CheckDeclarator.cpp 9.73 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
26
** contact the sales department at http://www.qtsoftware.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
55
56
57
58
59
60
61
62
63
64
65
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
91
92
93
94
95
96
// 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 "CheckDeclarator.h"
#include "Semantic.h"
#include "AST.h"
#include "Control.h"
#include "TranslationUnit.h"
#include "Literals.h"
#include "CoreTypes.h"
#include "Symbols.h"

CPLUSPLUS_BEGIN_NAMESPACE

CheckDeclarator::CheckDeclarator(Semantic *semantic)
    : SemanticCheck(semantic),
      _declarator(0),
      _scope(0),
      _name(0)
{ }

CheckDeclarator::~CheckDeclarator()
{ }

FullySpecifiedType CheckDeclarator::check(DeclaratorAST *declarator,
                                               FullySpecifiedType type,
                                               Scope *scope,
                                               Name **name)
{
    FullySpecifiedType previousType = switchFullySpecifiedType(type);
    Scope *previousScope = switchScope(scope);
    DeclaratorAST *previousDeclarator = switchDeclarator(declarator);
    Name **previousName = switchName(name);
    accept(declarator);
    (void) switchName(previousName);
    (void) switchDeclarator(previousDeclarator);
    (void) switchScope(previousScope);
    return switchFullySpecifiedType(previousType);
}

FullySpecifiedType CheckDeclarator::check(PtrOperatorAST *ptrOperators,
                                               FullySpecifiedType type,
                                               Scope *scope)
{
    FullySpecifiedType previousType = switchFullySpecifiedType(type);
    Scope *previousScope = switchScope(scope);
    accept(ptrOperators);
    (void) switchScope(previousScope);
    return switchFullySpecifiedType(previousType);
}

97
98
99
100
101
102
103
104
105
FullySpecifiedType CheckDeclarator::check(ObjCMethodPrototypeAST *methodPrototype,
                                          Scope *scope)
{
    Scope *previousScope = switchScope(scope);
    accept(methodPrototype);
    (void) switchScope(previousScope);
    return _fullySpecifiedType;
}

con's avatar
con committed
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
DeclaratorAST *CheckDeclarator::switchDeclarator(DeclaratorAST *declarator)
{
    DeclaratorAST *previousDeclarator = _declarator;
    _declarator = declarator;
    return previousDeclarator;
}

FullySpecifiedType CheckDeclarator::switchFullySpecifiedType(FullySpecifiedType type)
{
    FullySpecifiedType previousType = _fullySpecifiedType;
    _fullySpecifiedType = type;
    return previousType;
}

Scope *CheckDeclarator::switchScope(Scope *scope)
{
    Scope *previousScope = _scope;
    _scope = scope;
    return previousScope;
}

Name **CheckDeclarator::switchName(Name **name)
{
    Name **previousName = _name;
    _name = name;
    return previousName;
}

bool CheckDeclarator::visit(DeclaratorAST *ast)
{
    accept(ast->ptr_operators);
    accept(ast->postfix_declarators);
    accept(ast->core_declarator);

140
141
    if (ast->initializer) {
        FullySpecifiedType exprTy = semantic()->check(ast->initializer, _scope);
con's avatar
con committed
142

143
        if (Function *funTy = _fullySpecifiedType->asFunctionType())
144
            funTy->setPureVirtual(true);
con's avatar
con committed
145
    }
146

con's avatar
con committed
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
    return false;
}

bool CheckDeclarator::visit(DeclaratorIdAST *ast)
{
    Name *name = semantic()->check(ast->name, _scope);
    if (_name)
        *_name = name;
    return false;
}

bool CheckDeclarator::visit(NestedDeclaratorAST *ast)
{
    accept(ast->declarator);
    return false;
}

bool CheckDeclarator::visit(FunctionDeclaratorAST *ast)
{
    Function *fun = control()->newFunction(ast->firstToken());
167
    fun->setAmbiguous(ast->as_cpp_initializer != 0);
Roberto Raggi's avatar
Roberto Raggi committed
168
    ast->symbol = fun;
con's avatar
con committed
169
170
171
    fun->setReturnType(_fullySpecifiedType);

    if (ast->parameters) {
Roberto Raggi's avatar
Roberto Raggi committed
172
173
174
        DeclarationListAST *parameter_declarations = ast->parameters->parameter_declarations;
        for (DeclarationListAST *decl = parameter_declarations; decl; decl = decl->next) {
            semantic()->check(decl->declaration, fun->arguments());
con's avatar
con committed
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
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
        }

        if (ast->parameters->dot_dot_dot_token)
            fun->setVariadic(true);
    }

    // check the arguments
    bool hasDefaultArguments = false;
    for (unsigned i = 0; i < fun->argumentCount(); ++i) {
        Argument *arg = fun->argumentAt(i)->asArgument();
        if (hasDefaultArguments && ! arg->hasInitializer()) {
            translationUnit()->error(ast->firstToken(),
                "default argument missing for parameter at position %d", i + 1);
        } else if (! hasDefaultArguments) {
            hasDefaultArguments = arg->hasInitializer();
        }
    }

    FullySpecifiedType funTy(fun);
    _fullySpecifiedType = funTy;

    for (SpecifierAST *it = ast->cv_qualifier_seq; it; it = it->next) {
        SimpleSpecifierAST *cv = static_cast<SimpleSpecifierAST *>(it);
        int k = tokenKind(cv->specifier_token);
        if (k == T_CONST)
            fun->setConst(true);
        else if (k == T_VOLATILE)
            fun->setVolatile(true);
    }

    accept(ast->next);
    return false;
}

bool CheckDeclarator::visit(ArrayDeclaratorAST *ast)
{
    ArrayType *ty = control()->arrayType(_fullySpecifiedType); // ### set the dimension
    FullySpecifiedType exprTy = semantic()->check(ast->expression, _scope);
    FullySpecifiedType arrTy(ty);
    _fullySpecifiedType = ty;
    accept(ast->next);
    return false;
}

bool CheckDeclarator::visit(PointerToMemberAST *ast)
{
    Name *memberName = semantic()->check(ast->nested_name_specifier, _scope);
    PointerToMemberType *ptrTy = control()->pointerToMemberType(memberName, _fullySpecifiedType);
    FullySpecifiedType ty(ptrTy);
    _fullySpecifiedType = ty;
    applyCvQualifiers(ast->cv_qualifier_seq);
    accept(ast->next);
    return false;
}

bool CheckDeclarator::visit(PointerAST *ast)
{
    PointerType *ptrTy = control()->pointerType(_fullySpecifiedType);
    FullySpecifiedType ty(ptrTy);
    _fullySpecifiedType = ty;
    applyCvQualifiers(ast->cv_qualifier_seq);
    accept(ast->next);
    return false;
}

bool CheckDeclarator::visit(ReferenceAST *ast)
{
    ReferenceType *refTy = control()->referenceType(_fullySpecifiedType);
    FullySpecifiedType ty(refTy);
    _fullySpecifiedType = ty;
    accept(ast->next);
    return false;
}

249
250
bool CheckDeclarator::visit(ObjCMethodPrototypeAST *ast)
{
251
252
    FullySpecifiedType returnType = semantic()->check(ast->type_name, _scope);

253
254
255
256
257
258
259
260
261
262
263
    unsigned location = ast->firstToken();

    Name *name = semantic()->check(ast->selector, _scope);

    Function *fun = control()->newFunction(location, name);
    ast->symbol = fun;
    fun->setSourceLocation(location);
    fun->setScope(_scope);
    fun->setMethodKey(Function::NormalMethod);
    fun->setVisibility(semantic()->currentVisibility());
    fun->setPureVirtual(false);
264
265
    fun->setReturnType(returnType);

Roberto Raggi's avatar
Roberto Raggi committed
266
    if (ast->selector && ast->selector->asObjCSelectorWithArguments()) {
267
268
269
270
271
        // TODO: check the parameters (EV)
        //    fun->setVariadic(...);
        // TODO: add arguments (EV)
        for (ObjCMessageArgumentDeclarationListAST *it = ast->arguments; it; it = it->next) {
            ObjCMessageArgumentDeclarationAST *argDecl = it->argument_declaration;
272

273
274
275
            semantic()->check(argDecl, fun->arguments());
        }
    }
276

277
    _fullySpecifiedType = FullySpecifiedType(fun);
278
279
280
281
282
283

    // TODO: check which specifiers are allowed here (EV)

    return false;
}

con's avatar
con committed
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
void CheckDeclarator::applyCvQualifiers(SpecifierAST *cv)
{
    for (; cv; cv = cv->next) {
        SimpleSpecifierAST *spec = static_cast<SimpleSpecifierAST *>(cv);
        switch (translationUnit()->tokenKind(spec->specifier_token)) {
        case T_VOLATILE:
            _fullySpecifiedType.setVolatile(true);
            break;
        case T_CONST:
            _fullySpecifiedType.setConst(true);
            break;
        default:
            break;
        } // switch
    }
}

CPLUSPLUS_END_NAMESPACE