* data/yacc.c (yyparse): Pacify non-GCC compilers about yyerrorlab

[bison.git] / data / yacc.c

diff --git a/data/yacc.c b/data/yacc.c
index a5fb4e6965da1a34caded589783022bcd909e62a..bd2d2c28918f9c6034657959db3d55069cd55e1c 100644 (file)
--- a/data/yacc.c
+++ b/data/yacc.c
@@ -1,7 +1,8 @@
 m4_divert(-1)                                                       -*- C -*-
 
 # Yacc compatible skeleton for Bison
-# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004
+
+# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005
 # Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
@@ -93,7 +94,7 @@ m4_define([b4_int_type],
 # --------------------
 # Expansion of $<TYPE>$.
 m4_define([b4_lhs_value],
-[yyval[]m4_ifval([$1], [.$1])])
+[(yyval[]m4_ifval([$1], [.$1]))])
 
 
 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
@@ -101,7 +102,7 @@ m4_define([b4_lhs_value],
 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
 # symbols on RHS.
 m4_define([b4_rhs_value],
-[yyvsp@{m4_eval([$2 - $1])@}m4_ifval([$3], [.$3])])
+[(yyvsp@{m4_eval([$2 - $1])@}m4_ifval([$3], [.$3]))])
 
 
 
@@ -113,7 +114,7 @@ m4_define([b4_rhs_value],
 # -----------------
 # Expansion of @$.
 m4_define([b4_lhs_location],
-[yyloc])
+[(yyloc)])
 
 
 # b4_rhs_location(RULE-LENGTH, NUM)
@@ -121,7 +122,7 @@ m4_define([b4_lhs_location],
 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
 # on RHS.
 m4_define([b4_rhs_location],
-[yylsp@{m4_eval([$2 - $1])@}])
+[(yylsp@{m4_eval([$2 - $1])@})])
 
 
 
@@ -153,8 +154,7 @@ b4_copyright([Skeleton parser for Yacc-like parsing with Bison],
 
 ]b4_identification
 m4_if(b4_prefix[], [yy], [],
-[/* If NAME_PREFIX is specified substitute the variables and functions
-   names.  */
+[/* Substitute the variable and function names.  */
 #define yyparse b4_prefix[]parse
 #define yylex   b4_prefix[]lex
 #define yyerror b4_prefix[]error
@@ -227,14 +227,10 @@ b4_syncline([@oline@], [@ofile@])[
 
 # ifdef YYSTACK_USE_ALLOCA
 #  if YYSTACK_USE_ALLOCA
-#   define YYSTACK_ALLOC alloca
-#  endif
-# else
-#  if defined (alloca) || defined (_ALLOCA_H)
-#   define YYSTACK_ALLOC alloca
-#  else
 #   ifdef __GNUC__
 #    define YYSTACK_ALLOC __builtin_alloca
+#   else
+#    define YYSTACK_ALLOC alloca
 #   endif
 #  endif
 # endif
@@ -506,14 +502,29 @@ while (0)
 #define YYERRCODE      256
 
 
-/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].  */
+/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
+   If N is 0, then set CURRENT to the empty location which ends
+   the previous symbol: RHS[0] (always defined).  */
 
+#define YYRHSLOC(Rhs, K) ((Rhs)[K])
 #ifndef YYLLOC_DEFAULT
-# define YYLLOC_DEFAULT(Current, Rhs, N)               \
-   ((Current).first_line   = (Rhs)[1].first_line,      \
-    (Current).first_column = (Rhs)[1].first_column,    \
-    (Current).last_line    = (Rhs)[N].last_line,       \
-    (Current).last_column  = (Rhs)[N].last_column)
+# define YYLLOC_DEFAULT(Current, Rhs, N)                               \
+    do                                                                 \
+      if (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 (0)
 #endif
 
 
@@ -527,9 +538,9 @@ while (0)
      fprintf (File, "%d.%d-%d.%d",                     \
               (Loc).first_line, (Loc).first_column,    \
               (Loc).last_line,  (Loc).last_column)
+# else
+#  define YY_LOCATION_PRINT(File, Loc) ((void) 0)
 # endif
-#else
-# define YY_LOCATION_PRINT(File, Loc) ((void) 0)
 #endif
 
 
@@ -634,10 +645,6 @@ int yydebug;
    SIZE_MAX < YYSTACK_BYTES (YYMAXDEPTH)
    evaluated with infinite-precision integer arithmetic.  */
 
-#if defined (YYMAXDEPTH) && YYMAXDEPTH == 0
-# undef YYMAXDEPTH
-#endif
-
 #ifndef YYMAXDEPTH
 # define YYMAXDEPTH ]b4_stack_depth_max[
 #endif
@@ -1021,10 +1028,7 @@ yyreduce:
 
 ]b4_location_if(
 [[  /* Default location. */
-  if (yylen)
-    YYLLOC_DEFAULT (yyloc, yylsp - yylen, yylen);
-  else
-    yyloc = yylsp[0];]])[
+  YYLLOC_DEFAULT (yyloc, yylsp - yylen, yylen);]])[
   YY_REDUCE_PRINT (yyn);
   switch (yyn)
     ]{
@@ -1167,12 +1171,11 @@ yyerrlab:
 `---------------------------------------------------*/
 yyerrorlab:
 
-#ifdef __GNUC__
-  /* Pacify GCC when the user code never invokes YYERROR and the label
-     yyerrorlab therefore never appears in user code.  */
+  /* Pacify compilers like GCC when the user code never invokes
+     YYERROR and the label yyerrorlab therefore never appears in user
+     code.  */
   if (0)
      goto yyerrorlab;
-#endif
 
 ]b4_location_if([[  yyerror_range[0] = yylsp[1-yylen];
   yylsp -= yylen;