X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/0fb669f9d648dfdd7a39478a6b658511455ae966..c826013fb38c98861ef0fc5d4dc3fb3fb4f555be:/data/c.m4?ds=sidebyside diff --git a/data/c.m4 b/data/c.m4 index 581402e5..e7308be3 100644 --- a/data/c.m4 +++ b/data/c.m4 @@ -1,83 +1,97 @@ -m4_divert(-1) -*- Autoconf -*- + -*- Autoconf -*- # C M4 Macros for Bison. -# Copyright (C) 2002, 2004 Free Software Foundation, Inc. +# Copyright (C) 2002, 2004-2010 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) +# b4_comment_(TEXT, OPEN, CONTINUE, END) +# ------------------------------------- +# Put TEXT in comment. Avoid trailing spaces: don't indent empty lines. +# Avoid adding indentation to the first line, as the indentation comes +# from OPEN. That's why we don't patsubst([$1], [^\(.\)], [ \1]). +# +# Prefix all the output lines with PREFIX. +m4_define([b4_comment_], [$2[]m4_bpatsubst([$1], [ +\(.\)], [ +$3\1])$4]) + + +# b4_c_comment(TEXT, [PREFIX]) +# ---------------------------- +# Put TEXT in comment. Avoid trailing spaces: don't indent empty lines. +# Avoid adding indentation to the first line, as the indentation comes +# from "/*". That's why we don't patsubst([$1], [^\(.\)], [ \1]). +# +# Prefix all the output lines with PREFIX. +m4_define([b4_c_comment], +[b4_comment_([$1], [$2/* ], [$2 ], [$2 */])]) + + +# b4_comment(TEXT, [PREFIX]) # -------------------------- -m4_define([b4_copyright], -[/* A Bison parser, made by GNU Bison b4_version. */ - -/* $1, - Copyright (C) $2 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street, Fifth Floor, - Boston, MA 02110-1301, USA. */]) +# By default, C comments. +m4_define([b4_comment], [b4_c_comment($@)]) # 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[" /* 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_if([1], [0])[ +]]) ## ---------------- ## ## 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], @@ -88,24 +102,36 @@ 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) +# --------------------------------------- +# Iterate over the user parameters, binding the declaration to DECL, +# 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_unquote(m4_car($1_$2)))dnl +m4_pushdef([$2], m4_shift($1_$2))dnl +$3[]dnl +m4_popdef([$2])dnl +m4_popdef([$1])dnl +])]) + +# b4_parse_param_use +# ------------------ +# `YYUSE' all the parse-params. +m4_define([b4_parse_param_use], +[b4_parse_param_for([Decl], [Formal], [ YYUSE (Formal); +])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 @@ -119,7 +145,7 @@ m4_define([b4_int_type], m4_eval([0 <= $1]), [1], [unsigned int], - [int])]) + [int])]) # b4_int_type_for(NAME) @@ -130,28 +156,40 @@ m4_define([b4_int_type_for], [b4_int_type($1_min, $1_max)]) -## ------------------ ## -## Decoding options. ## -## ------------------ ## - - -# 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_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])]) - +# 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_integral_parser_table_define(TABLE-NAME, CONTENT, COMMENT) +# ------------------------------------------------------------- +# Define "yy" which contents is CONTENT. +m4_define([b4_integral_parser_table_define], +[m4_ifval([$3], [b4_c_comment([$3], [ ]) +])dnl +static const b4_int_type_for([$2]) yy$1[[]] = +{ + $2 +};dnl +]) ## ------------------------- ## @@ -162,7 +200,17 @@ m4_define([b4_pure_if], # ----------------------------------------- # Output the definition of this token as #define. m4_define([b4_token_define], -[#define $1 $2 +[#define b4_percent_define_get([api.tokens.prefix])$1 $2 +]) + + +# b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) +# ------------------------------------------------------- +# Output the definition of the tokens (if there are) as #defines. +m4_define([b4_token_defines], +[m4_if([$#$1], [1], [], +[/* Tokens. */ +m4_map([b4_token_define], [$@])]) ]) @@ -170,14 +218,14 @@ m4_define([b4_token_define], # --------------------------------------- # Output the definition of this token as an enum. m4_define([b4_token_enum], -[$1 = $2]) +[b4_percent_define_get([api.tokens.prefix])$1 = $2]) -# b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) -# ------------------------------------------------------- -# Output the definition of the tokens (if there are) as enums and #define. -m4_define([b4_token_defines], -[m4_if([$@], [[]], [], +# b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) +# ----------------------------------------------------- +# Output the definition of the tokens (if there are) as enums. +m4_define([b4_token_enums], +[m4_if([$#$1], [1], [], [/* Tokens. */ #ifndef YYTOKENTYPE # define YYTOKENTYPE @@ -186,30 +234,66 @@ m4_define([b4_token_defines], enum yytokentype { m4_map_sep([ b4_token_enum], [, ], - [$@]) + [$@]) }; #endif -m4_map([b4_token_define], [$@]) -]) +])]) + + +# b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) +# ------------------------------------------------------------- +# 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($@)b4_yacc_if([b4_token_defines($@)], []) ]) +## ----------------- ## +## 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], [.$2]))]) + + ## --------------------------------------------- ## ## Defining C functions in both K&R and ANSI-C. ## ## --------------------------------------------- ## +# b4_modern_c +# ----------- +# A predicate useful in #if to determine whether C is ancient or modern. +# +# If __STDC__ is defined, the compiler is modern. IBM xlc 7.0 when run +# as 'cc' doesn't define __STDC__ (or __STDC_VERSION__) for pedantic +# reasons, but it defines __C99__FUNC__ so check that as well. +# Microsoft C normally doesn't define these macros, but it defines _MSC_VER. +# Consider a C++ compiler to be modern if it defines __cplusplus. +# +m4_define([b4_c_modern], + [[(defined __STDC__ || defined __C99__FUNC__ \ + || defined __cplusplus || defined _MSC_VER)]]) + # b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...) # ---------------------------------------------------------- # Declare the function NAME. m4_define([b4_c_function_def], -[#if defined (__STDC__) || defined (__cplusplus) +[#if b4_c_modern b4_c_ansi_function_def($@) #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 ]) @@ -219,7 +303,7 @@ 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 ]) @@ -227,10 +311,9 @@ $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], [$1]) @@ -251,9 +334,9 @@ m4_define([b4_c_knr_formal_name], # Output the K&R argument declarations. m4_define([b4_c_knr_formal_decls], [m4_map_sep([b4_c_knr_formal_decl], - [ + [ ], - [$@])]) + [$@])]) m4_define([b4_c_knr_formal_decl], [ $1;]) @@ -269,7 +352,7 @@ m4_define([b4_c_knr_formal_decl], # ----------------------------------------------------------- # Declare the function NAME. m4_define([b4_c_function_decl], -[#if defined (__STDC__) || defined (__cplusplus) +[#if b4_c_modern b4_c_ansi_function_decl($@) #else $2 $1 (); @@ -281,7 +364,7 @@ $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 ]) @@ -296,7 +379,7 @@ 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 ]) @@ -314,30 +397,22 @@ 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])]) - - -# 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 -m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl - case $4: /* $3 */ -b4_syncline([$2], [$1]) - $5; +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; -m4_popdef([b4_at_dollar])dnl -m4_popdef([b4_dollar_dollar])dnl -]) + break;]) # b4_yydestruct_generate(FUNCTION-DECLARATOR) @@ -345,77 +420,101 @@ m4_popdef([b4_dollar_dollar])dnl # Generate the "yydestruct" function, which declaration is issued using # FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C # or "b4_c_function_def" for K&R. -m4_define([b4_yydestruct_generate], +m4_define_default([b4_yydestruct_generate], [[/*-----------------------------------------------. | Release the memory associated to this symbol. | `-----------------------------------------------*/ +/*ARGSUSED*/ ]$1([yydestruct], [static void], [[const char *yymsg], [yymsg]], [[int yytype], [yytype]], - [[YYSTYPE *yyvaluep], [yyvaluep]]b4_location_if([, - [[YYLTYPE *yylocationp], [yylocationp]]]))[ + [[YYSTYPE *yyvaluep], [yyvaluep]][]dnl +b4_locations_if( [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl +m4_ifset([b4_parse_param], [, b4_parse_param]))[ { - /* Pacify ``unused variable'' warnings. */ - (void) yyvaluep; -]b4_location_if([ (void) yylocationp; -])[ + YYUSE (yyvaluep); +]b4_locations_if([ YYUSE (yylocationp); +])dnl +b4_parse_param_use[]dnl +[ if (!yymsg) yymsg = "Deleting"; YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp); switch (yytype) { -]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ - default: - break; +]b4_symbol_foreach([b4_symbol_destructor])dnl +[ default: + break; } }]dnl ]) -# b4_yysymprint_generate(FUNCTION-DECLARATOR) -# ------------------------------------------- -# Generate the "yysymprint" function, which declaration is issued using +# b4_yy_symbol_print_generate(FUNCTION-DECLARATOR) +# ------------------------------------------------ +# Generate the "yy_symbol_print" function, which declaration is issued using # FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C # or "b4_c_function_def" for K&R. -m4_define([b4_yysymprint_generate], -[[/*--------------------------------. +m4_define_default([b4_yy_symbol_print_generate], +[[ +/*--------------------------------. | Print this symbol on YYOUTPUT. | `--------------------------------*/ -]$1([yysymprint], +/*ARGSUSED*/ +]$1([yy_symbol_value_print], [static void], - [[FILE *yyoutput], [yyoutput]], - [[int yytype], [yytype]], - [[YYSTYPE *yyvaluep], [yyvaluep]]b4_location_if([, - [[YYLTYPE *yylocationp], [yylocationp]]])) + [[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]))[ { - /* Pacify ``unused variable'' warnings. */ - (void) yyvaluep; -b4_location_if([ (void) yylocationp; + if (!yyvaluep) + return; +]b4_locations_if([ YYUSE (yylocationp); ])dnl -[ - if (yytype < YYNTOKENS) - YYFPRINTF (yyoutput, "token %s (", yytname[yytype]); - else - YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]); - -]b4_location_if([ YY_LOCATION_PRINT (yyoutput, *yylocationp); - fprintf (yyoutput, ": "); -])dnl -[ -# ifdef YYPRINT +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 +]b4_symbol_foreach([b4_symbol_printer])dnl [ default: - break; + break; } - YYFPRINTF (yyoutput, ")"); } -]]) + + +/*--------------------------------. +| Print this symbol on YYOUTPUT. | +`--------------------------------*/ + +]$1([yy_symbol_print], + [static void], + [[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) + YYFPRINTF (yyoutput, "token %s (", yytname[yytype]); + else + YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]); + +]b4_locations_if([ YY_LOCATION_PRINT (yyoutput, *yylocationp); + YYFPRINTF (yyoutput, ": "); +])dnl +[ yy_symbol_value_print (yyoutput, yytype, yyvaluep]dnl +b4_locations_if([, yylocationp])[]b4_user_args[); + YYFPRINTF (yyoutput, ")"); +}]dnl +])