X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/bc0f573730251da15be0e545f393d589538d6bfa..3eb4f1a3e62807125a815dc572da9204b5b51865:/data/c.m4

diff --git a/data/c.m4 b/data/c.m4
index 5df04cbb..adf5d4f1 100644
--- a/data/c.m4
+++ b/data/c.m4
@@ -1,8 +1,8 @@
                                                             -*- 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
@@ -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/>.
 
+
+# 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([$1])])])
+
+
 ## ---------------- ##
 ## Identification.  ##
 ## ---------------- ##
@@ -54,7 +81,7 @@ m4_define([b4_comment], [b4_c_comment($@)])
 # -----------------
 # Depends on individual skeletons to define b4_pure_flag, b4_push_flag, or
 # b4_pull_flag if they use the values of the %define variables api.pure or
-# api.push_pull.
+# api.push-pull.
 m4_define([b4_identification],
 [[/* Identify Bison output.  */
 #define YYBISON 1
@@ -73,9 +100,6 @@ m4_define([b4_identification],
 
 /* Pull parsers.  */
 #define YYPULL ]b4_pull_flag])[
-
-/* Using locations.  */
-#define YYLSP_NEEDED ]b4_locations_if([1], [0])[
 ]])
 
 
@@ -83,11 +107,24 @@ m4_define([b4_identification],
 ## Default values.  ##
 ## ---------------- ##
 
+# b4_api_prefix, b4_api_PREFIX
+# ----------------------------
+# Corresponds to %define api.prefix
+b4_percent_define_default([[api.prefix]], [[yy]])
+m4_define([b4_api_prefix],
+[b4_percent_define_get([[api.prefix]])])
+m4_define([b4_api_PREFIX],
+[m4_toupper(b4_api_prefix)])
+
+
+# b4_prefix
+# ---------
+# If the %name-prefix is not given, it is api.prefix.
+m4_define_default([b4_prefix], [b4_api_prefix])
+
 # If the %union is not named, its name is YYSTYPE.
-m4_define_default([b4_union_name], [YYSTYPE])
+m4_define_default([b4_union_name], [b4_api_PREFIX[]STYPE])
 
-# If the %name-prefix is not given, it is yy.
-m4_define_default([b4_prefix], [yy])
 
 ## ------------------------ ##
 ## Pure/impure interfaces.  ##
@@ -120,11 +157,13 @@ m4_popdef([$2])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],
-[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
 ])
 
@@ -146,7 +185,7 @@ m4_define([b4_int_type],
 
        m4_eval([0 <= $1]),                [1], [unsigned int],
 
-					       [int])])
+                                               [int])])
 
 
 # b4_int_type_for(NAME)
@@ -157,24 +196,49 @@ m4_define([b4_int_type_for],
 [b4_int_type($1_min, $1_max)])
 
 
+# b4_table_value_equals(TABLE, VALUE, LITERAL)
+# --------------------------------------------
+# 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.  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[))]])])
+
 
 ## ---------##
 ## 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],
-[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
@@ -190,7 +254,7 @@ static const b4_int_type_for([$2]) yy$1[[]] =
 # -----------------------------------------
 # Output the definition of this token as #define.
 m4_define([b4_token_define],
-[#define b4_percent_define_get([token.prefix])$1 $2
+[#define b4_percent_define_get([api.tokens.prefix])$1 $2
 ])
 
 
@@ -208,7 +272,7 @@ m4_map([b4_token_define], [$@])])
 # ---------------------------------------
 # Output the definition of this token as an enum.
 m4_define([b4_token_enum],
-[b4_percent_define_get([token.prefix])$1 = $2])
+[b4_percent_define_get([api.tokens.prefix])$1 = $2])
 
 
 # b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
@@ -216,18 +280,18 @@ m4_define([b4_token_enum],
 # Output the definition of the tokens (if there are) as enums.
 m4_define([b4_token_enums],
 [m4_if([$#$1], [1], [],
-[/* Tokens.  */
-#ifndef YYTOKENTYPE
-# define YYTOKENTYPE
+[[/* Tokens.  */
+#ifndef ]b4_api_PREFIX[TOKENTYPE
+# define ]b4_api_PREFIX[TOKENTYPE
    /* Put the tokens into the symbol table, so that GDB and other debuggers
       know about them.  */
-   enum yytokentype {
-m4_map_sep([     b4_token_enum], [,
+   enum ]b4_api_prefix[tokentype {
+]m4_map_sep([     b4_token_enum], [,
 ],
-	   [$@])
-   };
+           [$@])
+   };[
 #endif
-])])
+]])])
 
 
 # b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
@@ -303,7 +367,7 @@ $1 (b4_c_ansi_formals(m4_shift2($@)))[]dnl
 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],
 [$1])
@@ -324,9 +388,9 @@ m4_define([b4_c_knr_formal_name],
 # Output the K&R argument declarations.
 m4_define([b4_c_knr_formal_decls],
 [m4_map_sep([b4_c_knr_formal_decl],
-	    [
+            [
 ],
-	    [$@])])
+            [$@])])
 
 m4_define([b4_c_knr_formal_decl],
 [    $1;])
@@ -405,6 +469,15 @@ b4_syncline([@oline@], [@ofile@])
     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
@@ -424,12 +497,8 @@ m4_define_default([b4_yydestruct_generate],
 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);
 
@@ -437,7 +506,7 @@ b4_parse_param_use[]dnl
     {
 ]b4_symbol_foreach([b4_symbol_destructor])dnl
 [      default:
-	break;
+        break;
     }
 }]dnl
 ])
@@ -457,28 +526,28 @@ m4_define_default([b4_yy_symbol_print_generate],
 /*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]))[
 {
-  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);
-# else
-  YYUSE (yyoutput);
 # endif
-  switch (yytype)
+]])dnl
+[  switch (yytype)
     {
 ]b4_symbol_foreach([b4_symbol_printer])dnl
 [      default:
-	break;
+        break;
     }
 }
 
@@ -489,9 +558,9 @@ b4_parse_param_use[]dnl
 
 ]$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]))[
 {
@@ -508,3 +577,102 @@ b4_locations_if([, yylocationp])[]b4_user_args[);
   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 ]b4_api_PREFIX[STYPE && ! defined ]b4_api_PREFIX[STYPE_IS_DECLARED
+]m4_ifdef([b4_stype],
+[[typedef union ]b4_union_name[
+{
+]b4_user_stype[
+} ]b4_api_PREFIX[STYPE;
+# define ]b4_api_PREFIX[STYPE_IS_TRIVIAL 1]],
+[m4_if(b4_tag_seen_flag, 0,
+[[typedef int ]b4_api_PREFIX[STYPE;
+# define ]b4_api_PREFIX[STYPE_IS_TRIVIAL 1]])])[
+# define ]b4_api_prefix[stype ]b4_api_PREFIX[STYPE /* obsolescent; will be withdrawn */
+# define ]b4_api_PREFIX[STYPE_IS_DECLARED 1
+#endif]b4_locations_if([[
+
+#if ! defined ]b4_api_PREFIX[LTYPE && ! defined ]b4_api_PREFIX[LTYPE_IS_DECLARED
+typedef struct ]b4_api_PREFIX[LTYPE
+{
+  int first_line;
+  int first_column;
+  int last_line;
+  int last_column;
+} ]b4_api_PREFIX[LTYPE;
+# define ]b4_api_prefix[ltype ]b4_api_PREFIX[LTYPE /* obsolescent; will be withdrawn */
+# define ]b4_api_PREFIX[LTYPE_IS_DECLARED 1
+# define ]b4_api_PREFIX[LTYPE_IS_TRIVIAL 1
+#endif]])
+
+b4_pure_if([], [[extern ]b4_api_PREFIX[STYPE ]b4_prefix[lval;
+]b4_locations_if([[extern ]b4_api_PREFIX[LTYPE ]b4_prefix[lloc;]])])[]dnl
+])
+
+# b4_YYDEBUG_define
+# ------------------
+m4_define([b4_YYDEBUG_define],
+[[/* Enabling traces.  */
+]m4_if(b4_api_prefix, [yy],
+[[#ifndef YYDEBUG
+# define YYDEBUG ]b4_parse_trace_if([1], [0])[
+#endif]],
+[[#ifndef ]b4_api_PREFIX[DEBUG
+# if defined YYDEBUG
+#if YYDEBUG
+#   define ]b4_api_PREFIX[DEBUG 1
+#  else
+#   define ]b4_api_PREFIX[DEBUG 0
+#  endif
+# else /* ! defined YYDEBUG */
+#  define ]b4_api_PREFIX[DEBUG ]b4_parse_trace_if([1], [0])[
+# endif /* ! defined ]b4_api_PREFIX[DEBUG */
+#endif  /* ! defined ]b4_api_PREFIX[DEBUG */]])[]dnl
+])
+
+# b4_declare_yydebug
+# ------------------
+m4_define([b4_declare_yydebug],
+[b4_YYDEBUG_define[
+#if ]b4_api_PREFIX[DEBUG
+extern int ]b4_prefix[debug;
+#endif][]dnl
+])
+
+# b4_yylloc_default_define
+# ------------------------
+# Define YYLLOC_DEFAULT.
+m4_define([b4_yylloc_default_define],
+[[/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
+   If N is 0, then set CURRENT to the empty location which ends
+   the previous symbol: RHS[0] (always defined).  */
+
+#ifndef YYLLOC_DEFAULT
+# define YYLLOC_DEFAULT(Current, Rhs, N)                                \
+    do                                                                  \
+      if (YYID (N))                                                     \
+        {                                                               \
+          (Current).first_line   = YYRHSLOC (Rhs, 1).first_line;        \
+          (Current).first_column = YYRHSLOC (Rhs, 1).first_column;      \
+          (Current).last_line    = YYRHSLOC (Rhs, N).last_line;         \
+          (Current).last_column  = YYRHSLOC (Rhs, N).last_column;       \
+        }                                                               \
+      else                                                              \
+        {                                                               \
+          (Current).first_line   = (Current).last_line   =              \
+            YYRHSLOC (Rhs, 0).last_line;                                \
+          (Current).first_column = (Current).last_column =              \
+            YYRHSLOC (Rhs, 0).last_column;                              \
+        }                                                               \
+    while (YYID (0))
+#endif
+]])