X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/e2a21b6f0c975927445a04a86488956af3351681..3a2803df74bf43b384db752e87be94a1f64fa847:/data/c.m4?ds=sidebyside diff --git a/data/c.m4 b/data/c.m4 index a1372574..46ced826 100644 --- a/data/c.m4 +++ b/data/c.m4 @@ -1,86 +1,75 @@ -m4_divert(-1) -*- Autoconf -*- + -*- Autoconf -*- # C M4 Macros for Bison. -# Copyright (C) 2002, 2004, 2005, 2006 Free Software Foundation, Inc. +# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software +# Foundation, Inc. -# This program is free software; you can redistribute it and/or modify +# 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 -# the Free Software Foundation; either version 2 of the License, or +# the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. - +# # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. - +# # You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -# 02110-1301 USA - +# along with this program. If not, see . ## ---------------- ## ## Identification. ## ## ---------------- ## -# b4_copyright(TITLE, YEARS) -# -------------------------- -m4_define([b4_copyright], -[/* A Bison parser, made by GNU Bison b4_version. */ - -/* $1, - Copyright (C) $2 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 - the Free Software Foundation; either version 2, or (at your option) - any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street, Fifth Floor, - Boston, MA 02110-1301, USA. */]) - +# b4_comment(TEXT) +# ---------------- +m4_define([b4_comment], [/* m4_bpatsubst([$1], [ +], [ + ]) */]) # b4_identification # ----------------- +# 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. m4_define([b4_identification], -[/* Identify Bison output. */ -[#]define YYBISON 1 +[[/* Identify Bison output. */ +#define YYBISON 1 /* Bison version. */ -[#]define YYBISON_VERSION "b4_version" +#define YYBISON_VERSION "]b4_version[" /* Skeleton name. */ -[#]define YYSKELETON_NAME b4_skeleton +#define YYSKELETON_NAME ]b4_skeleton[]m4_ifdef([b4_pure_flag], [[ /* Pure parsers. */ -[#]define YYPURE b4_pure +#define YYPURE ]b4_pure_flag])[]m4_ifdef([b4_push_flag], [[ -/* Using locations. */ -[#]define YYLSP_NEEDED b4_locations_flag -]) +/* Push parsers. */ +#define YYPUSH ]b4_push_flag])[]m4_ifdef([b4_pull_flag], [[ +/* Pull parsers. */ +#define YYPULL ]b4_pull_flag])[ + +/* Using locations. */ +#define YYLSP_NEEDED ]b4_locations_flag[ +]]) ## ---------------- ## ## Default values. ## ## ---------------- ## -m4_define_default([b4_epilogue], []) - +# If the %union is not named, its name is YYSTYPE. +m4_define_default([b4_union_name], [YYSTYPE]) +# If the %name-prefix is not given, it is yy. +m4_define_default([b4_prefix], [yy]) ## ------------------------ ## ## Pure/impure interfaces. ## ## ------------------------ ## - # b4_user_args # ------------ m4_define([b4_user_args], @@ -91,9 +80,8 @@ m4_define([b4_user_args], # -------------- # If defined, b4_parse_param arrives double quoted, but below we prefer # it to be single quoted. -m4_define_default([b4_parse_param]) m4_define([b4_parse_param], -b4_parse_param)) +b4_parse_param) # b4_parse_param_for(DECL, FORMAL, BODY) @@ -102,7 +90,7 @@ b4_parse_param)) # the formal name to FORMAL, and evaluating the BODY. m4_define([b4_parse_param_for], [m4_foreach([$1_$2], m4_defn([b4_parse_param]), -[m4_pushdef([$1], m4_fst($1_$2))dnl +[m4_pushdef([$1], m4_unquote(m4_car($1_$2)))dnl m4_pushdef([$2], m4_shift($1_$2))dnl $3[]dnl m4_popdef([$2])dnl @@ -117,18 +105,11 @@ m4_define([b4_parse_param_use], ])dnl ]) + ## ------------ ## ## Data Types. ## ## ------------ ## - -# b4_ints_in(INT1, INT2, LOW, HIGH) -# --------------------------------- -# Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise. -m4_define([b4_ints_in], -[m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])]) - - # b4_int_type(MIN, MAX) # --------------------- # Return the smallest int type able to handle numbers ranging from @@ -142,7 +123,7 @@ m4_define([b4_int_type], m4_eval([0 <= $1]), [1], [unsigned int], - [int])]) + [int])]) # b4_int_type_for(NAME) @@ -153,37 +134,18 @@ m4_define([b4_int_type_for], [b4_int_type($1_min, $1_max)]) -## ------------------ ## -## Decoding options. ## -## ------------------ ## - - -# b4_error_verbose_if(IF-TRUE, IF-FALSE) -# -------------------------------------- -# Expand IF-TRUE, if errors are verbose, IF-FALSE otherwise. -m4_define([b4_error_verbose_if], -[m4_if(b4_error_verbose, [1], - [$1], - [$2])]) +## ---------## +## Values. ## +## ---------## -# b4_location_if(IF-TRUE, IF-FALSE) -# --------------------------------- -# Expand IF-TRUE, if locations are used, IF-FALSE otherwise. -m4_define([b4_location_if], -[m4_if(b4_locations_flag, [1], - [$1], - [$2])]) +# 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_pure_if(IF-TRUE, IF-FALSE) -# ----------------------------- -# Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise. -m4_define([b4_pure_if], -[m4_if(b4_pure, [1], - [$1], - [$2])]) - ## ------------------------- ## @@ -202,7 +164,7 @@ m4_define([b4_token_define], # ------------------------------------------------------- # Output the definition of the tokens (if there are) as #defines. m4_define([b4_token_defines], -[m4_if([$@], [[]], [], +[m4_if([$#$1], [1], [], [/* Tokens. */ m4_map([b4_token_define], [$@])]) ]) @@ -219,7 +181,7 @@ m4_define([b4_token_enum], # ----------------------------------------------------- # Output the definition of the tokens (if there are) as enums. m4_define([b4_token_enums], -[m4_if([$@], [[]], [], +[m4_if([$#$1], [1], [], [/* Tokens. */ #ifndef YYTOKENTYPE # define YYTOKENTYPE @@ -228,7 +190,7 @@ m4_define([b4_token_enums], enum yytokentype { m4_map_sep([ b4_token_enum], [, ], - [$@]) + [$@]) }; #endif ])]) @@ -236,28 +198,58 @@ m4_map_sep([ b4_token_enum], [, # b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) # ------------------------------------------------------------- -# Output the definition of the tokens (if there are) as enums and #defines. +# Output the definition of the tokens (if there are any) as enums and, if POSIX +# Yacc is enabled, as #defines. m4_define([b4_token_enums_defines], -[b4_token_enums($@)b4_token_defines($@) +[b4_token_enums($@)b4_yacc_if([b4_token_defines($@)], []) ]) +## ----------------- ## +## Semantic Values. ## +## ----------------- ## + + +# b4_symbol_value(VAL, [TYPE]) +# ---------------------------- +# Given a semantic value VAL ($$, $1 etc.), extract its value of type +# TYPE if TYPE is given, otherwise just return VAL. The result can be +# used safetly, it is put in parens to avoid nasty precedence issues. +# TYPE is *not* put in braces, provide some if needed. +m4_define([b4_symbol_value], +[($1[]m4_ifval([$2], [.$2]))]) + + ## --------------------------------------------- ## ## Defining C functions in both K&R and ANSI-C. ## ## --------------------------------------------- ## +# b4_modern_c +# ----------- +# A predicate useful in #if to determine whether C is ancient or modern. +# +# If __STDC__ is defined, the compiler is modern. IBM xlc 7.0 when run +# as 'cc' doesn't define __STDC__ (or __STDC_VERSION__) for pedantic +# reasons, but it defines __C99__FUNC__ so check that as well. +# Microsoft C normally doesn't define these macros, but it defines _MSC_VER. +# Consider a C++ compiler to be modern if it defines __cplusplus. +# +m4_define([b4_c_modern], + [[(defined __STDC__ || defined __C99__FUNC__ \ + || defined __cplusplus || defined _MSC_VER)]]) + # b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...) # ---------------------------------------------------------- # Declare the function NAME. m4_define([b4_c_function_def], -[#if defined (__STDC__) || defined (__C99__FUNC__) || defined (__cplusplus) +[#if b4_c_modern b4_c_ansi_function_def($@) #else $2 -$1 (b4_c_knr_formal_names(m4_shiftn(2, $@))) -b4_c_knr_formal_decls(m4_shiftn(2, $@)) +$1 (b4_c_knr_formal_names(m4_shift2($@))) +b4_c_knr_formal_decls(m4_shift2($@)) #endif[]dnl ]) @@ -267,7 +259,7 @@ b4_c_knr_formal_decls(m4_shiftn(2, $@)) # Declare the function NAME in ANSI. m4_define([b4_c_ansi_function_def], [$2 -$1 (b4_c_ansi_formals(m4_shiftn(2, $@)))[]dnl +$1 (b4_c_ansi_formals(m4_shift2($@)))[]dnl ]) @@ -275,10 +267,9 @@ $1 (b4_c_ansi_formals(m4_shiftn(2, $@)))[]dnl # -------------------------------------- # Output the arguments ANSI-C definition. m4_define([b4_c_ansi_formals], -[m4_case([$@], - [], [void], - [[]], [void], - [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])]) +[m4_if([$#], [0], [void], + [$#$1], [1], [void], + [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])]) m4_define([b4_c_ansi_formal], [$1]) @@ -299,9 +290,9 @@ m4_define([b4_c_knr_formal_name], # Output the K&R argument declarations. m4_define([b4_c_knr_formal_decls], [m4_map_sep([b4_c_knr_formal_decl], - [ + [ ], - [$@])]) + [$@])]) m4_define([b4_c_knr_formal_decl], [ $1;]) @@ -317,7 +308,7 @@ m4_define([b4_c_knr_formal_decl], # ----------------------------------------------------------- # Declare the function NAME. m4_define([b4_c_function_decl], -[#if defined (__STDC__) || defined (__cplusplus) +[#if defined __STDC__ || defined __cplusplus b4_c_ansi_function_decl($@) #else $2 $1 (); @@ -329,7 +320,7 @@ $2 $1 (); # ---------------------------------------------------------------- # Declare the function NAME. m4_define([b4_c_ansi_function_decl], -[$2 $1 (b4_c_ansi_formals(m4_shiftn(2, $@)));[]dnl +[$2 $1 (b4_c_ansi_formals(m4_shift2($@)));[]dnl ]) @@ -344,7 +335,7 @@ m4_define([b4_c_ansi_function_decl], # ----------------------------------------------------------- # Call the function NAME with arguments NAME1, NAME2 etc. m4_define([b4_c_function_call], -[$1 (b4_c_args(m4_shiftn(2, $@)))[]dnl +[$1 (b4_c_args(m4_shift2($@)))[]dnl ]) @@ -362,31 +353,36 @@ m4_define([b4_c_arg], ## Synclines. ## ## ----------- ## -# b4_syncline(LINE, FILE) +# b4_sync_start(LINE, FILE) # ----------------------- -m4_define([b4_syncline], -[m4_if(b4_synclines_flag, 1, - [[#]line $1 $2])]) - +m4_define([b4_sync_start], [[#]line $1 $2]) ## -------------- ## ## User actions. ## ## -------------- ## +# b4_case(LABEL, STATEMENTS) +# -------------------------- +m4_define([b4_case], +[ case $1: +$2 +b4_syncline([@oline@], [@ofile@]) + break;]) + # b4_symbol_actions(FILENAME, LINENO, # SYMBOL-TAG, SYMBOL-NUM, # SYMBOL-ACTION, SYMBOL-TYPENAME) # ------------------------------------------------- m4_define([b4_symbol_actions], [m4_pushdef([b4_dollar_dollar], - [m4_ifval([$6], [(yyvaluep->$6)], [(*yyvaluep)])])dnl + [b4_symbol_value([(*yyvaluep)], [$6])])dnl m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl case $4: /* $3 */ b4_syncline([$2], [$1]) - $5; + $5; b4_syncline([@oline@], [@ofile@]) - break; + break; m4_popdef([b4_at_dollar])dnl m4_popdef([b4_dollar_dollar])dnl ]) @@ -408,11 +404,11 @@ m4_define_default([b4_yydestruct_generate], [[const char *yymsg], [yymsg]], [[int yytype], [yytype]], [[YYSTYPE *yyvaluep], [yyvaluep]][]dnl -b4_location_if( [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl +b4_locations_if( [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl m4_ifset([b4_parse_param], [, b4_parse_param]))[ { YYUSE (yyvaluep); -]b4_location_if([ YYUSE (yylocationp); +]b4_locations_if([ YYUSE (yylocationp); ])dnl b4_parse_param_use[]dnl [ @@ -424,7 +420,7 @@ b4_parse_param_use[]dnl { ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ default: - break; + break; } }]dnl ]) @@ -444,25 +440,28 @@ m4_define_default([b4_yy_symbol_print_generate], /*ARGSUSED*/ ]$1([yy_symbol_value_print], [static void], - [[FILE *yyoutput], [yyoutput]], - [[int yytype], [yytype]], - [[const YYSTYPE * const yyvaluep], [yyvaluep]][]dnl -b4_location_if([, [[const YYLTYPE * const yylocationp], [yylocationp]]])[]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]))[ { - YYUSE (yyvaluep); -]b4_location_if([ YYUSE (yylocationp); + if (!yyvaluep) + return; +]b4_locations_if([ YYUSE (yylocationp); ])dnl b4_parse_param_use[]dnl [# ifdef YYPRINT if (yytype < YYNTOKENS) YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep); +# else + YYUSE (yyoutput); # endif switch (yytype) { ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl [ default: - break; + break; } } @@ -473,10 +472,10 @@ b4_parse_param_use[]dnl ]$1([yy_symbol_print], [static void], - [[FILE *yyoutput], [yyoutput]], - [[int yytype], [yytype]], - [[const YYSTYPE * const yyvaluep], [yyvaluep]][]dnl -b4_location_if([, [[const YYLTYPE * const yylocationp], [yylocationp]]])[]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 (yytype < YYNTOKENS) @@ -484,11 +483,11 @@ m4_ifset([b4_parse_param], [, b4_parse_param]))[ else YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]); -]b4_location_if([ YY_LOCATION_PRINT (yyoutput, *yylocationp); +]b4_locations_if([ YY_LOCATION_PRINT (yyoutput, *yylocationp); YYFPRINTF (yyoutput, ": "); ])dnl [ yy_symbol_value_print (yyoutput, yytype, yyvaluep]dnl -b4_location_if([, yylocationp])[]b4_user_args[); +b4_locations_if([, yylocationp])[]b4_user_args[); YYFPRINTF (yyoutput, ")"); }]dnl ])