X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/34f98f46ee16dd3719d19e002dc27b2665a2514f..ee5abb379bc118339852b742fea1ca1c8fce7706:/data/lalr1.cc

diff --git a/data/lalr1.cc b/data/lalr1.cc
index 6de35817..c76a1a10 100644
--- a/data/lalr1.cc
+++ b/data/lalr1.cc
@@ -33,7 +33,7 @@ m4_include(b4_pkgdatadir/[location.cc])
 m4_changecom()
 m4_divert(0)dnl
 b4_defines_if(
-[@output @output_header_name@
+[@output b4_spec_defines_file
 b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++],
   [2002, 2003, 2004, 2005, 2006])
 dnl FIXME: This is wrong, we want computed header guards.
@@ -43,6 +43,10 @@ dnl FIXME: This is wrong, we want computed header guards.
 #ifndef PARSER_HEADER_H
 # define PARSER_HEADER_H
 
+]m4_ifdef([b4_requires],
+[[/* Copy the %requires blocks.  */
+]b4_user_requires])[
+
 #include <string>
 #include <iostream>
 #include "stack.hh"
@@ -53,15 +57,7 @@ namespace ]b4_namespace[
   class location;
 }
 
-]m4_ifdef([b4_start_header],
-[[/* Copy the %start-header blocks.  */
-]b4_start_header])[]dnl
-
-[/* Line __line__ of lalr1.cc.  */
-]b4_syncline([@oline@], [@ofile@])[
-
-]dnl Include location.hh here: it might depend on headers included above.
-[#include "location.hh"
+#include "location.hh"
 
 /* Enabling traces.  */
 #ifndef YYDEBUG
@@ -111,11 +107,11 @@ namespace ]b4_namespace[
 #ifndef YYSTYPE
 ]m4_ifdef([b4_stype],
 [    union semantic_type
-b4_stype
-/* Line __line__ of lalr1.cc.  */
-b4_syncline([@oline@], [@ofile@])
+b4_user_stype
 	;],
-[    typedef int semantic_type;])[
+[m4_if(b4_tag_seen_flag, 0,
+[[    typedef int semantic_type;]],
+[[    typedef YYSTYPE semantic_type;]])])[
 #else
     typedef YYSTYPE semantic_type;
 #endif
@@ -176,7 +172,7 @@ b4_error_verbose_if([, int tok])[);
     virtual void yy_symbol_print_ (int yytype,
 				   const semantic_type* yyvaluep,
 				   const location_type* yylocationp);
-#endif /* ! YYDEBUG */
+#endif
 
 
     /// State numbers.
@@ -253,6 +249,10 @@ b4_error_verbose_if([, int tok])[);
     virtual void yy_reduce_print_ (int r);
     /// Print the state stack on the debug stream.
     virtual void yystack_print_ ();
+
+    /* Debugging.  */
+    int yydebug_;
+    std::ostream* yycdebug_;
 #endif
 
     /// Convert a scanner token number \a t to a symbol number.
@@ -283,11 +283,6 @@ b4_error_verbose_if([, int tok])[);
     static const int yyntokens_;
     static const unsigned int yyuser_token_number_max_;
     static const token_number_type yyundef_token_;
-
-    /* Debugging.  */
-    int yydebug_;
-    std::ostream* yycdebug_;
-
 ]b4_parse_param_vars[
   };
 }
@@ -300,13 +295,13 @@ b4_error_verbose_if([, int tok])[);
 # define YYSTYPE b4_namespace::b4_parser_class_name::semantic_type
 #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
 
 [#endif /* ! defined PARSER_HEADER_H */]
 ])dnl
-@output @output_parser_name@
+@output b4_parser_file_name
 b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++],
   [2002, 2003, 2004, 2005, 2006])
 m4_if(b4_prefix, [yy], [],
@@ -315,16 +310,13 @@ m4_if(b4_prefix, [yy], [],
 #define yylex   b4_prefix[]lex])[
 
 /* First part of user declarations.  */
-]b4_pre_prologue
+]b4_user_pre_prologue
 
-b4_defines_if([
-#include @output_header_name@])[
+b4_defines_if([[
+#include "@basename(]b4_spec_defines_file[@)"]])[
 
 /* User implementation prologue.  */
-]b4_post_prologue[
-
-]/* Line __line__ of lalr1.cc.  */
-b4_syncline([@oline@], [@ofile@])[
+]b4_user_post_prologue[
 
 #ifndef YY_
 # if YYENABLE_NLS
@@ -341,14 +333,12 @@ b4_syncline([@oline@], [@ofile@])[
 /* Suppress unused-variable warnings by "using" E.  */
 #define YYUSE(e) ((void) (e))
 
-/* A pseudo ostream that takes yydebug_ into account.  */
-# define YYCDEBUG							\
-  for (bool yydebugcond_ = yydebug_; yydebugcond_; yydebugcond_ = false)	\
-    (*yycdebug_)
-
 /* Enable debugging if requested.  */
 #if YYDEBUG
 
+/* A pseudo ostream that takes yydebug_ into account.  */
+# define YYCDEBUG if (yydebug_) (*yycdebug_)
+
 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)	\
 do {							\
   if (yydebug_)						\
@@ -373,6 +363,7 @@ do {					\
 
 #else /* !YYDEBUG */
 
+# define YYCDEBUG if (false) std::cerr
 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
 # define YY_REDUCE_PRINT(Rule)
 # define YY_STACK_PRINT()
@@ -427,9 +418,12 @@ namespace ]b4_namespace[
 #endif
 
   /// Build a parser object.
-  ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)
-    : yydebug_ (false),
-      yycdebug_ (&std::cerr)]b4_parse_param_cons[
+  ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [
+    :])[
+#if YYDEBUG
+    ]m4_ifset([b4_parse_param], [  ], [ :])[yydebug_ (false),
+      yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[
+#endif]b4_parse_param_cons[
   {
   }
 
@@ -467,7 +461,7 @@ namespace ]b4_namespace[
     yy_symbol_value_print_ (yytype, yyvaluep, yylocationp);
     *yycdebug_ << ')';
   }
-#endif /* ! YYDEBUG */
+#endif
 
   void
   ]b4_parser_class_name[::yydestruct_ (const char* yymsg,
@@ -495,6 +489,7 @@ namespace ]b4_namespace[
     yylocation_stack_.pop (n);
   }
 
+#if YYDEBUG
   std::ostream&
   ]b4_parser_class_name[::debug_stream () const
   {
@@ -519,7 +514,7 @@ namespace ]b4_namespace[
   {
     yydebug_ = l;
   }
-
+#endif
 
   int
   ]b4_parser_class_name[::parse ()
@@ -557,11 +552,9 @@ namespace ]b4_namespace[
 m4_pushdef([b4_at_dollar],     [yylloc])dnl
 m4_pushdef([b4_dollar_dollar], [yylval])dnl
     /* User initialization code.  */
-    b4_initial_action
+    b4_user_initial_action
 m4_popdef([b4_dollar_dollar])dnl
-m4_popdef([b4_at_dollar])dnl
-  /* Line __line__ of yacc.c.  */
-b4_syncline([@oline@], [@ofile@])])dnl
+m4_popdef([b4_at_dollar])])dnl
 
   [  /* Initialize the stacks.  The initial state will be pushed in
        yynewstate, since the latter expects the semantical and the
@@ -577,6 +570,11 @@ b4_syncline([@oline@], [@ofile@])])dnl
   yynewstate:
     yystate_stack_.push (yystate);
     YYCDEBUG << "Entering state " << yystate << std::endl;
+
+    /* Accept?  */
+    if (yystate == yyfinal_)
+      goto yyacceptlab;
+
     goto yybackup;
 
     /* Backup.  */
@@ -626,16 +624,11 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))[;
 	goto yyreduce;
       }
 
-    /* Accept?  */
-    if (yyn == yyfinal_)
-      goto yyacceptlab;
-
     /* Shift the lookahead token.  */
     YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
 
-    /* Discard the token being shifted unless it is eof.  */
-    if (yychar != yyeof_)
-      yychar = yyempty_;
+    /* Discard the token being shifted.  */
+    yychar = yyempty_;
 
     yysemantic_stack_.push (yylval);
     yylocation_stack_.push (yylloc);
@@ -680,9 +673,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))[;
     YY_REDUCE_PRINT (yyn);
     switch (yyn)
       {
-	]b4_actions
-    /* Line __line__ of lalr1.cc.  */
-b4_syncline([@oline@], [@ofile@])[
+	]b4_user_actions[
 	default: break;
       }
     YY_SYMBOL_PRINT ("-> $$ =", yyr1_[yyn], &yyval, &yyloc);
@@ -792,9 +783,6 @@ b4_error_verbose_if([, yytoken])[));
 	YY_STACK_PRINT ();
       }
 
-    if (yyn == yyfinal_)
-      goto yyacceptlab;
-
     yyerror_range[1] = yylloc;
     // Using YYLLOC is tempting, but would change the location of
     // the lookahead.  YYLOC is available though.
@@ -820,7 +808,7 @@ b4_error_verbose_if([, yytoken])[));
     goto yyreturn;
 
   yyreturn:
-    if (yychar != yyeof_ && yychar != yyempty_)
+    if (yychar != yyempty_)
       yydestruct_ ("Cleanup: discarding lookahead", yytoken, &yylval, &yylloc);
 
     /* Do not reclaim the symbols of the rule which action triggered