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8405b70c PB |
1 | # Java skeleton for Bison -*- autoconf -*- |
2 | ||
74d6c0fe | 3 | # Copyright (C) 2007, 2008 Free Software Foundation, Inc. |
8405b70c | 4 | |
f16b0819 | 5 | # This program is free software: you can redistribute it and/or modify |
8405b70c | 6 | # it under the terms of the GNU General Public License as published by |
f16b0819 | 7 | # the Free Software Foundation, either version 3 of the License, or |
8405b70c | 8 | # (at your option) any later version. |
f16b0819 | 9 | # |
8405b70c PB |
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. | |
f16b0819 | 14 | # |
8405b70c | 15 | # You should have received a copy of the GNU General Public License |
f16b0819 | 16 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
8405b70c PB |
17 | |
18 | m4_include(b4_pkgdatadir/[java.m4]) | |
19 | ||
20 | b4_defines_if([b4_fatal([%s: %%defines does not make sense in Java], [b4_skeleton])]) | |
21 | m4_ifval(m4_defn([b4_symbol_destructors]), | |
22 | [b4_fatal([%s: %%destructor does not make sense in Java], [b4_skeleton])], | |
23 | []) | |
24 | ||
25 | m4_divert_push(0)dnl | |
a0d4650a | 26 | @output(b4_parser_file_name@)@ |
8405b70c | 27 | b4_copyright([Skeleton implementation for Bison LALR(1) parsers in Java], |
74d6c0fe | 28 | [2007, 2008]) |
8405b70c PB |
29 | |
30 | b4_percent_define_ifdef([package], [package b4_percent_define_get([package]); | |
31 | ])[/* First part of user declarations. */ | |
1979121c DJ |
32 | ]b4_user_pre_prologue |
33 | b4_user_post_prologue | |
8405b70c PB |
34 | b4_percent_code_get([[imports]]) |
35 | [/** | |
74d6c0fe | 36 | * A Bison parser, automatically generated from <tt>]m4_bpatsubst(b4_file_name, [^"\(.*\)"$], [\1])[</tt>. |
8405b70c PB |
37 | * |
38 | * @@author LALR (1) parser skeleton written by Paolo Bonzini. | |
39 | */ | |
1979121c DJ |
40 | ]b4_percent_define_get3([annotations], [], [ ])dnl |
41 | b4_public_if([public ])dnl | |
e254a580 DJ |
42 | b4_abstract_if([abstract ])dnl |
43 | b4_final_if([final ])dnl | |
44 | b4_strictfp_if([strictfp ])dnl | |
45 | [class ]b4_parser_class_name[]dnl | |
46 | b4_percent_define_get3([extends], [ extends ])dnl | |
47 | b4_percent_define_get3([implements], [ implements ])[ | |
8405b70c PB |
48 | { |
49 | ]b4_identification[ | |
1979121c | 50 | ]b4_error_verbose_if([[ |
8405b70c | 51 | /** True if verbose error messages are enabled. */ |
1979121c DJ |
52 | private boolean yyErrorVerbose = true; |
53 | ||
54 | /** | |
55 | * Return whether verbose error messages are enabled. | |
56 | */ | |
57 | public final boolean getErrorVerbose() { return yyErrorVerbose; } | |
58 | ||
59 | /** | |
60 | * Set the verbosity of error messages. | |
61 | * @@param verbose True to request verbose error messages. | |
62 | */ | |
63 | public final void setErrorVerbose(boolean verbose) | |
64 | { yyErrorVerbose = verbose; } | |
65 | ]]) | |
8405b70c PB |
66 | |
67 | b4_locations_if([[ | |
68 | /** | |
69 | * A class defining a pair of positions. Positions, defined by the | |
70 | * <code>]b4_position_type[</code> class, denote a point in the input. | |
71 | * Locations represent a part of the input through the beginning | |
72 | * and ending positions. */ | |
73 | public class ]b4_location_type[ { | |
74 | /** The first, inclusive, position in the range. */ | |
75 | public ]b4_position_type[ begin; | |
76 | ||
77 | /** The first position beyond the range. */ | |
78 | public ]b4_position_type[ end; | |
79 | ||
80 | /** | |
e254a580 | 81 | * Create a <code>]b4_location_type[</code> denoting an empty range located at |
8405b70c PB |
82 | * a given point. |
83 | * @@param loc The position at which the range is anchored. */ | |
84 | public ]b4_location_type[ (]b4_position_type[ loc) { | |
85 | this.begin = this.end = loc; | |
86 | } | |
87 | ||
88 | /** | |
89 | * Create a <code>]b4_location_type[</code> from the endpoints of the range. | |
90 | * @@param begin The first position included in the range. | |
74d6c0fe | 91 | * @@param end The first position beyond the range. */ |
8405b70c PB |
92 | public ]b4_location_type[ (]b4_position_type[ begin, ]b4_position_type[ end) { |
93 | this.begin = begin; | |
94 | this.end = end; | |
95 | } | |
96 | ||
97 | /** | |
98 | * Print a representation of the location. For this to be correct, | |
99 | * <code>]b4_position_type[</code> should override the <code>equals</code> | |
100 | * method. */ | |
101 | public String toString () { | |
102 | if (begin.equals (end)) | |
103 | return begin.toString (); | |
104 | else | |
105 | return begin.toString () + "-" + end.toString (); | |
106 | } | |
107 | } | |
108 | ||
109 | ]]) | |
110 | ||
8405b70c | 111 | b4_locations_if([[ |
d3b12988 | 112 | private ]b4_location_type[ yylloc (YYStack rhs, int n) |
8405b70c PB |
113 | { |
114 | if (n > 0) | |
115 | return new ]b4_location_type[ (rhs.locationAt (1).begin, rhs.locationAt (n).end); | |
116 | else | |
117 | return new ]b4_location_type[ (rhs.locationAt (0).end); | |
74d6c0fe | 118 | }]])[ |
8405b70c | 119 | |
01b477c6 | 120 | /** |
8405b70c PB |
121 | * Communication interface between the scanner and the Bison-generated |
122 | * parser <tt>]b4_parser_class_name[</tt>. | |
123 | */ | |
124 | public interface Lexer { | |
1979121c DJ |
125 | /** Token returned by the scanner to signal the end of its input. */ |
126 | public static final int EOF = 0; | |
127 | ||
128 | ]b4_token_enums(b4_tokens)[ | |
129 | ||
8405b70c PB |
130 | ]b4_locations_if([[/** |
131 | * Method to retrieve the beginning position of the last scanned token. | |
132 | * @@return the position at which the last scanned token starts. */ | |
133 | ]b4_position_type[ getStartPos (); | |
134 | ||
135 | /** | |
136 | * Method to retrieve the ending position of the last scanned token. | |
137 | * @@return the first position beyond the last scanned token. */ | |
138 | ]b4_position_type[ getEndPos ();]])[ | |
139 | ||
140 | /** | |
141 | * Method to retrieve the semantic value of the last scanned token. | |
142 | * @@return the semantic value of the last scanned token. */ | |
d0ee4105 | 143 | ]b4_yystype[ getLVal (); |
8405b70c PB |
144 | |
145 | /** | |
8405b70c | 146 | * Entry point for the scanner. Returns the token identifier corresponding |
d0ee4105 | 147 | * to the next token and prepares to return the semantic value |
a0d4650a | 148 | * ]b4_locations_if([and beginning/ending positions ])[of the token. |
8405b70c | 149 | * @@return the token identifier corresponding to the next token. */ |
01b477c6 | 150 | int yylex () ]b4_maybe_throws([b4_lex_throws])[; |
8405b70c PB |
151 | |
152 | /** | |
153 | * Entry point for error reporting. Emits an error | |
e254a580 | 154 | * ]b4_locations_if([referring to the given location ])[in a user-defined way. |
8405b70c | 155 | * |
74d6c0fe | 156 | * ]b4_locations_if([[@@param loc The location of the element to which the |
8405b70c | 157 | * error message is related]])[ |
1979121c DJ |
158 | * @@param msg The string for the error message. */ |
159 | void yyerror (]b4_locations_if([b4_location_type[ loc, ]])[String msg);] | |
01b477c6 PB |
160 | } |
161 | ||
162 | b4_lexer_if([[private class YYLexer implements Lexer { | |
163 | ]b4_percent_code_get([[lexer]])[ | |
164 | } | |
8405b70c | 165 | |
01b477c6 PB |
166 | ]])[/** The object doing lexical analysis for us. */ |
167 | private Lexer yylexer; | |
168 | ] | |
169 | b4_parse_param_vars | |
8405b70c | 170 | |
01b477c6 | 171 | b4_lexer_if([[ |
8405b70c | 172 | /** |
01b477c6 | 173 | * Instantiates the Bison-generated parser. |
8405b70c | 174 | */ |
1979121c DJ |
175 | public ]b4_parser_class_name (b4_parse_param_decl([b4_lex_param_decl])[) ]b4_maybe_throws([b4_init_throws])[ |
176 | { | |
177 | ]b4_percent_code_get([[init]])[ | |
01b477c6 PB |
178 | this.yylexer = new YYLexer(]b4_lex_param_call[); |
179 | ]b4_parse_param_cons[ | |
180 | } | |
181 | ]]) | |
182 | ||
183 | /** | |
184 | * Instantiates the Bison-generated parser. | |
74d6c0fe | 185 | * @@param yylexer The scanner that will supply tokens to the parser. |
01b477c6 | 186 | */ |
1979121c DJ |
187 | b4_lexer_if([[protected]], [[public]]) b4_parser_class_name[ (]b4_parse_param_decl([[Lexer yylexer]])[) ]b4_maybe_throws([b4_init_throws])[ |
188 | { | |
189 | ]b4_percent_code_get([[init]])[ | |
01b477c6 PB |
190 | this.yylexer = yylexer; |
191 | ]b4_parse_param_cons[ | |
8405b70c PB |
192 | } |
193 | ||
d3b12988 | 194 | private java.io.PrintStream yyDebugStream = System.err; |
8405b70c PB |
195 | |
196 | /** | |
197 | * Return the <tt>PrintStream</tt> on which the debugging output is | |
198 | * printed. | |
199 | */ | |
d3b12988 | 200 | public final java.io.PrintStream getDebugStream () { return yyDebugStream; } |
8405b70c PB |
201 | |
202 | /** | |
203 | * Set the <tt>PrintStream</tt> on which the debug output is printed. | |
204 | * @@param s The stream that is used for debugging output. | |
205 | */ | |
d3b12988 | 206 | public final void setDebugStream(java.io.PrintStream s) { yyDebugStream = s; } |
8405b70c PB |
207 | |
208 | private int yydebug = 0; | |
209 | ||
210 | /** | |
211 | * Answer the verbosity of the debugging output; 0 means that all kinds of | |
212 | * output from the parser are suppressed. | |
213 | */ | |
214 | public final int getDebugLevel() { return yydebug; } | |
215 | ||
216 | /** | |
217 | * Set the verbosity of the debugging output; 0 means that all kinds of | |
218 | * output from the parser are suppressed. | |
219 | * @@param level The verbosity level for debugging output. | |
220 | */ | |
221 | public final void setDebugLevel(int level) { yydebug = level; } | |
222 | ||
1979121c DJ |
223 | /** |
224 | * Print an error message via the lexer. | |
225 | *]b4_locations_if([[ Use a <code>null</code> location.]])[ | |
226 | * @@param msg The error message. | |
227 | */ | |
228 | public final void yyerror (String msg) | |
229 | { | |
230 | yylexer.yyerror (]b4_locations_if([[(]b4_location_type[)null, ]])[msg); | |
8405b70c | 231 | } |
1979121c DJ |
232 | ]b4_locations_if([[ |
233 | /** | |
234 | * Print an error message via the lexer. | |
235 | * @@param loc The location associated with the message. | |
236 | * @@param msg The error message. | |
237 | */ | |
238 | public final void yyerror (]b4_location_type[ loc, String msg) | |
239 | { | |
240 | yylexer.yyerror (loc, msg); | |
01b477c6 PB |
241 | } |
242 | ||
1979121c DJ |
243 | /** |
244 | * Print an error message via the lexer. | |
245 | * @@param pos The position associated with the message. | |
246 | * @@param msg The error message. | |
247 | */ | |
248 | public final void yyerror (]b4_position_type[ pos, String msg) | |
249 | { | |
250 | yylexer.yyerror (new ]b4_location_type[ (pos), msg); | |
251 | }]]) | |
8405b70c PB |
252 | |
253 | [protected final void yycdebug (String s) { | |
254 | if (yydebug > 0) | |
d3b12988 | 255 | yyDebugStream.println (s); |
8405b70c PB |
256 | } |
257 | ||
d3b12988 | 258 | private final class YYStack { |
8405b70c PB |
259 | private int[] stateStack = new int[16]; |
260 | ]b4_locations_if([[private ]b4_location_type[[] locStack = new ]b4_location_type[[16];]])[ | |
01b477c6 | 261 | private ]b4_yystype[[] valueStack = new ]b4_yystype[[16]; |
8405b70c | 262 | |
8a93f8e6 PB |
263 | public int size = 16; |
264 | public int height = -1; | |
a0d4650a | 265 | |
01b477c6 | 266 | public final void push (int state, ]b4_yystype[ value]dnl |
11707b2b | 267 | b4_locations_if([, ]b4_location_type[ loc])[) { |
8405b70c | 268 | height++; |
a0d4650a | 269 | if (size == height) |
8405b70c | 270 | { |
11707b2b AD |
271 | int[] newStateStack = new int[size * 2]; |
272 | System.arraycopy (stateStack, 0, newStateStack, 0, height); | |
273 | stateStack = newStateStack; | |
274 | ]b4_locations_if([[ | |
275 | ]b4_location_type[[] newLocStack = new ]b4_location_type[[size * 2]; | |
276 | System.arraycopy (locStack, 0, newLocStack, 0, height); | |
277 | locStack = newLocStack;]]) | |
278 | ||
279 | b4_yystype[[] newValueStack = new ]b4_yystype[[size * 2]; | |
280 | System.arraycopy (valueStack, 0, newValueStack, 0, height); | |
281 | valueStack = newValueStack; | |
282 | ||
283 | size *= 2; | |
284 | } | |
8405b70c PB |
285 | |
286 | stateStack[height] = state; | |
287 | ]b4_locations_if([[locStack[height] = loc;]])[ | |
288 | valueStack[height] = value; | |
289 | } | |
290 | ||
291 | public final void pop () { | |
292 | height--; | |
293 | } | |
294 | ||
295 | public final void pop (int num) { | |
296 | // Avoid memory leaks... garbage collection is a white lie! | |
297 | if (num > 0) { | |
11707b2b | 298 | java.util.Arrays.fill (valueStack, height - num + 1, height, null); |
8405b70c PB |
299 | ]b4_locations_if([[java.util.Arrays.fill (locStack, height - num + 1, height, null);]])[ |
300 | } | |
301 | height -= num; | |
302 | } | |
303 | ||
304 | public final int stateAt (int i) { | |
305 | return stateStack[height - i]; | |
306 | } | |
307 | ||
308 | ]b4_locations_if([[public final ]b4_location_type[ locationAt (int i) { | |
309 | return locStack[height - i]; | |
310 | } | |
311 | ||
01b477c6 | 312 | ]])[public final ]b4_yystype[ valueAt (int i) { |
8405b70c PB |
313 | return valueStack[height - i]; |
314 | } | |
315 | ||
316 | // Print the state stack on the debug stream. | |
8a93f8e6 | 317 | public void print (java.io.PrintStream out) |
8405b70c PB |
318 | { |
319 | out.print ("Stack now"); | |
a0d4650a | 320 | |
8405b70c PB |
321 | for (int i = 0; i < height; i++) |
322 | { | |
11707b2b AD |
323 | out.print (' '); |
324 | out.print (stateStack[i]); | |
8405b70c PB |
325 | } |
326 | out.println (); | |
327 | } | |
328 | } | |
329 | ||
330 | /** | |
331 | * Returned by a Bison action in order to stop the parsing process and | |
332 | * return success (<tt>true</tt>). */ | |
333 | public static final int YYACCEPT = 0; | |
334 | ||
335 | /** | |
336 | * Returned by a Bison action in order to stop the parsing process and | |
337 | * return failure (<tt>false</tt>). */ | |
338 | public static final int YYABORT = 1; | |
339 | ||
340 | /** | |
341 | * Returned by a Bison action in order to start error recovery without | |
342 | * printing an error message. */ | |
343 | public static final int YYERROR = 2; | |
344 | ||
345 | /** | |
346 | * Returned by a Bison action in order to print an error message and start | |
347 | * error recovery. */ | |
348 | public static final int YYFAIL = 3; | |
349 | ||
350 | private static final int YYNEWSTATE = 4; | |
351 | private static final int YYDEFAULT = 5; | |
352 | private static final int YYREDUCE = 6; | |
353 | private static final int YYERRLAB1 = 7; | |
354 | private static final int YYRETURN = 8; | |
355 | ||
356 | private int yyerrstatus_ = 0; | |
357 | ||
358 | /** | |
359 | * Return whether error recovery is being done. In this state, the parser | |
360 | * reads token until it reaches a known state, and then restarts normal | |
361 | * operation. */ | |
d3b12988 | 362 | public final boolean recovering () |
8405b70c PB |
363 | { |
364 | return yyerrstatus_ == 0; | |
365 | } | |
366 | ||
e254a580 | 367 | private int yyaction (int yyn, YYStack yystack, int yylen) ]b4_maybe_throws([b4_throws])[ |
8405b70c | 368 | { |
01b477c6 | 369 | ]b4_yystype[ yyval; |
8405b70c PB |
370 | ]b4_locations_if([b4_location_type[ yyloc = yylloc (yystack, yylen);]])[ |
371 | ||
372 | /* If YYLEN is nonzero, implement the default value of the action: | |
373 | `$$ = $1'. Otherwise, use the top of the stack. | |
a0d4650a | 374 | |
8405b70c PB |
375 | Otherwise, the following line sets YYVAL to garbage. |
376 | This behavior is undocumented and Bison | |
377 | users should not rely upon it. */ | |
378 | if (yylen > 0) | |
379 | yyval = yystack.valueAt (yylen - 1); | |
380 | else | |
381 | yyval = yystack.valueAt (0); | |
a0d4650a | 382 | |
8405b70c PB |
383 | yy_reduce_print (yyn, yystack); |
384 | ||
385 | switch (yyn) | |
386 | { | |
11707b2b AD |
387 | ]b4_user_actions[ |
388 | default: break; | |
8405b70c PB |
389 | } |
390 | ||
391 | yy_symbol_print ("-> $$ =", yyr1_[yyn], yyval]b4_locations_if([, yyloc])[); | |
392 | ||
393 | yystack.pop (yylen); | |
394 | yylen = 0; | |
395 | ||
396 | /* Shift the result of the reduction. */ | |
397 | yyn = yyr1_[yyn]; | |
398 | int yystate = yypgoto_[yyn - yyntokens_] + yystack.stateAt (0); | |
399 | if (0 <= yystate && yystate <= yylast_ | |
11707b2b | 400 | && yycheck_[yystate] == yystack.stateAt (0)) |
8405b70c PB |
401 | yystate = yytable_[yystate]; |
402 | else | |
403 | yystate = yydefgoto_[yyn - yyntokens_]; | |
404 | ||
405 | yystack.push (yystate, yyval]b4_locations_if([, yyloc])[); | |
406 | return YYNEWSTATE; | |
407 | } | |
408 | ||
1979121c | 409 | ]b4_error_verbose_if([[ |
8405b70c PB |
410 | /* Return YYSTR after stripping away unnecessary quotes and |
411 | backslashes, so that it's suitable for yyerror. The heuristic is | |
412 | that double-quoting is unnecessary unless the string contains an | |
413 | apostrophe, a comma, or backslash (other than backslash-backslash). | |
414 | YYSTR is taken from yytname. */ | |
415 | private final String yytnamerr_ (String yystr) | |
416 | { | |
417 | if (yystr.charAt (0) == '"') | |
418 | { | |
419 | StringBuffer yyr = new StringBuffer (); | |
420 | strip_quotes: for (int i = 1; i < yystr.length (); i++) | |
421 | switch (yystr.charAt (i)) | |
422 | { | |
423 | case '\'': | |
424 | case ',': | |
425 | break strip_quotes; | |
426 | ||
427 | case '\\': | |
11707b2b | 428 | if (yystr.charAt(++i) != '\\') |
8405b70c PB |
429 | break strip_quotes; |
430 | /* Fall through. */ | |
431 | default: | |
432 | yyr.append (yystr.charAt (i)); | |
433 | break; | |
434 | ||
435 | case '"': | |
436 | return yyr.toString (); | |
437 | } | |
438 | } | |
439 | else if (yystr.equals ("$end")) | |
440 | return "end of input"; | |
441 | ||
442 | return yystr; | |
443 | } | |
1979121c | 444 | ]])[ |
8405b70c PB |
445 | |
446 | /*--------------------------------. | |
447 | | Print this symbol on YYOUTPUT. | | |
448 | `--------------------------------*/ | |
449 | ||
450 | private void yy_symbol_print (String s, int yytype, | |
11707b2b AD |
451 | ]b4_yystype[ yyvaluep]dnl |
452 | b4_locations_if([, Object yylocationp])[) | |
8405b70c PB |
453 | { |
454 | if (yydebug > 0) | |
455 | yycdebug (s + (yytype < yyntokens_ ? " token " : " nterm ") | |
11707b2b AD |
456 | + yytname_[yytype] + " ("]b4_locations_if([ |
457 | + yylocationp + ": "])[ | |
458 | + (yyvaluep == null ? "(null)" : yyvaluep.toString ()) + ")"); | |
8405b70c PB |
459 | } |
460 | ||
461 | /** | |
462 | * Parse input from the scanner that was specified at object construction | |
463 | * time. Return whether the end of the input was reached successfully. | |
464 | * | |
465 | * @@return <tt>true</tt> if the parsing succeeds. Note that this does not | |
466 | * imply that there were no syntax errors. | |
467 | */ | |
e254a580 | 468 | public boolean parse () ]b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])[ |
8405b70c PB |
469 | { |
470 | /// Lookahead and lookahead in internal form. | |
471 | int yychar = yyempty_; | |
472 | int yytoken = 0; | |
473 | ||
474 | /* State. */ | |
475 | int yyn = 0; | |
476 | int yylen = 0; | |
477 | int yystate = 0; | |
478 | ||
d3b12988 | 479 | YYStack yystack = new YYStack (); |
8405b70c PB |
480 | |
481 | /* Error handling. */ | |
482 | int yynerrs_ = 0; | |
483 | ]b4_locations_if([/// The location where the error started. | |
484 | ]b4_location_type[ yyerrloc = null; | |
485 | ||
486 | /// ]b4_location_type[ of the lookahead. | |
487 | ]b4_location_type[ yylloc = new ]b4_location_type[ (null, null); | |
488 | ||
489 | /// @@$. | |
490 | ]b4_location_type[ yyloc;]) | |
491 | ||
492 | /// Semantic value of the lookahead. | |
01b477c6 | 493 | b4_yystype[ yylval = null; |
8405b70c PB |
494 | |
495 | int yyresult; | |
496 | ||
497 | yycdebug ("Starting parse\n"); | |
498 | yyerrstatus_ = 0; | |
499 | ||
500 | ]m4_ifdef([b4_initial_action], [ | |
501 | m4_pushdef([b4_at_dollar], [yylloc])dnl | |
502 | m4_pushdef([b4_dollar_dollar], [yylval])dnl | |
503 | /* User initialization code. */ | |
504 | b4_user_initial_action | |
505 | m4_popdef([b4_dollar_dollar])dnl | |
506 | m4_popdef([b4_at_dollar])])dnl | |
507 | ||
508 | [ /* Initialize the stack. */ | |
509 | yystack.push (yystate, yylval]b4_locations_if([, yylloc])[); | |
510 | ||
511 | int label = YYNEWSTATE; | |
512 | for (;;) | |
513 | switch (label) | |
514 | { | |
515 | /* New state. Unlike in the C/C++ skeletons, the state is already | |
11707b2b | 516 | pushed when we come here. */ |
8405b70c PB |
517 | case YYNEWSTATE: |
518 | yycdebug ("Entering state " + yystate + "\n"); | |
519 | if (yydebug > 0) | |
d3b12988 | 520 | yystack.print (yyDebugStream); |
a0d4650a | 521 | |
8405b70c PB |
522 | /* Accept? */ |
523 | if (yystate == yyfinal_) | |
524 | return true; | |
a0d4650a | 525 | |
8405b70c PB |
526 | /* Take a decision. First try without lookahead. */ |
527 | yyn = yypact_[yystate]; | |
528 | if (yyn == yypact_ninf_) | |
529 | { | |
530 | label = YYDEFAULT; | |
11707b2b | 531 | break; |
8405b70c | 532 | } |
a0d4650a | 533 | |
8405b70c PB |
534 | /* Read a lookahead token. */ |
535 | if (yychar == yyempty_) | |
536 | { | |
1979121c DJ |
537 | yycdebug ("Reading a token: "); |
538 | yychar = yylexer.yylex ();] | |
01b477c6 | 539 | b4_locations_if([[ |
1979121c DJ |
540 | yylloc = new ]b4_location_type[(yylexer.getStartPos (), |
541 | yylexer.getEndPos ());]]) | |
01b477c6 | 542 | yylval = yylexer.getLVal ();[ |
8405b70c | 543 | } |
a0d4650a | 544 | |
8405b70c | 545 | /* Convert token to internal form. */ |
1979121c | 546 | if (yychar <= Lexer.EOF) |
8405b70c | 547 | { |
1979121c DJ |
548 | yychar = yytoken = Lexer.EOF; |
549 | yycdebug ("Now at end of input.\n"); | |
8405b70c PB |
550 | } |
551 | else | |
552 | { | |
11707b2b AD |
553 | yytoken = yytranslate_ (yychar); |
554 | yy_symbol_print ("Next token is", yytoken, | |
555 | yylval]b4_locations_if([, yylloc])[); | |
8405b70c | 556 | } |
a0d4650a | 557 | |
8405b70c PB |
558 | /* If the proper action on seeing token YYTOKEN is to reduce or to |
559 | detect an error, take that action. */ | |
560 | yyn += yytoken; | |
561 | if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yytoken) | |
562 | label = YYDEFAULT; | |
a0d4650a | 563 | |
8405b70c PB |
564 | /* <= 0 means reduce or error. */ |
565 | else if ((yyn = yytable_[yyn]) <= 0) | |
566 | { | |
11707b2b AD |
567 | if (yyn == 0 || yyn == yytable_ninf_) |
568 | label = YYFAIL; | |
569 | else | |
570 | { | |
571 | yyn = -yyn; | |
572 | label = YYREDUCE; | |
573 | } | |
8405b70c | 574 | } |
a0d4650a | 575 | |
8405b70c PB |
576 | else |
577 | { | |
578 | /* Shift the lookahead token. */ | |
11707b2b AD |
579 | yy_symbol_print ("Shifting", yytoken, |
580 | yylval]b4_locations_if([, yylloc])[); | |
a0d4650a | 581 | |
8405b70c PB |
582 | /* Discard the token being shifted. */ |
583 | yychar = yyempty_; | |
a0d4650a | 584 | |
8405b70c PB |
585 | /* Count tokens shifted since error; after three, turn off error |
586 | status. */ | |
587 | if (yyerrstatus_ > 0) | |
588 | --yyerrstatus_; | |
a0d4650a | 589 | |
8405b70c PB |
590 | yystate = yyn; |
591 | yystack.push (yystate, yylval]b4_locations_if([, yylloc])[); | |
592 | label = YYNEWSTATE; | |
593 | } | |
594 | break; | |
a0d4650a | 595 | |
8405b70c PB |
596 | /*-----------------------------------------------------------. |
597 | | yydefault -- do the default action for the current state. | | |
598 | `-----------------------------------------------------------*/ | |
599 | case YYDEFAULT: | |
600 | yyn = yydefact_[yystate]; | |
601 | if (yyn == 0) | |
602 | label = YYFAIL; | |
603 | else | |
604 | label = YYREDUCE; | |
605 | break; | |
a0d4650a | 606 | |
8405b70c PB |
607 | /*-----------------------------. |
608 | | yyreduce -- Do a reduction. | | |
609 | `-----------------------------*/ | |
610 | case YYREDUCE: | |
611 | yylen = yyr2_[yyn]; | |
612 | label = yyaction (yyn, yystack, yylen); | |
11707b2b | 613 | yystate = yystack.stateAt (0); |
8405b70c | 614 | break; |
a0d4650a | 615 | |
8405b70c PB |
616 | /*------------------------------------. |
617 | | yyerrlab -- here on detecting error | | |
618 | `------------------------------------*/ | |
619 | case YYFAIL: | |
620 | /* If not already recovering from an error, report this error. */ | |
621 | if (yyerrstatus_ == 0) | |
622 | { | |
11707b2b AD |
623 | ++yynerrs_; |
624 | yyerror (]b4_locations_if([yylloc, ])[yysyntax_error (yystate, yytoken)); | |
8405b70c | 625 | } |
a0d4650a | 626 | |
8405b70c PB |
627 | ]b4_locations_if([yyerrloc = yylloc;])[ |
628 | if (yyerrstatus_ == 3) | |
629 | { | |
1979121c DJ |
630 | /* If just tried and failed to reuse lookahead token after an |
631 | error, discard it. */ | |
a0d4650a | 632 | |
1979121c DJ |
633 | if (yychar <= Lexer.EOF) |
634 | { | |
635 | /* Return failure if at end of input. */ | |
636 | if (yychar == Lexer.EOF) | |
637 | return false; | |
638 | } | |
639 | else | |
11707b2b | 640 | yychar = yyempty_; |
8405b70c | 641 | } |
a0d4650a | 642 | |
8405b70c PB |
643 | /* Else will try to reuse lookahead token after shifting the error |
644 | token. */ | |
645 | label = YYERRLAB1; | |
646 | break; | |
a0d4650a | 647 | |
8405b70c PB |
648 | /*---------------------------------------------------. |
649 | | errorlab -- error raised explicitly by YYERROR. | | |
650 | `---------------------------------------------------*/ | |
651 | case YYERROR: | |
a0d4650a | 652 | |
8405b70c PB |
653 | ]b4_locations_if([yyerrloc = yystack.locationAt (yylen - 1);])[ |
654 | /* Do not reclaim the symbols of the rule which action triggered | |
655 | this YYERROR. */ | |
656 | yystack.pop (yylen); | |
657 | yylen = 0; | |
658 | yystate = yystack.stateAt (0); | |
659 | label = YYERRLAB1; | |
660 | break; | |
a0d4650a | 661 | |
8405b70c PB |
662 | /*-------------------------------------------------------------. |
663 | | yyerrlab1 -- common code for both syntax error and YYERROR. | | |
664 | `-------------------------------------------------------------*/ | |
665 | case YYERRLAB1: | |
11707b2b | 666 | yyerrstatus_ = 3; /* Each real token shifted decrements this. */ |
a0d4650a | 667 | |
8405b70c PB |
668 | for (;;) |
669 | { | |
11707b2b AD |
670 | yyn = yypact_[yystate]; |
671 | if (yyn != yypact_ninf_) | |
672 | { | |
673 | yyn += yyterror_; | |
674 | if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_) | |
675 | { | |
676 | yyn = yytable_[yyn]; | |
677 | if (0 < yyn) | |
678 | break; | |
679 | } | |
680 | } | |
681 | ||
682 | /* Pop the current state because it cannot handle the error token. */ | |
683 | if (yystack.height == 1) | |
684 | return false; | |
685 | ||
686 | ]b4_locations_if([yyerrloc = yystack.locationAt (0);])[ | |
687 | yystack.pop (); | |
688 | yystate = yystack.stateAt (0); | |
689 | if (yydebug > 0) | |
690 | yystack.print (yyDebugStream); | |
8405b70c | 691 | } |
a0d4650a | 692 | |
11707b2b AD |
693 | ]b4_locations_if([ |
694 | /* Muck with the stack to setup for yylloc. */ | |
695 | yystack.push (0, null, yylloc); | |
696 | yystack.push (0, null, yyerrloc); | |
8405b70c | 697 | yyloc = yylloc (yystack, 2); |
11707b2b | 698 | yystack.pop (2);])[ |
8405b70c PB |
699 | |
700 | /* Shift the error token. */ | |
701 | yy_symbol_print ("Shifting", yystos_[yyn], | |
11707b2b | 702 | yylval]b4_locations_if([, yyloc])[); |
a0d4650a | 703 | |
8405b70c | 704 | yystate = yyn; |
11707b2b | 705 | yystack.push (yyn, yylval]b4_locations_if([, yyloc])[); |
8405b70c PB |
706 | label = YYNEWSTATE; |
707 | break; | |
a0d4650a | 708 | |
8405b70c PB |
709 | /* Accept. */ |
710 | case YYACCEPT: | |
711 | return true; | |
a0d4650a | 712 | |
8405b70c PB |
713 | /* Abort. */ |
714 | case YYABORT: | |
715 | return false; | |
716 | } | |
717 | } | |
718 | ||
719 | // Generate an error message. | |
720 | private String yysyntax_error (int yystate, int tok) | |
1979121c DJ |
721 | {]b4_error_verbose_if([[ |
722 | if (yyErrorVerbose) | |
8405b70c PB |
723 | { |
724 | int yyn = yypact_[yystate]; | |
725 | if (yypact_ninf_ < yyn && yyn <= yylast_) | |
726 | { | |
11707b2b AD |
727 | StringBuffer res; |
728 | ||
729 | /* Start YYX at -YYN if negative to avoid negative indexes in | |
730 | YYCHECK. */ | |
731 | int yyxbegin = yyn < 0 ? -yyn : 0; | |
732 | ||
733 | /* Stay within bounds of both yycheck and yytname. */ | |
734 | int yychecklim = yylast_ - yyn + 1; | |
735 | int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_; | |
736 | int count = 0; | |
737 | for (int x = yyxbegin; x < yyxend; ++x) | |
738 | if (yycheck_[x + yyn] == x && x != yyterror_) | |
739 | ++count; | |
740 | ||
741 | // FIXME: This method of building the message is not compatible | |
742 | // with internationalization. | |
743 | res = new StringBuffer ("syntax error, unexpected "); | |
744 | res.append (yytnamerr_ (yytname_[tok])); | |
745 | if (count < 5) | |
746 | { | |
747 | count = 0; | |
748 | for (int x = yyxbegin; x < yyxend; ++x) | |
749 | if (yycheck_[x + yyn] == x && x != yyterror_) | |
750 | { | |
751 | res.append (count++ == 0 ? ", expecting " : " or "); | |
752 | res.append (yytnamerr_ (yytname_[x])); | |
753 | } | |
754 | } | |
1979121c | 755 | return res.toString (); |
8405b70c PB |
756 | } |
757 | } | |
1979121c | 758 | ]])[ |
8405b70c PB |
759 | return "syntax error"; |
760 | } | |
761 | ||
8405b70c PB |
762 | /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing |
763 | STATE-NUM. */ | |
764 | private static final ]b4_int_type_for([b4_pact])[ yypact_ninf_ = ]b4_pact_ninf[; | |
09ccae9b | 765 | ]b4_integral_parser_table([yypact_], [b4_pact])[ |
8405b70c PB |
766 | |
767 | /* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE | |
768 | doesn't specify something else to do. Zero means the default is an | |
769 | error. */ | |
09ccae9b | 770 | ]b4_integral_parser_table([yydefact_], [b4_defact])[ |
8405b70c PB |
771 | |
772 | /* YYPGOTO[NTERM-NUM]. */ | |
09ccae9b | 773 | ]b4_integral_parser_table([yypgoto_], [b4_pgoto])[ |
8405b70c PB |
774 | |
775 | /* YYDEFGOTO[NTERM-NUM]. */ | |
09ccae9b | 776 | ]b4_integral_parser_table([yydefgoto_], [b4_defgoto])[ |
8405b70c PB |
777 | |
778 | /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If | |
779 | positive, shift that token. If negative, reduce the rule which | |
780 | number is the opposite. If zero, do what YYDEFACT says. */ | |
781 | private static final ]b4_int_type_for([b4_table])[ yytable_ninf_ = ]b4_table_ninf[; | |
09ccae9b | 782 | ]b4_integral_parser_table([yytable_], [b4_table])[ |
8405b70c PB |
783 | |
784 | /* YYCHECK. */ | |
09ccae9b | 785 | ]b4_integral_parser_table([yycheck_], [b4_check])[ |
8405b70c PB |
786 | |
787 | /* STOS_[STATE-NUM] -- The (internal number of the) accessing | |
788 | symbol of state STATE-NUM. */ | |
09ccae9b | 789 | ]b4_integral_parser_table([yystos_], [b4_stos])[ |
8405b70c PB |
790 | |
791 | /* TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding | |
792 | to YYLEX-NUM. */ | |
09ccae9b | 793 | ]b4_integral_parser_table([yytoken_number_], [b4_toknum])[ |
8405b70c PB |
794 | |
795 | /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ | |
09ccae9b | 796 | ]b4_integral_parser_table([yyr1_], [b4_r1])[ |
8405b70c PB |
797 | |
798 | /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */ | |
09ccae9b | 799 | ]b4_integral_parser_table([yyr2_], [b4_r2])[ |
8405b70c PB |
800 | |
801 | /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. | |
802 | First, the terminals, then, starting at \a yyntokens_, nonterminals. */ | |
09ccae9b | 803 | ]b4_typed_parser_table([String], [yytname_], [b4_tname])[ |
8405b70c PB |
804 | |
805 | /* YYRHS -- A `-1'-separated list of the rules' RHS. */ | |
09ccae9b | 806 | ]b4_integral_parser_table([yyrhs_], [b4_rhs])[ |
8405b70c PB |
807 | |
808 | /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in | |
809 | YYRHS. */ | |
09ccae9b | 810 | ]b4_integral_parser_table([yyprhs_], [b4_prhs])[ |
8405b70c PB |
811 | |
812 | /* YYRLINE[YYN] -- Source line where rule number YYN was defined. */ | |
09ccae9b | 813 | ]b4_integral_parser_table([yyrline_], [b4_rline])[ |
8405b70c PB |
814 | |
815 | // Report on the debug stream that the rule yyrule is going to be reduced. | |
d3b12988 | 816 | private void yy_reduce_print (int yyrule, YYStack yystack) |
8405b70c PB |
817 | { |
818 | if (yydebug == 0) | |
819 | return; | |
820 | ||
821 | int yylno = yyrline_[yyrule]; | |
822 | int yynrhs = yyr2_[yyrule]; | |
823 | /* Print the symbols being reduced, and their result. */ | |
824 | yycdebug ("Reducing stack by rule " + (yyrule - 1) | |
11707b2b | 825 | + " (line " + yylno + "), "); |
8405b70c PB |
826 | |
827 | /* The symbols being reduced. */ | |
828 | for (int yyi = 0; yyi < yynrhs; yyi++) | |
829 | yy_symbol_print (" $" + (yyi + 1) + " =", | |
11707b2b AD |
830 | yyrhs_[yyprhs_[yyrule] + yyi], |
831 | ]b4_rhs_value(yynrhs, yyi + 1)b4_locations_if([, | |
832 | b4_rhs_location(yynrhs, yyi + 1)])[); | |
8405b70c PB |
833 | } |
834 | ||
835 | /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */ | |
09ccae9b | 836 | ]b4_integral_parser_table([yytranslate_table_], [b4_translate])[ |
8405b70c PB |
837 | |
838 | private static final ]b4_int_type_for([b4_translate])[ yytranslate_ (int t) | |
839 | { | |
840 | if (t >= 0 && t <= yyuser_token_number_max_) | |
841 | return yytranslate_table_[t]; | |
842 | else | |
843 | return yyundef_token_; | |
844 | } | |
845 | ||
846 | private static final int yylast_ = ]b4_last[; | |
847 | private static final int yynnts_ = ]b4_nterms_number[; | |
848 | private static final int yyempty_ = -2; | |
849 | private static final int yyfinal_ = ]b4_final_state_number[; | |
850 | private static final int yyterror_ = 1; | |
851 | private static final int yyerrcode_ = 256; | |
852 | private static final int yyntokens_ = ]b4_tokens_number[; | |
853 | ||
854 | private static final int yyuser_token_number_max_ = ]b4_user_token_number_max[; | |
855 | private static final int yyundef_token_ = ]b4_undef_token_number[; | |
856 | ||
857 | ]/* User implementation code. */ | |
858 | b4_percent_code_get[]dnl | |
859 | ||
860 | } | |
861 | ||
862 | b4_epilogue | |
863 | m4_divert_pop(0)dnl |