Parser.cpp 152 KB
Newer Older
1
/**************************************************************************
con's avatar
con committed
2
3
4
**
** This file is part of Qt Creator
**
5
** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
con's avatar
con committed
6
**
7
** Contact: Nokia Corporation (qt-info@nokia.com)
con's avatar
con committed
8
**
9
** Commercial Usage
10
**
11
12
13
14
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
15
**
16
** GNU Lesser General Public License Usage
17
**
18
19
20
21
22
23
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
24
**
25
** If you are unsure which license is appropriate for your use, please
hjk's avatar
hjk committed
26
** contact the sales department at http://qt.nokia.com/contact.
con's avatar
con committed
27
**
28
**************************************************************************/
con's avatar
con committed
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
// Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#include "Parser.h"
#include "Token.h"
#include "Lexer.h"
#include "Control.h"
#include "AST.h"
#include "Literals.h"
55
#include "ObjectiveCTypeQualifiers.h"
con's avatar
con committed
56
#include <cstdlib>
Thorbjørn Lindeijer's avatar
Thorbjørn Lindeijer committed
57
#include <cstring>
Roberto Raggi's avatar
Roberto Raggi committed
58
#include <iostream>
con's avatar
con committed
59
#include <cassert>
Robert Loehning's avatar
Robert Loehning committed
60
#include <string>
61

Roberto Raggi's avatar
Roberto Raggi committed
62
63
#define CPLUSPLUS_NO_DEBUG_RULE

64
65
using namespace CPlusPlus;

Roberto Raggi's avatar
Roberto Raggi committed
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
namespace {

class DebugRule {
    const char *name;
    static int depth;

public:
    DebugRule(const char *name)
        : name(name)
    { std::cout << std::string(depth++, ' ') << name << std::endl; }

    ~DebugRule()
    { --depth; }
};

int DebugRule::depth = 0;

} // end of anonymous namespace

#ifndef CPLUSPLUS_NO_DEBUG_RULE
#  define DEBUG_THIS_RULE() DebugRule __debug_rule__(__func__)
#else
#  define DEBUG_THIS_RULE() do {} while (0)
#endif

91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
class Parser::Rewind
{
    Parser *_parser;
    MemoryPool::State _state;

public:
    inline Rewind(Parser *parser)
        : _parser(parser) {}

    inline void operator()(unsigned tokenIndex)
    { rewind(tokenIndex); }

    inline void mark()
    { _state = _parser->_pool->state(); }

    inline void rewind(unsigned tokenIndex)
    {
        _parser->rewind(tokenIndex);

        if (_state.isValid())
            _parser->_pool->rewind(_state);
    }
};

con's avatar
con committed
115
116
117
118
119
120
121
Parser::Parser(TranslationUnit *unit)
    : _translationUnit(unit),
      _control(_translationUnit->control()),
      _pool(_translationUnit->memoryPool()),
      _tokenIndex(1),
      _templateArguments(0),
      _qtMocRunEnabled(false),
Roberto Raggi's avatar
Roberto Raggi committed
122
123
124
      _objCEnabled(false),
      _inFunctionBody(false),
      _inObjCImplementationContext(false)
con's avatar
con committed
125
126
127
128
129
130
131
132
133
134
135
{ }

Parser::~Parser()
{ }

bool Parser::qtMocRunEnabled() const
{ return _qtMocRunEnabled; }

void Parser::setQtMocRunEnabled(bool onoff)
{ _qtMocRunEnabled = onoff; }

Roberto Raggi's avatar
Roberto Raggi committed
136
137
138
139
140
141
bool Parser::objCEnabled() const
{ return _objCEnabled; }

void Parser::setObjCEnabled(bool onoff)
{ _objCEnabled = onoff; }

con's avatar
con committed
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
bool Parser::switchTemplateArguments(bool templateArguments)
{
    bool previousTemplateArguments = _templateArguments;
    _templateArguments = templateArguments;
    return previousTemplateArguments;
}

bool Parser::blockErrors(bool block)
{ return _translationUnit->blockErrors(block); }

bool Parser::skipUntil(int token)
{
    while (int tk = LA()) {
        if (tk == token)
            return true;

        consumeToken();
    }

    return false;
}

bool Parser::skipUntilDeclaration()
{
    while (int tk = LA()) {
        switch (tk) {
            case T_SEMICOLON:
            case T_TILDE:
            case T_COLON_COLON:
            case T_IDENTIFIER:
            case T_OPERATOR:
            case T_CHAR:
            case T_WCHAR_T:
            case T_BOOL:
            case T_SHORT:
            case T_INT:
            case T_LONG:
            case T_SIGNED:
            case T_UNSIGNED:
            case T_FLOAT:
            case T_DOUBLE:
            case T_VOID:
            case T_EXTERN:
            case T_NAMESPACE:
            case T_USING:
            case T_TYPEDEF:
            case T_ASM:
            case T_TEMPLATE:
            case T_EXPORT:
            case T_CONST:
            case T_VOLATILE:
            case T_PUBLIC:
            case T_PROTECTED:
            case T_PRIVATE:
196
197
198
199
            case T_CLASS:
            case T_STRUCT:
            case T_UNION:
            case T_TYPENAME:
con's avatar
con committed
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
                return true;

            default:
                consumeToken();
        }
    }

    return false;
}

bool Parser::skipUntilStatement()
{
    while (int tk = LA()) {
        switch (tk) {
            case T_SEMICOLON:
            case T_LBRACE:
            case T_RBRACE:
            case T_CONST:
            case T_VOLATILE:
            case T_IDENTIFIER:
            case T_CASE:
            case T_DEFAULT:
            case T_IF:
            case T_SWITCH:
            case T_WHILE:
            case T_DO:
            case T_FOR:
            case T_BREAK:
            case T_CONTINUE:
            case T_RETURN:
            case T_GOTO:
            case T_TRY:
            case T_CATCH:
            case T_THROW:
            case T_CHAR:
            case T_WCHAR_T:
            case T_BOOL:
            case T_SHORT:
            case T_INT:
            case T_LONG:
            case T_SIGNED:
            case T_UNSIGNED:
            case T_FLOAT:
            case T_DOUBLE:
            case T_VOID:
            case T_CLASS:
            case T_STRUCT:
            case T_UNION:
            case T_ENUM:
            case T_COLON_COLON:
            case T_TEMPLATE:
            case T_USING:
                return true;

254
255
256
257
            case T_AT_SYNCHRONIZED:
                if (objCEnabled())
                    return true;

con's avatar
con committed
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
            default:
                consumeToken();
        }
    }

    return false;
}

bool Parser::skip(int l, int r)
{
    int count = 0;

    while (int tk = LA()) {
        if (tk == l)
            ++count;
        else if (tk == r)
            --count;
        else if (l != T_LBRACE && (tk == T_LBRACE ||
                                   tk == T_RBRACE ||
                                   tk == T_SEMICOLON))
            return false;

        if (count == 0)
            return true;

        consumeToken();
    }

    return false;
}

void Parser::match(int kind, unsigned *token)
{
    if (LA() == kind)
        *token = consumeToken();
    else {
        *token = 0;
        _translationUnit->error(_tokenIndex, "expected token `%s' got `%s'",
                                Token::name(kind), tok().spell());
    }
}

bool Parser::parseClassOrNamespaceName(NameAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
302
    DEBUG_THIS_RULE();
con's avatar
con committed
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
    if (LA() == T_IDENTIFIER) {
        unsigned identifier_token = cursor();

        if (LA(2) == T_LESS && parseTemplateId(node) && LA() == T_COLON_COLON)
            return true;

        rewind(identifier_token);

        if (LA(2) == T_COLON_COLON) {
            SimpleNameAST *ast = new (_pool) SimpleNameAST;
            ast->identifier_token = consumeToken();
            node = ast;
            return true;
        }
    } else if (LA() == T_TEMPLATE) {
        unsigned template_token = consumeToken();
        if (parseTemplateId(node))
            return true;
        rewind(template_token);
    }
    return false;
}

bool Parser::parseTemplateId(NameAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
328
    DEBUG_THIS_RULE();
329
330
331

    const unsigned start = cursor();

con's avatar
con committed
332
333
334
335
336
337
338
339
340
341
342
343
344
    if (LA() == T_IDENTIFIER && LA(2) == T_LESS) {
        TemplateIdAST *ast = new (_pool) TemplateIdAST;
        ast->identifier_token = consumeToken();
        ast->less_token = consumeToken();
        if (LA() == T_GREATER || parseTemplateArgumentList(
                ast->template_arguments)) {
            if (LA() == T_GREATER) {
                ast->greater_token = consumeToken();
                node = ast;
                return true;
            }
        }
    }
345
346
347

    rewind(start);

con's avatar
con committed
348
349
350
351
352
353
    return false;
}

bool Parser::parseNestedNameSpecifier(NestedNameSpecifierAST *&node,
                                      bool /*acceptTemplateId*/)
{
Roberto Raggi's avatar
Roberto Raggi committed
354
    DEBUG_THIS_RULE();
con's avatar
con committed
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
    NestedNameSpecifierAST **nested_name_specifier = &node;
    NameAST *class_or_namespace_name = 0;
    if (parseClassOrNamespaceName(class_or_namespace_name) &&
            LA() == T_COLON_COLON) {
        unsigned scope_token = consumeToken();
        *nested_name_specifier = new (_pool) NestedNameSpecifierAST;
        (*nested_name_specifier)->class_or_namespace_name
                = class_or_namespace_name;
        (*nested_name_specifier)->scope_token = scope_token;

        nested_name_specifier = &(*nested_name_specifier)->next;

        while (parseClassOrNamespaceName(class_or_namespace_name) &&
               LA() == T_COLON_COLON) {
            scope_token = consumeToken();
            *nested_name_specifier = new (_pool) NestedNameSpecifierAST;
            (*nested_name_specifier)->class_or_namespace_name = class_or_namespace_name;
            (*nested_name_specifier)->scope_token = scope_token;
            nested_name_specifier = &(*nested_name_specifier)->next;
        }

        // ### ugly hack
        rewind(scope_token);
        consumeToken();
        return true;
    }

    return false;
}

bool Parser::parseNestedNameSpecifierOpt(NestedNameSpecifierAST *&name,
        bool acceptTemplateId)
{
Roberto Raggi's avatar
Roberto Raggi committed
388
    DEBUG_THIS_RULE();
con's avatar
con committed
389
390
391
392
393
394
395
396
    unsigned start = cursor();
    if (! parseNestedNameSpecifier(name, acceptTemplateId))
        rewind(start);
    return true;
}

bool Parser::parseName(NameAST *&node, bool acceptTemplateId)
{
Roberto Raggi's avatar
Roberto Raggi committed
397
    DEBUG_THIS_RULE();
con's avatar
con committed
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
    unsigned global_scope_token = 0;
    if (LA() == T_COLON_COLON)
        global_scope_token = consumeToken();

    NestedNameSpecifierAST *nested_name_specifier = 0;
    parseNestedNameSpecifierOpt(nested_name_specifier,
                                /*acceptTemplateId=*/ true);

    NameAST *unqualified_name = 0;
    if (parseUnqualifiedName(unqualified_name,
                             /*acceptTemplateId=*/ acceptTemplateId || nested_name_specifier != 0)) {
        if (! global_scope_token && ! nested_name_specifier) {
            node = unqualified_name;
            return true;
        }

        QualifiedNameAST *ast = new (_pool) QualifiedNameAST;
        ast->global_scope_token = global_scope_token;
        ast->nested_name_specifier = nested_name_specifier;
        ast->unqualified_name = unqualified_name;
        node = ast;
        return true;
    }

    return false;
}

bool Parser::parseTranslationUnit(TranslationUnitAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
427
    DEBUG_THIS_RULE();
con's avatar
con committed
428
    TranslationUnitAST *ast = new (_pool) TranslationUnitAST;
Roberto Raggi's avatar
Roberto Raggi committed
429
    DeclarationListAST **decl = &ast->declarations;
con's avatar
con committed
430
431
432
433

    while (LA()) {
        unsigned start_declaration = cursor();

Roberto Raggi's avatar
Roberto Raggi committed
434
435
436
437
438
439
        DeclarationAST *declaration = 0;

        if (parseDeclaration(declaration)) {
            *decl = new (_pool) DeclarationListAST;
            (*decl)->declaration = declaration;
            decl = &(*decl)->next;
con's avatar
con committed
440
441
442
443
444
445
446
447
448
449
450
451
        } else {
            rewind(start_declaration + 1);
            skipUntilDeclaration();
        }
    }

    node = ast;
    return true;
}

bool Parser::parseEmptyDeclaration(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
452
    DEBUG_THIS_RULE();
con's avatar
con committed
453
454
455
456
457
458
459
460
461
462
463
    if (LA() == T_SEMICOLON) {
        EmptyDeclarationAST *ast = new (_pool) EmptyDeclarationAST;
        ast->semicolon_token = consumeToken();
        node = ast;
        return true;
    }
    return false;
}

bool Parser::parseDeclaration(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
464
    DEBUG_THIS_RULE();
con's avatar
con committed
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
    switch (LA()) {
    case T_SEMICOLON:
        return parseEmptyDeclaration(node);

    case T_NAMESPACE:
        return parseNamespace(node);

    case T_USING:
        return parseUsing(node);

    case T_ASM:
        return parseAsmDefinition(node);

    case T_TEMPLATE:
    case T_EXPORT:
        return parseTemplateDeclaration(node);

Roberto Raggi's avatar
Roberto Raggi committed
482
    // ObjcC++
483
    case T_AT_CLASS:
Erik Verbruggen's avatar
Erik Verbruggen committed
484
        return parseObjCClassForwardDeclaration(node);
485
486

    case T_AT_INTERFACE:
Roberto Raggi's avatar
Roberto Raggi committed
487
        return parseObjCInterface(node);
488
489

    case T_AT_PROTOCOL:
Roberto Raggi's avatar
Roberto Raggi committed
490
        return parseObjCProtocol(node);
491

492
493
494
    case T_AT_IMPLEMENTATION:
        return parseObjCImplementation(node);

Roberto Raggi's avatar
Roberto Raggi committed
495
    case T_AT_END:
Erik Verbruggen's avatar
Erik Verbruggen committed
496
497
498
499
        // TODO: should this be done here, or higher-up?
        _translationUnit->error(cursor(), "skip stray token `%s'", tok().spell());
        consumeToken();
        break;
500

Roberto Raggi's avatar
Roberto Raggi committed
501
502
503
504
505
506
507
508
509
510
511
512
513
514
    default: {
        if (_objCEnabled && LA() == T___ATTRIBUTE__) {
            const unsigned start = cursor();
            SpecifierAST *attributes = 0, **attr = &attributes;
            while (parseAttributeSpecifier(*attr))
                attr = &(*attr)->next;
            if (LA() == T_AT_INTERFACE)
                return parseObjCInterface(node, attributes);
            else if (LA() == T_AT_PROTOCOL)
                return parseObjCProtocol(node, attributes);
            else if (LA() == T_AT_PROPERTY)
                return parseObjCPropertyDeclaration(node, attributes);
            rewind(start);
        }
515

con's avatar
con committed
516
517
518
519
520
521
        if (LA() == T_EXTERN && LA(2) == T_TEMPLATE)
            return parseTemplateDeclaration(node);
        else if (LA() == T_EXTERN && LA(2) == T_STRING_LITERAL)
            return parseLinkageSpecification(node);
        else
            return parseSimpleDeclaration(node);
Roberto Raggi's avatar
Roberto Raggi committed
522
523
    }   break; // default

con's avatar
con committed
524
    } // end switch
Roberto Raggi's avatar
Roberto Raggi committed
525
526

    return false;
con's avatar
con committed
527
528
529
530
}

bool Parser::parseLinkageSpecification(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
531
    DEBUG_THIS_RULE();
con's avatar
con committed
532
533
534
    if (LA() == T_EXTERN && LA(2) == T_STRING_LITERAL) {
        LinkageSpecificationAST *ast = new (_pool) LinkageSpecificationAST;
        ast->extern_token = consumeToken();
Roberto Raggi's avatar
cleanup    
Roberto Raggi committed
535
        ast->extern_type_token = consumeToken();
con's avatar
con committed
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550

        if (LA() == T_LBRACE)
            parseLinkageBody(ast->declaration);
        else
            parseDeclaration(ast->declaration);

        node = ast;
        return true;
    }

    return false;
}

bool Parser::parseLinkageBody(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
551
    DEBUG_THIS_RULE();
con's avatar
con committed
552
553
554
    if (LA() == T_LBRACE) {
        LinkageBodyAST *ast = new (_pool) LinkageBodyAST;
        ast->lbrace_token = consumeToken();
Roberto Raggi's avatar
Roberto Raggi committed
555
        DeclarationListAST **declaration_ptr = &ast->declarations;
con's avatar
con committed
556
557
558
559
560
561

        while (int tk = LA()) {
            if (tk == T_RBRACE)
                break;

            unsigned start_declaration = cursor();
Roberto Raggi's avatar
Roberto Raggi committed
562
563
564
565
566
            DeclarationAST *declaration = 0;
            if (parseDeclaration(declaration)) {
                *declaration_ptr = new (_pool) DeclarationListAST;
                (*declaration_ptr)->declaration = declaration;
                declaration_ptr = &(*declaration_ptr)->next;
con's avatar
con committed
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
            } else {
                rewind(start_declaration + 1);
                skipUntilDeclaration();
            }
        }
        match(T_RBRACE, &ast->rbrace_token);
        node = ast;
        return true;
    }
    return false;
}

// ### rename parseNamespaceAliarOrDeclaration?
bool Parser::parseNamespace(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
582
    DEBUG_THIS_RULE();
con's avatar
con committed
583
584
585
586
587
588
589
590
591
    if (LA() != T_NAMESPACE)
        return false;

    unsigned namespace_token = consumeToken();

    if (LA() == T_IDENTIFIER && LA(2) == T_EQUAL) {
        NamespaceAliasDefinitionAST *ast =
                new (_pool) NamespaceAliasDefinitionAST;
        ast->namespace_token = namespace_token;
Roberto Raggi's avatar
cleanup    
Roberto Raggi committed
592
        ast->namespace_name_token = consumeToken();
con's avatar
con committed
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
        ast->equal_token = consumeToken();
        parseName(ast->name);
        match(T_SEMICOLON, &ast->semicolon_token);
        node = ast;
        return true;
    }

    NamespaceAST *ast = new (_pool) NamespaceAST;
    ast->namespace_token = namespace_token;
    if (LA() == T_IDENTIFIER)
        ast->identifier_token = consumeToken();
    SpecifierAST **attr_ptr = &ast->attributes;
    while (LA() == T___ATTRIBUTE__) {
        parseAttributeSpecifier(*attr_ptr);
        attr_ptr = &(*attr_ptr)->next;
    }
    if (LA() == T_LBRACE)
        parseLinkageBody(ast->linkage_body);
    node = ast;
    return true;
}

bool Parser::parseUsing(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
617
    DEBUG_THIS_RULE();
con's avatar
con committed
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
    if (LA() != T_USING)
        return false;

    if (LA(2) == T_NAMESPACE)
        return parseUsingDirective(node);

    UsingAST *ast = new (_pool) UsingAST;
    ast->using_token = consumeToken();

    if (LA() == T_TYPENAME)
        ast->typename_token = consumeToken();

    parseName(ast->name);
    match(T_SEMICOLON, &ast->semicolon_token);
    node = ast;
    return true;
}

bool Parser::parseUsingDirective(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
638
    DEBUG_THIS_RULE();
con's avatar
con committed
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
    if (LA() == T_USING && LA(2) == T_NAMESPACE) {
        UsingDirectiveAST *ast = new (_pool) UsingDirectiveAST;
        ast->using_token = consumeToken();
        ast->namespace_token = consumeToken();
        if (! parseName(ast->name))
            _translationUnit->warning(cursor(), "expected `namespace name' before `%s'",
                                      tok().spell());
        match(T_SEMICOLON, &ast->semicolon_token);
        node = ast;
        return true;
    }
    return false;
}

bool Parser::parseConversionFunctionId(NameAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
655
    DEBUG_THIS_RULE();
con's avatar
con committed
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
    if (LA() != T_OPERATOR)
        return false;
    unsigned operator_token = consumeToken();
    SpecifierAST *type_specifier = 0;
    if (! parseTypeSpecifier(type_specifier)) {
        return false;
    }
    PtrOperatorAST *ptr_operators = 0, **ptr_operators_tail = &ptr_operators;
    while (parsePtrOperator(*ptr_operators_tail))
        ptr_operators_tail = &(*ptr_operators_tail)->next;

    ConversionFunctionIdAST *ast = new (_pool) ConversionFunctionIdAST;
    ast->operator_token = operator_token;
    ast->type_specifier = type_specifier;
    ast->ptr_operators = ptr_operators;
    node = ast;
    return true;
}

bool Parser::parseOperatorFunctionId(NameAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
677
    DEBUG_THIS_RULE();
con's avatar
con committed
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
    if (LA() != T_OPERATOR)
        return false;
    unsigned operator_token = consumeToken();

    OperatorAST *op = 0;
    if (! parseOperator(op))
        return false;

    OperatorFunctionIdAST *ast = new (_pool) OperatorFunctionIdAST;
    ast->operator_token = operator_token;
    ast->op = op;
    node = ast;
    return true;
}

693
694
695
696
697
698
699
700
701
702
703
Parser::TemplateArgumentListEntry *Parser::templateArgumentListEntry(unsigned tokenIndex)
{
    for (unsigned i = 0; i < _templateArgumentList.size(); ++i) {
        TemplateArgumentListEntry *entry = &_templateArgumentList[i];
        if (entry->index == tokenIndex)
            return entry;
    }

    return 0;
}

con's avatar
con committed
704
705
bool Parser::parseTemplateArgumentList(TemplateArgumentListAST *&node)
{
706
707
    if (TemplateArgumentListEntry *entry = templateArgumentListEntry(cursor())) {
        rewind(entry->cursor);
Roberto Raggi's avatar
Roberto Raggi committed
708
709
        node = entry->ast;
        return entry->ast != 0;
710
711
712
713
    }

    unsigned start = cursor();

Roberto Raggi's avatar
Roberto Raggi committed
714
    DEBUG_THIS_RULE();
con's avatar
con committed
715
716
717
718
719
720
721
    TemplateArgumentListAST **template_argument_ptr = &node;
    ExpressionAST *template_argument = 0;
    if (parseTemplateArgument(template_argument)) {
        *template_argument_ptr = new (_pool) TemplateArgumentListAST;
        (*template_argument_ptr)->template_argument = template_argument;
        template_argument_ptr = &(*template_argument_ptr)->next;
        while (LA() == T_COMMA) {
722
            unsigned comma_token = consumeToken();
con's avatar
con committed
723
724
725

            if (parseTemplateArgument(template_argument)) {
                *template_argument_ptr = new (_pool) TemplateArgumentListAST;
726
                (*template_argument_ptr)->comma_token = comma_token;
con's avatar
con committed
727
728
729
730
                (*template_argument_ptr)->template_argument = template_argument;
                template_argument_ptr = &(*template_argument_ptr)->next;
            }
        }
731
732

        _templateArgumentList.push_back(TemplateArgumentListEntry(start, cursor(), node));
con's avatar
con committed
733
734
        return true;
    }
735
736
737

    _templateArgumentList.push_back(TemplateArgumentListEntry(start, cursor(), 0));

con's avatar
con committed
738
739
740
741
742
    return false;
}

bool Parser::parseAsmDefinition(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
743
    DEBUG_THIS_RULE();
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
    if (LA() != T_ASM)
        return false;

    AsmDefinitionAST *ast = new (_pool) AsmDefinitionAST;
    ast->asm_token = consumeToken();

    if (LA() == T_VOLATILE)
        ast->volatile_token = consumeToken();

    match(T_LPAREN, &ast->lparen_token);
    unsigned string_literal_token = 0;
    match(T_STRING_LITERAL, &string_literal_token);
    while (LA() == T_STRING_LITERAL) {
        consumeToken();
    }
    if (LA() == T_COLON) {
        consumeToken(); // skip T_COLON
        parseAsmOperandList();
        if (LA() == T_COLON) {
            consumeToken();
            parseAsmOperandList();
            if (LA() == T_COLON) {
                consumeToken();
                parseAsmClobberList();
            }
        } else if (LA() == T_COLON_COLON) {
            consumeToken();
            parseAsmClobberList();
        }
    } else if (LA() == T_COLON_COLON) {
        consumeToken();
        parseAsmClobberList();
    }
    match(T_RPAREN, &ast->rparen_token);
    match(T_SEMICOLON, &ast->semicolon_token);
    node = ast;
    return true;
}

bool Parser::parseAsmOperandList()
{
Roberto Raggi's avatar
Roberto Raggi committed
785
    DEBUG_THIS_RULE();
786
787
788
    if (LA() != T_STRING_LITERAL)
        return true;

789
790
791
792
    if (parseAsmOperand()) {
        while (LA() == T_COMMA) {
            consumeToken();
            parseAsmOperand();
con's avatar
con committed
793
794
795
        }
        return true;
    }
796

con's avatar
con committed
797
798
799
    return false;
}

800
801
bool Parser::parseAsmOperand()
{
Roberto Raggi's avatar
Roberto Raggi committed
802
    DEBUG_THIS_RULE();
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
    unsigned string_literal_token = 0;
    match(T_STRING_LITERAL, &string_literal_token);

    if (LA() == T_LBRACKET) {
        /*unsigned lbracket_token = */ consumeToken();
        match(T_STRING_LITERAL, &string_literal_token);
        unsigned rbracket_token = 0;
        match(T_RBRACKET, &rbracket_token);
    }

    unsigned lparen_token = 0, rparen_token = 0;
    match(T_LPAREN, &lparen_token);
    ExpressionAST *expression = 0;
    parseExpression(expression);
    match(T_RPAREN, &rparen_token);
    return true;
}

bool Parser::parseAsmClobberList()
{
Roberto Raggi's avatar
Roberto Raggi committed
823
    DEBUG_THIS_RULE();
824
825
826
827
828
829
830
831
832
833
834
835
836
    if (LA() != T_STRING_LITERAL)
        return false;

    unsigned string_literal_token = consumeToken();

    while (LA() == T_COMMA) {
        consumeToken();
        match(T_STRING_LITERAL, &string_literal_token);
    }

    return true;
}

con's avatar
con committed
837
838
bool Parser::parseTemplateDeclaration(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
839
    DEBUG_THIS_RULE();
con's avatar
con committed
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
    if (! (LA(1) == T_TEMPLATE || ((LA(1) == T_EXPORT || LA(1) == T_EXTERN)
            && LA(2) == T_TEMPLATE)))
        return false;

    TemplateDeclarationAST *ast = new (_pool) TemplateDeclarationAST;

    if (LA() == T_EXPORT || LA() == T_EXPORT)
        ast->export_token = consumeToken();

    ast->template_token = consumeToken();

    if (LA() == T_LESS) {
        ast->less_token = consumeToken();
        if (LA() == T_GREATER || parseTemplateParameterList(ast->template_parameters))
            match(T_GREATER, &ast->greater_token);
    }

    parseDeclaration(ast->declaration);
    node = ast;
    return true;
}

bool Parser::parseOperator(OperatorAST *&node) // ### FIXME
{
Roberto Raggi's avatar
Roberto Raggi committed
864
    DEBUG_THIS_RULE();
con's avatar
con committed
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
    OperatorAST *ast = new (_pool) OperatorAST;

    switch (LA()) {
    case T_NEW:
    case T_DELETE: {
        ast->op_token = consumeToken();
        if (LA() == T_LBRACKET) {
            ast->open_token = consumeToken();
            match(T_RBRACKET, &ast->close_token);
        }
    } break;

    case T_PLUS:
    case T_MINUS:
    case T_STAR:
    case T_SLASH:
    case T_PERCENT:
    case T_CARET:
    case T_AMPER:
    case T_PIPE:
    case T_TILDE:
    case T_EXCLAIM:
    case T_LESS:
    case T_GREATER:
    case T_COMMA:
    case T_AMPER_EQUAL:
    case T_CARET_EQUAL:
    case T_SLASH_EQUAL:
    case T_EQUAL:
    case T_EQUAL_EQUAL:
    case T_EXCLAIM_EQUAL:
    case T_GREATER_EQUAL:
    case T_GREATER_GREATER_EQUAL:
    case T_LESS_EQUAL:
    case T_LESS_LESS_EQUAL:
    case T_MINUS_EQUAL:
    case T_PERCENT_EQUAL:
    case T_PIPE_EQUAL:
    case T_PLUS_EQUAL:
    case T_STAR_EQUAL:
    case T_TILDE_EQUAL:
    case T_LESS_LESS:
    case T_GREATER_GREATER:
    case T_AMPER_AMPER:
    case T_PIPE_PIPE:
    case T_PLUS_PLUS:
    case T_MINUS_MINUS:
    case T_ARROW_STAR:
    case T_DOT_STAR:
    case T_ARROW:
        ast->op_token = consumeToken();
        break;

    default:
        if (LA() == T_LPAREN && LA(2) == T_RPAREN) {
            ast->op_token = ast->open_token = consumeToken();
            ast->close_token = consumeToken();
        } else if (LA() == T_LBRACKET && LA(2) == T_RBRACKET) {
            ast->op_token = ast->open_token = consumeToken();
            ast->close_token = consumeToken();
        } else {
            return false;
        }
    }

    node = ast;
    return true;
}

bool Parser::parseCvQualifiers(SpecifierAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
936
    DEBUG_THIS_RULE();
con's avatar
con committed
937
938
939
940
941
942
943
944
945
946
947
    unsigned start = cursor();
    SpecifierAST **ast = &node;
    while (*ast)
        ast = &(*ast)->next;

    while (int tk = LA()) {
        if (tk == T_CONST || tk == T_VOLATILE) {
            SimpleSpecifierAST *spec = new (_pool) SimpleSpecifierAST;
            spec->specifier_token = consumeToken();
            *ast = spec;
            ast = &(*ast)->next;
948
949
950
        } else if(LA() == T___ATTRIBUTE__) {
            parseAttributeSpecifier(*ast);
            ast = &(*ast)->next;
con's avatar
con committed
951
952
953
954
955
956
957
958
959
960
        } else {
            break;
        }
    }

    return start != cursor();
}

bool Parser::parsePtrOperator(PtrOperatorAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
961
    DEBUG_THIS_RULE();
con's avatar
con committed
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
    if (LA() == T_AMPER) {
        ReferenceAST *ast = new (_pool) ReferenceAST;
        ast->amp_token = consumeToken();
        node = ast;
        return true;
    } else if (LA() == T_STAR) {
        PointerAST *ast = new (_pool) PointerAST;
        ast->star_token = consumeToken();
        parseCvQualifiers(ast->cv_qualifier_seq);
        node = ast;
        return true;
    } else if (LA() == T_COLON_COLON || LA() == T_IDENTIFIER) {
        unsigned scope_or_identifier_token = cursor();

        unsigned global_scope_token = 0;
        if (LA() == T_COLON_COLON)
            global_scope_token = consumeToken();

        NestedNameSpecifierAST *nested_name_specifier = 0;
        bool has_nested_name_specifier = parseNestedNameSpecifier(
                nested_name_specifier, true);
        if (has_nested_name_specifier && LA() == T_STAR) {
            PointerToMemberAST *ast = new (_pool) PointerToMemberAST;
            ast->global_scope_token = global_scope_token;
            ast->nested_name_specifier = nested_name_specifier;
            ast->star_token = consumeToken();
            parseCvQualifiers(ast->cv_qualifier_seq);
            node = ast;
            return true;
        }
        rewind(scope_or_identifier_token);
    }
    return false;
}

bool Parser::parseTemplateArgument(ExpressionAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
999
    DEBUG_THIS_RULE();
con's avatar
con committed
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
    unsigned start = cursor();
    if (parseTypeId(node) && (LA() == T_COMMA || LA() == T_GREATER))
        return true;

    rewind(start);
    bool previousTemplateArguments = switchTemplateArguments(true);
    bool parsed = parseLogicalOrExpression(node);
    (void) switchTemplateArguments(previousTemplateArguments);
    return parsed;
}

bool Parser::parseDeclSpecifierSeq(SpecifierAST *&decl_specifier_seq,
                                   bool onlyTypeSpecifiers,
                                   bool simplified)
{
Roberto Raggi's avatar
Roberto Raggi committed
1015
    DEBUG_THIS_RULE();
con's avatar
con committed
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
    bool has_type_specifier = false;
    NameAST *named_type_specifier = 0;
    SpecifierAST **decl_specifier_seq_ptr = &decl_specifier_seq;
    for (;;) {
        if (lookAtCVQualifier()) {
            SimpleSpecifierAST *spec = new (_pool) SimpleSpecifierAST;
            spec->specifier_token = consumeToken();
            *decl_specifier_seq_ptr = spec;
            decl_specifier_seq_ptr = &(*decl_specifier_seq_ptr)->next;
        } else if (! onlyTypeSpecifiers && lookAtStorageClassSpecifier()) {
            SimpleSpecifierAST *spec = new (_pool) SimpleSpecifierAST;
            spec->specifier_token = consumeToken();
            *decl_specifier_seq_ptr = spec;
            decl_specifier_seq_ptr = &(*decl_specifier_seq_ptr)->next;
        } else if (! named_type_specifier && lookAtBuiltinTypeSpecifier()) {
            parseBuiltinTypeSpecifier(*decl_specifier_seq_ptr);
            decl_specifier_seq_ptr = &(*decl_specifier_seq_ptr)->next;
            has_type_specifier = true;
        } else if (! has_type_specifier && (LA() == T_COLON_COLON ||
                                            LA() == T_IDENTIFIER)) {
            if (! parseName(named_type_specifier))
                return false;
            NamedTypeSpecifierAST *spec = new (_pool) NamedTypeSpecifierAST;
            spec->name = named_type_specifier;
            *decl_specifier_seq_ptr = spec;
            decl_specifier_seq_ptr = &(*decl_specifier_seq_ptr)->next;
            has_type_specifier = true;
        } else if (! simplified && ! has_type_specifier && (LA() == T_TYPENAME ||
                                                            LA() == T_ENUM     ||
                                                            lookAtClassKey())) {
            unsigned startOfElaboratedTypeSpecifier = cursor();
            if (! parseElaboratedTypeSpecifier(*decl_specifier_seq_ptr)) {
                _translationUnit->error(startOfElaboratedTypeSpecifier,
                                        "expected an elaborated type specifier");
                break;
            }
            decl_specifier_seq_ptr = &(*decl_specifier_seq_ptr)->next;
            has_type_specifier = true;
        } else
            break;
    }

    return decl_specifier_seq != 0;
}

bool Parser::parseDeclaratorOrAbstractDeclarator(DeclaratorAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1063
    DEBUG_THIS_RULE();
con's avatar
con committed
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
    unsigned start = cursor();
    bool blocked = blockErrors(true);
    if (parseDeclarator(node)) {
        blockErrors(blocked);
        return true;
    }
    blockErrors(blocked);
    rewind(start);
    return parseAbstractDeclarator(node);
}

bool Parser::parseCoreDeclarator(DeclaratorAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1077
    DEBUG_THIS_RULE();
1078
1079
1080
1081
1082
1083
1084
1085
    unsigned start = cursor();
    SpecifierAST *attributes = 0;
    SpecifierAST **attribute_ptr = &attributes;
    while (LA() == T___ATTRIBUTE__) {
        parseAttributeSpecifier(*attribute_ptr);
        attribute_ptr = &(*attribute_ptr)->next;
    }

con's avatar
con committed
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
    PtrOperatorAST *ptr_operators = 0, **ptr_operators_tail = &ptr_operators;
    while (parsePtrOperator(*ptr_operators_tail))
        ptr_operators_tail = &(*ptr_operators_tail)->next;

    if (LA() == T_COLON_COLON || LA() == T_IDENTIFIER || LA() == T_TILDE
            || LA() == T_OPERATOR) {
        NameAST *name = 0;
        if (parseName(name)) {
            DeclaratorIdAST *declarator_id = new (_pool) DeclaratorIdAST;
            declarator_id->name = name;
            DeclaratorAST *ast = new (_pool) DeclaratorAST;
1097
            ast->attributes = attributes;
con's avatar
con committed
1098
1099
1100
1101
1102
1103
            ast->ptr_operators = ptr_operators;
            ast->core_declarator = declarator_id;
            node = ast;
            return true;
        }
    } else if (LA() == T_LPAREN) {
1104
1105
1106
        if (attributes)
            _translationUnit->warning(attributes->firstToken(), "unexpected attribtues");

con's avatar
con committed
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
        unsigned lparen_token = consumeToken();
        DeclaratorAST *declarator = 0;
        if (parseDeclarator(declarator) && LA() == T_RPAREN) {
            NestedDeclaratorAST *nested_declarator = new (_pool) NestedDeclaratorAST;
            nested_declarator->lparen_token = lparen_token;
            nested_declarator->declarator = declarator;
            nested_declarator->rparen_token = consumeToken();
            DeclaratorAST *ast = new (_pool) DeclaratorAST;
            ast->ptr_operators = ptr_operators;
            ast->core_declarator = nested_declarator;
            node = ast;
            return true;
        }
    }
1121
    rewind(start);
con's avatar
con committed
1122
1123
1124
    return false;
}

1125
bool Parser::parseDeclarator(DeclaratorAST *&node, bool stopAtCppInitializer)
con's avatar
con committed
1126
{
Roberto Raggi's avatar
Roberto Raggi committed
1127
    DEBUG_THIS_RULE();
con's avatar
con committed
1128
1129
1130
1131
1132
1133
1134
1135
1136
    if (! parseCoreDeclarator(node))
        return false;

    PostfixDeclaratorAST **postfix_ptr = &node->postfix_declarators;

    for (;;) {
        unsigned startOfPostDeclarator = cursor();

        if (LA() == T_LPAREN) {
1137
1138
1139
1140
1141
            if (stopAtCppInitializer) {
                unsigned lparen_token = cursor();
                ExpressionAST *initializer = 0;

                bool blocked = blockErrors(true);
1142
                if (parseInitializer(initializer, &node->equals_token)) {
1143
1144
1145
                    if (NestedExpressionAST *expr = initializer->asNestedExpression()) {
                        if (expr->expression && expr->rparen_token && (LA() == T_COMMA || LA() == T_SEMICOLON)) {
                            rewind(lparen_token);
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166

                            // check for ambiguous declarators.

                            consumeToken();
                            ParameterDeclarationClauseAST *parameter_declaration_clause = 0;
                            if (parseParameterDeclarationClause(parameter_declaration_clause) && LA() == T_RPAREN) {
                                unsigned rparen_token = consumeToken();

                                FunctionDeclaratorAST *ast = new (_pool) FunctionDeclaratorAST;
                                ast->lparen_token = lparen_token;
                                ast->parameters = parameter_declaration_clause;
                                ast->as_cpp_initializer = initializer;
                                ast->rparen_token = rparen_token;
                                *postfix_ptr = ast;
                                postfix_ptr = &(*postfix_ptr)->next;

                                blockErrors(blocked);
                                return true;
                            }


1167
                            blockErrors(blocked);
1168
                            rewind(lparen_token);
1169
1170
1171
1172
1173
1174
1175
1176
1177
                            return true;
                        }
                    }
                }

                blockErrors(blocked);
                rewind(lparen_token);
            }

con's avatar
con committed
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
            FunctionDeclaratorAST *ast = new (_pool) FunctionDeclaratorAST;
            ast->lparen_token = consumeToken();
            parseParameterDeclarationClause(ast->parameters);
            if (LA() != T_RPAREN) {
                rewind(startOfPostDeclarator);
                break;
            }

            ast->rparen_token = consumeToken();
            parseCvQualifiers(ast->cv_qualifier_seq);
            parseExceptionSpecification(ast->exception_specification);
            *postfix_ptr = ast;
            postfix_ptr = &(*postfix_ptr)->next;
        } else if (LA() == T_LBRACKET) {
            ArrayDeclaratorAST *ast = new (_pool) ArrayDeclaratorAST;
            ast->lbracket_token = consumeToken();
            if (LA() == T_RBRACKET || parseConstantExpression(ast->expression)) {
                match(T_RBRACKET, &ast->rbracket_token);
            }
            *postfix_ptr = ast;
            postfix_ptr = &(*postfix_ptr)->next;
        } else
            break;
    }

1203
1204
1205
1206
1207
1208
1209
1210
    if (LA() == T___ASM__ && LA(2) == T_LPAREN) { // ### store the asm specifier in the AST
        consumeToken(); // skip __asm__
        consumeToken(); // skip T_LPAREN

        if (skipUntil(T_RPAREN))
            consumeToken(); // skip T_RPAREN
    }

1211
    SpecifierAST **spec_ptr = &node->post_attributes;
con's avatar
con committed
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
    while (LA() == T___ATTRIBUTE__) {
        parseAttributeSpecifier(*spec_ptr);
        spec_ptr = &(*spec_ptr)->next;
    }

    return true;
}

bool Parser::parseAbstractCoreDeclarator(DeclaratorAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1222
    DEBUG_THIS_RULE();
con's avatar
con committed
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
    PtrOperatorAST *ptr_operators = 0, **ptr_operators_tail = &ptr_operators;
    while (parsePtrOperator(*ptr_operators_tail))
        ptr_operators_tail = &(*ptr_operators_tail)->next;

    unsigned after_ptr_operators = cursor();

    if (LA() == T_LPAREN) {
        unsigned lparen_token = consumeToken();
        DeclaratorAST *declarator = 0;
        if (parseAbstractDeclarator(declarator) && LA() == T_RPAREN) {
            NestedDeclaratorAST *nested_declarator = new (_pool) NestedDeclaratorAST;
            nested_declarator->lparen_token = lparen_token;
            nested_declarator->declarator = declarator;
            nested_declarator->rparen_token = consumeToken();
            DeclaratorAST *ast = new (_pool) DeclaratorAST;
            ast->ptr_operators = ptr_operators;
            ast->core_declarator = nested_declarator;
            node = ast;
            return true;
        }
    }

    rewind(after_ptr_operators);
    if (ptr_operators) {
        DeclaratorAST *ast = new (_pool) DeclaratorAST;
        ast->ptr_operators = ptr_operators;
        node = ast;
    }

    return true;
}

bool Parser::parseAbstractDeclarator(DeclaratorAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1257
    DEBUG_THIS_RULE();
con's avatar
con committed
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
    if (! parseAbstractCoreDeclarator(node))
        return false;

    PostfixDeclaratorAST *postfix_declarators = 0,
        **postfix_ptr = &postfix_declarators;

    for (;;) {
        if (LA() == T_LPAREN) {
            FunctionDeclaratorAST *ast = new (_pool) FunctionDeclaratorAST;
            ast->lparen_token = consumeToken();
            if (LA() == T_RPAREN || parseParameterDeclarationClause(ast->parameters)) {
                if (LA() == T_RPAREN)
                    ast->rparen_token = consumeToken();
            }
            parseCvQualifiers(ast->cv_qualifier_seq);
            parseExceptionSpecification(ast->exception_specification);
            *postfix_ptr = ast;
            postfix_ptr = &(*postfix_ptr)->next;
        } else if (LA() == T_LBRACKET) {
            ArrayDeclaratorAST *ast = new (_pool) ArrayDeclaratorAST;
            ast->lbracket_token = consumeToken();
            if (LA() == T_RBRACKET || parseConstantExpression(ast->expression)) {
                if (LA() == T_RBRACKET)
                    ast->rbracket_token = consumeToken();
            }
            *postfix_ptr = ast;
            postfix_ptr = &(*postfix_ptr)->next;
        } else
            break;
    }

    if (postfix_declarators) {
        if (! node)
            node = new (_pool) DeclaratorAST;

        node->postfix_declarators = postfix_declarators;
    }

    return true;
}

bool Parser::parseEnumSpecifier(SpecifierAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1301
    DEBUG_THIS_RULE();
con's avatar
con committed
1302
1303
1304
1305
1306
1307
1308
1309
1310
    if (LA() == T_ENUM) {
        unsigned enum_token = consumeToken();
        NameAST *name = 0;
        parseName(name);
        if (LA() == T_LBRACE) {
            EnumSpecifierAST *ast = new (_pool) EnumSpecifierAST;
            ast->enum_token = enum_token;
            ast->name = name;
            ast->lbrace_token = consumeToken();
1311
            unsigned comma_token = 0;
con's avatar
con committed
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
            EnumeratorAST **enumerator_ptr = &ast->enumerators;
            while (int tk = LA()) {
                if (tk == T_RBRACE)
                    break;

                if (LA() != T_IDENTIFIER) {
                    _translationUnit->error(cursor(), "expected identifier before '%s'", tok().spell());
                    skipUntil(T_IDENTIFIER);
                }

1322
1323
                if (parseEnumerator(*enumerator_ptr)) {
                    (*enumerator_ptr)->comma_token = comma_token;
con's avatar
con committed
1324
                    enumerator_ptr = &(*enumerator_ptr)->next;
1325
                }
con's avatar
con committed
1326

1327
                if (LA() != T_RBRACE)
con's avatar
con committed
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
                    match(T_COMMA, &comma_token);
            }
            match(T_RBRACE, &ast->rbrace_token);
            node = ast;
            return true;
        }
    }
    return false;
}

Roberto Raggi's avatar
Roberto Raggi committed
1338
bool Parser::parseTemplateParameterList(DeclarationListAST *&node)
con's avatar
con committed
1339
{
Roberto Raggi's avatar
Roberto Raggi committed
1340
    DEBUG_THIS_RULE();
Roberto Raggi's avatar
Roberto Raggi committed
1341
1342
1343
1344
1345
    DeclarationListAST **template_parameter_ptr = &node;
    DeclarationAST *declaration = 0;
    if (parseTemplateParameter(declaration)) {
        *template_parameter_ptr = new (_pool) DeclarationListAST;
        (*template_parameter_ptr)->declaration = declaration;
con's avatar
con committed
1346
        template_parameter_ptr = &(*template_parameter_ptr)->next;
Roberto Raggi's avatar
Roberto Raggi committed
1347

con's avatar
con committed
1348
        while (LA() == T_COMMA) {
1349
            consumeToken(); // XXX Store this token somewhere
con's avatar
con committed
1350

Roberto Raggi's avatar
Roberto Raggi committed
1351
1352
1353
1354
            declaration = 0;
            if (parseTemplateParameter(declaration)) {
                *template_parameter_ptr = new (_pool) DeclarationListAST;
                (*template_parameter_ptr)->declaration = declaration;
con's avatar
con committed
1355
                template_parameter_ptr = &(*template_parameter_ptr)->next;
Roberto Raggi's avatar
Roberto Raggi committed
1356
            }
con's avatar
con committed
1357
1358
1359
1360
1361
1362
1363
1364
        }
        return true;
    }
    return false;
}

bool Parser::parseTemplateParameter(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1365
    DEBUG_THIS_RULE();
con's avatar
con committed
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
    if (parseTypeParameter(node))
        return true;
    bool previousTemplateArguments = switchTemplateArguments(true);
    bool parsed = parseParameterDeclaration(node);
    (void) switchTemplateArguments(previousTemplateArguments);
    return parsed;
}

bool Parser::parseTypenameTypeParameter(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1376
    DEBUG_THIS_RULE();
con's avatar
con committed
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
    if (LA() == T_CLASS || LA() == T_TYPENAME) {
        TypenameTypeParameterAST *ast = new (_pool) TypenameTypeParameterAST;
        ast->classkey_token = consumeToken();
        parseName(ast->name);
        if (LA() == T_EQUAL) {
            ast->equal_token = consumeToken();
            parseTypeId(ast->type_id);
        }
        node = ast;
        return true;
    }
    return false;
}

bool Parser::parseTemplateTypeParameter(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1393
    DEBUG_THIS_RULE();
con's avatar
con committed
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
    if (LA() == T_TEMPLATE) {
        TemplateTypeParameterAST *ast = new (_pool) TemplateTypeParameterAST;
        ast->template_token = consumeToken();
        if (LA() == T_LESS)
            ast->less_token = consumeToken();
        parseTemplateParameterList(ast->template_parameters);
        if (LA() == T_GREATER)
            ast->greater_token = consumeToken();
        if (LA() == T_CLASS)
            ast->class_token = consumeToken();

        // parse optional name
        parseName(ast->name);

        if (LA() == T_EQUAL) {
            ast->equal_token = consumeToken();
            parseTypeId(ast->type_id);
        }
        node = ast;
        return true;
    }
    return false;
}

bool Parser::parseTypeParameter(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1420
    DEBUG_THIS_RULE();
con's avatar
con committed
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
    if (LA() == T_CLASS || LA() == T_TYPENAME)
        return parseTypenameTypeParameter(node);
    else if (LA() == T_TEMPLATE)
        return parseTemplateTypeParameter(node);
    else
        return false;
}

bool Parser::parseTypeId(ExpressionAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1431
    DEBUG_THIS_RULE();
con's avatar
con committed
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
    SpecifierAST *type_specifier = 0;
    if (parseTypeSpecifier(type_specifier)) {
        TypeIdAST *ast = new (_pool) TypeIdAST;
        ast->type_specifier = type_specifier;
        parseAbstractDeclarator(ast->declarator);
        node = ast;
        return true;
    }
    return false;
}

bool Parser::parseParameterDeclarationClause(ParameterDeclarationClauseAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1445
    DEBUG_THIS_RULE();
1446
1447
1448
    if (LA() == T_RPAREN)
        return true; // nothing to do

Roberto Raggi's avatar
Roberto Raggi committed
1449
    DeclarationListAST *parameter_declarations = 0;
1450

con's avatar
con committed
1451
    unsigned dot_dot_dot_token = 0;
1452
    if (LA() == T_DOT_DOT_DOT)
con's avatar
con committed
1453
        dot_dot_dot_token = consumeToken();
1454
1455
1456
1457
1458
1459
1460
1461
1462
    else {
        parseParameterDeclarationList(parameter_declarations);

        if (LA() == T_DOT_DOT_DOT) {
            dot_dot_dot_token = consumeToken();
        } else if (LA() == T_COMMA && LA(2) == T_DOT_DOT_DOT) {
            consumeToken(); // skip comma
            dot_dot_dot_token = consumeToken();
        }
con's avatar
con committed
1463
    }
1464
1465
1466
1467
1468
1469
1470
1471

    if (parameter_declarations || dot_dot_dot_token) {
        ParameterDeclarationClauseAST *ast = new (_pool) ParameterDeclarationClauseAST;
        ast->parameter_declarations = parameter_declarations;
        ast->dot_dot_dot_token = dot_dot_dot_token;
        node = ast;
    }

con's avatar
con committed
1472
1473
1474
    return true;
}

Roberto Raggi's avatar
Roberto Raggi committed
1475
bool Parser::parseParameterDeclarationList(DeclarationListAST *&node)
con's avatar
con committed
1476
{
Roberto Raggi's avatar
Roberto Raggi committed
1477
    DEBUG_THIS_RULE();
1478
1479
1480
    if (LA() == T_DOT_DOT_DOT || (LA() == T_COMMA && LA(2) == T_DOT_DOT_DOT))
        return false; // nothing to do.

Roberto Raggi's avatar
Roberto Raggi committed
1481
1482
1483
1484
1485
    DeclarationListAST **parameter_declaration_ptr = &node;
    DeclarationAST *declaration = 0;
    if (parseParameterDeclaration(declaration)) {
        *parameter_declaration_ptr = new (_pool) DeclarationListAST;
        (*parameter_declaration_ptr)->declaration = declaration;
con's avatar
con committed
1486
1487
1488
1489
1490
1491
1492
        parameter_declaration_ptr = &(*parameter_declaration_ptr)->next;
        while (LA() == T_COMMA) {
            consumeToken();

            if (LA() == T_DOT_DOT_DOT)
                break;

Roberto Raggi's avatar
Roberto Raggi committed
1493
1494
1495
1496
            declaration = 0;
            if (parseParameterDeclaration(declaration)) {
                *parameter_declaration_ptr = new (_pool) DeclarationListAST;
                (*parameter_declaration_ptr)->declaration = declaration;
con's avatar
con committed
1497
                parameter_declaration_ptr = &(*parameter_declaration_ptr)->next;
Roberto Raggi's avatar
Roberto Raggi committed
1498
            }
con's avatar
con committed
1499
1500
1501
1502
1503
1504
1505
1506
        }
        return true;
    }
    return false;
}

bool Parser::parseParameterDeclaration(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1507
    DEBUG_THIS_RULE();
con's avatar
con committed
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
    SpecifierAST *decl_specifier_seq = 0;
    if (parseDeclSpecifierSeq(decl_specifier_seq)) {
        ParameterDeclarationAST *ast = new (_pool) ParameterDeclarationAST;
        ast->type_specifier = decl_specifier_seq;
        parseDeclaratorOrAbstractDeclarator(ast->declarator);
        if (LA() == T_EQUAL) {
            ast->equal_token = consumeToken();
            parseLogicalOrExpression(ast->expression);
        }

        node = ast;
        return true;
    }
    return false;
}

bool Parser::parseClassSpecifier(SpecifierAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1526
    DEBUG_THIS_RULE();
con's avatar
con committed
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
    if (! lookAtClassKey())
        return false;

    unsigned classkey_token = consumeToken();

    SpecifierAST *attributes = 0, **attr_ptr = &attributes;
    while (LA() == T___ATTRIBUTE__) {
        parseAttributeSpecifier(*attr_ptr);
        attr_ptr = &(*attr_ptr)->next;
    }

    if (LA(1) == T_IDENTIFIER && LA(2) == T_IDENTIFIER) {
        _translationUnit->warning(cursor(), "skip identifier `%s'",
                                  tok().spell());
        consumeToken();
    }

    NameAST *name = 0;
    parseName(name);

1547
1548
1549
1550
1551
    bool parsed = false;

    const bool previousInFunctionBody = _inFunctionBody;
    _inFunctionBody = false;

1552
1553
    unsigned colon_token = 0;

con's avatar
con committed
1554
1555
1556
    if (LA() == T_COLON || LA() == T_LBRACE) {
        BaseSpecifierAST *base_clause = 0;
        if (LA() == T_COLON) {
1557
            colon_token = cursor();
con's avatar
con committed
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
            parseBaseClause(base_clause);
            if (LA() != T_LBRACE) {
                _translationUnit->error(cursor(), "expected `{' before `%s'", tok().spell());
                unsigned saved = cursor();
                for (int n = 0; n < 3 && LA() != T_EOF_SYMBOL; ++n, consumeToken()) {
                    if (LA() == T_LBRACE)
                        break;
                }
                if (LA() != T_LBRACE)
                    rewind(saved);
            }
        }

        ClassSpecifierAST *ast = new (_pool) ClassSpecifierAST;
        ast->classkey_token = classkey_token;
        ast->attributes = attributes;
        ast->name = name;
1575
        ast->colon_token = colon_token;
con's avatar
con committed
1576
1577
1578
1579
1580
        ast->base_clause = base_clause;

        if (LA() == T_LBRACE)
            ast->lbrace_token = consumeToken();

Roberto Raggi's avatar
Roberto Raggi committed
1581
        DeclarationListAST **declaration_ptr = &ast->member_specifiers;
con's avatar
con committed
1582
1583
1584
1585
1586
1587
1588
        while (int tk = LA()) {
            if (tk == T_RBRACE) {
                ast->rbrace_token = consumeToken();
                break;
            }

            unsigned start_declaration = cursor();
Roberto Raggi's avatar
Roberto Raggi committed
1589
1590
1591
1592
1593
            DeclarationAST *declaration = 0;
            if (parseMemberSpecification(declaration)) {
                *declaration_ptr = new (_pool) DeclarationListAST;
                (*declaration_ptr)->declaration = declaration;
                declaration_ptr = &(*declaration_ptr)->next;
con's avatar
con committed
1594
1595
1596
1597
1598
1599
            } else {
                rewind(start_declaration + 1);
                skipUntilDeclaration();
            }
        }
        node = ast;
1600
        parsed = true;
con's avatar
con committed
1601
    }
1602
1603
1604
1605

    _inFunctionBody = previousInFunctionBody;

    return parsed;
con's avatar
con committed
1606
1607
1608
1609
}

bool Parser::parseAccessSpecifier(SpecifierAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1610
    DEBUG_THIS_RULE();
con's avatar
con committed
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
    switch (LA()) {
    case T_PUBLIC:
    case T_PROTECTED:
    case T_PRIVATE: {
        SimpleSpecifierAST *ast = new (_pool) SimpleSpecifierAST;
        ast->specifier_token = consumeToken();
        node = ast;
        return true;
    }

    default:
        return false;
    } // switch
}

bool Parser::parseAccessDeclaration(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1628
    DEBUG_THIS_RULE();
1629
1630
    if (LA() == T_PUBLIC || LA() == T_PROTECTED || LA() == T_PRIVATE || LA() == T_Q_SIGNALS) {
        bool isSignals = LA() == T_Q_SIGNALS;
con's avatar
con committed
1631
1632
        AccessDeclarationAST *ast = new (_pool) AccessDeclarationAST;
        ast->access_specifier_token = consumeToken();
1633
        if (! isSignals && LA() == T_Q_SLOTS)
con's avatar
con committed
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
            ast->slots_token = consumeToken();
        match(T_COLON, &ast->colon_token);
        node = ast;
        return true;
    }
    return false;
}

bool Parser::parseMemberSpecification(DeclarationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1644
    DEBUG_THIS_RULE();
con's avatar
con committed
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
    switch (LA()) {
    case T_SEMICOLON:
        return parseEmptyDeclaration(node);

    case T_USING:
        return parseUsing(node);

    case T_TEMPLATE:
        return parseTemplateDeclaration(node);

1655
    case T_Q_SIGNALS:
con's avatar
con committed
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
    case T_PUBLIC:
    case T_PROTECTED:
    case T_PRIVATE:
        return parseAccessDeclaration(node);

    default:
        return parseSimpleDeclaration(node, /*acceptStructDeclarator=*/true);
    } // switch
}

bool Parser::parseCtorInitializer(CtorInitializerAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1668
    DEBUG_THIS_RULE();
con's avatar
con committed
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
    if (LA() == T_COLON) {
        unsigned colon_token = consumeToken();

        CtorInitializerAST *ast = new (_pool) CtorInitializerAST;
        ast->colon_token = colon_token;

        parseMemInitializerList(ast->member_initializers);
        node = ast;
        return true;
    }
    return false;
}

bool Parser::parseElaboratedTypeSpecifier(SpecifierAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1684
    DEBUG_THIS_RULE();
con's avatar
con committed
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
    if (lookAtClassKey() || LA() == T_ENUM || LA() == T_TYPENAME) {
        unsigned classkey_token = consumeToken();
        NameAST *name = 0;
        if (parseName(name)) {
            ElaboratedTypeSpecifierAST *ast =
                    new (_pool) ElaboratedTypeSpecifierAST;

            ast->classkey_token = classkey_token;
            ast->name = name;
            node = ast;
            return true;
        }
    }
    return false;
}

bool Parser::parseExceptionSpecification(ExceptionSpecificationAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1703
    DEBUG_THIS_RULE();
con's avatar
con committed
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
    if (LA() == T_THROW) {
        ExceptionSpecificationAST *ast = new (_pool) ExceptionSpecificationAST;
        ast->throw_token = consumeToken();
        if (LA() == T_LPAREN)
            ast->lparen_token = consumeToken();
        if (LA() == T_DOT_DOT_DOT)
            ast->dot_dot_dot_token = consumeToken();
        else
            parseTypeIdList(ast->type_ids);
        if (LA() == T_RPAREN)
            ast->rparen_token = consumeToken();
        node = ast;
        return true;
    }
    return false;
}

bool Parser::parseEnumerator(EnumeratorAST *&node)
{
Roberto Raggi's avatar
Roberto Raggi committed
1723
    DEBUG_THIS_RULE();
con's avatar
con committed
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
    if (LA() == T_IDENTIFIER) {
        EnumeratorAST *ast = new (_pool) EnumeratorAST;
        ast->identifier_token = consumeToken();

        if (LA() == T_EQUAL) {
            ast->equal_token = consumeToken();
            parseConstantExpression(ast->expression);
        }
        node = ast;
        return true;
    }
    return false;
}

bool Parser::parseInitDeclarator(DeclaratorAST *&node,
        bool acceptStructDeclarator)
{
Roberto Raggi's avatar
Roberto Raggi committed
1741
    DEBUG_THIS_RULE();
con's avatar
con committed
1742
1743
1744
1745
1746
    unsigned start = cursor();

    if (acceptStructDeclarator && LA() == T_COLON) {
        // anonymous bit-field declaration.
        // ### TODO create the AST
1747
    } else if (! parseDeclarator(node, /*stopAtCppInitializer = */ ! acceptStructDeclarator)) {
con's avatar
con committed
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
        return false;
    }

    if (LA() == T_ASM && LA(2) == T_LPAREN) { // ### FIXME
        consumeToken();

        if (skip(T_LPAREN, T_RPAREN))
            consumeToken();
    }

    if (acceptStructDeclarator && node &&
            ! node->postfix_declarators &&
            node->core_declarator &&
            node->core_declarator->asNestedDeclarator()) {
        rewind(start);
        return false;
    }

    if (acceptStructDeclarator && LA() == T_COLON
            && (! node || ! node->postfix_declarators)) {
        unsigned colon_token = consumeToken();
        ExpressionAST *expression = 0;
        if (parseConstantExpression(expression) && (LA() == T_COMMA ||
                                                    LA() == T_SEMICOLON)) {
            // recognized a bitfielddeclarator.
            // ### TODO create the AST
            return true;
        }
        rewind(colon_token);
    } else if (LA() == T_EQUAL || (! acceptStructDeclarator && LA() == T_LPAREN)) {
1778
        parseInitializer(node->initializer, &node->equals_token);
con's avatar
con committed
1779