X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/a4e25e1dec3b4e5ff028817eaefa9827041636c2..1168b32295f6acde7a777d9519723fe276155b6b:/data/bison.m4 diff --git a/data/bison.m4 b/data/bison.m4 index 6d37e980..a5c1ee73 100644 --- a/data/bison.m4 +++ b/data/bison.m4 @@ -1,22 +1,21 @@ -*- Autoconf -*- # Language-independent M4 Macros for Bison. -# Copyright (C) 2002, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. -# This program is free software; you can redistribute it and/or modify +# 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 -# 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 . ## ---------------- ## @@ -32,10 +31,10 @@ b4_comment([$1 m4_text_wrap([Copyright (C) $2 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, or (at your option) -any later version. +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 @@ -43,9 +42,7 @@ 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 .]) b4_comment([As a special exception, you may create a larger work that contains part or all of the Bison parser skeleton and distribute that work @@ -65,50 +62,76 @@ version 2.2 of Bison.])]) ## Error handling. ## ## ---------------- ## +# The following error handling macros print error directives that should not +# become arguments of other macro invocations since they would likely then be +# mangled. Thus, they print to stdout directly. + +# b4_cat(TEXT) +# ------------ +# Write TEXT to stdout. Precede the final newline with an @ so that it's +# escaped. For example: +# +# b4_cat([[@complain(invalid input@)]]) +m4_define([b4_cat], +[m4_syscmd([cat <<'_m4eof' +]m4_bpatsubst(m4_dquote($1), [_m4eof], [_m4@`eof])[@ +_m4eof +])dnl +m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])]) + # b4_error(KIND, FORMAT, [ARG1], [ARG2], ...) # ------------------------------------------- -# Write @KIND(FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @KIND(FORMAT@,ARG1@,ARG2@,...@) to stdout. +# +# For example: +# +# b4_error([[warn]], [[invalid value for '%s': %s]], [[foo]], [[3]]) m4_define([b4_error], -[m4_divert_push(0)[@]$1[(]$2[]m4_if([$#], [2], [], -[m4_foreach([b4_arg], - m4_dquote(m4_shift(m4_shift($@))), - [[@,]b4_arg])])[@)]m4_divert_pop(0)]) +[b4_cat([[@]$1[(]$2[]]dnl +[m4_if([$#], [2], [], + [m4_foreach([b4_arg], + m4_dquote(m4_shift(m4_shift($@))), + [[@,]b4_arg])])[@)]])]) # b4_error_at(KIND, START, END, FORMAT, [ARG1], [ARG2], ...) # ---------------------------------------------------------- -# Write @KIND(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @KIND_at(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout. +# +# For example: +# +# b4_error_at([[complain]], [[input.y:2.3]], [[input.y:5.4]], +# [[invalid %s]], [[foo]]) m4_define([b4_error_at], -[m4_divert_push(0)[@]$1[_at(]$2[@,]$3[@,]$4[]m4_if([$#], [4], [], -[m4_foreach([b4_arg], - m4_dquote(m4_shift(m4_shift(m4_shift(m4_shift($@))))), - [[@,]b4_arg])])[@)]m4_divert_pop(0)]) +[b4_cat([[@]$1[_at(]$2[@,]$3[@,]$4[]]dnl +[m4_if([$#], [4], [], + [m4_foreach([b4_arg], + m4_dquote(m4_shift(m4_shift(m4_shift(m4_shift($@))))), + [[@,]b4_arg])])[@)]])]) # b4_warn(FORMAT, [ARG1], [ARG2], ...) # ------------------------------------ -# Write @warn(FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @warn(FORMAT@,ARG1@,ARG2@,...@) to stdout. +# +# For example: +# +# b4_warn([[invalid value for '%s': %s]], [[foo]], [[3]]) # # As a simple test suite, this: # +# m4_divert(-1) # m4_define([asdf], [ASDF]) # m4_define([fsa], [FSA]) # m4_define([fdsa], [FDSA]) # b4_warn([[[asdf), asdf]]], [[[fsa), fsa]]], [[[fdsa), fdsa]]]) -# m4_divert(0) # b4_warn([[asdf), asdf]], [[fsa), fsa]], [[fdsa), fdsa]]) -# m4_divert(0) -# b4_warn([asdf), asdf], [fsa), fsa], [fdsa), fdsa]) -# m4_divert(0) # b4_warn() -# m4_divert(0) # b4_warn(1) -# m4_divert(0) # b4_warn(1, 2) # -# Should produce this: +# Should produce this without newlines: # # @warn([asdf), asdf]@,[fsa), fsa]@,[fdsa), fdsa]@) # @warn(asdf), asdf@,fsa), fsa@,fdsa), fdsa@) -# @warn(ASDF), ASDF@,FSA), FSA@,FDSA), FDSA@) # @warn(@) # @warn(1@) # @warn(1@,2@) @@ -117,37 +140,47 @@ m4_define([b4_warn], # b4_warn_at(START, END, FORMAT, [ARG1], [ARG2], ...) # --------------------------------------------------- -# Write @warn(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @warn(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout. +# +# For example: +# +# b4_warn_at([[input.y:2.3]], [[input.y:5.4]], [[invalid %s]], [[foo]]) m4_define([b4_warn_at], [b4_error_at([[warn]], $@)]) # b4_complain(FORMAT, [ARG1], [ARG2], ...) # ---------------------------------------- -# Write @complain(FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @complain(FORMAT@,ARG1@,ARG2@,...@) to stdout. # -# See the test suite for b4_warn above. +# See b4_warn example. m4_define([b4_complain], [b4_error([[complain]], $@)]) # b4_complain_at(START, END, FORMAT, [ARG1], [ARG2], ...) # ------------------------------------------------------- -# Write @complain(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @complain(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout. +# +# See b4_warn_at example. m4_define([b4_complain_at], [b4_error_at([[complain]], $@)]) # b4_fatal(FORMAT, [ARG1], [ARG2], ...) # ------------------------------------- -# Write @fatal(FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @fatal(FORMAT@,ARG1@,ARG2@,...@) to stdout and exit. # -# See the test suite for b4_warn above. +# See b4_warn example. m4_define([b4_fatal], -[b4_error([[fatal]], $@)]) +[b4_error([[fatal]], $@)dnl +m4_exit(1)]) # b4_fatal_at(START, END, FORMAT, [ARG1], [ARG2], ...) # ---------------------------------------------------- -# Write @fatal(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to diversion 0. +# Write @fatal(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout and exit. +# +# See b4_warn_at example. m4_define([b4_fatal_at], -[b4_error_at([[fatal]], $@)]) +[b4_error_at([[fatal]], $@)dnl +m4_exit(1)]) ## ---------------- ## @@ -200,9 +233,9 @@ 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 @@ -213,19 +246,16 @@ 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([pull]) # Whether pull parsing is requested. -b4_define_flag_if([pure]) # Whether the interface is pure. -b4_define_flag_if([push]) # Whether push parsing is requested. -b4_define_flag_if([use_push_for_pull]) # Whether push parsing should be used - # in place of pull parsing (where - # available) for the sake of the test - # suite. -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])]) ## ------------------------- ## @@ -285,14 +315,14 @@ b4_define_user_code([pre_prologue]) b4_define_user_code([stype]) -# b4_check_user_names(WHAT, USER-LIST, SKELETON-NAMESPACE) -# -------------------------------------------------------- -# Warn if any name of type WHAT is used by the user (as recorded in USER-LIST) -# but is not used by the skeleton (as recorded by macros in the namespace -# SKELETON-NAMESPACE). +# b4_check_user_names(WHAT, USER-LIST, BISON-NAMESPACE) +# ----------------------------------------------------- +# Complain if any name of type WHAT is used by the user (as recorded in +# USER-LIST) 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. # @@ -304,22 +334,22 @@ b4_define_user_code([stype]) # [[[[bar]], [[parser.y:5.7]], [[parser.y:5.16]]]], # [[[[baz]], [[parser.y:8.7]], [[parser.y:8.16]]]]]]) # -# The macro SKELETON-NAMESPACE(bar) must be defined iff the name bar of type -# WHAT is used in the skeleton. Empty string names are fine, but it would be -# ugly for a Bison skeleton to actually use one. +# The macro BISON-NAMESPACE(bar) must be defined iff the name bar of type WHAT +# is used by Bison (in the front-end or in the skeleton). Empty string names +# are fine, but it would be ugly for Bison to actually use one. # -# For example, to use b4_foo_skeleton_names for SKELETON-NAMESPACE and define -# that the names bar and baz are used in the skeleton: +# For example, to use b4_foo_bison_names for BISON-NAMESPACE and define that +# the names bar and baz are used by Bison: # -# m4_define([b4_foo_skeleton_names(bar)]) -# m4_define([b4_foo_skeleton_names(baz)]) +# m4_define([b4_foo_bison_names(bar)]) +# m4_define([b4_foo_bison_names(baz)]) # # To invoke b4_check_user_names with TYPE foo, with USER-LIST -# b4_foo_user_names, with SKELETON-NAMESPACE b4_foo_skeleton_names, and with -# correct quoting: +# b4_foo_user_names, with BISON-NAMESPACE b4_foo_bison_names, and with correct +# quoting: # # b4_check_user_names([[foo]], [b4_foo_user_names], -# [[b4_foo_skeleton_names]]) +# [[b4_foo_bison_names]]) m4_define([b4_check_user_names], [m4_foreach([b4_occurrence], $2, [m4_pushdef([b4_occurrence], b4_occurrence)dnl @@ -327,46 +357,186 @@ m4_pushdef([b4_user_name], m4_car(b4_occurrence))dnl 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_warn_at([b4_start], [b4_end], - [[%s `%s' is not used]], - [$1], [b4_user_name])])[]dnl + [b4_complain_at([b4_start], [b4_end], + [[%s '%s' is not used]], + [$1], [b4_user_name])])[]dnl m4_popdef([b4_occurrence])dnl m4_popdef([b4_user_name])dnl m4_popdef([b4_start])dnl m4_popdef([b4_end])dnl ])]) -# b4_percent_define_get(VARIABLE) + + + +## --------------------- ## +## b4_percent_define_*. ## +## --------------------- ## + + +# b4_percent_define_use(VARIABLE) # ------------------------------- -# If the %define variable VARIABLE is defined, emit its value. Also, record -# the skeleton's usage of VARIABLE by defining -# b4_percent_define_skeleton_variables(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, [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). # # For example: # # b4_percent_define_get([[foo]]) m4_define([b4_percent_define_get], -[m4_define([b4_percent_define_skeleton_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) +# ----------------------------------- +# Mimic muscle_percent_define_get_loc in ../src/muscle-tab.h exactly. That is, +# if the %define variable VARIABLE is undefined, complain fatally since that's +# a Bison or skeleton error. Otherwise, return its definition location in a +# form approriate for the first two arguments of b4_warn_at, b4_complain_at, or +# b4_fatal_at. Don't record this as a Bison usage of VARIABLE as there's no +# reason to suspect that the user-supplied value has yet influenced the output. +# +# For example: +# +# b4_complain_at(b4_percent_define_get_loc([[foo]]), [[invalid foo]]) +m4_define([b4_percent_define_get_loc], +[m4_ifdef([b4_percent_define_loc(]$1[)], + [m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl +b4_loc[]dnl +m4_popdef([b4_loc])], + [b4_fatal([[b4_percent_define_get_loc: undefined %%define variable '%s']], [$1])])]) + +# b4_percent_define_get_syncline(VARIABLE) +# ---------------------------------------- +# Mimic muscle_percent_define_get_syncline in ../src/muscle-tab.h exactly. +# That is, if the %define variable VARIABLE is undefined, complain fatally +# since that's a Bison or skeleton error. Otherwise, return its definition +# location as a b4_syncline invocation. Don't record this as a Bison usage of +# VARIABLE as there's no reason to suspect that the user-supplied value has yet +# influenced the output. +# +# For example: +# +# b4_percent_define_get_syncline([[foo]]) +m4_define([b4_percent_define_get_syncline], +[m4_ifdef([b4_percent_define_syncline(]$1[)], + [m4_indir([b4_percent_define_syncline(]$1[)])], + [b4_fatal([[b4_percent_define_get_syncline: undefined %%define variable '%s']], [$1])])]) + +# b4_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE]) +# ------------------------------------------------------ +# Mimic muscle_percent_define_ifdef in ../src/muscle-tab.h exactly. That is, +# if the %define variable VARIABLE is defined, expand IF-TRUE, else expand +# IF-FALSE. Also, record Bison's usage of VARIABLE by defining +# b4_percent_define_bison_variables(VARIABLE). +# +# For example: +# +# 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], + [$3])]) + +# b4_percent_define_flag_if(VARIABLE, IF-TRUE, [IF-FALSE]) +# -------------------------------------------------------- +# Mimic muscle_percent_define_flag_if in ../src/muscle-tab.h exactly. That is, +# if the %define variable VARIABLE is defined to "" or "true", expand IF-TRUE. +# If it is defined to "false", expand IF-FALSE. Complain if it is undefined +# (a Bison or skeleton error since the default value should have been set +# already) or defined to any other value (possibly a user error). Also, record +# Bison's usage of VARIABLE by defining +# b4_percent_define_bison_variables(VARIABLE). +# +# For example: +# +# b4_percent_define_flag_if([[foo]], [[it's true]], [[it's false]]) +m4_define([b4_percent_define_flag_if], +[b4_percent_define_ifdef([$1], + [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']], + [$1])], + [[b4_percent_define_flag_if($1)]])])], + [b4_fatal([[b4_percent_define_flag_if: undefined %%define variable '%s']], [$1])])]) # b4_percent_define_default(VARIABLE, DEFAULT) # -------------------------------------------- -# If the %define variable VARIABLE is undefined, set its value to DEFAULT. +# Mimic muscle_percent_define_default in ../src/muscle-tab.h exactly. That is, +# if the %define variable VARIABLE is undefined, set its value to DEFAULT. +# Don't record this as a Bison usage of VARIABLE as there's no reason to +# suspect that the value has yet influenced the output. # # For example: # # b4_percent_define_default([[foo]], [[default value]]) m4_define([b4_percent_define_default], [m4_ifndef([b4_percent_define(]$1[)], - [m4_define([b4_percent_define(]$1[)], [$2])])]) + [m4_define([b4_percent_define(]$1[)], [$2])dnl + m4_define([b4_percent_define_loc(]$1[)], + [[[[:-1.-1]], + [[:-1.-1]]]])dnl + m4_define([b4_percent_define_syncline(]$1[)], [[]])])]) + +# b4_percent_define_check_values(VALUES) +# -------------------------------------- +# Mimic muscle_percent_define_check_values in ../src/muscle-tab.h exactly +# except that the VALUES structure is more appropriate for M4. That is, VALUES +# is a list of sublists of strings. For each sublist, the first string is the +# name of a %define variable, and all remaining strings in that sublist are the +# valid values for that variable. Complain if such a variable is undefined (a +# Bison error since the default value should have been set already) or defined +# to any other value (possibly a user error). Don't record this as a Bison +# usage of the variable as there's no reason to suspect that the value has yet +# influenced the output. +# +# For example: +# +# b4_percent_define_check_values([[[[foo]], [[foo-value1]], [[foo-value2]]]], +# [[[[bar]], [[bar-value1]]]]) +m4_define([b4_percent_define_check_values], +[m4_foreach([b4_sublist], m4_quote($@), + [_b4_percent_define_check_values(b4_sublist)])]) + +m4_define([_b4_percent_define_check_values], +[m4_ifdef([b4_percent_define(]$1[)], + [m4_pushdef([b4_good_value], [0])dnl + m4_if($#, 1, [], + [m4_foreach([b4_value], m4_dquote(m4_shift($@)), + [m4_if(m4_indir([b4_percent_define(]$1[)]), b4_value, + [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']], + [$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']], + m4_dquote(b4_value))])])dnl + m4_popdef([b4_good_value])], + [b4_fatal([[b4_percent_define_check_values: undefined %%define variable '%s']], [$1])])]) # b4_percent_code_get([QUALIFIER]) # -------------------------------- # If any %code blocks for QUALIFIER are defined, emit them beginning with a # comment and ending with synclines and a newline. If QUALIFIER is not -# specified (thus, b4_percent_code_get is invoked without parens), do this for -# the unqualified %code blocks. Also, record the skeleton's usage of QUALIFIER -# (if specified) by defining b4_percent_code_skeleton_qualifiers(QUALIFIER). +# specified or empty, do this for the unqualified %code blocks. Also, record +# Bison's usage of QUALIFIER (if specified) by defining +# b4_percent_code_bison_qualifiers(QUALIFIER). # # For example, to emit any unqualified %code blocks followed by any %code # blocks for the qualifier foo: @@ -374,29 +544,39 @@ m4_define([b4_percent_define_default], # b4_percent_code_get # b4_percent_code_get([[foo]]) m4_define([b4_percent_code_get], -[m4_pushdef([b4_macro_name], [[b4_percent_code]]m4_if([$#], [1], [[[(]$1[)]]], - [[[_unqualified]]]))dnl -m4_if([$#], [1], [m4_define([b4_percent_code_skeleton_qualifiers(]$1[)])])dnl +[m4_pushdef([b4_macro_name], [[b4_percent_code(]$1[)]])dnl +m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])dnl m4_ifdef(b4_macro_name, [b4_comment([m4_if([$#], [0], [[Unqualified %code]], - [[%code "]$1["]])[ blocks.]]) + [["%code ]$1["]])[ blocks.]]) b4_user_code([m4_indir(b4_macro_name)]) ])dnl m4_popdef([b4_macro_name])]) +# b4_percent_code_ifdef(QUALIFIER, IF-TRUE, [IF-FALSE]) +# ----------------------------------------------------- +# If any %code blocks for QUALIFIER (or unqualified %code blocks if +# QUALIFIER is empty) are defined, expand IF-TRUE, else expand IF-FALSE. +# Also, record Bison's usage of QUALIFIER (if specified) by defining +# b4_percent_code_bison_qualifiers(QUALIFIER). +m4_define([b4_percent_code_ifdef], +[m4_ifdef([b4_percent_code(]$1[)], + [m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])$2], + [$3])]) + -## --------------------------------------------------------- ## -## After processing the skeletons, check that all the user's ## -## %define variables and %code qualifiers were used. ## -## --------------------------------------------------------- ## +## ----------------------------------------------------------- ## +## After processing the skeletons, check that all the user's ## +## %define variables and %code qualifiers were used by Bison. ## +## ----------------------------------------------------------- ## m4_define([b4_check_user_names_wrap], [m4_ifdef([b4_percent_]$1[_user_]$2[s], [b4_check_user_names([[%]$1 $2], [b4_percent_]$1[_user_]$2[s], - [[b4_percent_]$1[_skeleton_]$2[s]])])]) + [[b4_percent_]$1[_bison_]$2[s]])])]) -m4_wrap([ +m4_wrap_lifo([ b4_check_user_names_wrap([[define]], [[variable]]) b4_check_user_names_wrap([[code]], [[qualifier]]) ])