Warn about output files that are generated by the skeletons and that

[bison.git] / data / yacc.c

diff --git a/data/yacc.c b/data/yacc.c
index 2b1cadbaec710e05b45f93ba1dc23dbb38d82906..c7146e4b1b5101e1756673e91ae143e4b5682784 100644 (file)
--- a/data/yacc.c
+++ b/data/yacc.c
@@ -161,7 +161,7 @@ m4_if(b4_prefix, [yy], [],
 b4_locations_if([#define yylloc b4_prefix[]lloc])])[
 
 /* Copy the first part of user declarations.  */
-]b4_pre_prologue[
+]b4_user_pre_prologue[
 
 /* Enabling traces.  */
 #ifndef YYDEBUG
@@ -181,21 +181,23 @@ b4_locations_if([#define yylloc b4_prefix[]lloc])])[
 # define YYTOKEN_TABLE ]b4_token_table[
 #endif
 
-]m4_ifdef([b4_start_header],
-[[/* Copy the %start-header blocks.  */
-]b4_start_header])[]dnl
+]m4_ifdef([b4_requires],
+[[/* Copy the %requires blocks.  */
+]b4_user_requires])[]dnl
 
 b4_token_enums_defines(b4_tokens)[
 
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 ]m4_ifdef([b4_stype],
-[[typedef union ]b4_union_name
-b4_user_stype
-       YYSTYPE;],
-[typedef int YYSTYPE;])[
+[[typedef union ]b4_union_name[
+]b4_user_stype[
+       YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1]],
+[m4_if(b4_tag_seen_flag, 0,
+[[typedef int YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1]])])[
 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
 # define YYSTYPE_IS_DECLARED 1
-# define YYSTYPE_IS_TRIVIAL 1
 #endif
 
 ]b4_locations_if([#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
@@ -211,9 +213,9 @@ typedef struct YYLTYPE
 # define YYLTYPE_IS_TRIVIAL 1
 #endif])
 
-m4_ifdef([b4_end_header],
-[[/* Copy the %end-header blocks.  */
-]b4_end_header])[]dnl
+m4_ifdef([b4_provides],
+[[/* Copy the %provides blocks.  */
+]b4_user_provides])[]dnl
 
 [/* Copy the second part of user declarations.  */
 ]b4_user_post_prologue[
@@ -286,9 +288,9 @@ typedef short int yytype_int16;
 #ifndef lint
 # define YYID(n) (n)
 #else
-]b4_c_function_def([YYID], [static int], [[int i], [i]])[
+]b4_c_function_def([YYID], [static int], [[int yyi], [yyi]])[
 {
-  return i;
+  return yyi;
 }
 #endif
 
@@ -673,12 +675,15 @@ do {                                                                        \
 `------------------------------------------------------------------*/
 
 ]b4_c_function_def([yy_stack_print], [static void],
-                  [[yytype_int16 *bottom], [bottom]],
-                  [[yytype_int16 *top],    [top]])[
+                  [[yytype_int16 *yybottom], [yybottom]],
+                  [[yytype_int16 *yytop],    [yytop]])[
 {
   YYFPRINTF (stderr, "Stack now");
-  for (; bottom <= top; ++bottom)
-    YYFPRINTF (stderr, " %d", *bottom);
+  for (; yybottom <= yytop; yybottom++)
+    {
+      int yybot = *yybottom;
+      YYFPRINTF (stderr, " %d", yybot);
+    }
   YYFPRINTF (stderr, "\n");
 }
 
@@ -1159,6 +1164,9 @@ m4_ifdef([b4_at_dollar_used], [[  yylsp[0] = yylloc;
 
   YYDPRINTF ((stderr, "Entering state %d\n", yystate));
 
+  if (yystate == YYFINAL)
+    YYACCEPT;
+
   goto yybackup;
 
 /*-----------.
@@ -1208,9 +1216,6 @@ yybackup:
       goto yyreduce;
     }
 
-  if (yyn == YYFINAL)
-    YYACCEPT;
-
   /* Count tokens shifted since error; after three, turn off error
      status.  */
   if (yyerrstatus)
@@ -1219,9 +1224,8 @@ yybackup:
   /* Shift the lookahead token.  */
   YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
 
-  /* Discard the shifted token unless it is eof.  */
-  if (yychar != YYEOF)
-    yychar = YYEMPTY;
+  /* Discard the shifted token.  */
+  yychar = YYEMPTY;
 
   yystate = yyn;
   *++yyvsp = yylval;
@@ -1413,9 +1417,6 @@ yyerrlab1:
       YY_STACK_PRINT (yyss, yyssp);
     }
 
-  if (yyn == YYFINAL)
-    YYACCEPT;
-
   *++yyvsp = yylval;
 ]b4_locations_if([[
   yyerror_range[1] = yylloc;
@@ -1456,7 +1457,7 @@ yyexhaustedlab:
 #endif
 
 yyreturn:
-  if (yychar != YYEOF && yychar != YYEMPTY)
+  if (yychar != YYEMPTY)
      yydestruct ("Cleanup: discarding lookahead",
                 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
   /* Do not reclaim the symbols of the rule which action triggered
@@ -1488,21 +1489,23 @@ b4_defines_if(
 b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],dnl '
   [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])
 
-m4_ifdef([b4_start_header],
-[[/* Copy the %start-header blocks.  */
-]b4_start_header])[]dnl
+m4_ifdef([b4_requires],
+[[/* Copy the %requires blocks.  */
+]b4_user_requires])[]dnl
 
 b4_token_enums_defines(b4_tokens)
 
 [#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 ]m4_ifdef([b4_stype],
-[[typedef union ]b4_union_name
-b4_user_stype
-       YYSTYPE;],
-[typedef int YYSTYPE;])[
+[[typedef union ]b4_union_name[
+]b4_user_stype[
+       YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1]],
+[m4_if(b4_tag_seen_flag, 0,
+[[typedef int YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1]])])[
 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
 # define YYSTYPE_IS_DECLARED 1
-# define YYSTYPE_IS_TRIVIAL 1
 #endif
 
 ]b4_pure_if([],
@@ -1526,7 +1529,7 @@ typedef struct YYLTYPE
           [extern YYLTYPE b4_prefix[]lloc;])
 )dnl b4_locations_if
 
-m4_ifdef([b4_end_header],
-[[/* Copy the %end-header blocks.  */
-]b4_end_header])[]dnl
+m4_ifdef([b4_provides],
+[[/* Copy the %provides blocks.  */
+]b4_user_provides])[]
 ])dnl b4_defines_if