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1 # Java skeleton for Bison -*- autoconf -*-
2
3 # Copyright (C) 2007-2010 Free Software Foundation, Inc.
4
5 # This program is free software: you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation, either version 3 of the License, or
8 # (at your option) any later version.
9 #
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
14 #
15 # You should have received a copy of the GNU General Public License
16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 m4_include(b4_pkgdatadir/[java.m4])
19
20 b4_defines_if([b4_fatal([%s: %%defines does not make sense in Java],
21 [b4_skeleton])])
22
23 # We don't depend on %debug in Java, but pacify warnings about non-used flags.
24 b4_parse_trace_if([0], [0])
25
26 m4_define([b4_symbol_no_destructor_assert],
27 [b4_symbol_if([$1], [has_destructor],
28 [b4_fatal([%s: %s: %%destructor does not make sense in Java],
29 [b4_skeleton],
30 [b4_symbol_action_location([$1], [destructor])])])])
31 b4_symbol_foreach([b4_symbol_no_destructor_assert])
32
33 m4_divert_push(0)dnl
34 @output(b4_parser_file_name@)@
35 b4_copyright([Skeleton implementation for Bison LALR(1) parsers in Java],
36 [2007-2010])
37
38 b4_percent_define_ifdef([package], [package b4_percent_define_get([package]);
39 ])[/* First part of user declarations. */
40 ]b4_user_pre_prologue
41 b4_user_post_prologue
42 b4_percent_code_get([[imports]])
43 [/**
44 * A Bison parser, automatically generated from <tt>]m4_bpatsubst(b4_file_name, [^"\(.*\)"$], [\1])[</tt>.
45 *
46 * @@author LALR (1) parser skeleton written by Paolo Bonzini.
47 */
48 ]b4_percent_define_get3([annotations], [], [ ])dnl
49 b4_public_if([public ])dnl
50 b4_abstract_if([abstract ])dnl
51 b4_final_if([final ])dnl
52 b4_strictfp_if([strictfp ])dnl
53 [class ]b4_parser_class_name[]dnl
54 b4_percent_define_get3([extends], [ extends ])dnl
55 b4_percent_define_get3([implements], [ implements ])[
56 {
57 ]b4_identification[
58 ]b4_error_verbose_if([[
59 /** True if verbose error messages are enabled. */
60 private boolean yyErrorVerbose = true;
61
62 /**
63 * Return whether verbose error messages are enabled.
64 */
65 public final boolean getErrorVerbose() { return yyErrorVerbose; }
66
67 /**
68 * Set the verbosity of error messages.
69 * @@param verbose True to request verbose error messages.
70 */
71 public final void setErrorVerbose(boolean verbose)
72 { yyErrorVerbose = verbose; }
73 ]])
74
75 b4_locations_if([[
76 /**
77 * A class defining a pair of positions. Positions, defined by the
78 * <code>]b4_position_type[</code> class, denote a point in the input.
79 * Locations represent a part of the input through the beginning
80 * and ending positions. */
81 public class ]b4_location_type[ {
82 /** The first, inclusive, position in the range. */
83 public ]b4_position_type[ begin;
84
85 /** The first position beyond the range. */
86 public ]b4_position_type[ end;
87
88 /**
89 * Create a <code>]b4_location_type[</code> denoting an empty range located at
90 * a given point.
91 * @@param loc The position at which the range is anchored. */
92 public ]b4_location_type[ (]b4_position_type[ loc) {
93 this.begin = this.end = loc;
94 }
95
96 /**
97 * Create a <code>]b4_location_type[</code> from the endpoints of the range.
98 * @@param begin The first position included in the range.
99 * @@param end The first position beyond the range. */
100 public ]b4_location_type[ (]b4_position_type[ begin, ]b4_position_type[ end) {
101 this.begin = begin;
102 this.end = end;
103 }
104
105 /**
106 * Print a representation of the location. For this to be correct,
107 * <code>]b4_position_type[</code> should override the <code>equals</code>
108 * method. */
109 public String toString () {
110 if (begin.equals (end))
111 return begin.toString ();
112 else
113 return begin.toString () + "-" + end.toString ();
114 }
115 }
116
117 ]])
118
119 b4_locations_if([[
120 private ]b4_location_type[ yylloc (YYStack rhs, int n)
121 {
122 if (n > 0)
123 return new ]b4_location_type[ (rhs.locationAt (1).begin, rhs.locationAt (n).end);
124 else
125 return new ]b4_location_type[ (rhs.locationAt (0).end);
126 }]])[
127
128 /**
129 * Communication interface between the scanner and the Bison-generated
130 * parser <tt>]b4_parser_class_name[</tt>.
131 */
132 public interface Lexer {
133 /** Token returned by the scanner to signal the end of its input. */
134 public static final int EOF = 0;
135
136 ]b4_token_enums(b4_tokens)[
137
138 ]b4_locations_if([[/**
139 * Method to retrieve the beginning position of the last scanned token.
140 * @@return the position at which the last scanned token starts. */
141 ]b4_position_type[ getStartPos ();
142
143 /**
144 * Method to retrieve the ending position of the last scanned token.
145 * @@return the first position beyond the last scanned token. */
146 ]b4_position_type[ getEndPos ();]])[
147
148 /**
149 * Method to retrieve the semantic value of the last scanned token.
150 * @@return the semantic value of the last scanned token. */
151 ]b4_yystype[ getLVal ();
152
153 /**
154 * Entry point for the scanner. Returns the token identifier corresponding
155 * to the next token and prepares to return the semantic value
156 * ]b4_locations_if([and beginning/ending positions ])[of the token.
157 * @@return the token identifier corresponding to the next token. */
158 int yylex () ]b4_maybe_throws([b4_lex_throws])[;
159
160 /**
161 * Entry point for error reporting. Emits an error
162 * ]b4_locations_if([referring to the given location ])[in a user-defined way.
163 *
164 * ]b4_locations_if([[@@param loc The location of the element to which the
165 * error message is related]])[
166 * @@param msg The string for the error message. */
167 void yyerror (]b4_locations_if([b4_location_type[ loc, ]])[String msg);]
168 }
169
170 b4_lexer_if([[private class YYLexer implements Lexer {
171 ]b4_percent_code_get([[lexer]])[
172 }
173
174 ]])[/** The object doing lexical analysis for us. */
175 private Lexer yylexer;
176 ]
177 b4_parse_param_vars
178
179 b4_lexer_if([[
180 /**
181 * Instantiates the Bison-generated parser.
182 */
183 public ]b4_parser_class_name (b4_parse_param_decl([b4_lex_param_decl])[) ]b4_maybe_throws([b4_init_throws])[
184 {
185 ]b4_percent_code_get([[init]])[
186 this.yylexer = new YYLexer(]b4_lex_param_call[);
187 ]b4_parse_param_cons[
188 }
189 ]])
190
191 /**
192 * Instantiates the Bison-generated parser.
193 * @@param yylexer The scanner that will supply tokens to the parser.
194 */
195 b4_lexer_if([[protected]], [[public]]) b4_parser_class_name[ (]b4_parse_param_decl([[Lexer yylexer]])[) ]b4_maybe_throws([b4_init_throws])[
196 {
197 ]b4_percent_code_get([[init]])[
198 this.yylexer = yylexer;
199 ]b4_parse_param_cons[
200 }
201
202 private java.io.PrintStream yyDebugStream = System.err;
203
204 /**
205 * Return the <tt>PrintStream</tt> on which the debugging output is
206 * printed.
207 */
208 public final java.io.PrintStream getDebugStream () { return yyDebugStream; }
209
210 /**
211 * Set the <tt>PrintStream</tt> on which the debug output is printed.
212 * @@param s The stream that is used for debugging output.
213 */
214 public final void setDebugStream(java.io.PrintStream s) { yyDebugStream = s; }
215
216 private int yydebug = 0;
217
218 /**
219 * Answer the verbosity of the debugging output; 0 means that all kinds of
220 * output from the parser are suppressed.
221 */
222 public final int getDebugLevel() { return yydebug; }
223
224 /**
225 * Set the verbosity of the debugging output; 0 means that all kinds of
226 * output from the parser are suppressed.
227 * @@param level The verbosity level for debugging output.
228 */
229 public final void setDebugLevel(int level) { yydebug = level; }
230
231 /**
232 * Print an error message via the lexer.
233 *]b4_locations_if([[ Use a <code>null</code> location.]])[
234 * @@param msg The error message.
235 */
236 public final void yyerror (String msg)
237 {
238 yylexer.yyerror (]b4_locations_if([[(]b4_location_type[)null, ]])[msg);
239 }
240 ]b4_locations_if([[
241 /**
242 * Print an error message via the lexer.
243 * @@param loc The location associated with the message.
244 * @@param msg The error message.
245 */
246 public final void yyerror (]b4_location_type[ loc, String msg)
247 {
248 yylexer.yyerror (loc, msg);
249 }
250
251 /**
252 * Print an error message via the lexer.
253 * @@param pos The position associated with the message.
254 * @@param msg The error message.
255 */
256 public final void yyerror (]b4_position_type[ pos, String msg)
257 {
258 yylexer.yyerror (new ]b4_location_type[ (pos), msg);
259 }]])
260
261 [protected final void yycdebug (String s) {
262 if (yydebug > 0)
263 yyDebugStream.println (s);
264 }
265
266 private final class YYStack {
267 private int[] stateStack = new int[16];
268 ]b4_locations_if([[private ]b4_location_type[[] locStack = new ]b4_location_type[[16];]])[
269 private ]b4_yystype[[] valueStack = new ]b4_yystype[[16];
270
271 public int size = 16;
272 public int height = -1;
273
274 public final void push (int state, ]b4_yystype[ value]dnl
275 b4_locations_if([, ]b4_location_type[ loc])[) {
276 height++;
277 if (size == height)
278 {
279 int[] newStateStack = new int[size * 2];
280 System.arraycopy (stateStack, 0, newStateStack, 0, height);
281 stateStack = newStateStack;
282 ]b4_locations_if([[
283 ]b4_location_type[[] newLocStack = new ]b4_location_type[[size * 2];
284 System.arraycopy (locStack, 0, newLocStack, 0, height);
285 locStack = newLocStack;]])
286
287 b4_yystype[[] newValueStack = new ]b4_yystype[[size * 2];
288 System.arraycopy (valueStack, 0, newValueStack, 0, height);
289 valueStack = newValueStack;
290
291 size *= 2;
292 }
293
294 stateStack[height] = state;
295 ]b4_locations_if([[locStack[height] = loc;]])[
296 valueStack[height] = value;
297 }
298
299 public final void pop () {
300 height--;
301 }
302
303 public final void pop (int num) {
304 // Avoid memory leaks... garbage collection is a white lie!
305 if (num > 0) {
306 java.util.Arrays.fill (valueStack, height - num + 1, height, null);
307 ]b4_locations_if([[java.util.Arrays.fill (locStack, height - num + 1, height, null);]])[
308 }
309 height -= num;
310 }
311
312 public final int stateAt (int i) {
313 return stateStack[height - i];
314 }
315
316 ]b4_locations_if([[public final ]b4_location_type[ locationAt (int i) {
317 return locStack[height - i];
318 }
319
320 ]])[public final ]b4_yystype[ valueAt (int i) {
321 return valueStack[height - i];
322 }
323
324 // Print the state stack on the debug stream.
325 public void print (java.io.PrintStream out)
326 {
327 out.print ("Stack now");
328
329 for (int i = 0; i < height; i++)
330 {
331 out.print (' ');
332 out.print (stateStack[i]);
333 }
334 out.println ();
335 }
336 }
337
338 /**
339 * Returned by a Bison action in order to stop the parsing process and
340 * return success (<tt>true</tt>). */
341 public static final int YYACCEPT = 0;
342
343 /**
344 * Returned by a Bison action in order to stop the parsing process and
345 * return failure (<tt>false</tt>). */
346 public static final int YYABORT = 1;
347
348 /**
349 * Returned by a Bison action in order to start error recovery without
350 * printing an error message. */
351 public static final int YYERROR = 2;
352
353 // Internal return codes that are not supported for user semantic
354 // actions.
355 private static final int YYERRLAB = 3;
356 private static final int YYNEWSTATE = 4;
357 private static final int YYDEFAULT = 5;
358 private static final int YYREDUCE = 6;
359 private static final int YYERRLAB1 = 7;
360 private static final int YYRETURN = 8;
361
362 private int yyerrstatus_ = 0;
363
364 /**
365 * Return whether error recovery is being done. In this state, the parser
366 * reads token until it reaches a known state, and then restarts normal
367 * operation. */
368 public final boolean recovering ()
369 {
370 return yyerrstatus_ == 0;
371 }
372
373 private int yyaction (int yyn, YYStack yystack, int yylen) ]b4_maybe_throws([b4_throws])[
374 {
375 ]b4_yystype[ yyval;
376 ]b4_locations_if([b4_location_type[ yyloc = yylloc (yystack, yylen);]])[
377
378 /* If YYLEN is nonzero, implement the default value of the action:
379 `$$ = $1'. Otherwise, use the top of the stack.
380
381 Otherwise, the following line sets YYVAL to garbage.
382 This behavior is undocumented and Bison
383 users should not rely upon it. */
384 if (yylen > 0)
385 yyval = yystack.valueAt (yylen - 1);
386 else
387 yyval = yystack.valueAt (0);
388
389 yy_reduce_print (yyn, yystack);
390
391 switch (yyn)
392 {
393 ]b4_user_actions[
394 default: break;
395 }
396
397 yy_symbol_print ("-> $$ =", yyr1_[yyn], yyval]b4_locations_if([, yyloc])[);
398
399 yystack.pop (yylen);
400 yylen = 0;
401
402 /* Shift the result of the reduction. */
403 yyn = yyr1_[yyn];
404 int yystate = yypgoto_[yyn - yyntokens_] + yystack.stateAt (0);
405 if (0 <= yystate && yystate <= yylast_
406 && yycheck_[yystate] == yystack.stateAt (0))
407 yystate = yytable_[yystate];
408 else
409 yystate = yydefgoto_[yyn - yyntokens_];
410
411 yystack.push (yystate, yyval]b4_locations_if([, yyloc])[);
412 return YYNEWSTATE;
413 }
414
415 ]b4_error_verbose_if([[
416 /* Return YYSTR after stripping away unnecessary quotes and
417 backslashes, so that it's suitable for yyerror. The heuristic is
418 that double-quoting is unnecessary unless the string contains an
419 apostrophe, a comma, or backslash (other than backslash-backslash).
420 YYSTR is taken from yytname. */
421 private final String yytnamerr_ (String yystr)
422 {
423 if (yystr.charAt (0) == '"')
424 {
425 StringBuffer yyr = new StringBuffer ();
426 strip_quotes: for (int i = 1; i < yystr.length (); i++)
427 switch (yystr.charAt (i))
428 {
429 case '\'':
430 case ',':
431 break strip_quotes;
432
433 case '\\':
434 if (yystr.charAt(++i) != '\\')
435 break strip_quotes;
436 /* Fall through. */
437 default:
438 yyr.append (yystr.charAt (i));
439 break;
440
441 case '"':
442 return yyr.toString ();
443 }
444 }
445 else if (yystr.equals ("$end"))
446 return "end of input";
447
448 return yystr;
449 }
450 ]])[
451
452 /*--------------------------------.
453 | Print this symbol on YYOUTPUT. |
454 `--------------------------------*/
455
456 private void yy_symbol_print (String s, int yytype,
457 ]b4_yystype[ yyvaluep]dnl
458 b4_locations_if([, Object yylocationp])[)
459 {
460 if (yydebug > 0)
461 yycdebug (s + (yytype < yyntokens_ ? " token " : " nterm ")
462 + yytname_[yytype] + " ("]b4_locations_if([
463 + yylocationp + ": "])[
464 + (yyvaluep == null ? "(null)" : yyvaluep.toString ()) + ")");
465 }
466
467 /**
468 * Parse input from the scanner that was specified at object construction
469 * time. Return whether the end of the input was reached successfully.
470 *
471 * @@return <tt>true</tt> if the parsing succeeds. Note that this does not
472 * imply that there were no syntax errors.
473 */
474 public boolean parse () ]b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])[
475 {
476 /// Lookahead and lookahead in internal form.
477 int yychar = yyempty_;
478 int yytoken = 0;
479
480 /* State. */
481 int yyn = 0;
482 int yylen = 0;
483 int yystate = 0;
484
485 YYStack yystack = new YYStack ();
486
487 /* Error handling. */
488 int yynerrs_ = 0;
489 ]b4_locations_if([/// The location where the error started.
490 ]b4_location_type[ yyerrloc = null;
491
492 /// ]b4_location_type[ of the lookahead.
493 ]b4_location_type[ yylloc = new ]b4_location_type[ (null, null);
494
495 /// @@$.
496 ]b4_location_type[ yyloc;])
497
498 /// Semantic value of the lookahead.
499 b4_yystype[ yylval = null;
500
501 int yyresult;
502
503 yycdebug ("Starting parse\n");
504 yyerrstatus_ = 0;
505
506 ]m4_ifdef([b4_initial_action], [
507 m4_pushdef([b4_at_dollar], [yylloc])dnl
508 m4_pushdef([b4_dollar_dollar], [yylval])dnl
509 /* User initialization code. */
510 b4_user_initial_action
511 m4_popdef([b4_dollar_dollar])dnl
512 m4_popdef([b4_at_dollar])])dnl
513
514 [ /* Initialize the stack. */
515 yystack.push (yystate, yylval]b4_locations_if([, yylloc])[);
516
517 int label = YYNEWSTATE;
518 for (;;)
519 switch (label)
520 {
521 /* New state. Unlike in the C/C++ skeletons, the state is already
522 pushed when we come here. */
523 case YYNEWSTATE:
524 yycdebug ("Entering state " + yystate + "\n");
525 if (yydebug > 0)
526 yystack.print (yyDebugStream);
527
528 /* Accept? */
529 if (yystate == yyfinal_)
530 return true;
531
532 /* Take a decision. First try without lookahead. */
533 yyn = yypact_[yystate];
534 if (yy_pact_value_is_default_ (yyn))
535 {
536 label = YYDEFAULT;
537 break;
538 }
539
540 /* Read a lookahead token. */
541 if (yychar == yyempty_)
542 {
543 yycdebug ("Reading a token: ");
544 yychar = yylexer.yylex ();]
545 b4_locations_if([[
546 yylloc = new ]b4_location_type[(yylexer.getStartPos (),
547 yylexer.getEndPos ());]])
548 yylval = yylexer.getLVal ();[
549 }
550
551 /* Convert token to internal form. */
552 if (yychar <= Lexer.EOF)
553 {
554 yychar = yytoken = Lexer.EOF;
555 yycdebug ("Now at end of input.\n");
556 }
557 else
558 {
559 yytoken = yytranslate_ (yychar);
560 yy_symbol_print ("Next token is", yytoken,
561 yylval]b4_locations_if([, yylloc])[);
562 }
563
564 /* If the proper action on seeing token YYTOKEN is to reduce or to
565 detect an error, take that action. */
566 yyn += yytoken;
567 if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yytoken)
568 label = YYDEFAULT;
569
570 /* <= 0 means reduce or error. */
571 else if ((yyn = yytable_[yyn]) <= 0)
572 {
573 if (yy_table_value_is_error_ (yyn))
574 label = YYERRLAB;
575 else
576 {
577 yyn = -yyn;
578 label = YYREDUCE;
579 }
580 }
581
582 else
583 {
584 /* Shift the lookahead token. */
585 yy_symbol_print ("Shifting", yytoken,
586 yylval]b4_locations_if([, yylloc])[);
587
588 /* Discard the token being shifted. */
589 yychar = yyempty_;
590
591 /* Count tokens shifted since error; after three, turn off error
592 status. */
593 if (yyerrstatus_ > 0)
594 --yyerrstatus_;
595
596 yystate = yyn;
597 yystack.push (yystate, yylval]b4_locations_if([, yylloc])[);
598 label = YYNEWSTATE;
599 }
600 break;
601
602 /*-----------------------------------------------------------.
603 | yydefault -- do the default action for the current state. |
604 `-----------------------------------------------------------*/
605 case YYDEFAULT:
606 yyn = yydefact_[yystate];
607 if (yyn == 0)
608 label = YYERRLAB;
609 else
610 label = YYREDUCE;
611 break;
612
613 /*-----------------------------.
614 | yyreduce -- Do a reduction. |
615 `-----------------------------*/
616 case YYREDUCE:
617 yylen = yyr2_[yyn];
618 label = yyaction (yyn, yystack, yylen);
619 yystate = yystack.stateAt (0);
620 break;
621
622 /*------------------------------------.
623 | yyerrlab -- here on detecting error |
624 `------------------------------------*/
625 case YYERRLAB:
626 /* If not already recovering from an error, report this error. */
627 if (yyerrstatus_ == 0)
628 {
629 ++yynerrs_;
630 yyerror (]b4_locations_if([yylloc, ])[yysyntax_error (yystate, yytoken));
631 }
632
633 ]b4_locations_if([yyerrloc = yylloc;])[
634 if (yyerrstatus_ == 3)
635 {
636 /* If just tried and failed to reuse lookahead token after an
637 error, discard it. */
638
639 if (yychar <= Lexer.EOF)
640 {
641 /* Return failure if at end of input. */
642 if (yychar == Lexer.EOF)
643 return false;
644 }
645 else
646 yychar = yyempty_;
647 }
648
649 /* Else will try to reuse lookahead token after shifting the error
650 token. */
651 label = YYERRLAB1;
652 break;
653
654 /*---------------------------------------------------.
655 | errorlab -- error raised explicitly by YYERROR. |
656 `---------------------------------------------------*/
657 case YYERROR:
658
659 ]b4_locations_if([yyerrloc = yystack.locationAt (yylen - 1);])[
660 /* Do not reclaim the symbols of the rule which action triggered
661 this YYERROR. */
662 yystack.pop (yylen);
663 yylen = 0;
664 yystate = yystack.stateAt (0);
665 label = YYERRLAB1;
666 break;
667
668 /*-------------------------------------------------------------.
669 | yyerrlab1 -- common code for both syntax error and YYERROR. |
670 `-------------------------------------------------------------*/
671 case YYERRLAB1:
672 yyerrstatus_ = 3; /* Each real token shifted decrements this. */
673
674 for (;;)
675 {
676 yyn = yypact_[yystate];
677 if (!yy_pact_value_is_default_ (yyn))
678 {
679 yyn += yyterror_;
680 if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_)
681 {
682 yyn = yytable_[yyn];
683 if (0 < yyn)
684 break;
685 }
686 }
687
688 /* Pop the current state because it cannot handle the error token. */
689 if (yystack.height == 1)
690 return false;
691
692 ]b4_locations_if([yyerrloc = yystack.locationAt (0);])[
693 yystack.pop ();
694 yystate = yystack.stateAt (0);
695 if (yydebug > 0)
696 yystack.print (yyDebugStream);
697 }
698
699 ]b4_locations_if([
700 /* Muck with the stack to setup for yylloc. */
701 yystack.push (0, null, yylloc);
702 yystack.push (0, null, yyerrloc);
703 yyloc = yylloc (yystack, 2);
704 yystack.pop (2);])[
705
706 /* Shift the error token. */
707 yy_symbol_print ("Shifting", yystos_[yyn],
708 yylval]b4_locations_if([, yyloc])[);
709
710 yystate = yyn;
711 yystack.push (yyn, yylval]b4_locations_if([, yyloc])[);
712 label = YYNEWSTATE;
713 break;
714
715 /* Accept. */
716 case YYACCEPT:
717 return true;
718
719 /* Abort. */
720 case YYABORT:
721 return false;
722 }
723 }
724
725 // Generate an error message.
726 private String yysyntax_error (int yystate, int tok)
727 {]b4_error_verbose_if([[
728 if (yyErrorVerbose)
729 {
730 int yyn = yypact_[yystate];
731 if (yypact_ninf_ < yyn && yyn <= yylast_)
732 {
733 StringBuffer res;
734
735 /* Start YYX at -YYN if negative to avoid negative indexes in
736 YYCHECK. In other words, skip the first -YYN actions for this
737 state because they are default actions. */
738 int yyxbegin = yyn < 0 ? -yyn : 0;
739
740 /* Stay within bounds of both yycheck and yytname. */
741 int yychecklim = yylast_ - yyn + 1;
742 int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
743 int count = 0;
744 for (int x = yyxbegin; x < yyxend; ++x)
745 if (yycheck_[x + yyn] == x && x != yyterror_
746 && !yy_table_value_is_error_ (yytable_[x + yyn]))
747 ++count;
748
749 // FIXME: This method of building the message is not compatible
750 // with internationalization.
751 res = new StringBuffer ("syntax error, unexpected ");
752 res.append (yytnamerr_ (yytname_[tok]));
753 if (count < 5)
754 {
755 count = 0;
756 for (int x = yyxbegin; x < yyxend; ++x)
757 if (yycheck_[x + yyn] == x && x != yyterror_
758 && !yy_table_value_is_error_ (yytable_[x + yyn]))
759 {
760 res.append (count++ == 0 ? ", expecting " : " or ");
761 res.append (yytnamerr_ (yytname_[x]));
762 }
763 }
764 return res.toString ();
765 }
766 }
767 ]])[
768 return "syntax error";
769 }
770
771 /**
772 * Whether the given <code>yypact_</code> value indicates a defaulted state.
773 * @@param yyvalue the value to check
774 */
775 private static boolean yy_pact_value_is_default_ (int yyvalue)
776 {
777 return yyvalue == yypact_ninf_;
778 }
779
780 /**
781 * Whether the given <code>yytable_</code> value indicates a syntax error.
782 * @@param yyvalue the value to check
783 */
784 private static boolean yy_table_value_is_error_ (int yyvalue)
785 {
786 return yyvalue == yytable_ninf_;
787 }
788
789 private static final ]b4_int_type_for([b4_pact])[ yypact_ninf_ = ]b4_pact_ninf[;
790 private static final ]b4_int_type_for([b4_table])[ yytable_ninf_ = ]b4_table_ninf[;
791
792 ]b4_parser_tables_define[
793 ]b4_integral_parser_table_define([token_number], [b4_toknum],
794 [TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding
795 to YYLEX-NUM.])[
796
797 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
798 First, the terminals, then, starting at \a yyntokens_, nonterminals. */
799 ]b4_typed_parser_table_define([String], [tname], [b4_tname])[
800
801 ]b4_integral_parser_table_define([rline], [b4_rline],
802 [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[
803
804 // Report on the debug stream that the rule yyrule is going to be reduced.
805 private void yy_reduce_print (int yyrule, YYStack yystack)
806 {
807 if (yydebug == 0)
808 return;
809
810 int yylno = yyrline_[yyrule];
811 int yynrhs = yyr2_[yyrule];
812 /* Print the symbols being reduced, and their result. */
813 yycdebug ("Reducing stack by rule " + (yyrule - 1)
814 + " (line " + yylno + "), ");
815
816 /* The symbols being reduced. */
817 for (int yyi = 0; yyi < yynrhs; yyi++)
818 yy_symbol_print (" $" + (yyi + 1) + " =",
819 yystos_[yystack.stateAt(yyi + 1 - yynrhs)],
820 ]b4_rhs_value(yynrhs, yyi + 1)b4_locations_if([,
821 b4_rhs_location(yynrhs, yyi + 1)])[);
822 }
823
824 /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */
825 ]b4_integral_parser_table_define([translate_table], [b4_translate])[
826
827 private static final ]b4_int_type_for([b4_translate])[ yytranslate_ (int t)
828 {
829 if (t >= 0 && t <= yyuser_token_number_max_)
830 return yytranslate_table_[t];
831 else
832 return yyundef_token_;
833 }
834
835 private static final int yylast_ = ]b4_last[;
836 private static final int yynnts_ = ]b4_nterms_number[;
837 private static final int yyempty_ = -2;
838 private static final int yyfinal_ = ]b4_final_state_number[;
839 private static final int yyterror_ = 1;
840 private static final int yyerrcode_ = 256;
841 private static final int yyntokens_ = ]b4_tokens_number[;
842
843 private static final int yyuser_token_number_max_ = ]b4_user_token_number_max[;
844 private static final int yyundef_token_ = ]b4_undef_token_number[;
845
846 ]/* User implementation code. */
847 b4_percent_code_get[]dnl
848
849 }
850
851 b4_epilogue[]dnl
852 m4_divert_pop(0)dnl