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1 # Java skeleton for Bison -*- autoconf -*-
2
3 # Copyright (C) 2007, 2008, 2009 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, 2008, 2009])
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 /**
354 * Returned by a Bison action in order to print an error message and start
355 * error recovery. Formally deprecated in Bison 2.4.2's NEWS entry, where
356 * a plan to phase it out is discussed. */
357 public static final int YYFAIL = 3;
358
359 private static final int YYNEWSTATE = 4;
360 private static final int YYDEFAULT = 5;
361 private static final int YYREDUCE = 6;
362 private static final int YYERRLAB1 = 7;
363 private static final int YYRETURN = 8;
364
365 private int yyerrstatus_ = 0;
366
367 /**
368 * Return whether error recovery is being done. In this state, the parser
369 * reads token until it reaches a known state, and then restarts normal
370 * operation. */
371 public final boolean recovering ()
372 {
373 return yyerrstatus_ == 0;
374 }
375
376 private int yyaction (int yyn, YYStack yystack, int yylen) ]b4_maybe_throws([b4_throws])[
377 {
378 ]b4_yystype[ yyval;
379 ]b4_locations_if([b4_location_type[ yyloc = yylloc (yystack, yylen);]])[
380
381 /* If YYLEN is nonzero, implement the default value of the action:
382 `$$ = $1'. Otherwise, use the top of the stack.
383
384 Otherwise, the following line sets YYVAL to garbage.
385 This behavior is undocumented and Bison
386 users should not rely upon it. */
387 if (yylen > 0)
388 yyval = yystack.valueAt (yylen - 1);
389 else
390 yyval = yystack.valueAt (0);
391
392 yy_reduce_print (yyn, yystack);
393
394 switch (yyn)
395 {
396 ]b4_user_actions[
397 default: break;
398 }
399
400 yy_symbol_print ("-> $$ =", yyr1_[yyn], yyval]b4_locations_if([, yyloc])[);
401
402 yystack.pop (yylen);
403 yylen = 0;
404
405 /* Shift the result of the reduction. */
406 yyn = yyr1_[yyn];
407 int yystate = yypgoto_[yyn - yyntokens_] + yystack.stateAt (0);
408 if (0 <= yystate && yystate <= yylast_
409 && yycheck_[yystate] == yystack.stateAt (0))
410 yystate = yytable_[yystate];
411 else
412 yystate = yydefgoto_[yyn - yyntokens_];
413
414 yystack.push (yystate, yyval]b4_locations_if([, yyloc])[);
415 return YYNEWSTATE;
416 }
417
418 ]b4_error_verbose_if([[
419 /* Return YYSTR after stripping away unnecessary quotes and
420 backslashes, so that it's suitable for yyerror. The heuristic is
421 that double-quoting is unnecessary unless the string contains an
422 apostrophe, a comma, or backslash (other than backslash-backslash).
423 YYSTR is taken from yytname. */
424 private final String yytnamerr_ (String yystr)
425 {
426 if (yystr.charAt (0) == '"')
427 {
428 StringBuffer yyr = new StringBuffer ();
429 strip_quotes: for (int i = 1; i < yystr.length (); i++)
430 switch (yystr.charAt (i))
431 {
432 case '\'':
433 case ',':
434 break strip_quotes;
435
436 case '\\':
437 if (yystr.charAt(++i) != '\\')
438 break strip_quotes;
439 /* Fall through. */
440 default:
441 yyr.append (yystr.charAt (i));
442 break;
443
444 case '"':
445 return yyr.toString ();
446 }
447 }
448 else if (yystr.equals ("$end"))
449 return "end of input";
450
451 return yystr;
452 }
453 ]])[
454
455 /*--------------------------------.
456 | Print this symbol on YYOUTPUT. |
457 `--------------------------------*/
458
459 private void yy_symbol_print (String s, int yytype,
460 ]b4_yystype[ yyvaluep]dnl
461 b4_locations_if([, Object yylocationp])[)
462 {
463 if (yydebug > 0)
464 yycdebug (s + (yytype < yyntokens_ ? " token " : " nterm ")
465 + yytname_[yytype] + " ("]b4_locations_if([
466 + yylocationp + ": "])[
467 + (yyvaluep == null ? "(null)" : yyvaluep.toString ()) + ")");
468 }
469
470 /**
471 * Parse input from the scanner that was specified at object construction
472 * time. Return whether the end of the input was reached successfully.
473 *
474 * @@return <tt>true</tt> if the parsing succeeds. Note that this does not
475 * imply that there were no syntax errors.
476 */
477 public boolean parse () ]b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])[
478 {
479 /// Lookahead and lookahead in internal form.
480 int yychar = yyempty_;
481 int yytoken = 0;
482
483 /* State. */
484 int yyn = 0;
485 int yylen = 0;
486 int yystate = 0;
487
488 YYStack yystack = new YYStack ();
489
490 /* Error handling. */
491 int yynerrs_ = 0;
492 ]b4_locations_if([/// The location where the error started.
493 ]b4_location_type[ yyerrloc = null;
494
495 /// ]b4_location_type[ of the lookahead.
496 ]b4_location_type[ yylloc = new ]b4_location_type[ (null, null);
497
498 /// @@$.
499 ]b4_location_type[ yyloc;])
500
501 /// Semantic value of the lookahead.
502 b4_yystype[ yylval = null;
503
504 int yyresult;
505
506 yycdebug ("Starting parse\n");
507 yyerrstatus_ = 0;
508
509 ]m4_ifdef([b4_initial_action], [
510 m4_pushdef([b4_at_dollar], [yylloc])dnl
511 m4_pushdef([b4_dollar_dollar], [yylval])dnl
512 /* User initialization code. */
513 b4_user_initial_action
514 m4_popdef([b4_dollar_dollar])dnl
515 m4_popdef([b4_at_dollar])])dnl
516
517 [ /* Initialize the stack. */
518 yystack.push (yystate, yylval]b4_locations_if([, yylloc])[);
519
520 int label = YYNEWSTATE;
521 for (;;)
522 switch (label)
523 {
524 /* New state. Unlike in the C/C++ skeletons, the state is already
525 pushed when we come here. */
526 case YYNEWSTATE:
527 yycdebug ("Entering state " + yystate + "\n");
528 if (yydebug > 0)
529 yystack.print (yyDebugStream);
530
531 /* Accept? */
532 if (yystate == yyfinal_)
533 return true;
534
535 /* Take a decision. First try without lookahead. */
536 yyn = yypact_[yystate];
537 if (yy_pact_value_is_default_ (yyn))
538 {
539 label = YYDEFAULT;
540 break;
541 }
542
543 /* Read a lookahead token. */
544 if (yychar == yyempty_)
545 {
546 yycdebug ("Reading a token: ");
547 yychar = yylexer.yylex ();]
548 b4_locations_if([[
549 yylloc = new ]b4_location_type[(yylexer.getStartPos (),
550 yylexer.getEndPos ());]])
551 yylval = yylexer.getLVal ();[
552 }
553
554 /* Convert token to internal form. */
555 if (yychar <= Lexer.EOF)
556 {
557 yychar = yytoken = Lexer.EOF;
558 yycdebug ("Now at end of input.\n");
559 }
560 else
561 {
562 yytoken = yytranslate_ (yychar);
563 yy_symbol_print ("Next token is", yytoken,
564 yylval]b4_locations_if([, yylloc])[);
565 }
566
567 /* If the proper action on seeing token YYTOKEN is to reduce or to
568 detect an error, take that action. */
569 yyn += yytoken;
570 if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yytoken)
571 label = YYDEFAULT;
572
573 /* <= 0 means reduce or error. */
574 else if ((yyn = yytable_[yyn]) <= 0)
575 {
576 if (yy_table_value_is_error_ (yyn))
577 label = YYFAIL;
578 else
579 {
580 yyn = -yyn;
581 label = YYREDUCE;
582 }
583 }
584
585 else
586 {
587 /* Shift the lookahead token. */
588 yy_symbol_print ("Shifting", yytoken,
589 yylval]b4_locations_if([, yylloc])[);
590
591 /* Discard the token being shifted. */
592 yychar = yyempty_;
593
594 /* Count tokens shifted since error; after three, turn off error
595 status. */
596 if (yyerrstatus_ > 0)
597 --yyerrstatus_;
598
599 yystate = yyn;
600 yystack.push (yystate, yylval]b4_locations_if([, yylloc])[);
601 label = YYNEWSTATE;
602 }
603 break;
604
605 /*-----------------------------------------------------------.
606 | yydefault -- do the default action for the current state. |
607 `-----------------------------------------------------------*/
608 case YYDEFAULT:
609 yyn = yydefact_[yystate];
610 if (yyn == 0)
611 label = YYFAIL;
612 else
613 label = YYREDUCE;
614 break;
615
616 /*-----------------------------.
617 | yyreduce -- Do a reduction. |
618 `-----------------------------*/
619 case YYREDUCE:
620 yylen = yyr2_[yyn];
621 label = yyaction (yyn, yystack, yylen);
622 yystate = yystack.stateAt (0);
623 break;
624
625 /*------------------------------------.
626 | yyerrlab -- here on detecting error |
627 `------------------------------------*/
628 case YYFAIL:
629 /* If not already recovering from an error, report this error. */
630 if (yyerrstatus_ == 0)
631 {
632 ++yynerrs_;
633 yyerror (]b4_locations_if([yylloc, ])[yysyntax_error (yystate, yytoken));
634 }
635
636 ]b4_locations_if([yyerrloc = yylloc;])[
637 if (yyerrstatus_ == 3)
638 {
639 /* If just tried and failed to reuse lookahead token after an
640 error, discard it. */
641
642 if (yychar <= Lexer.EOF)
643 {
644 /* Return failure if at end of input. */
645 if (yychar == Lexer.EOF)
646 return false;
647 }
648 else
649 yychar = yyempty_;
650 }
651
652 /* Else will try to reuse lookahead token after shifting the error
653 token. */
654 label = YYERRLAB1;
655 break;
656
657 /*---------------------------------------------------.
658 | errorlab -- error raised explicitly by YYERROR. |
659 `---------------------------------------------------*/
660 case YYERROR:
661
662 ]b4_locations_if([yyerrloc = yystack.locationAt (yylen - 1);])[
663 /* Do not reclaim the symbols of the rule which action triggered
664 this YYERROR. */
665 yystack.pop (yylen);
666 yylen = 0;
667 yystate = yystack.stateAt (0);
668 label = YYERRLAB1;
669 break;
670
671 /*-------------------------------------------------------------.
672 | yyerrlab1 -- common code for both syntax error and YYERROR. |
673 `-------------------------------------------------------------*/
674 case YYERRLAB1:
675 yyerrstatus_ = 3; /* Each real token shifted decrements this. */
676
677 for (;;)
678 {
679 yyn = yypact_[yystate];
680 if (!yy_pact_value_is_default_ (yyn))
681 {
682 yyn += yyterror_;
683 if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_)
684 {
685 yyn = yytable_[yyn];
686 if (0 < yyn)
687 break;
688 }
689 }
690
691 /* Pop the current state because it cannot handle the error token. */
692 if (yystack.height == 1)
693 return false;
694
695 ]b4_locations_if([yyerrloc = yystack.locationAt (0);])[
696 yystack.pop ();
697 yystate = yystack.stateAt (0);
698 if (yydebug > 0)
699 yystack.print (yyDebugStream);
700 }
701
702 ]b4_locations_if([
703 /* Muck with the stack to setup for yylloc. */
704 yystack.push (0, null, yylloc);
705 yystack.push (0, null, yyerrloc);
706 yyloc = yylloc (yystack, 2);
707 yystack.pop (2);])[
708
709 /* Shift the error token. */
710 yy_symbol_print ("Shifting", yystos_[yyn],
711 yylval]b4_locations_if([, yyloc])[);
712
713 yystate = yyn;
714 yystack.push (yyn, yylval]b4_locations_if([, yyloc])[);
715 label = YYNEWSTATE;
716 break;
717
718 /* Accept. */
719 case YYACCEPT:
720 return true;
721
722 /* Abort. */
723 case YYABORT:
724 return false;
725 }
726 }
727
728 // Generate an error message.
729 private String yysyntax_error (int yystate, int tok)
730 {]b4_error_verbose_if([[
731 if (yyErrorVerbose)
732 {
733 int yyn = yypact_[yystate];
734 if (yypact_ninf_ < yyn && yyn <= yylast_)
735 {
736 StringBuffer res;
737
738 /* Start YYX at -YYN if negative to avoid negative indexes in
739 YYCHECK. In other words, skip the first -YYN actions for this
740 state because they are default actions. */
741 int yyxbegin = yyn < 0 ? -yyn : 0;
742
743 /* Stay within bounds of both yycheck and yytname. */
744 int yychecklim = yylast_ - yyn + 1;
745 int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
746 int count = 0;
747 for (int x = yyxbegin; x < yyxend; ++x)
748 if (yycheck_[x + yyn] == x && x != yyterror_
749 && !yy_table_value_is_error_ (yytable_[x + yyn]))
750 ++count;
751
752 // FIXME: This method of building the message is not compatible
753 // with internationalization.
754 res = new StringBuffer ("syntax error, unexpected ");
755 res.append (yytnamerr_ (yytname_[tok]));
756 if (count < 5)
757 {
758 count = 0;
759 for (int x = yyxbegin; x < yyxend; ++x)
760 if (yycheck_[x + yyn] == x && x != yyterror_
761 && !yy_table_value_is_error_ (yytable_[x + yyn]))
762 {
763 res.append (count++ == 0 ? ", expecting " : " or ");
764 res.append (yytnamerr_ (yytname_[x]));
765 }
766 }
767 return res.toString ();
768 }
769 }
770 ]])[
771 return "syntax error";
772 }
773
774 /**
775 * Whether the given <code>yypact_</code> value indicates a defaulted state.
776 * @@param yyvalue the value to check
777 */
778 private static boolean yy_pact_value_is_default_ (int yyvalue)
779 {
780 return yyvalue == yypact_ninf_;
781 }
782
783 /**
784 * Whether the given <code>yytable_</code> value indicates a syntax error.
785 * @@param yyvalue the value to check
786 */
787 private static boolean yy_table_value_is_error_ (int yyvalue)
788 {
789 return yyvalue == yytable_ninf_;
790 }
791
792 private static final ]b4_int_type_for([b4_pact])[ yypact_ninf_ = ]b4_pact_ninf[;
793 private static final ]b4_int_type_for([b4_table])[ yytable_ninf_ = ]b4_table_ninf[;
794
795 ]b4_parser_tables_define[
796 ]b4_integral_parser_table_define([token_number], [b4_toknum],
797 [TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding
798 to YYLEX-NUM.])[
799
800 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
801 First, the terminals, then, starting at \a yyntokens_, nonterminals. */
802 ]b4_typed_parser_table_define([String], [tname], [b4_tname])[
803
804 ]b4_integral_parser_table_define([rline], [b4_rline],
805 [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[
806
807 // Report on the debug stream that the rule yyrule is going to be reduced.
808 private void yy_reduce_print (int yyrule, YYStack yystack)
809 {
810 if (yydebug == 0)
811 return;
812
813 int yylno = yyrline_[yyrule];
814 int yynrhs = yyr2_[yyrule];
815 /* Print the symbols being reduced, and their result. */
816 yycdebug ("Reducing stack by rule " + (yyrule - 1)
817 + " (line " + yylno + "), ");
818
819 /* The symbols being reduced. */
820 for (int yyi = 0; yyi < yynrhs; yyi++)
821 yy_symbol_print (" $" + (yyi + 1) + " =",
822 yystos_[yystack.stateAt(yyi + 1 - yynrhs)],
823 ]b4_rhs_value(yynrhs, yyi + 1)b4_locations_if([,
824 b4_rhs_location(yynrhs, yyi + 1)])[);
825 }
826
827 /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */
828 ]b4_integral_parser_table_define([translate_table], [b4_translate])[
829
830 private static final ]b4_int_type_for([b4_translate])[ yytranslate_ (int t)
831 {
832 if (t >= 0 && t <= yyuser_token_number_max_)
833 return yytranslate_table_[t];
834 else
835 return yyundef_token_;
836 }
837
838 private static final int yylast_ = ]b4_last[;
839 private static final int yynnts_ = ]b4_nterms_number[;
840 private static final int yyempty_ = -2;
841 private static final int yyfinal_ = ]b4_final_state_number[;
842 private static final int yyterror_ = 1;
843 private static final int yyerrcode_ = 256;
844 private static final int yyntokens_ = ]b4_tokens_number[;
845
846 private static final int yyuser_token_number_max_ = ]b4_user_token_number_max[;
847 private static final int yyundef_token_ = ]b4_undef_token_number[;
848
849 ]/* User implementation code. */
850 b4_percent_code_get[]dnl
851
852 }
853
854 b4_epilogue[]dnl
855 m4_divert_pop(0)dnl