X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/3bb211139b8f250e7045f59a61a23c7e47ec6a3e..cf499cff31eabd04e37107484647bdd453137d1d:/data/bison.m4?ds=sidebyside diff --git a/data/bison.m4 b/data/bison.m4 index 5930ca72..09287214 100644 --- a/data/bison.m4 +++ b/data/bison.m4 @@ -1,8 +1,8 @@ -*- Autoconf -*- # Language-independent M4 Macros for Bison. -# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, -# Inc. +# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009 +# 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 @@ -255,9 +255,9 @@ m4_define([b4_integral_parser_tables_map], STATE-NUM.]]) $1([defact], [b4_defact], - [[YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE -does not specify something else to do. Zero means the default is an -error.]]) + [[YYDEFACT[S] -- default reduction number in state S. Performed when +YYTABLE does not specify something else to do. Zero means the default +is an error.]]) $1([pgoto], [b4_pgoto], [[YYPGOTO[NTERM-NUM].]]) @@ -266,8 +266,7 @@ $1([defgoto], [b4_defgoto], [[YYDEFGOTO[NTERM-NUM].]]) $1([table], [b4_table], [[YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If positive, shift that token. If negative, reduce the rule which -number is the opposite. If zero, do what YYDEFACT says. -If YYTABLE_NINF, syntax error.]]) +number is the opposite. If YYTABLE_NINF, syntax error.]]) $1([check], [b4_check]) @@ -332,9 +331,7 @@ m4_define([b4_$3_if], # ----------------------------- # 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([glr]) # Whether a GLR parser is requested. -b4_define_flag_if([locations]) # Whether locations are tracked. b4_define_flag_if([nondeterministic]) # Whether conflicts should be handled. b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated. @@ -357,7 +354,7 @@ m4_define([b4_symbol_], # undefined. If FIELD = id, prepend the prefix. m4_define([b4_symbol], [m4_case([$2], - [id], [m4_do([b4_percent_define_get([token.prefix])], + [id], [m4_do([b4_percent_define_get([api.tokens.prefix])], [b4_symbol_([$1], [id])])], [b4_symbol_($@)])]) @@ -508,8 +505,8 @@ b4_define_user_code([stype]) # but is not used by Bison (as recorded by macros in the namespace # BISON-NAMESPACE). # -# USER-LIST must expand to a list specifying all grammar occurrences of all -# names of type WHAT. Each item in the list must be a triplet specifying one +# USER-LIST must expand to a list specifying all user occurrences of all names +# of type WHAT. Each item in the list must be a triplet specifying one # occurrence: name, start boundary, and end boundary. Empty string names are # fine. An empty list is fine. # @@ -553,6 +550,20 @@ m4_popdef([b4_start])dnl m4_popdef([b4_end])dnl ])]) + + +## --------------------- ## +## b4_percent_define_*. ## +## --------------------- ## + + +# b4_percent_define_use(VARIABLE) +# ------------------------------- +# Declare that VARIABLE was used. +m4_define([b4_percent_define_use], +[m4_define([b4_percent_define_bison_variables(]$1[)])dnl +]) + # b4_percent_define_get(VARIABLE) # ------------------------------- # Mimic muscle_percent_define_get in ../src/muscle_tab.h exactly. That is, if @@ -564,7 +575,7 @@ m4_popdef([b4_end])dnl # # b4_percent_define_get([[foo]]) m4_define([b4_percent_define_get], -[m4_define([b4_percent_define_bison_variables(]$1[)])dnl +[b4_percent_define_use([$1])dnl m4_ifdef([b4_percent_define(]$1[)], [m4_indir([b4_percent_define(]$1[)])])]) # b4_percent_define_get_loc(VARIABLE) @@ -615,9 +626,15 @@ m4_define([b4_percent_define_get_syncline], # b4_percent_define_ifdef([[foo]], [[it's defined]], [[it's undefined]]) m4_define([b4_percent_define_ifdef], [m4_ifdef([b4_percent_define(]$1[)], - [m4_define([b4_percent_define_bison_variables(]$1[)])$2], + [b4_percent_define_use([$1])$2], [$3])]) + +## --------- ## +## Options. ## +## --------- ## + + # b4_percent_define_flag_if(VARIABLE, IF-TRUE, [IF-FALSE]) # -------------------------------------------------------- # Mimic muscle_percent_define_flag_if in ../src/muscle_tab.h exactly. That is, @@ -641,6 +658,7 @@ m4_define([b4_percent_define_flag_if], [[b4_percent_define_flag_if($1)]])])], [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_flag_if]], [$1])])]) + # b4_percent_define_default(VARIABLE, DEFAULT) # -------------------------------------------- # Mimic muscle_percent_define_default in ../src/muscle_tab.h exactly. That is, @@ -655,10 +673,23 @@ m4_define([b4_percent_define_default], [m4_ifndef([b4_percent_define(]$1[)], [m4_define([b4_percent_define(]$1[)], [$2])dnl m4_define([b4_percent_define_loc(]$1[)], - [[[[[Bison:b4_percent_define_default]:1.0]], [[[Bison:b4_percent_define_default]:1.0]]]])dnl - m4_define([b4_percent_define_syncline(]$1[)], - [[]b4_syncline(1, [["[Bison:b4_percent_define_default]"]])[ -]])])]) + [[[[:-1.-1]], + [[:-1.-1]]]])dnl + m4_define([b4_percent_define_syncline(]$1[)], [[]])])]) + + +# b4_percent_define_if_define(VARIABLE) +# ------------------------------------- +# Define b4_VARIABLE_if that executes its $1 or $2 depending whether +# VARIABLE was %defined. The characters `.' and `-' in VARIABLE are mapped +# to `_'. +m4_define([b4_percent_define_if_define_], +[m4_define(m4_bpatsubst([b4_$1_if], [[-.]], [_]), + [b4_percent_define_flag_if([$1], [$2], [$3])])]) +m4_define([b4_percent_define_if_define], +[b4_percent_define_default([[$1]], [[false]]) +b4_percent_define_if_define_([$1], $[1], $[2])]) + # b4_percent_define_check_values(VALUES) # -------------------------------------- @@ -691,7 +722,11 @@ m4_define([_b4_percent_define_check_values], [b4_complain_at(b4_percent_define_get_loc([$1]), [[invalid value for %%define variable `%s': `%s']], [$1], - m4_dquote(m4_indir([b4_percent_define(]$1[)])))])dnl + m4_dquote(m4_indir([b4_percent_define(]$1[)]))) + m4_foreach([b4_value], m4_dquote(m4_shift($@)), + [b4_complain_at(b4_percent_define_get_loc([$1]), + [[accepted value: `%s']], + m4_dquote(b4_value))])])dnl m4_popdef([b4_good_value])], [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_check_values]], [$1])])]) @@ -730,11 +765,39 @@ m4_define([b4_percent_code_ifdef], [$3])]) +## ------------------ ## +## Common variables. ## +## ------------------ ## + # Default values for %define. # --------------------------- -# If the %token.prefix, it is empty. -m4_percent_define_default([[token.prefix]], [[]]) - +# If the api.tokens.prefix, it is empty. +m4_percent_define_default([[api.tokens.prefix]], [[]]) + +# b4_parse_assert_if([IF-ASSERTIONS-ARE-USED], [IF-NOT]) +# b4_parse_trace_if([IF-DEBUG-TRACES-ARE-ENABLED], [IF-NOT]) +# b4_lex_symbol_if([IF-YYLEX-RETURNS-A-COMPLETE-SYMBOL], [IF-NOT]) +# b4_variant_if([IF-VARIANT-ARE-USED], [IF-NOT]) +# ---------------------------------------------- +b4_percent_define_if_define([lex_symbol]) +b4_percent_define_if_define([locations]) # Whether locations are tracked. +b4_percent_define_if_define([parse.assert]) +b4_percent_define_if_define([parse.trace]) +b4_percent_define_if_define([variant]) + + +# b4_error_verbose_if([IF-ERRORS-ARE-VERBOSE], [IF-NOT]) +# ------------------------------------------------------ +# Map %define parse.error "(simple|verbose)" to b4_error_verbose_if and +# b4_error_verbose_flag. +b4_percent_define_default([[parse.error]], [[simple]]) +b4_percent_define_check_values([[[[parse.error]], + [[simple]], [[verbose]]]]) +m4_define([b4_error_verbose_flag], + m4_case(b4_percent_define_get([[parse.error]]), + [simple], [[0]], + [verbose], [[1]])) +b4_define_flag_if([error_verbose]) ## ----------------------------------------------------------- ##