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/*******************************************************************************
* Copyright (c) 2004, 2011 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* John Camelon (IBM) - Initial API and implementation
* Markus Schorn (Wind River Systems)
*******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.cpp;
import static org.eclipse.cdt.core.dom.ast.IASTExpression.ValueCategory.PRVALUE;
import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTCompoundStatement;
import org.eclipse.cdt.core.dom.ast.IASTExpressionStatement;
import org.eclipse.cdt.core.dom.ast.IASTStatement;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTExpression;
import org.eclipse.cdt.core.dom.ast.gnu.IGNUASTCompoundStatementExpression;
import org.eclipse.cdt.internal.core.dom.parser.ASTNode;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalCompound;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalFixed;
/**
* Gnu-extension: ({ ... })
*/
public class CPPASTCompoundStatementExpression extends ASTNode implements IGNUASTCompoundStatementExpression, ICPPASTExpression {
private IASTCompoundStatement statement;
private ICPPEvaluation fEval;
public CPPASTCompoundStatementExpression() {
}
@Override
public ICPPEvaluation getEvaluation() {
if (fEval == null) {
IASTCompoundStatement compound = getCompoundStatement();
IASTStatement[] statements = compound.getStatements();
if (statements.length > 0) {
IASTStatement st = statements[statements.length - 1];
if (st instanceof IASTExpressionStatement) {
fEval= new EvalCompound(((ICPPASTExpression) ((IASTExpressionStatement) st).getExpression()).getEvaluation(), this);
}
}
if (fEval == null)
fEval= EvalFixed.INCOMPLETE;
}
return fEval;
}
public CPPASTCompoundStatementExpression(IASTCompoundStatement statement) {
setCompoundStatement(statement);
}
@Override
public CPPASTCompoundStatementExpression copy() {
return copy(CopyStyle.withoutLocations);
}
@Override
public CPPASTCompoundStatementExpression copy(CopyStyle style) {
CPPASTCompoundStatementExpression copy = new CPPASTCompoundStatementExpression();
copy.setCompoundStatement(statement == null ? null : statement.copy(style));
copy.setOffsetAndLength(this);
if (style == CopyStyle.withLocations) {
copy.setCopyLocation(this);
}
return copy;
}
@Override
public IASTCompoundStatement getCompoundStatement() {
return statement;
}
@Override
public void setCompoundStatement(IASTCompoundStatement statement) {
assertNotFrozen();
this.statement = statement;
if (statement != null) {
statement.setParent(this);
statement.setPropertyInParent(STATEMENT);
}
}
@Override
public boolean accept( ASTVisitor action ){
if( action.shouldVisitExpressions ){
switch( action.visit( this ) ){
case ASTVisitor.PROCESS_ABORT : return false;
case ASTVisitor.PROCESS_SKIP : return true;
default : break;
}
}
if( statement != null ) if( !statement.accept( action ) ) return false;
if( action.shouldVisitExpressions ){
switch( action.leave( this ) ){
case ASTVisitor.PROCESS_ABORT : return false;
case ASTVisitor.PROCESS_SKIP : return true;
default : break;
}
}
return true;
}
@Override
public IType getExpressionType() {
return getEvaluation().getTypeOrFunctionSet(this);
}
@Override
public boolean isLValue() {
return false;
}
@Override
public ValueCategory getValueCategory() {
return PRVALUE;
}
}
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