yyn;
       for (yys0 = yyy0->yystate, yys1 = yyy1->yystate,
-	   yyn = yyrhsLength (yyy0->yyrule);
-	   yyn > 0;
-	   yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)
-	if (yys0->yyposn != yys1->yyposn)
-	  return yyfalse;
+           yyn = yyrhsLength (yyy0->yyrule);
+           yyn > 0;
+           yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)
+        if (yys0->yyposn != yys1->yyposn)
+          return yyfalse;
       return yytrue;
     }
   else
@@ -1558,43 +1558,43 @@ yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
        yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)
     {
       if (yys0 == yys1)
-	break;
+        break;
       else if (yys0->yyresolved)
-	{
-	  yys1->yyresolved = yytrue;
-	  yys1->yysemantics.yysval = yys0->yysemantics.yysval;
-	}
+        {
+          yys1->yyresolved = yytrue;
+          yys1->yysemantics.yysval = yys0->yysemantics.yysval;
+        }
       else if (yys1->yyresolved)
-	{
-	  yys0->yyresolved = yytrue;
-	  yys0->yysemantics.yysval = yys1->yysemantics.yysval;
-	}
+        {
+          yys0->yyresolved = yytrue;
+          yys0->yysemantics.yysval = yys1->yysemantics.yysval;
+        }
       else
-	{
-	  yySemanticOption** yyz0p;
-	  yySemanticOption* yyz1;
-	  yyz0p = &yys0->yysemantics.yyfirstVal;
-	  yyz1 = yys1->yysemantics.yyfirstVal;
-	  while (YYID (yytrue))
-	    {
-	      if (yyz1 == *yyz0p || yyz1 == NULL)
-		break;
-	      else if (*yyz0p == NULL)
-		{
-		  *yyz0p = yyz1;
-		  break;
-		}
-	      else if (*yyz0p < yyz1)
-		{
-		  yySemanticOption* yyz = *yyz0p;
-		  *yyz0p = yyz1;
-		  yyz1 = yyz1->yynext;
-		  (*yyz0p)->yynext = yyz;
-		}
-	      yyz0p = &(*yyz0p)->yynext;
-	    }
-	  yys1->yysemantics.yyfirstVal = yys0->yysemantics.yyfirstVal;
-	}
+        {
+          yySemanticOption** yyz0p;
+          yySemanticOption* yyz1;
+          yyz0p = &yys0->yysemantics.yyfirstVal;
+          yyz1 = yys1->yysemantics.yyfirstVal;
+          while (YYID (yytrue))
+            {
+              if (yyz1 == *yyz0p || yyz1 == NULL)
+                break;
+              else if (*yyz0p == NULL)
+                {
+                  *yyz0p = yyz1;
+                  break;
+                }
+              else if (*yyz0p < yyz1)
+                {
+                  yySemanticOption* yyz = *yyz0p;
+                  *yyz0p = yyz1;
+                  yyz1 = yyz1->yynext;
+                  (*yyz0p)->yynext = yyz;
+                }
+              yyz0p = &(*yyz0p)->yynext;
+            }
+          yys1->yysemantics.yyfirstVal = yys0->yysemantics.yyfirstVal;
+        }
     }
 }
 
@@ -1610,9 +1610,9 @@ yypreference (yySemanticOption* y0, yySemanticOption* y1)
   if (p0 == p1)
     {
       if (yymerger[r0] == 0 || yymerger[r0] != yymerger[r1])
-	return 0;
+        return 0;
       else
-	return 1;
+        return 1;
     }
   if (p0 == 0 || p1 == 0)
     return 0;
@@ -1624,7 +1624,7 @@ yypreference (yySemanticOption* y0, yySemanticOption* y1)
 }
 
 static YYRESULTTAG yyresolveValue (yyGLRState* yys,
-				   yyGLRStack* yystackp]b4_user_formals[);
+                                   yyGLRStack* yystackp]b4_user_formals[);
 
 
 /** Resolve the previous YYN states starting at and including state YYS
@@ -1634,14 +1634,14 @@ static YYRESULTTAG yyresolveValue (yyGLRState* yys,
  *  data so that yydestroyGLRState can be invoked if necessary.  */
 static YYRESULTTAG
 yyresolveStates (yyGLRState* yys, int yyn,
-		 yyGLRStack* yystackp]b4_user_formals[)
+                 yyGLRStack* yystackp]b4_user_formals[)
 {
   if (0 < yyn)
     {
       YYASSERT (yys->yypred);
       YYCHK (yyresolveStates (yys->yypred, yyn-1, yystackp]b4_user_args[));
       if (! yys->yyresolved)
-	YYCHK (yyresolveValue (yys, yystackp]b4_user_args[));
+        YYCHK (yyresolveValue (yys, yystackp]b4_user_args[));
     }
   return yyok;
 }
@@ -1653,7 +1653,7 @@ yyresolveStates (yyGLRState* yys, int yyn,
  *  semantic values if invoked).  */
 static YYRESULTTAG
 yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystackp,
-		 YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
+                 YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[)
 {
   yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
   int yynrhs;
@@ -1668,7 +1668,7 @@ yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystackp,
     {
       yyGLRState *yys;
       for (yys = yyopt->yystate; yynrhs > 0; yys = yys->yypred, yynrhs -= 1)
-	yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
+        yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
       return yyflag;
     }
 
@@ -1683,8 +1683,8 @@ yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystackp,
   yylval = yyopt->yyval;
   yylloc = yyopt->yyloc;
   yyflag = yyuserAction (yyopt->yyrule, yynrhs,
-			   yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
-			   yyvalp, yylocp, yystackp]b4_user_args[);
+                           yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
+                           yyvalp, yylocp, yystackp]b4_user_args[);
   yychar = yychar_current;
   yylval = yylval_current;
   yylloc = yylloc_current;
@@ -1713,35 +1713,35 @@ yyreportTree (yySemanticOption* yyx, int yyindent)
 
   if (yyx->yystate->yyposn < yys->yyposn + 1)
     YYFPRINTF (stderr, "%*s%s -> <Rule %d, empty>\n",
-	       yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
-	       yyx->yyrule - 1);
+               yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
+               yyx->yyrule - 1);
   else
     YYFPRINTF (stderr, "%*s%s -> <Rule %d, tokens %lu .. %lu>\n",
-	       yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
-	       yyx->yyrule - 1, (unsigned long int) (yys->yyposn + 1),
-	       (unsigned long int) yyx->yystate->yyposn);
+               yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
+               yyx->yyrule - 1, (unsigned long int) (yys->yyposn + 1),
+               (unsigned long int) yyx->yystate->yyposn);
   for (yyi = 1; yyi <= yynrhs; yyi += 1)
     {
       if (yystates[yyi]->yyresolved)
-	{
-	  if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn)
-	    YYFPRINTF (stderr, "%*s%s <empty>\n", yyindent+2, "",
-		       yytokenName (yystos[yystates[yyi-1]->yylrState]));
-	  else
-	    YYFPRINTF (stderr, "%*s%s <tokens %lu .. %lu>\n", yyindent+2, "",
-		       yytokenName (yystos[yystates[yyi-1]->yylrState]),
-		       (unsigned long int) (yystates[yyi-1]->yyposn + 1),
-		       (unsigned long int) yystates[yyi]->yyposn);
-	}
+        {
+          if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn)
+            YYFPRINTF (stderr, "%*s%s <empty>\n", yyindent+2, "",
+                       yytokenName (yystos[yystates[yyi-1]->yylrState]));
+          else
+            YYFPRINTF (stderr, "%*s%s <tokens %lu .. %lu>\n", yyindent+2, "",
+                       yytokenName (yystos[yystates[yyi-1]->yylrState]),
+                       (unsigned long int) (yystates[yyi-1]->yyposn + 1),
+                       (unsigned long int) yystates[yyi]->yyposn);
+        }
       else
-	yyreportTree (yystates[yyi]->yysemantics.yyfirstVal, yyindent+2);
+        yyreportTree (yystates[yyi]->yysemantics.yyfirstVal, yyindent+2);
     }
 }
 #endif
 
 /*ARGSUSED*/ static YYRESULTTAG
 yyreportAmbiguity (yySemanticOption* yyx0,
-		   yySemanticOption* yyx1]b4_pure_formals[)
+                   yySemanticOption* yyx1]b4_pure_formals[)
 {
   YYUSE (yyx0);
   YYUSE (yyx1);
@@ -1764,56 +1764,56 @@ yyreportAmbiguity (yySemanticOption* yyx0,
  *  The first semantic option of a state is always chosen.  */
 static void
 yyresolveLocations (yyGLRState* yys1, int yyn1,
-		    yyGLRStack *yystackp]b4_user_formals[)
+                    yyGLRStack *yystackp]b4_user_formals[)
 {
   if (0 < yyn1)
     {
       yyresolveLocations (yys1->yypred, yyn1 - 1, yystackp]b4_user_args[);
       if (!yys1->yyresolved)
-	{
-	  yySemanticOption *yyoption;
-	  yyGLRStackItem yyrhsloc[1 + YYMAXRHS];
-	  int yynrhs;
-	  int yychar_current;
-	  YYSTYPE yylval_current;
-	  YYLTYPE yylloc_current;
-	  yyoption = yys1->yysemantics.yyfirstVal;
-	  YYASSERT (yyoption != NULL);
-	  yynrhs = yyrhsLength (yyoption->yyrule);
-	  if (yynrhs > 0)
-	    {
-	      yyGLRState *yys;
-	      int yyn;
-	      yyresolveLocations (yyoption->yystate, yynrhs,
-				  yystackp]b4_user_args[);
-	      for (yys = yyoption->yystate, yyn = yynrhs;
-		   yyn > 0;
-		   yys = yys->yypred, yyn -= 1)
-		yyrhsloc[yyn].yystate.yyloc = yys->yyloc;
-	    }
-	  else
-	    {
-	      /* Both yyresolveAction and yyresolveLocations traverse the GSS
-		 in reverse rightmost order.  It is only necessary to invoke
-		 yyresolveLocations on a subforest for which yyresolveAction
-		 would have been invoked next had an ambiguity not been
-		 detected.  Thus the location of the previous state (but not
-		 necessarily the previous state itself) is guaranteed to be
-		 resolved already.  */
-	      yyGLRState *yyprevious = yyoption->yystate;
-	      yyrhsloc[0].yystate.yyloc = yyprevious->yyloc;
-	    }
-	  yychar_current = yychar;
-	  yylval_current = yylval;
-	  yylloc_current = yylloc;
-	  yychar = yyoption->yyrawchar;
-	  yylval = yyoption->yyval;
-	  yylloc = yyoption->yyloc;
-	  YYLLOC_DEFAULT ((yys1->yyloc), yyrhsloc, yynrhs);
-	  yychar = yychar_current;
-	  yylval = yylval_current;
-	  yylloc = yylloc_current;
-	}
+        {
+          yySemanticOption *yyoption;
+          yyGLRStackItem yyrhsloc[1 + YYMAXRHS];
+          int yynrhs;
+          int yychar_current;
+          YYSTYPE yylval_current;
+          YYLTYPE yylloc_current;
+          yyoption = yys1->yysemantics.yyfirstVal;
+          YYASSERT (yyoption != NULL);
+          yynrhs = yyrhsLength (yyoption->yyrule);
+          if (yynrhs > 0)
+            {
+              yyGLRState *yys;
+              int yyn;
+              yyresolveLocations (yyoption->yystate, yynrhs,
+                                  yystackp]b4_user_args[);
+              for (yys = yyoption->yystate, yyn = yynrhs;
+                   yyn > 0;
+                   yys = yys->yypred, yyn -= 1)
+                yyrhsloc[yyn].yystate.yyloc = yys->yyloc;
+            }
+          else
+            {
+              /* Both yyresolveAction and yyresolveLocations traverse the GSS
+                 in reverse rightmost order.  It is only necessary to invoke
+                 yyresolveLocations on a subforest for which yyresolveAction
+                 would have been invoked next had an ambiguity not been
+                 detected.  Thus the location of the previous state (but not
+                 necessarily the previous state itself) is guaranteed to be
+                 resolved already.  */
+              yyGLRState *yyprevious = yyoption->yystate;
+              yyrhsloc[0].yystate.yyloc = yyprevious->yyloc;
+            }
+          yychar_current = yychar;
+          yylval_current = yylval;
+          yylloc_current = yylloc;
+          yychar = yyoption->yyrawchar;
+          yylval = yyoption->yyval;
+          yylloc = yyoption->yyloc;
+          YYLLOC_DEFAULT ((yys1->yyloc), yyrhsloc, yynrhs);
+          yychar = yychar_current;
+          yylval = yylval_current;
+          yylloc = yylloc_current;
+        }
     }
 }]])[
 
@@ -1842,35 +1842,35 @@ yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)
       yySemanticOption* yyp = *yypp;
 
       if (yyidenticalOptions (yybest, yyp))
-	{
-	  yymergeOptionSets (yybest, yyp);
-	  *yypp = yyp->yynext;
-	}
+        {
+          yymergeOptionSets (yybest, yyp);
+          *yypp = yyp->yynext;
+        }
       else
-	{
-	  switch (yypreference (yybest, yyp))
-	    {
-	    case 0:]b4_locations_if([[
-	      yyresolveLocations (yys, 1, yystackp]b4_user_args[);]])[
-	      return yyreportAmbiguity (yybest, yyp]b4_pure_args[);
-	      break;
-	    case 1:
-	      yymerge = yytrue;
-	      break;
-	    case 2:
-	      break;
-	    case 3:
-	      yybest = yyp;
-	      yymerge = yyfalse;
-	      break;
-	    default:
-	      /* This cannot happen so it is not worth a YYASSERT (yyfalse),
-		 but some compilers complain if the default case is
-		 omitted.  */
-	      break;
-	    }
-	  yypp = &yyp->yynext;
-	}
+        {
+          switch (yypreference (yybest, yyp))
+            {
+            case 0:]b4_locations_if([[
+              yyresolveLocations (yys, 1, yystackp]b4_user_args[);]])[
+              return yyreportAmbiguity (yybest, yyp]b4_pure_args[);
+              break;
+            case 1:
+              yymerge = yytrue;
+              break;
+            case 2:
+              break;
+            case 3:
+              yybest = yyp;
+              yymerge = yyfalse;
+              break;
+            default:
+              /* This cannot happen so it is not worth a YYASSERT (yyfalse),
+                 but some compilers complain if the default case is
+                 omitted.  */
+              break;
+            }
+          yypp = &yyp->yynext;
+        }
     }
 
   if (yymerge)
@@ -1878,26 +1878,26 @@ yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)
       yySemanticOption* yyp;
       int yyprec = yydprec[yybest->yyrule];
       yyflag = yyresolveAction (yybest, yystackp, &yysval,
-				yylocp]b4_user_args[);
+                                yylocp]b4_user_args[);
       if (yyflag == yyok)
-	for (yyp = yybest->yynext; yyp != NULL; yyp = yyp->yynext)
-	  {
-	    if (yyprec == yydprec[yyp->yyrule])
-	      {
-		YYSTYPE yysval_other;
-		YYLTYPE yydummy;
-		yyflag = yyresolveAction (yyp, yystackp, &yysval_other,
-					  &yydummy]b4_user_args[);
-		if (yyflag != yyok)
-		  {
-		    yydestruct ("Cleanup: discarding incompletely merged value for",
-				yystos[yys->yylrState],
-				&yysval]b4_locations_if([, yylocp])[]b4_user_args[);
-		    break;
-		  }
-		yyuserMerge (yymerger[yyp->yyrule], &yysval, &yysval_other);
-	      }
-	  }
+        for (yyp = yybest->yynext; yyp != NULL; yyp = yyp->yynext)
+          {
+            if (yyprec == yydprec[yyp->yyrule])
+              {
+                YYSTYPE yysval_other;
+                YYLTYPE yydummy;
+                yyflag = yyresolveAction (yyp, yystackp, &yysval_other,
+                                          &yydummy]b4_user_args[);
+                if (yyflag != yyok)
+                  {
+                    yydestruct ("Cleanup: discarding incompletely merged value for",
+                                yystos[yys->yylrState],
+                                &yysval]b4_locations_if([, yylocp])[]b4_user_args[);
+                    break;
+                  }
+                yyuserMerge (yymerger[yyp->yyrule], &yysval, &yysval_other);
+              }
+          }
     }
   else
     yyflag = yyresolveAction (yybest, yystackp, &yysval, yylocp]b4_user_args[);
@@ -1921,11 +1921,11 @@ yyresolveStack (yyGLRStack* yystackp]b4_user_formals[)
       int yyn;
 
       for (yyn = 0, yys = yystackp->yytops.yystates[0];
-	   yys != yystackp->yysplitPoint;
-	   yys = yys->yypred, yyn += 1)
-	continue;
+           yys != yystackp->yysplitPoint;
+           yys = yys->yypred, yyn += 1)
+        continue;
       YYCHK (yyresolveStates (yystackp->yytops.yystates[0], yyn, yystackp
-			     ]b4_user_args[));
+                             ]b4_user_args[));
     }
   return yyok;
 }
@@ -1962,112 +1962,112 @@ yycompressStack (yyGLRStack* yystackp)
 
 static YYRESULTTAG
 yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
-		   size_t yyposn]b4_pure_formals[)
+                   size_t yyposn]b4_pure_formals[)
 {
   while (yystackp->yytops.yystates[yyk] != NULL)
     {
       yyStateNum yystate = yystackp->yytops.yystates[yyk]->yylrState;
       YYDPRINTF ((stderr, "Stack %lu Entering state %d\n",
-		  (unsigned long int) yyk, yystate));
+                  (unsigned long int) yyk, yystate));
 
       YYASSERT (yystate != YYFINAL);
 
       if (yyisDefaultedState (yystate))
-	{
+        {
           YYRESULTTAG yyflag;
           yyRuleNum yyrule = yydefaultAction (yystate);
-	  if (yyrule == 0)
-	    {
-	      YYDPRINTF ((stderr, "Stack %lu dies.\n",
-			  (unsigned long int) yyk));
-	      yymarkStackDeleted (yystackp, yyk);
-	      return yyok;
-	    }
-	  yyflag = yyglrReduce (yystackp, yyk, yyrule, yyimmediate[yyrule]]b4_user_args[);
+          if (yyrule == 0)
+            {
+              YYDPRINTF ((stderr, "Stack %lu dies.\n",
+                          (unsigned long int) yyk));
+              yymarkStackDeleted (yystackp, yyk);
+              return yyok;
+            }
+          yyflag = yyglrReduce (yystackp, yyk, yyrule, yyimmediate[yyrule]]b4_user_args[);
           if (yyflag == yyerr)
             {
-	      YYDPRINTF ((stderr, "Stack %lu dies (predicate failure or explicit user error).\n",
-			  (unsigned long int) yyk));
-	      yymarkStackDeleted (yystackp, yyk);
-	      return yyok;
-	    }
-	  if (yyflag != yyok)
+              YYDPRINTF ((stderr, "Stack %lu dies (predicate failure or explicit user error).\n",
+                          (unsigned long int) yyk));
+              yymarkStackDeleted (yystackp, yyk);
+              return yyok;
+            }
+          if (yyflag != yyok)
             return yyflag;
-	}
+        }
       else
-	{
-	  yySymbol yytoken;
+        {
+          yySymbol yytoken;
           int yyaction;
           const short int* yyconflicts;
 
-	  yystackp->yytops.yylookaheadNeeds[yyk] = yytrue;
-	  if (yychar == YYEMPTY)
-	    {
-	      YYDPRINTF ((stderr, "Reading a token: "));
-	      yychar = YYLEX;
-	    }
-
-	  if (yychar <= YYEOF)
-	    {
-	      yychar = yytoken = YYEOF;
-	      YYDPRINTF ((stderr, "Now at end of input.\n"));
-	    }
-	  else
-	    {
-	      yytoken = YYTRANSLATE (yychar);
-	      YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
-	    }
-
-	  yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
-
-	  while (*yyconflicts != 0)
-	    {
-	      YYRESULTTAG yyflag;
-	      size_t yynewStack = yysplitStack (yystackp, yyk);
-	      YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n",
-			  (unsigned long int) yynewStack,
-			  (unsigned long int) yyk));
-	      yyflag = yyglrReduce (yystackp, yynewStack,
-				    *yyconflicts,
-				    yyimmediate[*yyconflicts]]b4_user_args[);
+          yystackp->yytops.yylookaheadNeeds[yyk] = yytrue;
+          if (yychar == YYEMPTY)
+            {
+              YYDPRINTF ((stderr, "Reading a token: "));
+              yychar = YYLEX;
+            }
+
+          if (yychar <= YYEOF)
+            {
+              yychar = yytoken = YYEOF;
+              YYDPRINTF ((stderr, "Now at end of input.\n"));
+            }
+          else
+            {
+              yytoken = YYTRANSLATE (yychar);
+              YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+            }
+
+          yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
+
+          while (*yyconflicts != 0)
+            {
+              YYRESULTTAG yyflag;
+              size_t yynewStack = yysplitStack (yystackp, yyk);
+              YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n",
+                          (unsigned long int) yynewStack,
+                          (unsigned long int) yyk));
+              yyflag = yyglrReduce (yystackp, yynewStack,
+                                    *yyconflicts,
+                                    yyimmediate[*yyconflicts]]b4_user_args[);
               if (yyflag == yyok)
-	        YYCHK (yyprocessOneStack (yystackp, yynewStack,
-					  yyposn]b4_pure_args[));
-	      else if (yyflag == yyerr)
-		{
-		  YYDPRINTF ((stderr, "Stack %lu dies.\n",
-			      (unsigned long int) yynewStack));
-		  yymarkStackDeleted (yystackp, yynewStack);
-		}
-	      else
-		return yyflag;
-	      yyconflicts += 1;
-	    }
-
-	  if (yyisShiftAction (yyaction))
-	    break;
-	  else if (yyisErrorAction (yyaction))
-	    {
-	      YYDPRINTF ((stderr, "Stack %lu dies.\n",
-			  (unsigned long int) yyk));
-	      yymarkStackDeleted (yystackp, yyk);
-	      break;
-	    }
-	  else
+                YYCHK (yyprocessOneStack (yystackp, yynewStack,
+                                          yyposn]b4_pure_args[));
+              else if (yyflag == yyerr)
+                {
+                  YYDPRINTF ((stderr, "Stack %lu dies.\n",
+                              (unsigned long int) yynewStack));
+                  yymarkStackDeleted (yystackp, yynewStack);
+                }
+              else
+                return yyflag;
+              yyconflicts += 1;
+            }
+
+          if (yyisShiftAction (yyaction))
+            break;
+          else if (yyisErrorAction (yyaction))
             {
-	      YYRESULTTAG yyflag = yyglrReduce (yystackp, yyk, -yyaction,
+              YYDPRINTF ((stderr, "Stack %lu dies.\n",
+                          (unsigned long int) yyk));
+              yymarkStackDeleted (yystackp, yyk);
+              break;
+            }
+          else
+            {
+              YYRESULTTAG yyflag = yyglrReduce (yystackp, yyk, -yyaction,
                                                 yyimmediate[-yyaction]]b4_user_args[);
-	      if (yyflag == yyerr)
+              if (yyflag == yyerr)
                 {
-	          YYDPRINTF ((stderr, "Stack %lu dies (predicate failure or explicit user error).\n",
-			      (unsigned long int) yyk));
-	          yymarkStackDeleted (yystackp, yyk);
+                  YYDPRINTF ((stderr, "Stack %lu dies (predicate failure or explicit user error).\n",
+                              (unsigned long int) yyk));
+                  yymarkStackDeleted (yystackp, yyk);
                   break;
-		}
-	      else if (yyflag != yyok)
+                }
+              else if (yyflag != yyok)
                 return yyflag;
             }
-	}
+        }
     }
   return yyok;
 }
@@ -2215,45 +2215,45 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
        reductions.  Skip tokens until we can proceed.  */
     while (YYID (yytrue))
       {
-	yySymbol yytoken;
-	if (yychar == YYEOF)
-	  yyFail (yystackp][]b4_lpure_args[, NULL);
-	if (yychar != YYEMPTY)
-	  {]b4_locations_if([[
-	    /* We throw away the lookahead, but the error range
-	       of the shifted error token must take it into account.  */
-	    yyGLRState *yys = yystackp->yytops.yystates[0];
-	    yyGLRStackItem yyerror_range[3];
-	    yyerror_range[1].yystate.yyloc = yys->yyloc;
-	    yyerror_range[2].yystate.yyloc = yylloc;
-	    YYLLOC_DEFAULT ((yys->yyloc), yyerror_range, 2);]])[
-	    yytoken = YYTRANSLATE (yychar);
-	    yydestruct ("Error: discarding",
-			yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
-	  }
-	YYDPRINTF ((stderr, "Reading a token: "));
-	yychar = YYLEX;
-	if (yychar <= YYEOF)
-	  {
-	    yychar = yytoken = YYEOF;
-	    YYDPRINTF ((stderr, "Now at end of input.\n"));
-	  }
-	else
-	  {
-	    yytoken = YYTRANSLATE (yychar);
-	    YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
-	  }
-	yyj = yypact[yystackp->yytops.yystates[0]->yylrState];
-	if (yypact_value_is_default (yyj))
-	  return;
-	yyj += yytoken;
-	if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != yytoken)
-	  {
-	    if (yydefact[yystackp->yytops.yystates[0]->yylrState] != 0)
-	      return;
-	  }
-	else if (! yytable_value_is_error (yytable[yyj]))
-	  return;
+        yySymbol yytoken;
+        if (yychar == YYEOF)
+          yyFail (yystackp][]b4_lpure_args[, NULL);
+        if (yychar != YYEMPTY)
+          {]b4_locations_if([[
+            /* We throw away the lookahead, but the error range
+               of the shifted error token must take it into account.  */
+            yyGLRState *yys = yystackp->yytops.yystates[0];
+            yyGLRStackItem yyerror_range[3];
+            yyerror_range[1].yystate.yyloc = yys->yyloc;
+            yyerror_range[2].yystate.yyloc = yylloc;
+            YYLLOC_DEFAULT ((yys->yyloc), yyerror_range, 2);]])[
+            yytoken = YYTRANSLATE (yychar);
+            yydestruct ("Error: discarding",
+                        yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
+          }
+        YYDPRINTF ((stderr, "Reading a token: "));
+        yychar = YYLEX;
+        if (yychar <= YYEOF)
+          {
+            yychar = yytoken = YYEOF;
+            YYDPRINTF ((stderr, "Now at end of input.\n"));
+          }
+        else
+          {
+            yytoken = YYTRANSLATE (yychar);
+            YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+          }
+        yyj = yypact[yystackp->yytops.yystates[0]->yylrState];
+        if (yypact_value_is_default (yyj))
+          return;
+        yyj += yytoken;
+        if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != yytoken)
+          {
+            if (yydefact[yystackp->yytops.yystates[0]->yylrState] != 0)
+              return;
+          }
+        else if (! yytable_value_is_error (yytable[yyj]))
+          return;
       }
 
   /* Reduce to one stack.  */
@@ -2274,26 +2274,26 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
       yyGLRState *yys = yystackp->yytops.yystates[0];
       yyj = yypact[yys->yylrState];
       if (! yypact_value_is_default (yyj))
-	{
-	  yyj += YYTERROR;
-	  if (0 <= yyj && yyj <= YYLAST && yycheck[yyj] == YYTERROR
-	      && yyisShiftAction (yytable[yyj]))
-	    {
-	      /* Shift the error token having adjusted its location.  */
-	      YYLTYPE yyerrloc;]b4_locations_if([[
-	      yystackp->yyerror_range[2].yystate.yyloc = yylloc;
-	      YYLLOC_DEFAULT (yyerrloc, (yystackp->yyerror_range), 2);]])[
-	      YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]],
-			       &yylval, &yyerrloc);
-	      yyglrShift (yystackp, 0, yytable[yyj],
-			  yys->yyposn, &yylval, &yyerrloc);
-	      yys = yystackp->yytops.yystates[0];
-	      break;
-	    }
-	}
+        {
+          yyj += YYTERROR;
+          if (0 <= yyj && yyj <= YYLAST && yycheck[yyj] == YYTERROR
+              && yyisShiftAction (yytable[yyj]))
+            {
+              /* Shift the error token having adjusted its location.  */
+              YYLTYPE yyerrloc;]b4_locations_if([[
+              yystackp->yyerror_range[2].yystate.yyloc = yylloc;
+              YYLLOC_DEFAULT (yyerrloc, (yystackp->yyerror_range), 2);]])[
+              YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]],
+                               &yylval, &yyerrloc);
+              yyglrShift (yystackp, 0, yytable[yyj],
+                          yys->yyposn, &yylval, &yyerrloc);
+              yys = yystackp->yytops.yystates[0];
+              break;
+            }
+        }
 ]b4_locations_if([[      yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
       if (yys->yypred != NULL)
-	yydestroyGLRState ("Error: popping", yys]b4_user_args[);
+        yydestroyGLRState ("Error: popping", yys]b4_user_args[);
       yystackp->yytops.yystates[0] = yys->yypred;
       yystackp->yynextFree -= 1;
       yystackp->yyspaceLeft += 1;
@@ -2302,20 +2302,20 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
     yyFail (yystackp][]b4_lpure_args[, NULL);
 }
 
-#define YYCHK1(YYE)							     \
-  do {									     \
-    switch (YYE) {							     \
-    case yyok:								     \
-      break;								     \
-    case yyabort:							     \
-      goto yyabortlab;							     \
-    case yyaccept:							     \
-      goto yyacceptlab;							     \
-    case yyerr:								     \
-      goto yyuser_error;						     \
-    default:								     \
-      goto yybuglab;							     \
-    }									     \
+#define YYCHK1(YYE)                                                          \
+  do {                                                                       \
+    switch (YYE) {                                                           \
+    case yyok:                                                               \
+      break;                                                                 \
+    case yyabort:                                                            \
+      goto yyabortlab;                                                       \
+    case yyaccept:                                                           \
+      goto yyacceptlab;                                                      \
+    case yyerr:                                                              \
+      goto yyuser_error;                                                     \
+    default:                                                                 \
+      goto yybuglab;                                                         \
+    }                                                                        \
   } while (YYID (0))
 
 /*----------.
@@ -2362,148 +2362,148 @@ m4_popdef([b4_at_dollar])])dnl
   while (YYID (yytrue))
     {
       /* For efficiency, we have two loops, the first of which is
-	 specialized to deterministic operation (single stack, no
-	 potential ambiguity).  */
+         specialized to deterministic operation (single stack, no
+         potential ambiguity).  */
       /* Standard mode */
       while (YYID (yytrue))
-	{
-	  yyRuleNum yyrule;
-	  int yyaction;
-	  const short int* yyconflicts;
-
-	  yyStateNum yystate = yystack.yytops.yystates[0]->yylrState;
-	  YYDPRINTF ((stderr, "Entering state %d\n", yystate));
-	  if (yystate == YYFINAL)
-	    goto yyacceptlab;
-	  if (yyisDefaultedState (yystate))
-	    {
-	      yyrule = yydefaultAction (yystate);
-	      if (yyrule == 0)
-		{
-]b4_locations_if([[		  yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
-		  yyreportSyntaxError (&yystack]b4_user_args[);
-		  goto yyuser_error;
-		}
-	      YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue]b4_user_args[));
-	    }
-	  else
-	    {
-	      yySymbol yytoken;
-	      if (yychar == YYEMPTY)
-		{
-		  YYDPRINTF ((stderr, "Reading a token: "));
-		  yychar = YYLEX;
-		}
-
-	      if (yychar <= YYEOF)
-		{
-		  yychar = yytoken = YYEOF;
-		  YYDPRINTF ((stderr, "Now at end of input.\n"));
-		}
-	      else
-		{
-		  yytoken = YYTRANSLATE (yychar);
-		  YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
-		}
-
-	      yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
-	      if (*yyconflicts != 0)
-		break;
-	      if (yyisShiftAction (yyaction))
-		{
-		  YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
-		  yychar = YYEMPTY;
-		  yyposn += 1;
-		  yyglrShift (&yystack, 0, yyaction, yyposn, &yylval, &yylloc);
-		  if (0 < yystack.yyerrState)
-		    yystack.yyerrState -= 1;
-		}
-	      else if (yyisErrorAction (yyaction))
-		{
-]b4_locations_if([[		  yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
-		  yyreportSyntaxError (&yystack]b4_user_args[);
-		  goto yyuser_error;
-		}
-	      else
-		YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue]b4_user_args[));
-	    }
-	}
+        {
+          yyRuleNum yyrule;
+          int yyaction;
+          const short int* yyconflicts;
+
+          yyStateNum yystate = yystack.yytops.yystates[0]->yylrState;
+          YYDPRINTF ((stderr, "Entering state %d\n", yystate));
+          if (yystate == YYFINAL)
+            goto yyacceptlab;
+          if (yyisDefaultedState (yystate))
+            {
+              yyrule = yydefaultAction (yystate);
+              if (yyrule == 0)
+                {
+]b4_locations_if([[               yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+                  yyreportSyntaxError (&yystack]b4_user_args[);
+                  goto yyuser_error;
+                }
+              YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue]b4_user_args[));
+            }
+          else
+            {
+              yySymbol yytoken;
+              if (yychar == YYEMPTY)
+                {
+                  YYDPRINTF ((stderr, "Reading a token: "));
+                  yychar = YYLEX;
+                }
+
+              if (yychar <= YYEOF)
+                {
+                  yychar = yytoken = YYEOF;
+                  YYDPRINTF ((stderr, "Now at end of input.\n"));
+                }
+              else
+                {
+                  yytoken = YYTRANSLATE (yychar);
+                  YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+                }
+
+              yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
+              if (*yyconflicts != 0)
+                break;
+              if (yyisShiftAction (yyaction))
+                {
+                  YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
+                  yychar = YYEMPTY;
+                  yyposn += 1;
+                  yyglrShift (&yystack, 0, yyaction, yyposn, &yylval, &yylloc);
+                  if (0 < yystack.yyerrState)
+                    yystack.yyerrState -= 1;
+                }
+              else if (yyisErrorAction (yyaction))
+                {
+]b4_locations_if([[               yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+                  yyreportSyntaxError (&yystack]b4_user_args[);
+                  goto yyuser_error;
+                }
+              else
+                YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue]b4_user_args[));
+            }
+        }
 
       while (YYID (yytrue))
-	{
-	  yySymbol yytoken_to_shift;
-	  size_t yys;
-
-	  for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
-	    yystackp->yytops.yylookaheadNeeds[yys] = yychar != YYEMPTY;
-
-	  /* yyprocessOneStack returns one of three things:
-
-	      - An error flag.  If the caller is yyprocessOneStack, it
-		immediately returns as well.  When the caller is finally
-		yyparse, it jumps to an error label via YYCHK1.
-
-	      - yyok, but yyprocessOneStack has invoked yymarkStackDeleted
-		(&yystack, yys), which sets the top state of yys to NULL.  Thus,
-		yyparse's following invocation of yyremoveDeletes will remove
-		the stack.
-
-	      - yyok, when ready to shift a token.
-
-	     Except in the first case, yyparse will invoke yyremoveDeletes and
-	     then shift the next token onto all remaining stacks.  This
-	     synchronization of the shift (that is, after all preceding
-	     reductions on all stacks) helps prevent double destructor calls
-	     on yylval in the event of memory exhaustion.  */
-
-	  for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
-	    YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn]b4_lpure_args[));
-	  yyremoveDeletes (&yystack);
-	  if (yystack.yytops.yysize == 0)
-	    {
-	      yyundeleteLastStack (&yystack);
-	      if (yystack.yytops.yysize == 0)
-		yyFail (&yystack][]b4_lpure_args[, YY_("syntax error"));
-	      YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
-	      YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
-]b4_locations_if([[	      yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
-	      yyreportSyntaxError (&yystack]b4_user_args[);
-	      goto yyuser_error;
-	    }
-
-	  /* If any yyglrShift call fails, it will fail after shifting.  Thus,
-	     a copy of yylval will already be on stack 0 in the event of a
-	     failure in the following loop.  Thus, yychar is set to YYEMPTY
-	     before the loop to make sure the user destructor for yylval isn't
-	     called twice.  */
-	  yytoken_to_shift = YYTRANSLATE (yychar);
-	  yychar = YYEMPTY;
-	  yyposn += 1;
-	  for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
-	    {
-	      int yyaction;
-	      const short int* yyconflicts;
-	      yyStateNum yystate = yystack.yytops.yystates[yys]->yylrState;
-	      yygetLRActions (yystate, yytoken_to_shift, &yyaction,
-			      &yyconflicts);
-	      /* Note that yyconflicts were handled by yyprocessOneStack.  */
-	      YYDPRINTF ((stderr, "On stack %lu, ", (unsigned long int) yys));
-	      YY_SYMBOL_PRINT ("shifting", yytoken_to_shift, &yylval, &yylloc);
-	      yyglrShift (&yystack, yys, yyaction, yyposn,
-			  &yylval, &yylloc);
-	      YYDPRINTF ((stderr, "Stack %lu now in state #%d\n",
-			  (unsigned long int) yys,
-			  yystack.yytops.yystates[yys]->yylrState));
-	    }
-
-	  if (yystack.yytops.yysize == 1)
-	    {
-	      YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
-	      YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
-	      yycompressStack (&yystack);
-	      break;
-	    }
-	}
+        {
+          yySymbol yytoken_to_shift;
+          size_t yys;
+
+          for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
+            yystackp->yytops.yylookaheadNeeds[yys] = yychar != YYEMPTY;
+
+          /* yyprocessOneStack returns one of three things:
+
+              - An error flag.  If the caller is yyprocessOneStack, it
+                immediately returns as well.  When the caller is finally
+                yyparse, it jumps to an error label via YYCHK1.
+
+              - yyok, but yyprocessOneStack has invoked yymarkStackDeleted
+                (&yystack, yys), which sets the top state of yys to NULL.  Thus,
+                yyparse's following invocation of yyremoveDeletes will remove
+                the stack.
+
+              - yyok, when ready to shift a token.
+
+             Except in the first case, yyparse will invoke yyremoveDeletes and
+             then shift the next token onto all remaining stacks.  This
+             synchronization of the shift (that is, after all preceding
+             reductions on all stacks) helps prevent double destructor calls
+             on yylval in the event of memory exhaustion.  */
+
+          for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
+            YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn]b4_lpure_args[));
+          yyremoveDeletes (&yystack);
+          if (yystack.yytops.yysize == 0)
+            {
+              yyundeleteLastStack (&yystack);
+              if (yystack.yytops.yysize == 0)
+                yyFail (&yystack][]b4_lpure_args[, YY_("syntax error"));
+              YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
+              YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
+]b4_locations_if([[           yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
+              yyreportSyntaxError (&yystack]b4_user_args[);
+              goto yyuser_error;
+            }
+
+          /* If any yyglrShift call fails, it will fail after shifting.  Thus,
+             a copy of yylval will already be on stack 0 in the event of a
+             failure in the following loop.  Thus, yychar is set to YYEMPTY
+             before the loop to make sure the user destructor for yylval isn't
+             called twice.  */
+          yytoken_to_shift = YYTRANSLATE (yychar);
+          yychar = YYEMPTY;
+          yyposn += 1;
+          for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
+            {
+              int yyaction;
+              const short int* yyconflicts;
+              yyStateNum yystate = yystack.yytops.yystates[yys]->yylrState;
+              yygetLRActions (yystate, yytoken_to_shift, &yyaction,
+                              &yyconflicts);
+              /* Note that yyconflicts were handled by yyprocessOneStack.  */
+              YYDPRINTF ((stderr, "On stack %lu, ", (unsigned long int) yys));
+              YY_SYMBOL_PRINT ("shifting", yytoken_to_shift, &yylval, &yylloc);
+              yyglrShift (&yystack, yys, yyaction, yyposn,
+                          &yylval, &yylloc);
+              YYDPRINTF ((stderr, "Stack %lu now in state #%d\n",
+                          (unsigned long int) yys,
+                          yystack.yytops.yystates[yys]->yylrState));
+            }
+
+          if (yystack.yytops.yysize == 1)
+            {
+              YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
+              YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
+              yycompressStack (&yystack);
+              break;
+            }
+        }
       continue;
     yyuser_error:
       yyrecoverSyntaxError (&yystack]b4_user_args[);
@@ -2530,8 +2530,8 @@ m4_popdef([b4_at_dollar])])dnl
  yyreturn:
   if (yychar != YYEMPTY)
     yydestruct ("Cleanup: discarding lookahead",
-		YYTRANSLATE (yychar),
-		&yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
+                YYTRANSLATE (yychar),
+                &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
 
   /* If the stack is well-formed, pop the stack until it is empty,
      destroying its entries as we go.  But free the stack regardless
@@ -2540,25 +2540,25 @@ m4_popdef([b4_at_dollar])])dnl
     {
       yyGLRState** yystates = yystack.yytops.yystates;
       if (yystates)
-	{
-	  size_t yysize = yystack.yytops.yysize;
-	  size_t yyk;
-	  for (yyk = 0; yyk < yysize; yyk += 1)
-	    if (yystates[yyk])
-	      {
-		while (yystates[yyk])
-		  {
-		    yyGLRState *yys = yystates[yyk];
-]b4_locations_if([[		    yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
-)[		    if (yys->yypred != NULL)
-		      yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
-		    yystates[yyk] = yys->yypred;
-		    yystack.yynextFree -= 1;
-		    yystack.yyspaceLeft += 1;
-		  }
-		break;
-	      }
-	}
+        {
+          size_t yysize = yystack.yytops.yysize;
+          size_t yyk;
+          for (yyk = 0; yyk < yysize; yyk += 1)
+            if (yystates[yyk])
+              {
+                while (yystates[yyk])
+                  {
+                    yyGLRState *yys = yystates[yyk];
+]b4_locations_if([[                 yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
+)[                  if (yys->yypred != NULL)
+                      yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
+                    yystates[yyk] = yys->yypred;
+                    yystack.yynextFree -= 1;
+                    yystack.yyspaceLeft += 1;
+                  }
+                break;
+              }
+        }
       yyfreeGLRStack (&yystack);
     }
 
@@ -2600,7 +2600,7 @@ yypstack (yyGLRStack* yystackp, size_t yyk)
   yypstates (yystackp->yytops.yystates[yyk]);
 }
 
-#define YYINDEX(YYX)							     \
+#define YYINDEX(YYX)                                                         \
     ((YYX) == NULL ? -1 : (yyGLRStackItem*) (YYX) - yystackp->yyitems)
 
 
@@ -2614,29 +2614,29 @@ yypdumpstack (yyGLRStack* yystackp)
       YYFPRINTF (stderr, "%3lu. ",
                  (unsigned long int) (yyp - yystackp->yyitems));
       if (*(yybool *) yyp)
-	{
-	  YYFPRINTF (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
-		     yyp->yystate.yyresolved, yyp->yystate.yylrState,
-		     (unsigned long int) yyp->yystate.yyposn,
-		     (long int) YYINDEX (yyp->yystate.yypred));
-	  if (! yyp->yystate.yyresolved)
-	    YYFPRINTF (stderr, ", firstVal: %ld",
-		       (long int) YYINDEX (yyp->yystate
+        {
+          YYFPRINTF (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
+                     yyp->yystate.yyresolved, yyp->yystate.yylrState,
+                     (unsigned long int) yyp->yystate.yyposn,
+                     (long int) YYINDEX (yyp->yystate.yypred));
+          if (! yyp->yystate.yyresolved)
+            YYFPRINTF (stderr, ", firstVal: %ld",
+                       (long int) YYINDEX (yyp->yystate
                                              .yysemantics.yyfirstVal));
-	}
+        }
       else
-	{
-	  YYFPRINTF (stderr, "Option. rule: %d, state: %ld, next: %ld",
-		     yyp->yyoption.yyrule - 1,
-		     (long int) YYINDEX (yyp->yyoption.yystate),
-		     (long int) YYINDEX (yyp->yyoption.yynext));
-	}
+        {
+          YYFPRINTF (stderr, "Option. rule: %d, state: %ld, next: %ld",
+                     yyp->yyoption.yyrule - 1,
+                     (long int) YYINDEX (yyp->yyoption.yystate),
+                     (long int) YYINDEX (yyp->yyoption.yynext));
+        }
       YYFPRINTF (stderr, "\n");
     }
   YYFPRINTF (stderr, "Tops:");
   for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)
     YYFPRINTF (stderr, "%lu: %ld; ", (unsigned long int) yyi,
-	       (long int) YYINDEX (yystackp->yytops.yystates[yyi]));
+               (long int) YYINDEX (yystackp->yytops.yystates[yyi]));
   YYFPRINTF (stderr, "\n");
 }
 #endif