Merge remote-tracking branch 'origin/maint'

[bison.git] / data / c.m4

diff --git a/data/c.m4 b/data/c.m4
index 3ba48db5ea55034fb67541caa77dc8f0adb2b837..9bd8295614edd47b2a2e244281b0c322e43d6e9b 100644 (file)
--- a/data/c.m4
+++ b/data/c.m4
@@ -1,8 +1,8 @@
                                                             -*- Autoconf -*-
 
 # C M4 Macros for Bison.
                                                             -*- Autoconf -*-
 
 # C M4 Macros for Bison.

-# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009
-# Free Software Foundation, Inc.
+
+# Copyright (C) 2002, 2004-2012 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
 
 # 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


@@ -17,6 +17,33 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 

+
+# b4_tocpp(STRING)
+# ----------------
+# Convert STRING into a valid C macro name.
+m4_define([b4_tocpp],
+[m4_toupper(m4_bpatsubst(m4_quote($1), [[^a-zA-Z0-9]+], [_]))])
+
+
+# b4_cpp_guard(FILE)
+# ------------------
+# A valid C macro name to use as a CPP header guard for FILE.
+m4_define([b4_cpp_guard],
+[b4_tocpp(m4_defn([b4_prefix])/[$1])])
+
+
+# b4_cpp_guard_open(FILE)
+# b4_cpp_guard_close(FILE)
+# ------------------------
+# Open/close CPP inclusion guards for FILE.
+m4_define([b4_cpp_guard_open],
+[#ifndef b4_cpp_guard([$1])
+# define b4_cpp_guard([$1])])
+
+m4_define([b4_cpp_guard_close],
+[#endif b4_comment([!b4_cpp_guard([$1])])])
+
+

 ## ---------------- ##
 ## Identification.  ##
 ## ---------------- ##
 ## ---------------- ##
 ## Identification.  ##
 ## ---------------- ##


@@ -120,11 +147,13 @@ m4_popdef([$2])dnl
 m4_popdef([$1])dnl
 ])])
 
 m4_popdef([$1])dnl
 ])])
 

-# b4_parse_param_use
-# ------------------
-# `YYUSE' all the parse-params.
+# b4_parse_param_use([VAL], [LOC])
+# --------------------------------
+# `YYUSE' VAL, LOC if locations are enabled, and all the parse-params.

 m4_define([b4_parse_param_use],
 m4_define([b4_parse_param_use],

-[b4_parse_param_for([Decl], [Formal], [  YYUSE (Formal);
+[m4_ifvaln([$1], [  YYUSE([$1]);])dnl
+b4_locations_if([m4_ifvaln([$2], [  YYUSE ([$2]);])])dnl
+b4_parse_param_for([Decl], [Formal], [  YYUSE (Formal);

 ])dnl
 ])
 
 ])dnl
 ])
 


@@ -146,7 +175,7 @@ m4_define([b4_int_type],
 
        m4_eval([0 <= $1]),                [1], [unsigned int],
 
 
        m4_eval([0 <= $1]),                [1], [unsigned int],
 

-                                              [int])])
+                                               [int])])

 
 
 # b4_int_type_for(NAME)
 
 
 # b4_int_type_for(NAME)


@@ -161,30 +190,45 @@ m4_define([b4_int_type_for],
 # --------------------------------------------
 # Without inducing a comparison warning from the compiler, check if the
 # literal value LITERAL equals VALUE from table TABLE, which must have
 # --------------------------------------------
 # Without inducing a comparison warning from the compiler, check if the
 # literal value LITERAL equals VALUE from table TABLE, which must have

-# TABLE_min and TABLE_max defined.
+# TABLE_min and TABLE_max defined.  YYID must be defined as an identity
+# function that suppresses warnings about constant conditions.

 m4_define([b4_table_value_equals],
 [m4_if(m4_eval($3 < m4_indir([b4_]$1[_min])
                || m4_indir([b4_]$1[_max]) < $3), [1],
        [[YYID (0)]],
        [[((]$2[) == (]$3[))]])])
 
 m4_define([b4_table_value_equals],
 [m4_if(m4_eval($3 < m4_indir([b4_]$1[_min])
                || m4_indir([b4_]$1[_max]) < $3), [1],
        [[YYID (0)]],
        [[((]$2[) == (]$3[))]])])
 

+

 ## ---------##
 ## Values.  ##
 ## ---------##
 
 ## ---------##
 ## Values.  ##
 ## ---------##
 

-# b4_null
----------
-# Return a null pointer constant.  NULL infringes on the user name
-# space in C, so use 0 rather than NULL.
-m4_define([b4_null], [0])

 
 

+# b4_null_define
+# --------------
+# Portability issues: define a YY_NULL appropriate for the current
+# language (C, C++98, or C++11).
+m4_define([b4_null_define],
+[# ifndef YY_NULL
+#  if defined __cplusplus && 201103L <= __cplusplus
+#   define YY_NULL nullptr
+#  else
+#   define YY_NULL 0
+#  endif
+# endif[]dnl
+])
+
+
+# b4_null
+# -------
+# Return a null pointer constant.
+m4_define([b4_null], [YY_NULL])

 
 # b4_integral_parser_table_define(TABLE-NAME, CONTENT, COMMENT)
 # -------------------------------------------------------------
 # Define "yy<TABLE-NAME>" which contents is CONTENT.
 m4_define([b4_integral_parser_table_define],
 
 # b4_integral_parser_table_define(TABLE-NAME, CONTENT, COMMENT)
 # -------------------------------------------------------------
 # Define "yy<TABLE-NAME>" which contents is CONTENT.
 m4_define([b4_integral_parser_table_define],

-[m4_ifval([$3], [b4_c_comment([$3], [  ])
-])dnl
+[m4_ifvaln([$3], [b4_c_comment([$3], [  ])])dnl

 static const b4_int_type_for([$2]) yy$1[[]] =
 {
   $2
 static const b4_int_type_for([$2]) yy$1[[]] =
 {
   $2


@@ -234,7 +278,7 @@ m4_define([b4_token_enums],
    enum yytokentype {
 m4_map_sep([     b4_token_enum], [,
 ],
    enum yytokentype {
 m4_map_sep([     b4_token_enum], [,
 ],

-          [$@])
+           [$@])

    };
 #endif
 ])])
    };
 #endif
 ])])


@@ -313,7 +357,7 @@ $1 (b4_c_ansi_formals(m4_shift2($@)))[]dnl
 m4_define([b4_c_ansi_formals],
 [m4_if([$#], [0], [void],
        [$#$1], [1], [void],
 m4_define([b4_c_ansi_formals],
 [m4_if([$#], [0], [void],
        [$#$1], [1], [void],

-              [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
+               [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])

 
 m4_define([b4_c_ansi_formal],
 [$1])
 
 m4_define([b4_c_ansi_formal],
 [$1])


@@ -334,9 +378,9 @@ m4_define([b4_c_knr_formal_name],
 # Output the K&R argument declarations.
 m4_define([b4_c_knr_formal_decls],
 [m4_map_sep([b4_c_knr_formal_decl],
 # Output the K&R argument declarations.
 m4_define([b4_c_knr_formal_decls],
 [m4_map_sep([b4_c_knr_formal_decl],

-           [
+            [

 ],
 ],

-           [$@])])
+            [$@])])

 
 m4_define([b4_c_knr_formal_decl],
 [    $1;])
 
 m4_define([b4_c_knr_formal_decl],
 [    $1;])


@@ -415,6 +459,15 @@ b4_syncline([@oline@], [@ofile@])
     break;])
 
 
     break;])
 
 

+# b4_predicate_case(LABEL, CONDITIONS)
+# ------------------------------------
+m4_define([b4_predicate_case],
+[  case $1:
+    if (! ($2)) YYERROR;
+b4_syncline([@oline@], [@ofile@])
+    break;])
+
+

 # b4_yydestruct_generate(FUNCTION-DECLARATOR)
 # -------------------------------------------
 # Generate the "yydestruct" function, which declaration is issued using
 # b4_yydestruct_generate(FUNCTION-DECLARATOR)
 # -------------------------------------------
 # Generate the "yydestruct" function, which declaration is issued using


@@ -434,12 +487,8 @@ m4_define_default([b4_yydestruct_generate],
 b4_locations_if(            [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 {
 b4_locations_if(            [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 {

-  YYUSE (yyvaluep);
-]b4_locations_if([  YYUSE (yylocationp);
-])dnl
-b4_parse_param_use[]dnl
-[
-  if (!yymsg)
+]b4_parse_param_use([yyvaluep], [yylocationp])dnl
+[  if (!yymsg)

     yymsg = "Deleting";
   YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
 
     yymsg = "Deleting";
   YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
 


@@ -447,7 +496,7 @@ b4_parse_param_use[]dnl
     {
 ]b4_symbol_foreach([b4_symbol_destructor])dnl
 [      default:
     {
 ]b4_symbol_foreach([b4_symbol_destructor])dnl
 [      default:

-       break;
+        break;

     }
 }]dnl
 ])
     }
 }]dnl
 ])


@@ -467,28 +516,28 @@ m4_define_default([b4_yy_symbol_print_generate],
 /*ARGSUSED*/
 ]$1([yy_symbol_value_print],
     [static void],
 /*ARGSUSED*/
 ]$1([yy_symbol_value_print],
     [static void],

-              [[FILE *yyoutput],                       [yyoutput]],
-              [[int yytype],                           [yytype]],
-              [[YYSTYPE const * const yyvaluep],       [yyvaluep]][]dnl
+               [[FILE *yyoutput],                       [yyoutput]],
+               [[int yytype],                           [yytype]],
+               [[YYSTYPE const * const yyvaluep],       [yyvaluep]][]dnl

 b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 {
 b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 {

-  if (!yyvaluep)
-    return;
-]b4_locations_if([  YYUSE (yylocationp);
-])dnl
-b4_parse_param_use[]dnl
-[# ifdef YYPRINT
+  FILE *yyo = yyoutput;
+]b4_parse_param_use([yyo], [yylocationp])dnl
+[  if (!yyvaluep)
+    return;]
+dnl glr.c does not feature yytoknum.
+m4_if(b4_skeleton, ["yacc.c"],
+[[# ifdef YYPRINT

   if (yytype < YYNTOKENS)
     YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
   if (yytype < YYNTOKENS)
     YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);

-# else
-  YYUSE (yyoutput);

 # endif
 # endif

-  switch (yytype)
+]])dnl
+[  switch (yytype)

     {
 ]b4_symbol_foreach([b4_symbol_printer])dnl
 [      default:
     {
 ]b4_symbol_foreach([b4_symbol_printer])dnl
 [      default:

-       break;
+        break;

     }
 }
 
     }
 }
 


@@ -499,9 +548,9 @@ b4_parse_param_use[]dnl
 
 ]$1([yy_symbol_print],
     [static void],
 
 ]$1([yy_symbol_print],
     [static void],

-              [[FILE *yyoutput],                       [yyoutput]],
-              [[int yytype],                           [yytype]],
-              [[YYSTYPE const * const yyvaluep],       [yyvaluep]][]dnl
+               [[FILE *yyoutput],                       [yyoutput]],
+               [[int yytype],                           [yytype]],
+               [[YYSTYPE const * const yyvaluep],       [yyvaluep]][]dnl

 b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 {
 b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 {


@@ -518,3 +567,55 @@ b4_locations_if([, yylocationp])[]b4_user_args[);
   YYFPRINTF (yyoutput, ")");
 }]dnl
 ])
   YYFPRINTF (yyoutput, ")");
 }]dnl
 ])

+
+## -------------- ##
+## Declarations.  ##
+## -------------- ##
+
+# b4_declare_yylstype
+# ------------------
+# Declarations that might either go into the header (if --defines) or
+# in the parser body.  Declare YYSTYPE/YYLTYPE, and yylval/yylloc.
+m4_define([b4_declare_yylstype],
+[[#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
+]m4_ifdef([b4_stype],
+[[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
+#endif]b4_locations_if([[
+
+#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
+typedef struct YYLTYPE
+{
+  int first_line;
+  int first_column;
+  int last_line;
+  int last_column;
+} YYLTYPE;
+# define yyltype YYLTYPE /* obsolescent; will be withdrawn */
+# define YYLTYPE_IS_DECLARED 1
+# define YYLTYPE_IS_TRIVIAL 1
+#endif]])
+
+b4_pure_if([], [[extern YYSTYPE ]b4_prefix[lval;
+]b4_locations_if([[extern YYLTYPE ]b4_prefix[lloc;]])])[]dnl
+])
+
+# b4_declare_yydebug
+# ------------------
+m4_define([b4_declare_yydebug],
+[[/* Enabling traces.  */
+#ifndef YYDEBUG
+# define YYDEBUG ]b4_parse_trace_if([1], [0])[
+#endif
+#if YYDEBUG
+extern int ]b4_prefix[debug;
+#endif][]dnl
+])