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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.LVALUE;
import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTExpression;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTTypeId;
import org.eclipse.cdt.core.dom.ast.IProblemType;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTCastExpression;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTExpression;
import org.eclipse.cdt.internal.core.dom.parser.ASTNode;
import org.eclipse.cdt.internal.core.dom.parser.IASTAmbiguityParent;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.CPPVisitor;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalFixed;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.EvalTypeId;
/**
* Cast expression for C++
*/
public class CPPASTCastExpression extends ASTNode implements ICPPASTCastExpression, IASTAmbiguityParent {
private int op;
private ICPPASTExpression operand;
private IASTTypeId typeId;
private ICPPEvaluation fEvaluation;
public CPPASTCastExpression() {
}
public CPPASTCastExpression(int operator, IASTTypeId typeId, IASTExpression operand) {
op = operator;
setOperand(operand);
setTypeId(typeId);
}
@Override
public CPPASTCastExpression copy() {
return copy(CopyStyle.withoutLocations);
}
@Override
public CPPASTCastExpression copy(CopyStyle style) {
CPPASTCastExpression copy = new CPPASTCastExpression();
copy.setOperator(getOperator());
copy.setTypeId(typeId == null ? null : typeId.copy(style));
IASTExpression operand = getOperand();
copy.setOperand(operand == null ? null : operand.copy(style));
copy.setOffsetAndLength(this);
if (style == CopyStyle.withLocations) {
copy.setCopyLocation(this);
}
return copy;
}
@Override
public void setTypeId(IASTTypeId typeId) {
assertNotFrozen();
this.typeId = typeId;
if (typeId != null) {
typeId.setParent(this);
typeId.setPropertyInParent(TYPE_ID);
}
}
@Override
public IASTTypeId getTypeId() {
return typeId;
}
@Override
public int getOperator() {
return op;
}
@Override
public void setOperator(int operator) {
assertNotFrozen();
op = operator;
}
@Override
public IASTExpression getOperand() {
return operand;
}
@Override
public void setOperand(IASTExpression expression) {
assertNotFrozen();
operand = (ICPPASTExpression) expression;
if (expression != null) {
expression.setParent(this);
expression.setPropertyInParent(OPERAND);
}
}
@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 (typeId != null && !typeId.accept(action)) return false;
IASTExpression op = getOperand();
if (op != null && !op.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 void replace(IASTNode child, IASTNode other) {
if (child == operand) {
other.setPropertyInParent(child.getPropertyInParent());
other.setParent(child.getParent());
operand = (ICPPASTExpression) other;
}
}
@Override
public ICPPEvaluation getEvaluation() {
if (fEvaluation == null)
fEvaluation= computeEvaluation();
return fEvaluation;
}
private ICPPEvaluation computeEvaluation() {
if (operand == null)
return EvalFixed.INCOMPLETE;
IType type= CPPVisitor.createType(getTypeId());
if (type == null || type instanceof IProblemType)
return EvalFixed.INCOMPLETE;
return new EvalTypeId(type, this, operand.getEvaluation());
}
@Override
public IType getExpressionType() {
return getEvaluation().getTypeOrFunctionSet(this);
}
@Override
public ValueCategory getValueCategory() {
return getEvaluation().getValueCategory(this);
}
@Override
public boolean isLValue() {
return getValueCategory() == LVALUE;
}
}
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