-*- Autoconf -*- | |
# Language-independent M4 Macros for Bison. | |
# 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 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, see <http://www.gnu.org/licenses/>. | |
## ---------------- ## | |
## Identification. ## | |
## ---------------- ## | |
# b4_copyright(TITLE, YEARS) | |
# -------------------------- | |
m4_define([b4_copyright], | |
[b4_comment([A Bison parser, made by GNU Bison b4_version.]) | |
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 | |
it under the terms of the GNU General Public License as published by | |
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, see <http://www.gnu.org/licenses/>.]) | |
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 | |
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.])]) | |
## -------- ## | |
## Output. ## | |
## -------- ## | |
# b4_output_begin(FILE) | |
# --------------------- | |
# Enable output, i.e., send to diversion 0, expand after "#", and | |
# generate the tag to output into FILE. Must be followed by EOL. | |
m4_define([b4_output_begin], | |
[m4_changecom() | |
m4_divert_push(0)dnl | |
@output(m4_unquote([$1])@)@dnl | |
]) | |
# b4_output_end() | |
# --------------- | |
# Output nothing, restore # as comment character (no expansions after #). | |
m4_define([b4_output_end], | |
[m4_divert_pop(0) | |
m4_changecom([#]) | |
]) | |
## ---------------- ## | |
## 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 stdout. | |
# | |
# For example: | |
# | |
# b4_error([[warn]], [[invalid value for '%s': %s]], [[foo]], [[3]]) | |
m4_define([b4_error], | |
[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_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], | |
[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 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]]]) | |
# b4_warn([[asdf), asdf]], [[fsa), fsa]], [[fdsa), fdsa]]) | |
# b4_warn() | |
# b4_warn(1) | |
# b4_warn(1, 2) | |
# | |
# Should produce this without newlines: | |
# | |
# @warn([asdf), asdf]@,[fsa), fsa]@,[fdsa), fdsa]@) | |
# @warn(asdf), asdf@,fsa), fsa@,fdsa), fdsa@) | |
# @warn(@) | |
# @warn(1@) | |
# @warn(1@,2@) | |
m4_define([b4_warn], | |
[b4_error([[warn]], $@)]) | |
# b4_warn_at(START, END, FORMAT, [ARG1], [ARG2], ...) | |
# --------------------------------------------------- | |
# 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 stdout. | |
# | |
# 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 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 stdout and exit. | |
# | |
# See b4_warn example. | |
m4_define([b4_fatal], | |
[b4_error([[fatal]], $@)dnl | |
m4_exit(1)]) | |
# b4_fatal_at(START, END, FORMAT, [ARG1], [ARG2], ...) | |
# ---------------------------------------------------- | |
# 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]], $@)dnl | |
m4_exit(1)]) | |
## ------------ ## | |
## 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])]) | |
## ------------------ ## | |
## Decoding options. ## | |
## ------------------ ## | |
# 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: ]$1)])]) | |
# b4_define_flag_if(FLAG) | |
# ----------------------- | |
# Define "b4_FLAG_if(IF-TRUE, IF-FALSE)" that depends on the | |
# value of the Boolean FLAG. | |
m4_define([b4_define_flag_if], | |
[_b4_define_flag_if($[1], $[2], [$1])]) | |
# _b4_define_flag_if($1, $2, FLAG) | |
# -------------------------------- | |
# 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 | |
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([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])]) | |
## ----------- ## | |
## 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], | |
[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])]) | |
m4_define([b4_sync_start], [b4_comment([Line $1 of $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_pre_prologue | |
# 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([pre_prologue]) | |
b4_define_user_code([stype]) | |
# 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 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. | |
# | |
# For example, to define b4_foo_user_names to be used for USER-LIST with three | |
# name occurrences and with correct quoting: | |
# | |
# m4_define([b4_foo_user_names], | |
# [[[[[[bar]], [[parser.y:1.7]], [[parser.y:1.16]]]], | |
# [[[[bar]], [[parser.y:5.7]], [[parser.y:5.16]]]], | |
# [[[[baz]], [[parser.y:8.7]], [[parser.y:8.16]]]]]]) | |
# | |
# 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_bison_names for BISON-NAMESPACE and define that | |
# the names bar and baz are used by Bison: | |
# | |
# 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 BISON-NAMESPACE b4_foo_bison_names, and with correct | |
# quoting: | |
# | |
# b4_check_user_names([[foo]], [b4_foo_user_names], | |
# [[b4_foo_bison_names]]) | |
m4_define([b4_check_user_names], | |
[m4_foreach([b4_occurrence], $2, | |
[m4_pushdef([b4_occurrence], b4_occurrence)dnl | |
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_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_*. ## | |
## --------------------- ## | |
# 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, [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], | |
[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) | |
# -------------------------------------------- | |
# 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])dnl | |
m4_define([b4_percent_define_loc(]$1[)], | |
[[[[<skeleton default value>:-1.-1]], | |
[[<skeleton default value>:-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 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: | |
# | |
# b4_percent_code_get | |
# b4_percent_code_get([[foo]]) | |
m4_define([b4_percent_code_get], | |
[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.]]) | |
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 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[_bison_]$2[s]])])]) | |
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])])]) |