patch for bool portability issues in Bison

[Paul Eggert]

I installed this:

2003-01-03  Paul Eggert  <address@hidden>

        * lib/hash.c (_Bool, bool, false, true, __bool_true_false_are_defined):
        Use the pattern recommended by Autoconf 2.57, except also protect
        against double-definition.
        * src/system.h: Likewise.

        * data/glr.c (yybool): Renamed from bool, to avoid collisions in C.
        All uses changed.  Provide a definition in both C and C++.
        (yytrue, yyfalse): Define even if defined (__cplusplus).

--- lib/hash.c  28 Nov 2002 00:42:28 -0000      1.9
+++ lib/hash.c  3 Jan 2003 14:14:24 -0000       1.10
@@ -1,5 +1,8 @@
 /* hash - hashing table processing.
-   Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+
+   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software
+   Foundation, Inc.
+
    Written by Jim Meyering, 1992.
 
    This program is free software; you can redistribute it and/or modify
@@ -27,11 +30,25 @@
 #if HAVE_STDLIB_H
 # include <stdlib.h>
 #endif
+
 #if HAVE_STDBOOL_H
 # include <stdbool.h>
 #else
-typedef enum {false = 0, true = 1} bool;
+# ifndef __bool_true_false_are_defined
+#  if ! HAVE__BOOL
+#   ifdef __cplusplus
+typedef bool _Bool;
+#   else
+typedef unsigned char _Bool;
+#   endif
+#  endif
+#  define bool _Bool
+#  define false 0
+#  define true 1
+#  define __bool_true_false_are_defined 1
+# endif
 #endif
+
 #include <stdio.h>
 
 #ifndef HAVE_DECL_FREE
--- src/system.h        13 Dec 2002 08:44:28 -0000      1.58
+++ src/system.h        3 Jan 2003 14:15:16 -0000       1.59
@@ -1,5 +1,6 @@
 /* System-dependent definitions for Bison.
-   Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
+
+   Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -185,7 +186,19 @@ void *memrchr (const void *s, int c, siz
 #if HAVE_STDBOOL_H
 # include <stdbool.h>
 #else
-typedef enum {false = 0, true = 1} bool;
+# ifndef __bool_true_false_are_defined
+#  if ! HAVE__BOOL
+#   ifdef __cplusplus
+typedef bool _Bool;
+#   else
+typedef unsigned char _Bool;
+#   endif
+#  endif
+#  define bool _Bool
+#  define false 0
+#  define true 1
+#  define __bool_true_false_are_defined 1
+# endif
 #endif
 
 
--- data/glr.c  26 Dec 2002 08:27:09 -0000      1.47
+++ data/glr.c  3 Jan 2003 14:32:35 -0000       1.49
@@ -1,7 +1,7 @@
 m4_divert(-1)                                                       -*- C -*-
 
 # GLR skeleton for Bison
-# Copyright (C) 2002 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003 Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -138,7 +138,7 @@ m4_define([b4_rhs_location],
 m4_changecom()
 m4_divert(0)dnl
 @output @output_parser_name@
-b4_copyright([Skeleton parser for GLR parsing with Bison], [2002])
+b4_copyright([Skeleton parser for GLR parsing with Bison], [2002, 2003])
 [
 /* This is the parser code for GLR (Generalized LR) parser. */
 
@@ -216,11 +216,13 @@ static YYLTYPE yyloc_default;
 ]/* Line __line__ of glr.c.  */
 b4_syncline(address@hidden@], address@hidden@])
 [
-#if ! defined (__cplusplus)
-   typedef char bool;
-#  define yytrue 1
-#  define yyfalse 0
+#ifdef __cplusplus
+   typedef bool yybool;
+#else
+   typedef unsigned char yybool;
 #endif
+#define yytrue 1
+#define yyfalse 0
 
 /*-----------------.
 | GCC extensions.  |
@@ -536,8 +538,8 @@ typedef struct yyGLRStack yyGLRStack;
 typedef struct yyGLRStateSet yyGLRStateSet;
 
 struct yyGLRState {
-  bool yyisState;
-  bool yyresolved;
+  yybool yyisState;
+  yybool yyresolved;
   yyStateNum yylrState;
   yyGLRState* yypred;
   size_t yyposn;
@@ -554,7 +556,7 @@ struct yyGLRStateSet {
 };
 
 struct yySemanticOption {
-  bool yyisState;
+  yybool yyisState;
   yyRuleNum yyrule;
   yyGLRState* yystate;
   yySemanticOption* yynext;
@@ -713,7 +715,7 @@ yylhsNonterm (yyRuleNum yyrule)
 
 /** True iff LR state STATE has only a default reduction (regardless
  *  of token). */
-static inline bool
+static inline yybool
 yyisDefaultedState (yyStateNum yystate)
 {
   return yyis_pact_ninf (yypact[yystate]);
@@ -772,13 +774,13 @@ yyLRgotoState (yyStateNum yystate, yySym
     return yydefgoto[yylhs - YYNTOKENS];
 }
 
-static inline bool
+static inline yybool
 yyisShiftAction (int yyaction)
 {
   return 0 < yyaction;
 }
 
-static inline bool
+static inline yybool
 yyisErrorAction (int yyaction)
 {
   return yyaction == 0;
@@ -864,7 +866,7 @@ yyexpandGLRStack (yyGLRStack* yystack]b4
        yyn -= 1, yyp0 += 1, yyp1 += 1)
     {
       *yyp1 = *yyp0;
-      if (*(bool*) yyp0)
+      if (*(yybool *) yyp0)
        {
          yyGLRState* yys0 = &yyp0->yystate;
          yyGLRState* yys1 = &yyp1->yystate;
@@ -1123,7 +1125,7 @@ yy_reduce_print (size_t yyk, yyRuleNum y
  */
 static inline YYRESULTTAG
 yyglrReduce (yyGLRStack* yystack, size_t yyk, yyRuleNum yyrule,
-             bool yyforceEval]b4_pure_formals[)
+             yybool yyforceEval]b4_pure_formals[)
 {
   size_t yyposn = yystack->yytops.yystates[yyk]->yyposn;
 
@@ -1209,7 +1211,7 @@ yysplitStack (yyGLRStack* yystack, int y
 /** True iff Y0 and Y1 represent identical options at the top level.
  *  That is, they represent the same rule applied to RHS symbols
  *  that produce the same terminal symbols. */
-static bool
+static yybool
 yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
 {
   if (yyy0->yyrule == yyy1->yyrule)
@@ -1918,7 +1920,7 @@ yypdumpstack (yyGLRStack* yystack)
   for (yyp = yystack->yyitems; yyp < yystack->yynextFree; yyp += 1)
     {
       fprintf (stderr, "%3lu. ", (unsigned long) (yyp - yystack->yyitems));
-      if (*(bool*) yyp)
+      if (*(yybool *) yyp)
        {
          fprintf (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
                   yyp->yystate.yyresolved, yyp->yystate.yylrState,
@@ -1948,7 +1950,7 @@ yypdumpstack (yyGLRStack* yystack)
 b4_epilogue
 m4_if(b4_defines_flag, 0, [],
 address@hidden @output_header_name@
-b4_copyright([Skeleton parser for GLR parsing with Bison], [2002])
+b4_copyright([Skeleton parser for GLR parsing with Bison], [2002, 2003])
 
 b4_token_defines(b4_tokens)