X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/1462fcee1ed295b24f47758b370068aa6304bb41..6ee95cd0d900362be987c3910d634e20460d7ad0:/data/bison.m4 diff --git a/data/bison.m4 b/data/bison.m4 index 868f98a1..fac86f2a 100644 --- a/data/bison.m4 +++ b/data/bison.m4 @@ -1,7 +1,8 @@ -*- Autoconf -*- # Language-independent M4 Macros for Bison. -# Copyright (C) 2002, 2004-2010 Free Software Foundation, Inc. + +# Copyright (C) 2002, 2004-2012 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 @@ -84,7 +85,7 @@ m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])]) # # For example: # -# b4_error([[warn]], [[invalid value for `%s': %s]], [[foo]], [[3]]) +# b4_error([[warn]], [[invalid value for '%s': %s]], [[foo]], [[3]]) m4_define([b4_error], [b4_cat([[@]$1[(]$2[]]dnl [m4_if([$#], [2], [], @@ -113,7 +114,7 @@ m4_define([b4_error_at], # # For example: # -# b4_warn([[invalid value for `%s': %s]], [[foo]], [[3]]) +# b4_warn([[invalid value for '%s': %s]], [[foo]], [[3]]) # # As a simple test suite, this: # @@ -182,21 +183,6 @@ m4_define([b4_fatal_at], m4_exit(1)]) -## ---------------- ## -## Default values. ## -## ---------------- ## - -# m4_define_default([b4_lex_param], []) dnl breaks other skeletons -m4_define_default([b4_pre_prologue], []) -m4_define_default([b4_post_prologue], []) -m4_define_default([b4_epilogue], []) -m4_define_default([b4_parse_param], []) - -# The initial column and line. -m4_define_default([b4_location_initial_column], [1]) -m4_define_default([b4_location_initial_line], [1]) - - ## ------------ ## ## Data Types. ## ## ------------ ## @@ -232,9 +218,9 @@ m4_define([b4_define_flag_if], # _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 $$1. +# Work around the impossibility to define macros inside macros, +# because issuing `[$1]' is not possible in M4. GNU M4 should provide +# $$1 a la M5/TeX. m4_define([_b4_define_flag_if], [m4_if([$1$2], $[1]$[2], [], [m4_fatal([$0: Invalid arguments: $@])])dnl @@ -245,17 +231,17 @@ m4_define([b4_$3_if], # 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([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. +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([token_table]) # Whether yytoken_table is demanded. +b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated. +# yytoken_table is needed to support verbose errors. +b4_error_verbose_if([m4_define([b4_token_table_flag], [1])]) -## ------------------------- ## -## Assigning token numbers. ## -## ------------------------- ## ## ----------- ## @@ -273,8 +259,8 @@ m4_define([b4_basename], # b4_syncline(LINE, FILE) # ----------------------- m4_define([b4_syncline], -[b4_flag_if([synclines], [ -b4_sync_end([__line__], [b4_basename(m4_quote(__file__))]) +[b4_flag_if([synclines], +[b4_sync_end([__line__], [b4_basename(m4_quote(__file__))]) b4_sync_start([$1], [$2])])]) m4_define([b4_sync_end], [b4_comment([Line $1 of $2])]) @@ -353,7 +339,7 @@ m4_pushdef([b4_start], m4_car(m4_shift(b4_occurrence)))dnl m4_pushdef([b4_end], m4_shift(m4_shift(b4_occurrence)))dnl m4_ifndef($3[(]m4_quote(b4_user_name)[)], [b4_complain_at([b4_start], [b4_end], - [[%s `%s' is not used]], + [[%s '%s' is not used]], [$1], [b4_user_name])])[]dnl m4_popdef([b4_occurrence])dnl m4_popdef([b4_user_name])dnl @@ -361,10 +347,26 @@ m4_popdef([b4_start])dnl m4_popdef([b4_end])dnl ])]) -# b4_percent_define_get(VARIABLE) + + + +## --------------------- ## +## b4_percent_define_*. ## +## --------------------- ## + + +# b4_percent_define_use(VARIABLE) # ------------------------------- -# Mimic muscle_percent_define_get in ../src/muscle-tab.h exactly. That is, if -# the %define variable VARIABLE is defined, emit its value. Also, record +# 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, [DEFAULT]) +# ------------------------------------------ +# Mimic muscle_percent_define_get in ../src/muscle-tab.h. That is, if +# the %define variable VARIABLE is defined, emit its value. Contrary +# to its C counterpart, return DEFAULT otherwise. Also, record # Bison's usage of VARIABLE by defining # b4_percent_define_bison_variables(VARIABLE). # @@ -372,8 +374,11 @@ 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 -m4_ifdef([b4_percent_define(]$1[)], [m4_indir([b4_percent_define(]$1[)])])]) +[b4_percent_define_use([$1])dnl +m4_ifdef([b4_percent_define(]$1[)], + [m4_indir([b4_percent_define(]$1[)])], + [$2])]) + # b4_percent_define_get_loc(VARIABLE) # ----------------------------------- @@ -392,7 +397,7 @@ m4_define([b4_percent_define_get_loc], [m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl b4_loc[]dnl m4_popdef([b4_loc])], - [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_loc]], [$1])])]) + [b4_fatal([[b4_percent_define_get_loc: undefined %%define variable '%s']], [$1])])]) # b4_percent_define_get_syncline(VARIABLE) # ---------------------------------------- @@ -409,7 +414,7 @@ m4_popdef([b4_loc])], m4_define([b4_percent_define_get_syncline], [m4_ifdef([b4_percent_define_syncline(]$1[)], [m4_indir([b4_percent_define_syncline(]$1[)])], - [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_syncline]], [$1])])]) + [b4_fatal([[b4_percent_define_get_syncline: undefined %%define variable '%s']], [$1])])]) # b4_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE]) # ------------------------------------------------------ @@ -444,10 +449,10 @@ m4_define([b4_percent_define_flag_if], [m4_case(b4_percent_define_get([$1]), [], [$2], [true], [$2], [false], [$3], [m4_expand_once([b4_complain_at(b4_percent_define_get_loc([$1]), - [[invalid value for %%define Boolean variable `%s']], + [[invalid value for %%define Boolean variable '%s']], [$1])], [[b4_percent_define_flag_if($1)]])])], - [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_flag_if]], [$1])])]) + [b4_fatal([[b4_percent_define_flag_if: undefined %%define variable '%s']], [$1])])]) # b4_percent_define_default(VARIABLE, DEFAULT) # -------------------------------------------- @@ -496,15 +501,15 @@ m4_define([_b4_percent_define_check_values], [m4_define([b4_good_value], [1])])])])dnl m4_if(b4_good_value, [0], [b4_complain_at(b4_percent_define_get_loc([$1]), - [[invalid value for %%define variable `%s': `%s']], + [[invalid value for %%define variable '%s': '%s']], [$1], 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']], + [[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])])]) + [b4_fatal([[b4_percent_define_check_values: undefined %%define variable '%s']], [$1])])]) # b4_percent_code_get([QUALIFIER]) # -------------------------------- @@ -556,3 +561,26 @@ m4_wrap_lifo([ b4_check_user_names_wrap([[define]], [[variable]]) b4_check_user_names_wrap([[code]], [[qualifier]]) ]) + + +## ---------------- ## +## Default values. ## +## ---------------- ## + +# m4_define_default([b4_lex_param], []) dnl breaks other skeletons +m4_define_default([b4_pre_prologue], []) +m4_define_default([b4_post_prologue], []) +m4_define_default([b4_epilogue], []) +m4_define_default([b4_parse_param], []) + +# The initial column and line. +m4_define_default([b4_location_initial_column], [1]) +m4_define_default([b4_location_initial_line], [1]) + +# Sanity checks. +b4_percent_define_ifdef([api.prefix], +[m4_ifdef([b4_prefix], +[b4_complain_at(b4_percent_define_get_loc([api.prefix]), + [['%s' and '%s' cannot be used together]], + [%name-prefix], + [%define api.prefix])])])