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Issue 10807020: Add native Windows binary for bison. (Closed) Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/
Patch Set: Created 8 years, 5 months ago
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1 -*- Autoconf -*-
2
3 # Language-independent M4 Macros for Bison.
4 # Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software Foundation,
5 # Inc.
6
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
11 #
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
16 #
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19
20
21 ## ---------------- ##
22 ## Identification. ##
23 ## ---------------- ##
24
25 # b4_copyright(TITLE, YEARS)
26 # --------------------------
27 m4_define([b4_copyright],
28 [b4_comment([A Bison parser, made by GNU Bison b4_version.])
29
30 b4_comment([$1
31
32 m4_text_wrap([Copyright (C) $2 Free Software Foundation, Inc.], [ ])
33
34 This program is free software: you can redistribute it and/or modify
35 it under the terms of the GNU General Public License as published by
36 the Free Software Foundation, either version 3 of the License, or
37 (at your option) any later version.
38
39 This program is distributed in the hope that it will be useful,
40 but WITHOUT ANY WARRANTY; without even the implied warranty of
41 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
42 GNU General Public License for more details.
43
44 You should have received a copy of the GNU General Public License
45 along with this program. If not, see <http://www.gnu.org/licenses/>.])
46
47 b4_comment([As a special exception, you may create a larger work that contains
48 part or all of the Bison parser skeleton and distribute that work
49 under terms of your choice, so long as that work isn't itself a
50 parser generator using the skeleton or a modified version thereof
51 as a parser skeleton. Alternatively, if you modify or redistribute
52 the parser skeleton itself, you may (at your option) remove this
53 special exception, which will cause the skeleton and the resulting
54 Bison output files to be licensed under the GNU General Public
55 License without this special exception.
56
57 This special exception was added by the Free Software Foundation in
58 version 2.2 of Bison.])])
59
60
61 ## ---------------- ##
62 ## Error handling. ##
63 ## ---------------- ##
64
65 # The following error handling macros print error directives that should not
66 # become arguments of other macro invocations since they would likely then be
67 # mangled. Thus, they print to stdout directly.
68
69 # b4_cat(TEXT)
70 # ------------
71 # Write TEXT to stdout. Precede the final newline with an @ so that it's
72 # escaped. For example:
73 #
74 # b4_cat([[@complain(invalid input@)]])
75 m4_define([b4_cat],
76 [m4_syscmd([cat <<'_m4eof'
77 ]m4_bpatsubst(m4_dquote($1), [_m4eof], [_m4@`eof])[@
78 _m4eof
79 ])dnl
80 m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])])
81
82 # b4_error(KIND, FORMAT, [ARG1], [ARG2], ...)
83 # -------------------------------------------
84 # Write @KIND(FORMAT@,ARG1@,ARG2@,...@) to stdout.
85 #
86 # For example:
87 #
88 # b4_error([[warn]], [[invalid value for `%s': %s]], [[foo]], [[3]])
89 m4_define([b4_error],
90 [b4_cat([[@]$1[(]$2[]]dnl
91 [m4_if([$#], [2], [],
92 [m4_foreach([b4_arg],
93 m4_dquote(m4_shift(m4_shift($@))),
94 [[@,]b4_arg])])[@)]])])
95
96 # b4_error_at(KIND, START, END, FORMAT, [ARG1], [ARG2], ...)
97 # ----------------------------------------------------------
98 # Write @KIND_at(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
99 #
100 # For example:
101 #
102 # b4_error_at([[complain]], [[input.y:2.3]], [[input.y:5.4]],
103 # [[invalid %s]], [[foo]])
104 m4_define([b4_error_at],
105 [b4_cat([[@]$1[_at(]$2[@,]$3[@,]$4[]]dnl
106 [m4_if([$#], [4], [],
107 [m4_foreach([b4_arg],
108 m4_dquote(m4_shift(m4_shift(m4_shift(m4_shift($@))))),
109 [[@,]b4_arg])])[@)]])])
110
111 # b4_warn(FORMAT, [ARG1], [ARG2], ...)
112 # ------------------------------------
113 # Write @warn(FORMAT@,ARG1@,ARG2@,...@) to stdout.
114 #
115 # For example:
116 #
117 # b4_warn([[invalid value for `%s': %s]], [[foo]], [[3]])
118 #
119 # As a simple test suite, this:
120 #
121 # m4_divert(-1)
122 # m4_define([asdf], [ASDF])
123 # m4_define([fsa], [FSA])
124 # m4_define([fdsa], [FDSA])
125 # b4_warn([[[asdf), asdf]]], [[[fsa), fsa]]], [[[fdsa), fdsa]]])
126 # b4_warn([[asdf), asdf]], [[fsa), fsa]], [[fdsa), fdsa]])
127 # b4_warn()
128 # b4_warn(1)
129 # b4_warn(1, 2)
130 #
131 # Should produce this without newlines:
132 #
133 # @warn([asdf), asdf]@,[fsa), fsa]@,[fdsa), fdsa]@)
134 # @warn(asdf), asdf@,fsa), fsa@,fdsa), fdsa@)
135 # @warn(@)
136 # @warn(1@)
137 # @warn(1@,2@)
138 m4_define([b4_warn],
139 [b4_error([[warn]], $@)])
140
141 # b4_warn_at(START, END, FORMAT, [ARG1], [ARG2], ...)
142 # ---------------------------------------------------
143 # Write @warn(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
144 #
145 # For example:
146 #
147 # b4_warn_at([[input.y:2.3]], [[input.y:5.4]], [[invalid %s]], [[foo]])
148 m4_define([b4_warn_at],
149 [b4_error_at([[warn]], $@)])
150
151 # b4_complain(FORMAT, [ARG1], [ARG2], ...)
152 # ----------------------------------------
153 # Write @complain(FORMAT@,ARG1@,ARG2@,...@) to stdout.
154 #
155 # See b4_warn example.
156 m4_define([b4_complain],
157 [b4_error([[complain]], $@)])
158
159 # b4_complain_at(START, END, FORMAT, [ARG1], [ARG2], ...)
160 # -------------------------------------------------------
161 # Write @complain(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
162 #
163 # See b4_warn_at example.
164 m4_define([b4_complain_at],
165 [b4_error_at([[complain]], $@)])
166
167 # b4_fatal(FORMAT, [ARG1], [ARG2], ...)
168 # -------------------------------------
169 # Write @fatal(FORMAT@,ARG1@,ARG2@,...@) to stdout and exit.
170 #
171 # See b4_warn example.
172 m4_define([b4_fatal],
173 [b4_error([[fatal]], $@)dnl
174 m4_exit(1)])
175
176 # b4_fatal_at(START, END, FORMAT, [ARG1], [ARG2], ...)
177 # ----------------------------------------------------
178 # Write @fatal(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout and exit.
179 #
180 # See b4_warn_at example.
181 m4_define([b4_fatal_at],
182 [b4_error_at([[fatal]], $@)dnl
183 m4_exit(1)])
184
185
186 ## ---------------- ##
187 ## Default values. ##
188 ## ---------------- ##
189
190 # m4_define_default([b4_lex_param], []) dnl breaks other skeletons
191 m4_define_default([b4_pre_prologue], [])
192 m4_define_default([b4_post_prologue], [])
193 m4_define_default([b4_epilogue], [])
194 m4_define_default([b4_parse_param], [])
195
196 # The initial column and line.
197 m4_define_default([b4_location_initial_column], [1])
198 m4_define_default([b4_location_initial_line], [1])
199
200
201 ## ------------ ##
202 ## Data Types. ##
203 ## ------------ ##
204
205 # b4_ints_in(INT1, INT2, LOW, HIGH)
206 # ---------------------------------
207 # Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
208 m4_define([b4_ints_in],
209 [m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])
210
211
212
213 ## ------------------ ##
214 ## Decoding options. ##
215 ## ------------------ ##
216
217 # b4_flag_if(FLAG, IF-TRUE, IF-FALSE)
218 # -----------------------------------
219 # Run IF-TRUE if b4_FLAG_flag is 1, IF-FALSE if FLAG is 0, otherwise fail.
220 m4_define([b4_flag_if],
221 [m4_case(b4_$1_flag,
222 [0], [$3],
223 [1], [$2],
224 [m4_fatal([invalid $1 value: ]$1)])])
225
226
227 # b4_define_flag_if(FLAG)
228 # -----------------------
229 # Define "b4_FLAG_if(IF-TRUE, IF-FALSE)" that depends on the
230 # value of the Boolean FLAG.
231 m4_define([b4_define_flag_if],
232 [_b4_define_flag_if($[1], $[2], [$1])])
233
234 # _b4_define_flag_if($1, $2, FLAG)
235 # --------------------------------
236 # This macro works around the impossibility to define macros
237 # inside macros, because issuing `[$1]' is not possible in M4 :(.
238 # This sucks hard, GNU M4 should really provide M5 like $$1.
239 m4_define([_b4_define_flag_if],
240 [m4_if([$1$2], $[1]$[2], [],
241 [m4_fatal([$0: Invalid arguments: $@])])dnl
242 m4_define([b4_$3_if],
243 [b4_flag_if([$3], [$1], [$2])])])
244
245
246 # b4_FLAG_if(IF-TRUE, IF-FALSE)
247 # -----------------------------
248 # Expand IF-TRUE, if FLAG is true, IF-FALSE otherwise.
249 b4_define_flag_if([defines]) # Whether headers are requested.
250 b4_define_flag_if([error_verbose]) # Whether error are verbose.
251 b4_define_flag_if([glr]) # Whether a GLR parser is requested.
252 b4_define_flag_if([locations]) # Whether locations are tracked.
253 b4_define_flag_if([nondeterministic]) # Whether conflicts should be handled.
254 b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated.
255
256
257 ## ------------------------- ##
258 ## Assigning token numbers. ##
259 ## ------------------------- ##
260
261
262 ## ----------- ##
263 ## Synclines. ##
264 ## ----------- ##
265
266 # b4_basename(NAME)
267 # -----------------
268 # Similar to POSIX basename; the differences don't matter here.
269 # Beware that NAME is not evaluated.
270 m4_define([b4_basename],
271 [m4_bpatsubst([$1], [^.*/\([^/]+\)/*$], [\1])])
272
273
274 # b4_syncline(LINE, FILE)
275 # -----------------------
276 m4_define([b4_syncline],
277 [b4_flag_if([synclines], [
278 b4_sync_end([__line__], [b4_basename(m4_quote(__file__))])
279 b4_sync_start([$1], [$2])])])
280
281 m4_define([b4_sync_end], [b4_comment([Line $1 of $2])])
282 m4_define([b4_sync_start], [b4_comment([Line $1 of $2])])
283
284 # b4_user_code(USER-CODE)
285 # -----------------------
286 # Emit code from the user, ending it with synclines.
287 m4_define([b4_user_code],
288 [$1
289 b4_syncline([@oline@], [@ofile@])])
290
291
292 # b4_define_user_code(MACRO)
293 # --------------------------
294 # From b4_MACRO, build b4_user_MACRO that includes the synclines.
295 m4_define([b4_define_user_code],
296 [m4_define([b4_user_$1],
297 [b4_user_code([b4_$1])])])
298
299
300 # b4_user_actions
301 # b4_user_initial_action
302 # b4_user_post_prologue
303 # b4_user_pre_prologue
304 # b4_user_stype
305 # ----------------------
306 # Macros that issue user code, ending with synclines.
307 b4_define_user_code([actions])
308 b4_define_user_code([initial_action])
309 b4_define_user_code([post_prologue])
310 b4_define_user_code([pre_prologue])
311 b4_define_user_code([stype])
312
313
314 # b4_check_user_names(WHAT, USER-LIST, BISON-NAMESPACE)
315 # --------------------------------------------------------
316 # Warn if any name of type WHAT is used by the user (as recorded in USER-LIST)
317 # but is not used by Bison (as recorded by macros in the namespace
318 # BISON-NAMESPACE).
319 #
320 # USER-LIST must expand to a list specifying all grammar occurrences of all
321 # names of type WHAT. Each item in the list must be a triplet specifying one
322 # occurrence: name, start boundary, and end boundary. Empty string names are
323 # fine. An empty list is fine.
324 #
325 # For example, to define b4_foo_user_names to be used for USER-LIST with three
326 # name occurrences and with correct quoting:
327 #
328 # m4_define([b4_foo_user_names],
329 # [[[[[[bar]], [[parser.y:1.7]], [[parser.y:1.16]]]],
330 # [[[[bar]], [[parser.y:5.7]], [[parser.y:5.16]]]],
331 # [[[[baz]], [[parser.y:8.7]], [[parser.y:8.16]]]]]])
332 #
333 # The macro BISON-NAMESPACE(bar) must be defined iff the name bar of type WHAT
334 # is used by Bison (in the front-end or in the skeleton). Empty string names
335 # are fine, but it would be ugly for Bison to actually use one.
336 #
337 # For example, to use b4_foo_bison_names for BISON-NAMESPACE and define that
338 # the names bar and baz are used by Bison:
339 #
340 # m4_define([b4_foo_bison_names(bar)])
341 # m4_define([b4_foo_bison_names(baz)])
342 #
343 # To invoke b4_check_user_names with TYPE foo, with USER-LIST
344 # b4_foo_user_names, with BISON-NAMESPACE b4_foo_bison_names, and with correct
345 # quoting:
346 #
347 # b4_check_user_names([[foo]], [b4_foo_user_names],
348 # [[b4_foo_bison_names]])
349 m4_define([b4_check_user_names],
350 [m4_foreach([b4_occurrence], $2,
351 [m4_pushdef([b4_occurrence], b4_occurrence)dnl
352 m4_pushdef([b4_user_name], m4_car(b4_occurrence))dnl
353 m4_pushdef([b4_start], m4_car(m4_shift(b4_occurrence)))dnl
354 m4_pushdef([b4_end], m4_shift(m4_shift(b4_occurrence)))dnl
355 m4_ifndef($3[(]m4_quote(b4_user_name)[)],
356 [b4_warn_at([b4_start], [b4_end],
357 [[%s `%s' is not used]],
358 [$1], [b4_user_name])])[]dnl
359 m4_popdef([b4_occurrence])dnl
360 m4_popdef([b4_user_name])dnl
361 m4_popdef([b4_start])dnl
362 m4_popdef([b4_end])dnl
363 ])])
364
365 # b4_percent_define_get(VARIABLE)
366 # -------------------------------
367 # Mimic muscle_percent_define_get in ../src/muscle_tab.h exactly. That is, if
368 # the %define variable VARIABLE is defined, emit its value. Also, record
369 # Bison's usage of VARIABLE by defining
370 # b4_percent_define_bison_variables(VARIABLE).
371 #
372 # For example:
373 #
374 # b4_percent_define_get([[foo]])
375 m4_define([b4_percent_define_get],
376 [m4_define([b4_percent_define_bison_variables(]$1[)])dnl
377 m4_ifdef([b4_percent_define(]$1[)], [m4_indir([b4_percent_define(]$1[)])])])
378
379 # b4_percent_define_get_loc(VARIABLE)
380 # -----------------------------------
381 # Mimic muscle_percent_define_get_loc in ../src/muscle_tab.h exactly. That is,
382 # if the %define variable VARIABLE is undefined, complain fatally since that's
383 # a Bison or skeleton error. Otherwise, return its definition location in a
384 # form approriate for the first two arguments of b4_warn_at, b4_complain_at, or
385 # b4_fatal_at. Don't record this as a Bison usage of VARIABLE as there's no
386 # reason to suspect that the user-supplied value has yet influenced the output.
387 #
388 # For example:
389 #
390 # b4_complain_at(b4_percent_define_get_loc([[foo]]), [[invalid foo]])
391 m4_define([b4_percent_define_get_loc],
392 [m4_ifdef([b4_percent_define_loc(]$1[)],
393 [m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl
394 b4_loc[]dnl
395 m4_popdef([b4_loc])],
396 [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_defi ne_get_loc]], [$1])])])
397
398 # b4_percent_define_get_syncline(VARIABLE)
399 # ----------------------------------------
400 # Mimic muscle_percent_define_get_syncline in ../src/muscle_tab.h exactly.
401 # That is, if the %define variable VARIABLE is undefined, complain fatally
402 # since that's a Bison or skeleton error. Otherwise, return its definition
403 # location as a b4_syncline invocation. Don't record this as a Bison usage of
404 # VARIABLE as there's no reason to suspect that the user-supplied value has yet
405 # influenced the output.
406 #
407 # For example:
408 #
409 # b4_percent_define_get_syncline([[foo]])
410 m4_define([b4_percent_define_get_syncline],
411 [m4_ifdef([b4_percent_define_syncline(]$1[)],
412 [m4_indir([b4_percent_define_syncline(]$1[)])],
413 [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_defi ne_get_syncline]], [$1])])])
414
415 # b4_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE])
416 # ------------------------------------------------------
417 # Mimic muscle_percent_define_ifdef in ../src/muscle_tab.h exactly. That is,
418 # if the %define variable VARIABLE is defined, expand IF-TRUE, else expand
419 # IF-FALSE. Also, record Bison's usage of VARIABLE by defining
420 # b4_percent_define_bison_variables(VARIABLE).
421 #
422 # For example:
423 #
424 # b4_percent_define_ifdef([[foo]], [[it's defined]], [[it's undefined]])
425 m4_define([b4_percent_define_ifdef],
426 [m4_ifdef([b4_percent_define(]$1[)],
427 [m4_define([b4_percent_define_bison_variables(]$1[)])$2],
428 [$3])])
429
430 # b4_percent_define_flag_if(VARIABLE, IF-TRUE, [IF-FALSE])
431 # --------------------------------------------------------
432 # Mimic muscle_percent_define_flag_if in ../src/muscle_tab.h exactly. That is,
433 # if the %define variable VARIABLE is defined to "" or "true", expand IF-TRUE.
434 # If it is defined to "false", expand IF-FALSE. Complain if it is undefined
435 # (a Bison or skeleton error since the default value should have been set
436 # already) or defined to any other value (possibly a user error). Also, record
437 # Bison's usage of VARIABLE by defining
438 # b4_percent_define_bison_variables(VARIABLE).
439 #
440 # For example:
441 #
442 # b4_percent_define_flag_if([[foo]], [[it's true]], [[it's false]])
443 m4_define([b4_percent_define_flag_if],
444 [b4_percent_define_ifdef([$1],
445 [m4_case(b4_percent_define_get([$1]),
446 [], [$2], [true], [$2], [false], [$3],
447 [m4_expand_once([b4_complain_at(b4_percent_define_get_loc([$1]),
448 [[invalid value for %%define Boolean variable `%s']],
449 [$1])],
450 [[b4_percent_define_flag_if($1)]])])],
451 [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_flag_ if]], [$1])])])
452
453 # b4_percent_define_default(VARIABLE, DEFAULT)
454 # --------------------------------------------
455 # Mimic muscle_percent_define_default in ../src/muscle_tab.h exactly. That is,
456 # if the %define variable VARIABLE is undefined, set its value to DEFAULT.
457 # Don't record this as a Bison usage of VARIABLE as there's no reason to
458 # suspect that the value has yet influenced the output.
459 #
460 # For example:
461 #
462 # b4_percent_define_default([[foo]], [[default value]])
463 m4_define([b4_percent_define_default],
464 [m4_ifndef([b4_percent_define(]$1[)],
465 [m4_define([b4_percent_define(]$1[)], [$2])dnl
466 m4_define([b4_percent_define_loc(]$1[)],
467 [[[[[Bison:b4_percent_define_default]:1.0]], [[[Bison:b4_p ercent_define_default]:1.0]]]])dnl
468 m4_define([b4_percent_define_syncline(]$1[)],
469 [[]b4_syncline(1, [["[Bison:b4_percent_define_default]"]]) [
470 ]])])])
471
472 # b4_percent_define_check_values(VALUES)
473 # --------------------------------------
474 # Mimic muscle_percent_define_check_values in ../src/muscle_tab.h exactly
475 # except that the VALUES structure is more appropriate for M4. That is, VALUES
476 # is a list of sublists of strings. For each sublist, the first string is the
477 # name of a %define variable, and all remaining strings in that sublist are the
478 # valid values for that variable. Complain if such a variable is undefined (a
479 # Bison error since the default value should have been set already) or defined
480 # to any other value (possibly a user error). Don't record this as a Bison
481 # usage of the variable as there's no reason to suspect that the value has yet
482 # influenced the output.
483 #
484 # For example:
485 #
486 # b4_percent_define_check_values([[[[foo]], [[foo-value1]], [[foo-value2]]]],
487 # [[[[bar]], [[bar-value1]]]])
488 m4_define([b4_percent_define_check_values],
489 [m4_foreach([b4_sublist], m4_quote($@),
490 [_b4_percent_define_check_values(b4_sublist)])])
491
492 m4_define([_b4_percent_define_check_values],
493 [m4_ifdef([b4_percent_define(]$1[)],
494 [m4_pushdef([b4_good_value], [0])dnl
495 m4_if($#, 1, [],
496 [m4_foreach([b4_value], m4_dquote(m4_shift($@)),
497 [m4_if(m4_indir([b4_percent_define(]$1[)]), b4_value,
498 [m4_define([b4_good_value], [1])])])])dnl
499 m4_if(b4_good_value, [0],
500 [b4_complain_at(b4_percent_define_get_loc([$1]),
501 [[invalid value for %%define variable `%s': `%s']],
502 [$1],
503 m4_dquote(m4_indir([b4_percent_define(]$1[)])))])dnl
504 m4_popdef([b4_good_value])],
505 [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_check _values]], [$1])])])
506
507 # b4_percent_code_get([QUALIFIER])
508 # --------------------------------
509 # If any %code blocks for QUALIFIER are defined, emit them beginning with a
510 # comment and ending with synclines and a newline. If QUALIFIER is not
511 # specified or empty, do this for the unqualified %code blocks. Also, record
512 # Bison's usage of QUALIFIER (if specified) by defining
513 # b4_percent_code_bison_qualifiers(QUALIFIER).
514 #
515 # For example, to emit any unqualified %code blocks followed by any %code
516 # blocks for the qualifier foo:
517 #
518 # b4_percent_code_get
519 # b4_percent_code_get([[foo]])
520 m4_define([b4_percent_code_get],
521 [m4_pushdef([b4_macro_name], [[b4_percent_code(]$1[)]])dnl
522 m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])dnl
523 m4_ifdef(b4_macro_name,
524 [b4_comment([m4_if([$#], [0], [[Unqualified %code]],
525 [["%code ]$1["]])[ blocks.]])
526 b4_user_code([m4_indir(b4_macro_name)])
527 ])dnl
528 m4_popdef([b4_macro_name])])
529
530 # b4_percent_code_ifdef(QUALIFIER, IF-TRUE, [IF-FALSE])
531 # -----------------------------------------------------
532 # If any %code blocks for QUALIFIER (or unqualified %code blocks if
533 # QUALIFIER is empty) are defined, expand IF-TRUE, else expand IF-FALSE.
534 # Also, record Bison's usage of QUALIFIER (if specified) by defining
535 # b4_percent_code_bison_qualifiers(QUALIFIER).
536 m4_define([b4_percent_code_ifdef],
537 [m4_ifdef([b4_percent_code(]$1[)],
538 [m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])]) $2],
539 [$3])])
540
541
542 ## ----------------------------------------------------------- ##
543 ## After processing the skeletons, check that all the user's ##
544 ## %define variables and %code qualifiers were used by Bison. ##
545 ## ----------------------------------------------------------- ##
546
547 m4_define([b4_check_user_names_wrap],
548 [m4_ifdef([b4_percent_]$1[_user_]$2[s],
549 [b4_check_user_names([[%]$1 $2],
550 [b4_percent_]$1[_user_]$2[s],
551 [[b4_percent_]$1[_bison_]$2[s]])])])
552
553 m4_wrap_lifo([
554 b4_check_user_names_wrap([[define]], [[variable]])
555 b4_check_user_names_wrap([[code]], [[qualifier]])
556 ])
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