X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/3dc4aa8c362af2ffeabd2d3cb15a5816d4584ed6..4f82b42a9d5ce6f0baa70714f25346ba9303be73:/data/c.m4 diff --git a/data/c.m4 b/data/c.m4 index 1b521c28..97c80d3d 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 @@ -28,8 +28,9 @@ m4_divert(-1) -*- Autoconf -*- m4_define([b4_copyright], [/* A Bison parser, made by GNU Bison b4_version. */ -/* $1, - Copyright (C) $2 Free Software Foundation, Inc. +/* $1 + +m4_text_wrap([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 @@ -44,7 +45,20 @@ m4_define([b4_copyright], 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. */]) + Boston, MA 02110-1301, USA. */ + +/* As a special exception, you may create a larger work that contains + part or all of the Bison parser skeleton and distribute that work + under terms of your choice, so long as that work isn't itself a + parser generator using the skeleton or a modified version thereof + as a parser skeleton. Alternatively, if you modify or redistribute + the parser skeleton itself, you may (at your option) remove this + special exception, which will cause the skeleton and the resulting + Bison output files to be licensed under the GNU General Public + License without this special exception. + + This special exception was added by the Free Software Foundation in + version 2.2 of Bison. */]) # b4_identification @@ -60,27 +74,34 @@ 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 /* 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]) + +# The initial column and line. +m4_define_default([b4_location_initial_column], [1]) +m4_define_default([b4_location_initial_line], [1]) ## ------------------------ ## ## Pure/impure interfaces. ## ## ------------------------ ## - # b4_user_args # ------------ m4_define([b4_user_args], @@ -95,6 +116,7 @@ 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, @@ -116,11 +138,11 @@ 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. @@ -141,7 +163,7 @@ m4_define([b4_int_type], m4_eval([0 <= $1]), [1], [unsigned int], - [int])]) + [int])]) # b4_int_type_for(NAME) @@ -152,34 +174,65 @@ m4_define([b4_int_type_for], [b4_int_type($1_min, $1_max)]) +## ---------## +## 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]) + + ## ------------------ ## ## 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])]) +# b4_flag_if(FLAG, IF-TRUE, IF-FALSE) +# ----------------------------------- +# Run IF-TRUE if b4_FLAG_flag is 1, IF-FALSE if FLAG is 0, otherwise fail. +m4_define([b4_flag_if], +[m4_case(b4_$1_flag, + [0], [$3], + [1], [$2], + [m4_fatal([invalid $1 value: ]$1)])]) -# 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], - [$2])]) +# b4_define_flag_if(FLAG) +# ----------------------- +# Define "b4_FLAG_if(IF-TRUE, IF-FALSE)" that depends on the +# value of the Boolean FLAG. +m4_define([b4_define_flag_if], +[_b4_define_flag_if($[1], $[2], [$1])]) + +# _b4_define_flag_if($1, $2, FLAG) +# -------------------------------- +# This macro works around the impossibility to define macros +# inside macros, because issuing `[$1]' is not possible in M4 :(. +# This sucks hard, GNU M4 should really provide M5 like $$1. +m4_define([_b4_define_flag_if], +[m4_if([$1$2], $[1]$[2], [], + [m4_fatal([$0: Invalid arguments: $@])])dnl +m4_define([b4_$3_if], + [b4_flag_if([$3], [$1], [$2])])]) + + +# b4_FLAG_if(IF-TRUE, IF-FALSE) +# ----------------------------- +# Expand IF-TRUE, if FLAG is true, IF-FALSE otherwise. +b4_define_flag_if([defines]) # Whether headers are requested. +b4_define_flag_if([error_verbose]) # Whether error are verbose. +b4_define_flag_if([locations]) # Whether locations are tracked. +b4_define_flag_if([pure]) # Whether the interface is pure. +b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated. -# b4_pure_if(IF-TRUE, IF-FALSE) +# b4_push_if(IF-TRUE, IF-FALSE) # ----------------------------- -# Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise. -m4_define([b4_pure_if], -[m4_if(b4_pure, [1], +# Expand IF-TRUE, if %push-parser, IF-FALSE otherwise. +m4_define([b4_push_if], +[m4_if(b4_push_flag, [1], [$1], [$2])]) @@ -227,7 +280,7 @@ m4_define([b4_token_enums], enum yytokentype { m4_map_sep([ b4_token_enum], [, ], - [$@]) + [$@]) }; #endif ])]) @@ -235,9 +288,10 @@ m4_map_sep([ b4_token_enum], [, # b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) # ------------------------------------------------------------- -# Output the definition of the tokens (if there are) as enums and #defines. +# Output the definition of the tokens (if there are any) as enums and, if POSIX +# Yacc is enabled, as #defines. m4_define([b4_token_enums_defines], -[b4_token_enums($@)b4_token_defines($@) +[b4_token_enums($@)b4_yacc_if([b4_token_defines($@)], []) ]) @@ -247,11 +301,25 @@ m4_define([b4_token_enums_defines], ## --------------------------------------------- ## +# b4_modern_c +# ----------- +# A predicate useful in #if to determine whether C is ancient or modern. +# +# If __STDC__ is defined, the compiler is modern. IBM xlc 7.0 when run +# as 'cc' doesn't define __STDC__ (or __STDC_VERSION__) for pedantic +# reasons, but it defines __C99__FUNC__ so check that as well. +# Microsoft C normally doesn't define these macros, but it defines _MSC_VER. +# Consider a C++ compiler to be modern if it defines __cplusplus. +# +m4_define([b4_c_modern], + [[(defined __STDC__ || defined __C99__FUNC__ \ + || defined __cplusplus || defined _MSC_VER)]]) + # b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...) # ---------------------------------------------------------- # Declare the function NAME. m4_define([b4_c_function_def], -[#if defined (__STDC__) || defined (__C99__FUNC__) || defined (__cplusplus) +[#if b4_c_modern b4_c_ansi_function_def($@) #else $2 @@ -275,9 +343,9 @@ $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], [$1]) @@ -298,9 +366,9 @@ m4_define([b4_c_knr_formal_name], # Output the K&R argument declarations. m4_define([b4_c_knr_formal_decls], [m4_map_sep([b4_c_knr_formal_decl], - [ + [ ], - [$@])]) + [$@])]) m4_define([b4_c_knr_formal_decl], [ $1;]) @@ -316,7 +384,7 @@ m4_define([b4_c_knr_formal_decl], # ----------------------------------------------------------- # Declare the function NAME. m4_define([b4_c_function_decl], -[#if defined (__STDC__) || defined (__cplusplus) +[#if defined __STDC__ || defined __cplusplus b4_c_ansi_function_decl($@) #else $2 $1 (); @@ -361,18 +429,63 @@ m4_define([b4_c_arg], ## Synclines. ## ## ----------- ## +# b4_basename(NAME) +# ----------------- +# Similar to POSIX basename; the differences don't matter here. +# Beware that NAME is not evaluated. +m4_define([b4_basename], +[m4_bpatsubst([$1], [^.*/\([^/]+\)/*$], [\1])]) + + # b4_syncline(LINE, FILE) # ----------------------- m4_define([b4_syncline], -[m4_if(b4_synclines_flag, 1, - [[#]line $1 $2])]) +[b4_flag_if([synclines], +[/* Line __line__ of b4_basename(m4_quote(__file__)). */ +[#]line $1 $2])]) + + +# b4_user_code(USER-CODE) +# ----------------------- +# Emit code from the user, ending it with synclines. +m4_define([b4_user_code], +[$1 +b4_syncline([@oline@], [@ofile@])]) +# b4_define_user_code(MACRO) +# -------------------------- +# From b4_MACRO, build b4_user_MACRO that includes the synclines. +m4_define([b4_define_user_code], +[m4_define([b4_user_$1], +[b4_user_code([b4_$1])])]) + + +# b4_user_actions +# b4_user_initial_action +# b4_user_post_prologue +# b4_user_start_header +# b4_user_stype +# ---------------------- +# Macros that issue user code, ending with synclines. +b4_define_user_code([actions]) +b4_define_user_code([initial_action]) +b4_define_user_code([post_prologue]) +b4_define_user_code([start_header]) +b4_define_user_code([stype]) + ## -------------- ## ## 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) @@ -383,9 +496,9 @@ 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 ]) @@ -401,16 +514,17 @@ 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]][]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 [ @@ -422,53 +536,74 @@ b4_parse_param_use[]dnl { ]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]], - [[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 -[ 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, ": "); -])dnl -[ -# ifdef YYPRINT +[# 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; } +} + + +/*--------------------------------. +| 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 ])