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239
shared/cplusplus/CheckStatement.cpp
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239
shared/cplusplus/CheckStatement.cpp
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/***************************************************************************
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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) 2008 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Qt Software Information (qt-info@nokia.com)
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**
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**
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** Non-Open Source Usage
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**
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** Licensees may use this file in accordance with the Qt Beta Version
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** License Agreement, Agreement version 2.2 provided with the Software or,
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** alternatively, in accordance with the terms contained in a written
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** agreement between you and Nokia.
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**
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** GNU General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the packaging
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** of this file. Please review the following information to ensure GNU
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** General Public Licensing requirements will be met:
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**
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** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt GPL Exception version
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** 1.2, included in the file GPL_EXCEPTION.txt in this package.
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**
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***************************************************************************/
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// Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#include "CheckStatement.h"
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#include "Semantic.h"
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#include "AST.h"
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#include "TranslationUnit.h"
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#include "Scope.h"
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#include "CoreTypes.h"
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#include "Control.h"
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#include "Symbols.h"
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CPLUSPLUS_BEGIN_NAMESPACE
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CheckStatement::CheckStatement(Semantic *semantic)
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: SemanticCheck(semantic),
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_statement(0),
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_scope(0)
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{ }
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CheckStatement::~CheckStatement()
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{ }
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void CheckStatement::check(StatementAST *statement, Scope *scope)
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{
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Scope *previousScope = switchScope(scope);
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StatementAST *previousStatement = switchStatement(statement);
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accept(statement);
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(void) switchStatement(previousStatement);
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(void) switchScope(previousScope);
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}
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StatementAST *CheckStatement::switchStatement(StatementAST *statement)
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{
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StatementAST *previousStatement = _statement;
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_statement = statement;
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return previousStatement;
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}
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Scope *CheckStatement::switchScope(Scope *scope)
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{
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Scope *previousScope = _scope;
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_scope = scope;
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return previousScope;
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}
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bool CheckStatement::visit(CaseStatementAST *ast)
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{
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FullySpecifiedType exprTy = semantic()->check(ast->expression, _scope);
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semantic()->check(ast->statement, _scope);
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return false;
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}
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bool CheckStatement::visit(CompoundStatementAST *ast)
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{
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Block *block = control()->newBlock(ast->lbrace_token);
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_scope->enterSymbol(block);
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Scope *previousScope = switchScope(block->members());
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for (StatementAST *it = ast->statements; it; it = it->next) {
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semantic()->check(it, _scope);
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}
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(void) switchScope(previousScope);
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return false;
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}
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bool CheckStatement::visit(DeclarationStatementAST *ast)
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{
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semantic()->check(ast->declaration, _scope);
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return false;
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}
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bool CheckStatement::visit(DoStatementAST *ast)
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{
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semantic()->check(ast->statement, _scope);
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FullySpecifiedType exprTy = semantic()->check(ast->expression, _scope);
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return false;
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}
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bool CheckStatement::visit(ExpressionOrDeclarationStatementAST *ast)
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{
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// translationUnit()->warning(ast->firstToken(),
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// "ambiguous expression or declaration statement");
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if (ast->declaration)
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semantic()->check(ast->declaration, _scope);
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else
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semantic()->check(ast->expression, _scope);
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return false;
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}
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bool CheckStatement::visit(ExpressionStatementAST *ast)
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{
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FullySpecifiedType exprTy = semantic()->check(ast->expression, _scope);
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return false;
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}
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bool CheckStatement::visit(ForStatementAST *ast)
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{
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Block *block = control()->newBlock(ast->for_token);
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_scope->enterSymbol(block);
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Scope *previousScope = switchScope(block->members());
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semantic()->check(ast->initializer, _scope);
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FullySpecifiedType condTy = semantic()->check(ast->condition, _scope);
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FullySpecifiedType exprTy = semantic()->check(ast->expression, _scope);
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semantic()->check(ast->statement, _scope);
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(void) switchScope(previousScope);
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return false;
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}
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bool CheckStatement::visit(IfStatementAST *ast)
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{
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Block *block = control()->newBlock(ast->if_token);
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_scope->enterSymbol(block);
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Scope *previousScope = switchScope(block->members());
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FullySpecifiedType exprTy = semantic()->check(ast->condition, _scope);
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semantic()->check(ast->statement, _scope);
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semantic()->check(ast->else_statement, _scope);
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(void) switchScope(previousScope);
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return false;
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}
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bool CheckStatement::visit(LabeledStatementAST *ast)
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{
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semantic()->check(ast->statement, _scope);
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return false;
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}
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bool CheckStatement::visit(BreakStatementAST *)
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{
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return false;
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}
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bool CheckStatement::visit(ContinueStatementAST *)
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{
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return false;
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}
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bool CheckStatement::visit(GotoStatementAST *)
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{
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return false;
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}
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bool CheckStatement::visit(ReturnStatementAST *ast)
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{
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FullySpecifiedType exprTy = semantic()->check(ast->expression, _scope);
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return false;
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}
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bool CheckStatement::visit(SwitchStatementAST *ast)
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{
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Block *block = control()->newBlock(ast->switch_token);
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_scope->enterSymbol(block);
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Scope *previousScope = switchScope(block->members());
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FullySpecifiedType condTy = semantic()->check(ast->condition, _scope);
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semantic()->check(ast->statement, _scope);
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(void) switchScope(previousScope);
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return false;
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}
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bool CheckStatement::visit(TryBlockStatementAST *ast)
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{
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semantic()->check(ast->statement, _scope);
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for (CatchClauseAST *c = ast->catch_clause_seq; c; c = c->next) {
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semantic()->check(c, _scope);
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}
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return false;
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}
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bool CheckStatement::visit(CatchClauseAST *ast)
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{
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Block *block = control()->newBlock(ast->catch_token);
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_scope->enterSymbol(block);
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Scope *previousScope = switchScope(block->members());
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semantic()->check(ast->exception_declaration, _scope);
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semantic()->check(ast->statement, _scope);
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(void) switchScope(previousScope);
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return false;
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}
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bool CheckStatement::visit(WhileStatementAST *ast)
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{
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Block *block = control()->newBlock(ast->while_token);
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_scope->enterSymbol(block);
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Scope *previousScope = switchScope(block->members());
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FullySpecifiedType condTy = semantic()->check(ast->condition, _scope);
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semantic()->check(ast->statement, _scope);
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(void) switchScope(previousScope);
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return false;
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}
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CPLUSPLUS_END_NAMESPACE
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