Document last checkin a bit better.

[bison.git] / data / glr.c

diff --git a/data/glr.c b/data/glr.c
index 7c3d998d29aadbf89b82638d1831a5f01d8d99dc..37ba588cc3fa2259f649f5255836919775e681fd 100644 (file)
--- a/data/glr.c
+++ b/data/glr.c
@@ -21,6 +21,9 @@ m4_divert(-1)                                                       -*- C -*-
 
 m4_include(b4_pkgdatadir/[c.m4])
 
+b4_push_if([
+m4_fatal([Non-deterministic push parsers are not yet supported])])
+
 ## ---------------- ##
 ## Default values.  ##
 ## ---------------- ##
@@ -142,7 +145,7 @@ m4_define([b4_rhs_location],
 # We do want M4 expansion after # for CPP macros.
 m4_changecom()
 m4_divert(0)dnl
-@output @output_parser_name@
+@output b4_parser_file_name
 b4_copyright([Skeleton implementation for Bison GLR parsers in C],
   [2002, 2003, 2004, 2005, 2006])
 [
@@ -162,16 +165,16 @@ m4_if(b4_prefix, [yy], [],
 #define yylloc  b4_prefix[]lloc])[
 
 /* Copy the first part of user declarations.  */
-]b4_pre_prologue
+]b4_user_pre_prologue
 
 dnl # b4_shared_declarations
 dnl # ----------------------
 dnl # Declaration that might either go into the header (if --defines)
 dnl # or open coded in the parser body.
 m4_define([b4_shared_declarations],
-[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(b4_tokens)
 
@@ -202,12 +205,12 @@ 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
 ])
 
-b4_defines_if([#include @output_header_name@],
+b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]],
              [b4_shared_declarations])[
 
 /* Enabling traces.  */
@@ -241,7 +244,6 @@ static YYSTYPE yyval_default;
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <stdarg.h>
 
 #ifndef YY_
 # if YYENABLE_NLS
@@ -346,8 +348,7 @@ static YYSTYPE yyval_default;
 #define YYMAXUTOK   ]b4_user_token_number_max[
 
 #define YYTRANSLATE(YYX)                                               \
-  ((YYX <= 0) ? YYEOF :                                                        \
-   (unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
+  ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
 
 /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX.  */
 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
@@ -2040,11 +2041,19 @@ yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
            {
              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);
            }
-         else
-           yytoken = YYTRANSLATE (yychar);
+
          yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
 
          while (*yyconflicts != 0)
@@ -2210,8 +2219,16 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
          }
        YYDPRINTF ((stderr, "Reading a token: "));
        yychar = YYLEX;
-       yytoken = YYTRANSLATE (yychar);
-       YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+       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 (yyis_pact_ninf (yyj))
          return;
@@ -2363,11 +2380,19 @@ m4_popdef([b4_at_dollar])])dnl
                {
                  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);
                }
-             else
-               yytoken = YYTRANSLATE (yychar);
+
              yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
              if (*yyconflicts != 0)
                break;
@@ -2602,8 +2627,12 @@ yypdumpstack (yyGLRStack* yystackp)
 ]
 
 b4_epilogue
-b4_defines_if(
-[@output @output_header_name@
+dnl
+dnl glr.cc produces its own header.
+dnl
+m4_if(b4_skeleton, ["glr.c"],
+[b4_defines_if(
+[@output b4_spec_defines_file
 b4_copyright([Skeleton interface for Bison GLR parsers in C],
   [2002, 2003, 2004, 2005, 2006])
 
@@ -2614,4 +2643,4 @@ extern YYSTYPE b4_prefix[]lval;
 b4_locations_if([b4_pure_if([],
 [extern YYLTYPE b4_prefix[]lloc;])
 ])
-])
+])])