source: trunk/tools/qdoc3/tokenizer.cpp@ 1030

Last change on this file since 1030 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 24.2 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the tools applications of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include "config.h"
43#include "tokenizer.h"
44
45#include <qdebug.h>
46#include <qfile.h>
47#include <qhash.h>
48#include <qregexp.h>
49#include <qstring.h>
50#include <qtextcodec.h>
51
52#include <ctype.h>
53#include <string.h>
54
55QT_BEGIN_NAMESPACE
56
57#define LANGUAGE_CPP "Cpp"
58
59/* qmake ignore Q_OBJECT */
60
61/*
62 Keep in sync with tokenizer.h.
63*/
64static const char *kwords[] = {
65 "char", "class", "const", "double", "enum", "explicit",
66 "friend", "inline", "int", "long", "namespace", "operator",
67 "private", "protected", "public", "short", "signals", "signed",
68 "slots", "static", "struct", "template", "typedef", "typename",
69 "union", "unsigned", "using", "virtual", "void", "volatile",
70 "__int64",
71 "Q_OBJECT",
72 "Q_OVERRIDE",
73 "Q_PROPERTY",
74 "Q_PRIVATE_PROPERTY",
75 "Q_DECLARE_SEQUENTIAL_ITERATOR",
76 "Q_DECLARE_MUTABLE_SEQUENTIAL_ITERATOR",
77 "Q_DECLARE_ASSOCIATIVE_ITERATOR",
78 "Q_DECLARE_MUTABLE_ASSOCIATIVE_ITERATOR",
79 "Q_DECLARE_FLAGS",
80 "Q_SIGNALS",
81 "Q_SLOTS",
82 "QT_COMPAT",
83 "QT_COMPAT_CONSTRUCTOR",
84 "QT_DEPRECATED",
85 "QT_MOC_COMPAT",
86 "QT_MODULE",
87 "QT3_SUPPORT",
88 "QT3_SUPPORT_CONSTRUCTOR",
89 "QT3_MOC_SUPPORT",
90 "QDOC_PROPERTY"
91};
92
93static const int KwordHashTableSize = 4096;
94static int kwordHashTable[KwordHashTableSize];
95
96static QHash<QByteArray, bool> *ignoredTokensAndDirectives = 0;
97
98static QRegExp *comment = 0;
99static QRegExp *versionX = 0;
100static QRegExp *definedX = 0;
101
102static QRegExp *defines = 0;
103static QRegExp *falsehoods = 0;
104
105static QTextCodec *sourceCodec = 0;
106
107/*
108 This function is a perfect hash function for the 37 keywords of C99
109 (with a hash table size of 512). It should perform well on our
110 Qt-enhanced C++ subset.
111*/
112static int hashKword(const char *s, int len)
113{
114 return (((uchar) s[0]) + (((uchar) s[2]) << 5) +
115 (((uchar) s[len - 1]) << 3)) % KwordHashTableSize;
116}
117
118static void insertKwordIntoHash(const char *s, int number)
119{
120 int k = hashKword(s, strlen(s));
121 while (kwordHashTable[k]) {
122 if (++k == KwordHashTableSize)
123 k = 0;
124 }
125 kwordHashTable[k] = number;
126}
127
128Tokenizer::Tokenizer(const Location& loc, QFile &in)
129{
130 init();
131 yyIn = in.readAll();
132 yyPos = 0;
133 start(loc);
134}
135
136Tokenizer::Tokenizer(const Location& loc, const QByteArray &in)
137 : yyIn(in)
138{
139 init();
140 yyPos = 0;
141 start(loc);
142}
143
144Tokenizer::~Tokenizer()
145{
146 delete[] yyLexBuf1;
147 delete[] yyLexBuf2;
148}
149
150int Tokenizer::getToken()
151{
152 char *t = yyPrevLex;
153 yyPrevLex = yyLex;
154 yyLex = t;
155
156 while (yyCh != EOF) {
157 yyTokLoc = yyCurLoc;
158 yyLexLen = 0;
159
160 if (isspace(yyCh)) {
161 do {
162 yyCh = getChar();
163 } while (isspace(yyCh));
164 }
165 else if (isalpha(yyCh) || yyCh == '_') {
166 do {
167 yyCh = getChar();
168 } while (isalnum(yyCh) || yyCh == '_');
169
170 int k = hashKword(yyLex, yyLexLen);
171 for (;;) {
172 int i = kwordHashTable[k];
173 if (i == 0) {
174 return Tok_Ident;
175 }
176 else if (i == -1) {
177 if (!parsingMacro && ignoredTokensAndDirectives->contains(yyLex)) {
178 if (ignoredTokensAndDirectives->value(yyLex)) { // it's a directive
179 int parenDepth = 0;
180 while (yyCh != EOF && (yyCh != ')' || parenDepth > 1)) {
181 if (yyCh == '(')
182 ++parenDepth;
183 else if (yyCh == ')')
184 --parenDepth;
185 yyCh = getChar();
186 }
187 if (yyCh == ')')
188 yyCh = getChar();
189 }
190 break;
191 }
192 }
193 else if (strcmp(yyLex, kwords[i - 1]) == 0) {
194 int ret = (int) Tok_FirstKeyword + i - 1;
195 if (ret != Tok_explicit && ret != Tok_inline && ret != Tok_typename)
196 return ret;
197 break;
198 }
199
200 if (++k == KwordHashTableSize)
201 k = 0;
202 }
203 }
204 else if (isdigit(yyCh)) {
205 do {
206 yyCh = getChar();
207 } while (isalnum(yyCh) || yyCh == '.' || yyCh == '+' ||
208 yyCh == '-');
209 return Tok_Number;
210 }
211 else {
212 switch (yyCh) {
213 case '!':
214 case '%':
215 yyCh = getChar();
216 if (yyCh == '=')
217 yyCh = getChar();
218 return Tok_SomeOperator;
219 case '"':
220 yyCh = getChar();
221
222 while (yyCh != EOF && yyCh != '"') {
223 if (yyCh == '\\')
224 yyCh = getChar();
225 yyCh = getChar();
226 }
227 yyCh = getChar();
228
229 if (yyCh == EOF)
230 yyTokLoc.warning(tr("Unterminated C++ string literal"),
231 tr("Maybe you forgot '/*!' at the beginning of the file?"));
232 else
233 return Tok_String;
234 break;
235 case '#':
236 return getTokenAfterPreprocessor();
237 case '&':
238 yyCh = getChar();
239 if (yyCh == '&' || yyCh == '=') {
240 yyCh = getChar();
241 return Tok_SomeOperator;
242 }
243 else {
244 return Tok_Ampersand;
245 }
246 case '\'':
247 yyCh = getChar();
248 if (yyCh == '\\')
249 yyCh = getChar();
250 do {
251 yyCh = getChar();
252 } while (yyCh != EOF && yyCh != '\'');
253
254 if (yyCh == EOF) {
255 yyTokLoc.warning(tr("Unterminated C++ character"
256 " literal"));
257 }
258 else {
259 yyCh = getChar();
260 return Tok_Number;
261 }
262 break;
263 case '(':
264 yyCh = getChar();
265 if (yyNumPreprocessorSkipping == 0)
266 yyParenDepth++;
267 if (isspace(yyCh)) {
268 do {
269 yyCh = getChar();
270 } while (isspace(yyCh));
271 yyLexLen = 1;
272 yyLex[1] = '\0';
273 }
274 if (yyCh == '*') {
275 yyCh = getChar();
276 return Tok_LeftParenAster;
277 }
278 return Tok_LeftParen;
279 case ')':
280 yyCh = getChar();
281 if (yyNumPreprocessorSkipping == 0)
282 yyParenDepth--;
283 return Tok_RightParen;
284 case '*':
285 yyCh = getChar();
286 if (yyCh == '=') {
287 yyCh = getChar();
288 return Tok_SomeOperator;
289 } else {
290 return Tok_Aster;
291 }
292 case '^':
293 yyCh = getChar();
294 if (yyCh == '=') {
295 yyCh = getChar();
296 return Tok_SomeOperator;
297 } else {
298 return Tok_Caret;
299 }
300 case '+':
301 yyCh = getChar();
302 if (yyCh == '+' || yyCh == '=')
303 yyCh = getChar();
304 return Tok_SomeOperator;
305 case ',':
306 yyCh = getChar();
307 return Tok_Comma;
308 case '-':
309 yyCh = getChar();
310 if (yyCh == '-' || yyCh == '=') {
311 yyCh = getChar();
312 } else if (yyCh == '>') {
313 yyCh = getChar();
314 if (yyCh == '*')
315 yyCh = getChar();
316 }
317 return Tok_SomeOperator;
318 case '.':
319 yyCh = getChar();
320 if (yyCh == '*') {
321 yyCh = getChar();
322 } else if (yyCh == '.') {
323 do {
324 yyCh = getChar();
325 } while (yyCh == '.');
326 return Tok_Ellipsis;
327 } else if (isdigit(yyCh)) {
328 do {
329 yyCh = getChar();
330 } while (isalnum(yyCh) || yyCh == '.' || yyCh == '+' ||
331 yyCh == '-');
332 return Tok_Number;
333 }
334 return Tok_SomeOperator;
335 case '/':
336 yyCh = getChar();
337 if (yyCh == '/') {
338 do {
339 yyCh = getChar();
340 } while (yyCh != EOF && yyCh != '\n');
341 } else if (yyCh == '*') {
342 bool metDoc = false; // empty doc is no doc
343 bool metSlashAsterBang = false;
344 bool metAster = false;
345 bool metAsterSlash = false;
346
347 yyCh = getChar();
348 if (yyCh == '!')
349 metSlashAsterBang = true;
350
351 while (!metAsterSlash) {
352 if (yyCh == EOF) {
353 yyTokLoc.warning(tr("Unterminated C++ comment"));
354 break;
355 } else {
356 if (yyCh == '*') {
357 metAster = true;
358 } else if (metAster && yyCh == '/') {
359 metAsterSlash = true;
360 } else {
361 metAster = false;
362 if (isgraph(yyCh))
363 metDoc = true;
364 }
365 }
366 yyCh = getChar();
367 }
368 if (metSlashAsterBang && metDoc)
369 return Tok_Doc;
370 else if (yyParenDepth > 0)
371 return Tok_Comment;
372 } else {
373 if (yyCh == '=')
374 yyCh = getChar();
375 return Tok_SomeOperator;
376 }
377 break;
378 case ':':
379 yyCh = getChar();
380 if (yyCh == ':') {
381 yyCh = getChar();
382 return Tok_Gulbrandsen;
383 } else {
384 return Tok_Colon;
385 }
386 case ';':
387 yyCh = getChar();
388 return Tok_Semicolon;
389 case '<':
390 yyCh = getChar();
391 if (yyCh == '<') {
392 yyCh = getChar();
393 if (yyCh == '=')
394 yyCh = getChar();
395 return Tok_SomeOperator;
396 } else if (yyCh == '=') {
397 yyCh = getChar();
398 return Tok_SomeOperator;
399 } else {
400 return Tok_LeftAngle;
401 }
402 case '=':
403 yyCh = getChar();
404 if (yyCh == '=') {
405 yyCh = getChar();
406 return Tok_SomeOperator;
407 } else {
408 return Tok_Equal;
409 }
410 case '>':
411 yyCh = getChar();
412 if (yyCh == '>') {
413 yyCh = getChar();
414 if (yyCh == '=')
415 yyCh = getChar();
416 return Tok_SomeOperator;
417 } else if (yyCh == '=') {
418 yyCh = getChar();
419 return Tok_SomeOperator;
420 } else {
421 return Tok_RightAngle;
422 }
423 case '?':
424 yyCh = getChar();
425 return Tok_SomeOperator;
426 case '[':
427 yyCh = getChar();
428 if (yyNumPreprocessorSkipping == 0)
429 yyBracketDepth++;
430 return Tok_LeftBracket;
431 case '\\':
432 yyCh = getChar();
433 yyCh = getChar(); // skip one character
434 break;
435 case ']':
436 yyCh = getChar();
437 if (yyNumPreprocessorSkipping == 0)
438 yyBracketDepth--;
439 return Tok_RightBracket;
440 case '{':
441 yyCh = getChar();
442 if (yyNumPreprocessorSkipping == 0)
443 yyBraceDepth++;
444 return Tok_LeftBrace;
445 case '}':
446 yyCh = getChar();
447 if (yyNumPreprocessorSkipping == 0)
448 yyBraceDepth--;
449 return Tok_RightBrace;
450 case '|':
451 yyCh = getChar();
452 if (yyCh == '|' || yyCh == '=')
453 yyCh = getChar();
454 return Tok_SomeOperator;
455 case '~':
456 yyCh = getChar();
457 return Tok_Tilde;
458 case '@':
459 yyCh = getChar();
460 return Tok_At;
461 default:
462 // ### We should really prevent qdoc from looking at snippet files rather than
463 // ### suppress warnings when reading them.
464 if (yyNumPreprocessorSkipping == 0 && !yyTokLoc.fileName().endsWith(".qdoc")) {
465 yyTokLoc.warning(tr("Hostile character 0x%1 in C++ source")
466 .arg((uchar)yyCh, 1, 16));
467 }
468 yyCh = getChar();
469 }
470 }
471 }
472
473 if (yyPreprocessorSkipping.count() > 1) {
474 yyTokLoc.warning(tr("Expected #endif before end of file"));
475 // clear it out or we get an infinite loop!
476 while (!yyPreprocessorSkipping.isEmpty()) {
477 popSkipping();
478 }
479 }
480
481 strcpy(yyLex, "end-of-input");
482 yyLexLen = strlen(yyLex);
483 return Tok_Eoi;
484}
485
486void Tokenizer::initialize(const Config &config)
487{
488 QString versionSym = config.getString(CONFIG_VERSIONSYM);
489
490 QString sourceEncoding = config.getString(CONFIG_SOURCEENCODING);
491 if (sourceEncoding.isEmpty())
492 sourceEncoding = QLatin1String("ISO-8859-1");
493 sourceCodec = QTextCodec::codecForName(sourceEncoding.toLocal8Bit());
494
495 comment = new QRegExp("/(?:\\*.*\\*/|/.*\n|/[^\n]*$)");
496 comment->setMinimal(true);
497 versionX = new QRegExp("$cannot possibly match^");
498 if (!versionSym.isEmpty())
499 versionX->setPattern("[ \t]*(?:" + QRegExp::escape(versionSym)
500 + ")[ \t]+\"([^\"]*)\"[ \t]*");
501 definedX = new QRegExp("defined ?\\(?([A-Z_0-9a-z]+) ?\\)");
502
503 QStringList d = config.getStringList(CONFIG_DEFINES);
504 d += "qdoc";
505 defines = new QRegExp(d.join("|"));
506 falsehoods = new QRegExp(config.getStringList(CONFIG_FALSEHOODS).join("|"));
507
508 memset(kwordHashTable, 0, sizeof(kwordHashTable));
509 for (int i = 0; i < Tok_LastKeyword - Tok_FirstKeyword + 1; i++)
510 insertKwordIntoHash(kwords[i], i + 1);
511
512 ignoredTokensAndDirectives = new QHash<QByteArray, bool>;
513
514 QStringList tokens = config.getStringList(LANGUAGE_CPP + Config::dot + CONFIG_IGNORETOKENS);
515 foreach (const QString &t, tokens) {
516 const QByteArray tb = t.toAscii();
517 ignoredTokensAndDirectives->insert(tb, false);
518 insertKwordIntoHash(tb.data(), -1);
519 }
520
521 QStringList directives = config.getStringList(LANGUAGE_CPP + Config::dot
522 + CONFIG_IGNOREDIRECTIVES);
523 foreach (const QString &d, directives) {
524 const QByteArray db = d.toAscii();
525 ignoredTokensAndDirectives->insert(db, true);
526 insertKwordIntoHash(db.data(), -1);
527 }
528}
529
530void Tokenizer::terminate()
531{
532 delete comment;
533 comment = 0;
534 delete versionX;
535 versionX = 0;
536 delete definedX;
537 definedX = 0;
538 delete defines;
539 defines = 0;
540 delete falsehoods;
541 falsehoods = 0;
542 delete ignoredTokensAndDirectives;
543 ignoredTokensAndDirectives = 0;
544}
545
546void Tokenizer::init()
547{
548 yyLexBuf1 = new char[(int) yyLexBufSize];
549 yyLexBuf2 = new char[(int) yyLexBufSize];
550 yyPrevLex = yyLexBuf1;
551 yyPrevLex[0] = '\0';
552 yyLex = yyLexBuf2;
553 yyLex[0] = '\0';
554 yyLexLen = 0;
555 yyPreprocessorSkipping.push(false);
556 yyNumPreprocessorSkipping = 0;
557 yyBraceDepth = 0;
558 yyParenDepth = 0;
559 yyBracketDepth = 0;
560 yyCh = '\0';
561 parsingMacro = false;
562}
563
564void Tokenizer::start(const Location& loc)
565{
566 yyTokLoc = loc;
567 yyCurLoc = loc;
568 yyCurLoc.start();
569 strcpy(yyPrevLex, "beginning-of-input");
570 strcpy(yyLex, "beginning-of-input");
571 yyLexLen = strlen(yyLex);
572 yyBraceDepth = 0;
573 yyParenDepth = 0;
574 yyBracketDepth = 0;
575 yyCh = '\0';
576 yyCh = getChar();
577}
578
579/*
580 Returns the next token, if # was met. This function interprets the
581 preprocessor directive, skips over any #ifdef'd out tokens, and returns the
582 token after all of that.
583*/
584int Tokenizer::getTokenAfterPreprocessor()
585{
586 yyCh = getChar();
587 while (isspace(yyCh) && yyCh != '\n')
588 yyCh = getChar();
589
590 /*
591 #directive condition
592 */
593 QString directive;
594 QString condition;
595
596 while (isalpha(yyCh)) {
597 directive += QChar(yyCh);
598 yyCh = getChar();
599 }
600 if (!directive.isEmpty()) {
601 while (yyCh != EOF && yyCh != '\n') {
602 if (yyCh == '\\')
603 yyCh = getChar();
604 condition += yyCh;
605 yyCh = getChar();
606 }
607 condition.replace(*comment, "");
608 condition = condition.simplified();
609
610 /*
611 The #if, #ifdef, #ifndef, #elif, #else, and #endif
612 directives have an effect on the skipping stack. For
613 instance, if the code processed so far is
614
615 #if 1
616 #if 0
617 #if 1
618 // ...
619 #else
620
621 the skipping stack contains, from bottom to top, false true
622 true (assuming 0 is false and 1 is true). If at least one
623 entry of the stack is true, the tokens are skipped.
624
625 This mechanism is simple yet hard to understand.
626 */
627 if (directive[0] == QChar('i')) {
628 if (directive == QString("if"))
629 pushSkipping(!isTrue(condition));
630 else if (directive == QString("ifdef"))
631 pushSkipping(!defines->exactMatch(condition));
632 else if (directive == QString("ifndef"))
633 pushSkipping(defines->exactMatch(condition));
634 } else if (directive[0] == QChar('e')) {
635 if (directive == QString("elif")) {
636 bool old = popSkipping();
637 if (old)
638 pushSkipping(!isTrue(condition));
639 else
640 pushSkipping(true);
641 } else if (directive == QString("else")) {
642 pushSkipping(!popSkipping());
643 } else if (directive == QString("endif")) {
644 popSkipping();
645 }
646 } else if (directive == QString("define")) {
647 if (versionX->exactMatch(condition))
648 yyVersion = versionX->cap(1);
649 }
650 }
651
652 int tok;
653 do {
654 /*
655 We set yyLex now, and after getToken() this will be
656 yyPrevLex. This way, we skip over the preprocessor
657 directive.
658 */
659 qstrcpy(yyLex, yyPrevLex);
660
661 /*
662 If getToken() meets another #, it will call
663 getTokenAfterPreprocessor() once again, which could in turn
664 call getToken() again, etc. Unless there are 10,000 or so
665 preprocessor directives in a row, this shouldn't overflow
666 the stack.
667 */
668 tok = getToken();
669 } while (yyNumPreprocessorSkipping > 0);
670 return tok;
671}
672
673/*
674 Pushes a new skipping value onto the stack. This corresponds to entering a
675 new #if block.
676*/
677void Tokenizer::pushSkipping(bool skip)
678{
679 yyPreprocessorSkipping.push(skip);
680 if (skip)
681 yyNumPreprocessorSkipping++;
682}
683
684/*
685 Pops a skipping value from the stack. This corresponds to reaching a #endif.
686*/
687bool Tokenizer::popSkipping()
688{
689 if (yyPreprocessorSkipping.isEmpty()) {
690 yyTokLoc.warning(tr("Unexpected #elif, #else or #endif"));
691 return true;
692 }
693
694 bool skip = yyPreprocessorSkipping.pop();
695 if (skip)
696 yyNumPreprocessorSkipping--;
697 return skip;
698}
699
700/*
701 Returns true if the condition evaluates as true, otherwise false. The
702 condition is represented by a string. Unsophisticated parsing techniques are
703 used. The preprocessing method could be named StriNg-Oriented PreProcessing,
704 as SNOBOL stands for StriNg-Oriented symBOlic Language.
705*/
706bool Tokenizer::isTrue(const QString &condition)
707{
708 int firstOr = -1;
709 int firstAnd = -1;
710 int parenDepth = 0;
711
712 /*
713 Find the first logical operator at top level, but be careful
714 about precedence. Examples:
715
716 X || Y // the or
717 X || Y || Z // the leftmost or
718 X || Y && Z // the or
719 X && Y || Z // the or
720 (X || Y) && Z // the and
721 */
722 for (int i = 0; i < (int) condition.length() - 1; i++) {
723 QChar ch = condition[i];
724 if (ch == QChar('(')) {
725 parenDepth++;
726 } else if (ch == QChar(')')) {
727 parenDepth--;
728 } else if (parenDepth == 0) {
729 if (condition[i + 1] == ch) {
730 if (ch == QChar('|')) {
731 firstOr = i;
732 break;
733 } else if (ch == QChar('&')) {
734 if (firstAnd == -1)
735 firstAnd = i;
736 }
737 }
738 }
739 }
740 if (firstOr != -1)
741 return isTrue(condition.left(firstOr)) ||
742 isTrue(condition.mid(firstOr + 2));
743 if (firstAnd != -1)
744 return isTrue(condition.left(firstAnd)) &&
745 isTrue(condition.mid(firstAnd + 2));
746
747 QString t = condition.simplified();
748 if (t.isEmpty())
749 return true;
750
751 if (t[0] == QChar('!'))
752 return !isTrue(t.mid(1));
753 if (t[0] == QChar('(') && t.right(1)[0] == QChar(')'))
754 return isTrue(t.mid(1, t.length() - 2));
755
756 if (definedX->exactMatch(t))
757 return defines->exactMatch(definedX->cap(1));
758 else
759 return !falsehoods->exactMatch(t);
760}
761
762QString Tokenizer::lexeme() const
763{
764 return sourceCodec->toUnicode(yyLex);
765}
766
767QString Tokenizer::previousLexeme() const
768{
769 return sourceCodec->toUnicode(yyPrevLex);
770}
771
772QT_END_NAMESPACE
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