forked from qt-creator/qt-creator
678 lines
20 KiB
C++
678 lines
20 KiB
C++
/**************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** Commercial Usage
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**
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at http://qt.nokia.com/contact.
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**
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**************************************************************************/
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#include "ResolveExpression.h"
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#include "LookupContext.h"
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#include "Overview.h"
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#include "GenTemplateInstance.h"
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#include <Control.h>
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#include <AST.h>
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#include <Scope.h>
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#include <Names.h>
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#include <Symbols.h>
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#include <Literals.h>
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#include <CoreTypes.h>
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#include <TypeVisitor.h>
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#include <NameVisitor.h>
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#include <QtCore/QList>
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#include <QtCore/QtDebug>
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using namespace CPlusPlus;
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namespace {
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const bool debug = ! qgetenv("CPLUSPLUS_DEBUG").isEmpty();
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template <typename _Tp>
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static QList<_Tp> removeDuplicates(const QList<_Tp> &results)
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{
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QList<_Tp> uniqueList;
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QSet<_Tp> processed;
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foreach (const _Tp &r, results) {
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if (processed.contains(r))
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continue;
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processed.insert(r);
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uniqueList.append(r);
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}
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return uniqueList;
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}
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} // end of anonymous namespace
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/////////////////////////////////////////////////////////////////////
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// ResolveExpression
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/////////////////////////////////////////////////////////////////////
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ResolveExpression::ResolveExpression(const LookupContext &context)
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: ASTVisitor(context.expressionDocument()->translationUnit()),
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_scope(0),
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_context(context),
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sem(context.expressionDocument()->translationUnit())
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{ }
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ResolveExpression::~ResolveExpression()
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{ }
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QList<LookupItem> ResolveExpression::operator()(ExpressionAST *ast, Scope *scope)
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{ return resolve(ast, scope); }
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QList<LookupItem> ResolveExpression::resolve(ExpressionAST *ast, Scope *scope)
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{
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Q_ASSERT(scope != 0);
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Scope *previousVisibleSymbol = _scope;
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_scope = scope;
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const QList<LookupItem> result = resolve(ast);
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_scope = previousVisibleSymbol;
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return result;
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}
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QList<LookupItem> ResolveExpression::resolve(ExpressionAST *ast)
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{
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const QList<LookupItem> previousResults = switchResults(QList<LookupItem>());
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accept(ast);
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return removeDuplicates(switchResults(previousResults));
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}
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QList<LookupItem> ResolveExpression::switchResults(const QList<LookupItem> &results)
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{
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const QList<LookupItem> previousResults = _results;
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_results = results;
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return previousResults;
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}
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void ResolveExpression::addResults(const QList<Symbol *> &symbols)
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{
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foreach (Symbol *symbol, symbols) {
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LookupItem item;
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item.setType(symbol->type());
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item.setScope(symbol->scope());
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item.setDeclaration(symbol);
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_results.append(item);
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}
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}
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void ResolveExpression::addResult(const FullySpecifiedType &ty, Scope *scope)
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{
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Q_ASSERT(scope != 0);
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#warning fix the signature of addResult.
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LookupItem item;
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item.setType(ty);
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item.setScope(scope);
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_results.append(item);
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}
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bool ResolveExpression::visit(BinaryExpressionAST *ast)
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{
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if (tokenKind(ast->binary_op_token) == T_COMMA && ast->right_expression && ast->right_expression->asQtMethod() != 0) {
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if (ast->left_expression && ast->left_expression->asQtMethod() != 0)
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thisObject();
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else
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accept(ast->left_expression);
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QtMethodAST *qtMethod = ast->right_expression->asQtMethod();
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if (DeclaratorAST *d = qtMethod->declarator) {
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if (d->core_declarator) {
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if (DeclaratorIdAST *declaratorId = d->core_declarator->asDeclaratorId()) {
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if (NameAST *nameAST = declaratorId->name) {
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if (ClassOrNamespace *binding = baseExpression(_results, T_ARROW)) {
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_results.clear();
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addResults(binding->lookup(nameAST->name));
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}
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}
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}
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}
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}
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return false;
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}
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accept(ast->left_expression);
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return false;
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}
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bool ResolveExpression::visit(CastExpressionAST *ast)
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{
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Scope *dummyScope = _context.expressionDocument()->globalSymbols();
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FullySpecifiedType ty = sem.check(ast->type_id, dummyScope);
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addResult(ty, _scope);
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return false;
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}
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bool ResolveExpression::visit(ConditionAST *)
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{
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// nothing to do.
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return false;
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}
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bool ResolveExpression::visit(ConditionalExpressionAST *ast)
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{
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if (ast->left_expression)
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accept(ast->left_expression);
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else if (ast->right_expression)
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accept(ast->right_expression);
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return false;
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}
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bool ResolveExpression::visit(CppCastExpressionAST *ast)
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{
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Scope *dummyScope = _context.expressionDocument()->globalSymbols();
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FullySpecifiedType ty = sem.check(ast->type_id, dummyScope);
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addResult(ty, _scope);
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return false;
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}
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bool ResolveExpression::visit(DeleteExpressionAST *)
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{
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FullySpecifiedType ty(control()->voidType());
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addResult(ty, _scope);
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return false;
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}
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bool ResolveExpression::visit(ArrayInitializerAST *)
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{
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// nothing to do.
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return false;
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}
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bool ResolveExpression::visit(NewExpressionAST *ast)
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{
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if (ast->new_type_id) {
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Scope *dummyScope = _context.expressionDocument()->globalSymbols();
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FullySpecifiedType ty = sem.check(ast->new_type_id->type_specifier_list, dummyScope);
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ty = sem.check(ast->new_type_id->ptr_operator_list, ty, dummyScope);
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FullySpecifiedType ptrTy(control()->pointerType(ty));
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addResult(ptrTy, _scope);
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}
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// nothing to do.
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return false;
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}
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bool ResolveExpression::visit(TypeidExpressionAST *)
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{
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const Name *std_type_info[2];
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std_type_info[0] = control()->nameId(control()->findOrInsertIdentifier("std"));
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std_type_info[1] = control()->nameId(control()->findOrInsertIdentifier("type_info"));
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const Name *q = control()->qualifiedNameId(std_type_info, 2, /*global=*/ true);
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FullySpecifiedType ty(control()->namedType(q));
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addResult(ty, _scope);
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return false;
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}
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bool ResolveExpression::visit(TypenameCallExpressionAST *)
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{
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// nothing to do
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return false;
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}
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bool ResolveExpression::visit(TypeConstructorCallAST *)
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{
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// nothing to do.
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return false;
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}
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bool ResolveExpression::visit(PostfixExpressionAST *ast)
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{
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accept(ast->base_expression);
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for (PostfixListAST *it = ast->postfix_expression_list; it; it = it->next)
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accept(it->value);
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return false;
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}
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bool ResolveExpression::visit(SizeofExpressionAST *)
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{
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FullySpecifiedType ty(control()->integerType(IntegerType::Int));
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ty.setUnsigned(true);
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addResult(ty, _scope);
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return false;
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}
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bool ResolveExpression::visit(NumericLiteralAST *ast)
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{
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Type *type = 0;
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const NumericLiteral *literal = numericLiteral(ast->literal_token);
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if (literal->isChar())
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type = control()->integerType(IntegerType::Char);
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else if (literal->isWideChar())
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type = control()->integerType(IntegerType::WideChar);
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else if (literal->isInt())
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type = control()->integerType(IntegerType::Int);
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else if (literal->isLong())
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type = control()->integerType(IntegerType::Long);
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else if (literal->isLongLong())
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type = control()->integerType(IntegerType::LongLong);
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else if (literal->isFloat())
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type = control()->floatType(FloatType::Float);
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else if (literal->isDouble())
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type = control()->floatType(FloatType::Double);
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else if (literal->isLongDouble())
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type = control()->floatType(FloatType::LongDouble);
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else
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type = control()->integerType(IntegerType::Int);
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FullySpecifiedType ty(type);
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if (literal->isUnsigned())
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ty.setUnsigned(true);
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addResult(ty, _scope);
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return false;
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}
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bool ResolveExpression::visit(BoolLiteralAST *)
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{
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FullySpecifiedType ty(control()->integerType(IntegerType::Bool));
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addResult(ty, _scope);
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return false;
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}
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bool ResolveExpression::visit(ThisExpressionAST *)
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{
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thisObject();
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return false;
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}
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void ResolveExpression::thisObject()
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{
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Scope *scope = _scope;
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for (; scope; scope = scope->enclosingScope()) {
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if (scope->isFunctionScope()) {
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Function *fun = scope->owner()->asFunction();
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if (Scope *cscope = scope->enclosingClassScope()) {
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Class *klass = cscope->owner()->asClass();
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FullySpecifiedType classTy(control()->namedType(klass->name()));
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FullySpecifiedType ptrTy(control()->pointerType(classTy));
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addResult(ptrTy, fun->scope());
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break;
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} else if (const QualifiedNameId *q = fun->name()->asQualifiedNameId()) {
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const Name *nestedNameSpecifier = 0;
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if (q->nameCount() == 1 && q->isGlobal())
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nestedNameSpecifier = q->nameAt(0);
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else
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nestedNameSpecifier = control()->qualifiedNameId(q->names(), q->nameCount() - 1);
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FullySpecifiedType classTy(control()->namedType(nestedNameSpecifier));
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FullySpecifiedType ptrTy(control()->pointerType(classTy));
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addResult(ptrTy, fun->scope());
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break;
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}
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}
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}
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}
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bool ResolveExpression::visit(CompoundExpressionAST *ast)
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{
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CompoundStatementAST *cStmt = ast->statement;
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if (cStmt && cStmt->statement_list) {
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accept(cStmt->statement_list->lastValue());
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}
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return false;
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}
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bool ResolveExpression::visit(NestedExpressionAST *ast)
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{
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accept(ast->expression);
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return false;
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}
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bool ResolveExpression::visit(StringLiteralAST *)
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{
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FullySpecifiedType charTy = control()->integerType(IntegerType::Char);
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charTy.setConst(true);
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FullySpecifiedType ty(control()->pointerType(charTy));
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addResult(ty, _scope);
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return false;
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}
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bool ResolveExpression::visit(ThrowExpressionAST *)
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{
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return false;
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}
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bool ResolveExpression::visit(TypeIdAST *)
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{
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return false;
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}
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bool ResolveExpression::visit(UnaryExpressionAST *ast)
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{
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accept(ast->expression);
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unsigned unaryOp = tokenKind(ast->unary_op_token);
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if (unaryOp == T_AMPER) {
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QMutableListIterator<LookupItem > it(_results);
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while (it.hasNext()) {
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LookupItem p = it.next();
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FullySpecifiedType ty = p.type();
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ty.setType(control()->pointerType(ty));
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p.setType(ty);
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it.setValue(p);
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}
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} else if (unaryOp == T_STAR) {
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QMutableListIterator<LookupItem > it(_results);
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while (it.hasNext()) {
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LookupItem p = it.next();
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if (PointerType *ptrTy = p.type()->asPointerType()) {
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p.setType(ptrTy->elementType());
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it.setValue(p);
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} else {
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it.remove();
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}
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}
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}
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return false;
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}
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bool ResolveExpression::visit(CompoundLiteralAST *ast)
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{
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accept(ast->type_id);
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return false;
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}
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bool ResolveExpression::visit(QualifiedNameAST *ast)
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{
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if (const Name *name = ast->name) {
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const QList<Symbol *> candidates = _context.lookup(name, _scope);
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addResults(candidates);
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}
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return false;
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}
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bool ResolveExpression::visit(SimpleNameAST *ast)
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{
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const QList<Symbol *> candidates = _context.lookup(ast->name, _scope);
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addResults(candidates);
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return false;
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}
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bool ResolveExpression::visit(TemplateIdAST *ast)
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{
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const QList<Symbol *> candidates = _context.lookup(ast->name, _scope);
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addResults(candidates);
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return false;
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}
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bool ResolveExpression::visit(DestructorNameAST *)
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{
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FullySpecifiedType ty(control()->voidType());
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addResult(ty, _scope);
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return false;
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}
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bool ResolveExpression::visit(OperatorFunctionIdAST *)
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{
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return false;
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}
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bool ResolveExpression::visit(ConversionFunctionIdAST *)
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{
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return false;
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}
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bool ResolveExpression::maybeValidPrototype(Function *funTy, unsigned actualArgumentCount) const
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{
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unsigned minNumberArguments = 0;
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for (; minNumberArguments < funTy->argumentCount(); ++minNumberArguments) {
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Argument *arg = funTy->argumentAt(minNumberArguments)->asArgument();
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if (arg->hasInitializer())
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break;
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}
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if (actualArgumentCount < minNumberArguments) {
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// not enough arguments.
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return false;
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} else if (! funTy->isVariadic() && actualArgumentCount > funTy->argumentCount()) {
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// too many arguments.
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return false;
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}
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return true;
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}
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bool ResolveExpression::visit(CallAST *ast)
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{
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const QList<LookupItem> baseResults = _results;
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_results.clear();
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// Compute the types of the actual arguments.
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int actualArgumentCount = 0;
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//QList< QList<Result> > arguments;
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for (ExpressionListAST *exprIt = ast->expression_list; exprIt; exprIt = exprIt->next) {
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//arguments.append(resolve(exprIt->expression));
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++actualArgumentCount;
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}
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const Name *functionCallOp = control()->operatorNameId(OperatorNameId::FunctionCallOp);
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foreach (const LookupItem &result, baseResults) {
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FullySpecifiedType ty = result.type().simplified();
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Scope *scope = result.scope();
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if (NamedType *namedTy = ty->asNamedType()) {
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if (ClassOrNamespace *b = _context.classOrNamespace(namedTy->name(), scope)) {
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foreach (Symbol *overload, b->find(functionCallOp)) {
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if (Function *funTy = overload->type()->asFunctionType()) {
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if (maybeValidPrototype(funTy, actualArgumentCount)) {
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Function *proto = instantiate(namedTy->name(), funTy)->asFunctionType();
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addResult(proto->returnType().simplified(), scope);
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}
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}
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}
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}
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} else if (Function *funTy = ty->asFunctionType()) {
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if (maybeValidPrototype(funTy, actualArgumentCount))
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addResult(funTy->returnType().simplified(), scope);
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} else if (Class *classTy = ty->asClassType()) {
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// Constructor call
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FullySpecifiedType ctorTy = control()->namedType(classTy->name());
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addResult(ctorTy, scope);
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}
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}
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return false;
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}
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bool ResolveExpression::visit(ArrayAccessAST *ast)
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{
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const QList<LookupItem> baseResults = _results;
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_results.clear();
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const QList<LookupItem> indexResults = resolve(ast->expression);
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const Name *arrayAccessOp = control()->operatorNameId(OperatorNameId::ArrayAccessOp);
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foreach (const LookupItem &result, baseResults) {
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FullySpecifiedType ty = result.type().simplified();
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Scope *scope = result.scope();
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if (PointerType *ptrTy = ty->asPointerType()) {
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addResult(ptrTy->elementType().simplified(), scope);
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} else if (ArrayType *arrTy = ty->asArrayType()) {
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addResult(arrTy->elementType().simplified(), scope);
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} else if (NamedType *namedTy = ty->asNamedType()) {
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if (ClassOrNamespace *b = _context.classOrNamespace(namedTy->name(), scope)) {
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foreach (Symbol *overload, b->find(arrayAccessOp)) {
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if (Function *funTy = overload->type()->asFunctionType()) {
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Function *proto = instantiate(namedTy->name(), funTy)->asFunctionType();
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// ### TODO: check the actual arguments
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addResult(proto->returnType().simplified(), scope);
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}
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}
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}
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}
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}
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return false;
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}
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bool ResolveExpression::visit(MemberAccessAST *ast)
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{
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// The candidate types for the base expression are stored in
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// _results.
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const QList<LookupItem> baseResults = _results;
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// Evaluate the expression-id that follows the access operator.
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const Name *memberName = 0;
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if (ast->member_name)
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memberName = ast->member_name->name;
|
|
|
|
// Remember the access operator.
|
|
const int accessOp = tokenKind(ast->access_token);
|
|
|
|
if (ClassOrNamespace *binding = baseExpression(baseResults, accessOp))
|
|
addResults(binding->lookup(memberName));
|
|
|
|
return false;
|
|
}
|
|
|
|
ClassOrNamespace *ResolveExpression::findClass(const FullySpecifiedType &originalTy, Scope *scope) const
|
|
{
|
|
ClassOrNamespace *binding = 0;
|
|
|
|
FullySpecifiedType ty = originalTy.simplified();
|
|
|
|
if (Class *klass = ty->asClassType())
|
|
binding = _context.classOrNamespace(klass);
|
|
|
|
else if (NamedType *namedTy = ty->asNamedType())
|
|
binding = _context.classOrNamespace(namedTy->name(), scope);
|
|
|
|
return binding;
|
|
}
|
|
|
|
ClassOrNamespace *ResolveExpression::baseExpression(const QList<LookupItem> &baseResults,
|
|
int accessOp,
|
|
bool *replacedDotOperator) const
|
|
{
|
|
foreach (const LookupItem &r, baseResults) {
|
|
FullySpecifiedType ty = r.type().simplified();
|
|
Scope *scope = r.scope();
|
|
|
|
if (accessOp == T_ARROW) {
|
|
if (PointerType *ptrTy = ty->asPointerType()) {
|
|
if (ClassOrNamespace *binding = findClass(ptrTy->elementType(), scope))
|
|
return binding;
|
|
|
|
} else if (ClassOrNamespace *binding = findClass(ty, scope)) {
|
|
// lookup for overloads of operator->
|
|
const OperatorNameId *arrowOp = control()->operatorNameId(OperatorNameId::ArrowOp);
|
|
|
|
foreach (Symbol *overload, binding->find(arrowOp)) {
|
|
FullySpecifiedType overloadTy = overload->type();
|
|
|
|
if (ClassOrNamespace *retBinding = findClass(overloadTy, overload->scope()))
|
|
return retBinding;
|
|
}
|
|
}
|
|
} else if (accessOp == T_DOT) {
|
|
if (replacedDotOperator) {
|
|
if (PointerType *ptrTy = ty->asPointerType()) {
|
|
// replace . with ->
|
|
ty = ptrTy->elementType();
|
|
*replacedDotOperator = true;
|
|
}
|
|
}
|
|
|
|
if (ClassOrNamespace *binding = findClass(ty, scope))
|
|
return binding;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
FullySpecifiedType ResolveExpression::instantiate(const Name *className, Symbol *candidate) const
|
|
{
|
|
return GenTemplateInstance::instantiate(className, candidate, _context.control());
|
|
}
|
|
|
|
bool ResolveExpression::visit(PostIncrDecrAST *)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
bool ResolveExpression::visit(ObjCMessageExpressionAST *ast)
|
|
{
|
|
#warning implement ResolveExpression::visit
|
|
qWarning() << Q_FUNC_INFO << __LINE__;
|
|
return false;
|
|
|
|
#if 0
|
|
const QList<LookupItem> receiverResults = resolve(ast->receiver_expression);
|
|
|
|
if (!receiverResults.isEmpty()) {
|
|
LookupItem result = receiverResults.first();
|
|
FullySpecifiedType ty = result.type().simplified();
|
|
const Name *klassName = 0;
|
|
|
|
if (const ObjCClass *classTy = ty->asObjCClassType()) {
|
|
// static access, e.g.:
|
|
// [NSObject description];
|
|
klassName = classTy->name();
|
|
} else if (const PointerType *ptrTy = ty->asPointerType()) {
|
|
const FullySpecifiedType pointeeTy = ptrTy->elementType();
|
|
if (pointeeTy && pointeeTy->isNamedType()) {
|
|
// dynamic access, e.g.:
|
|
// NSObject *obj = ...; [obj release];
|
|
klassName = pointeeTy->asNamedType()->name();
|
|
}
|
|
}
|
|
|
|
if (klassName&&ast->selector && ast->selector->name) {
|
|
const QList<Symbol *> resolvedSymbols = _context.lookup(klassName, result.scope());
|
|
foreach (Symbol *resolvedSymbol, resolvedSymbols)
|
|
if (ObjCClass *klass = resolvedSymbol->asObjCClass())
|
|
_results.append(resolveMember(ast->selector->name, klass));
|
|
}
|
|
}
|
|
|
|
return false;
|
|
#endif
|
|
}
|
|
|