X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/cf147260d296ffc3544ddf68565bbdd22dfebab1..8e0a5e9e735620ef5196a155eed1f8cf4d3aab5f:/data/c.m4 diff --git a/data/c.m4 b/data/c.m4 index d8dc6bc4..678b96ab 100644 --- a/data/c.m4 +++ b/data/c.m4 @@ -1,7 +1,7 @@ m4_divert(-1) -*- Autoconf -*- # C M4 Macros for Bison. -# Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc. +# Copyright (C) 2002, 2004, 2005, 2006 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 @@ -18,34 +18,15 @@ m4_divert(-1) -*- Autoconf -*- # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301 USA - ## ---------------- ## ## 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 # ----------------- @@ -60,27 +41,33 @@ m4_define([b4_identification], [#]define YYSKELETON_NAME b4_skeleton /* Pure parsers. */ -[#]define YYPURE b4_pure +[#]define YYPURE b4_pure_flag + +/* Push parsers. */ +[#]define YYPUSH b4_push_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], @@ -91,24 +78,36 @@ 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_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_fst($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 @@ -122,7 +121,7 @@ m4_define([b4_int_type], m4_eval([0 <= $1]), [1], [unsigned int], - [int])]) + [int])]) # b4_int_type_for(NAME) @@ -132,29 +131,15 @@ m4_define([b4_int_type], m4_define([b4_int_type_for], [b4_int_type($1_min, $1_max)]) +## ---------## +## Values. ## +## ---------## -## ------------------ ## -## 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], - [$2])]) - +# b4_null +--------- +# Return a null pointer constant. NULL infringes on the user name +# space in C, so use 0 rather than NULL. +m4_define([b4_null], [0]) ## ------------------------- ## @@ -199,7 +184,7 @@ m4_define([b4_token_enums], enum yytokentype { m4_map_sep([ b4_token_enum], [, ], - [$@]) + [$@]) }; #endif ])]) @@ -207,9 +192,10 @@ m4_map_sep([ b4_token_enum], [, # b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) # ------------------------------------------------------------- -# Output the definition of the tokens (if there are) as enums and #defines. +# Output the definition of the tokens (if there are any) as enums and, if POSIX +# Yacc is enabled, as #defines. m4_define([b4_token_enums_defines], -[b4_token_enums($@)b4_token_defines($@) +[b4_token_enums($@)b4_yacc_if([b4_token_defines($@)], []) ]) @@ -219,11 +205,25 @@ m4_define([b4_token_enums_defines], ## --------------------------------------------- ## +# b4_modern_c +# ----------- +# A predicate useful in #if to determine whether C is ancient or modern. +# +# If __STDC__ is defined, the compiler is modern. IBM xlc 7.0 when run +# as 'cc' doesn't define __STDC__ (or __STDC_VERSION__) for pedantic +# reasons, but it defines __C99__FUNC__ so check that as well. +# Microsoft C normally doesn't define these macros, but it defines _MSC_VER. +# Consider a C++ compiler to be modern if it defines __cplusplus. +# +m4_define([b4_c_modern], + [[(defined __STDC__ || defined __C99__FUNC__ \ + || defined __cplusplus || defined _MSC_VER)]]) + # b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...) # ---------------------------------------------------------- # Declare the function NAME. m4_define([b4_c_function_def], -[#if defined (__STDC__) || defined (__cplusplus) +[#if b4_c_modern b4_c_ansi_function_def($@) #else $2 @@ -247,9 +247,9 @@ $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], [, ], [$@])])]) + [], [void], + [[]], [void], + [m4_map_sep([b4_c_ansi_formal], [, ], [$@])])]) m4_define([b4_c_ansi_formal], [$1]) @@ -270,9 +270,9 @@ m4_define([b4_c_knr_formal_name], # Output the K&R argument declarations. m4_define([b4_c_knr_formal_decls], [m4_map_sep([b4_c_knr_formal_decl], - [ + [ ], - [$@])]) + [$@])]) m4_define([b4_c_knr_formal_decl], [ $1;]) @@ -288,7 +288,7 @@ m4_define([b4_c_knr_formal_decl], # ----------------------------------------------------------- # Declare the function NAME. m4_define([b4_c_function_decl], -[#if defined (__STDC__) || defined (__cplusplus) +[#if defined __STDC__ || defined __cplusplus b4_c_ansi_function_decl($@) #else $2 $1 (); @@ -333,14 +333,22 @@ 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])]) +m4_define([b4_sync_start], [[#]line $1 $2]) +## -------------- ## +## User actions. ## +## -------------- ## + +# b4_case(LABEL, STATEMENTS) +# -------------------------- +m4_define([b4_case], +[ case $1: +$2 + break;]) + # b4_symbol_actions(FILENAME, LINENO, # SYMBOL-TAG, SYMBOL-NUM, # SYMBOL-ACTION, SYMBOL-TYPENAME) @@ -351,9 +359,9 @@ m4_define([b4_symbol_actions], 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 ]) @@ -369,17 +377,20 @@ 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); @@ -388,53 +399,74 @@ m4_define_default([b4_yydestruct_generate], { ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ default: - break; + 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_default([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; -])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); - YYFPRINTF (yyoutput, ": "); + if (!yyvaluep) + return; +]b4_locations_if([ YYUSE (yylocationp); ])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 [ 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 +])