Avoid warnings from gcc -Wundef y.tab.c.

[bison.git] / data / lalr1.cc

diff --git a/data/lalr1.cc b/data/lalr1.cc
index 603786e574060aa1b95508efe773efefa3bed339..c36ba3dea7457149167fabfdb79c1cedb1ef3e7a 100644 (file)
--- a/data/lalr1.cc
+++ b/data/lalr1.cc
@@ -1,6 +1,6 @@
 # C++ skeleton for Bison
 
-# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
 # Free Software Foundation, Inc.
 
 # This program is free software: you can redistribute it and/or modify
@@ -35,7 +35,7 @@ m4_divert_push(0)dnl
 b4_defines_if(
 [@output(b4_spec_defines_file@)@
 b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++],
-             [2002, 2003, 2004, 2005, 2006, 2007, 2008])
+             [2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009])
 dnl FIXME: This is wrong, we want computed header guards.
 [
 /* C++ LALR(1) parser skeleton written by Akim Demaille.  */
@@ -190,6 +190,14 @@ b4_error_verbose_if([, int tok])[);
     /// The location stack.
     location_stack_type yylocation_stack_;
 
+    /// Whether the given \c yypact_ value indicates a defaulted state.
+    /// \param yyvalue   the value to check
+    static bool yy_pact_value_is_default_ (int yyvalue);
+
+    /// Whether the given \c yytable_ value indicates a syntax error.
+    /// \param yyvalue   the value to check
+    static bool yy_table_value_is_error_ (int yyvalue);
+
     /// Internal symbol numbers.
     typedef ]b4_int_type_for([b4_translate])[ token_number_type;
     /* Tables.  */
@@ -197,7 +205,7 @@ b4_error_verbose_if([, int tok])[);
     static const ]b4_int_type_for([b4_pact])[ yypact_[];
     static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_;
 
-    /// For a state, default rule to reduce.
+    /// For a state, default reduction number.
     /// Unless\a  yytable_ specifies something else to do.
     /// Zero means the default is an error.
     static const ]b4_int_type_for([b4_defact])[ yydefact_[];
@@ -300,7 +308,7 @@ b4_percent_code_get([[provides]])[]dnl
 ])dnl
 @output(b4_parser_file_name@)@
 b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++],
-             [2002, 2003, 2004, 2005, 2006, 2007, 2008])
+             [2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009])
 b4_percent_code_get([[top]])[]dnl
 m4_if(b4_prefix, [yy], [],
 [
@@ -318,7 +326,7 @@ b4_defines_if([[
 b4_percent_code_get[]dnl
 
 [#ifndef YY_
-# if YYENABLE_NLS
+# if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS
 #   include <libintl.h> /* FIXME: INFRINGES ON USER NAME SPACE */
 #   define YY_(msgid) dgettext ("bison-runtime", msgid)
@@ -518,6 +526,18 @@ do {                                       \
   }
 #endif
 
+  inline bool
+  ]b4_parser_class_name[::yy_pact_value_is_default_ (int yyvalue)
+  {
+    return yyvalue == yypact_ninf_;
+  }
+
+  inline bool
+  ]b4_parser_class_name[::yy_table_value_is_error_ (int yyvalue)
+  {
+    return yyvalue == yytable_ninf_;
+  }
+
   int
   ]b4_parser_class_name[::parse ()
   {
@@ -584,7 +604,7 @@ m4_popdef([b4_at_dollar])])dnl
 
     /* Try to take a decision without lookahead.  */
     yyn = yypact_[yystate];
-    if (yyn == yypact_ninf_)
+    if (yy_pact_value_is_default_ (yyn))
       goto yydefault;
 
     /* Read a lookahead token.  */
@@ -620,8 +640,8 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))[;
     yyn = yytable_[yyn];
     if (yyn <= 0)
       {
-       if (yyn == 0 || yyn == yytable_ninf_)
-       goto yyerrlab;
+       if (yy_table_value_is_error_ (yyn))
+         goto yyerrlab;
        yyn = -yyn;
        goto yyreduce;
       }
@@ -762,7 +782,7 @@ b4_error_verbose_if([, yytoken])[));
     for (;;)
       {
        yyn = yypact_[yystate];
-       if (yyn != yypact_ninf_)
+       if (!yy_pact_value_is_default_ (yyn))
        {
          yyn += yyterror_;
          if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_)
@@ -841,7 +861,8 @@ b4_error_verbose_if([, int tok])[)
     if (yypact_ninf_ < yyn && yyn <= yylast_)
       {
        /* Start YYX at -YYN if negative to avoid negative indexes in
-          YYCHECK.  */
+          YYCHECK.  In other words, skip the first -YYN actions for this
+          state because they are default actions.  */
        int yyxbegin = yyn < 0 ? -yyn : 0;
 
        /* Stay within bounds of both yycheck and yytname.  */
@@ -849,7 +870,8 @@ b4_error_verbose_if([, int tok])[)
        int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
        int count = 0;
        for (int x = yyxbegin; x < yyxend; ++x)
-         if (yycheck_[x + yyn] == x && x != yyterror_)
+         if (yycheck_[x + yyn] == x && x != yyterror_
+             && !yy_table_value_is_error_ (yytable_[x + yyn]))
            ++count;
 
        // FIXME: This method of building the message is not compatible
@@ -866,7 +888,8 @@ b4_error_verbose_if([, int tok])[)
          {
            count = 0;
            for (int x = yyxbegin; x < yyxend; ++x)
-             if (yycheck_[x + yyn] == x && x != yyterror_)
+             if (yycheck_[x + yyn] == x && x != yyterror_
+                 && !yy_table_value_is_error_ (yytable_[x + yyn]))
                {
                  res += (!count++) ? ", expecting " : " or ";
                  res += yytnamerr_ (yytname_[x]);
@@ -889,9 +912,9 @@ b4_error_verbose_if([, int tok])[)
     ]b4_pact[
   };
 
-  /* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE
-     doesn't specify something else to do.  Zero means the default is an
-     error.  */
+  /* YYDEFACT[S] -- default reduction number in state S.  Performed when
+     YYTABLE doesn't specify something else to do.  Zero means the
+     default is an error.  */
   const ]b4_int_type_for([b4_defact])[
   ]b4_parser_class_name[::yydefact_[] =
   {
@@ -914,7 +937,7 @@ b4_error_verbose_if([, int tok])[)
 
   /* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
      positive, shift that token.  If negative, reduce the rule which
-     number is the opposite.  If zero, do what YYDEFACT says.  */
+     number is the opposite.  If YYTABLE_NINF_, syntax error.  */
   const ]b4_int_type(b4_table_ninf, b4_table_ninf) b4_parser_class_name::yytable_ninf_ = b4_table_ninf[;
   const ]b4_int_type_for([b4_table])[
   ]b4_parser_class_name[::yytable_[] =
@@ -1057,7 +1080,7 @@ b4_error_verbose_if([, int tok])[)
 dnl
 @output(b4_dir_prefix[]stack.hh@)@
 b4_copyright([Stack handling for Bison parsers in C++],
-             [2002, 2003, 2004, 2005, 2006, 2007, 2008])[
+             [2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009])[
 
 #ifndef BISON_STACK_HH
 # define BISON_STACK_HH