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/*******************************************************************************
* Copyright (c) 2005, 2009 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 Rational Software) - Initial API and implementation
* Yuan Zhang / Beth Tibbitts (IBM Research)
* Bryan Wilkinson (QNX)
* Markus Schorn (Wind River Systems)
*******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.c;
import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.DOMException;
import org.eclipse.cdt.core.dom.ast.IASTCompletionContext;
import org.eclipse.cdt.core.dom.ast.IASTExpression;
import org.eclipse.cdt.core.dom.ast.IASTFieldReference;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IBinding;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.dom.ast.IVariable;
import org.eclipse.cdt.internal.core.dom.parser.ASTNode;
import org.eclipse.cdt.internal.core.dom.parser.IASTAmbiguityParent;
/**
* Field reference in C.
*/
public class CASTFieldReference extends ASTNode implements IASTFieldReference, IASTAmbiguityParent, IASTCompletionContext {
private IASTExpression owner;
private IASTName name;
private boolean ptr;
public CASTFieldReference() {
}
public CASTFieldReference(IASTName name, IASTExpression owner) {
this(name, owner, false);
}
public CASTFieldReference(IASTName name, IASTExpression owner, boolean ptr) {
setFieldOwner(owner);
setFieldName(name);
this.ptr = ptr;
}
public CASTFieldReference copy() {
CASTFieldReference copy = new CASTFieldReference();
copy.setFieldOwner(owner == null ? null : owner.copy());
copy.setFieldName(name == null ? null : name.copy());
copy.ptr = ptr;
copy.setOffsetAndLength(this);
return copy;
}
public IASTExpression getFieldOwner() {
return owner;
}
public void setFieldOwner(IASTExpression expression) {
assertNotFrozen();
this.owner = expression;
if (expression != null) {
expression.setParent(this);
expression.setPropertyInParent(FIELD_OWNER);
}
}
public IASTName getFieldName() {
return name;
}
public void setFieldName(IASTName name) {
assertNotFrozen();
this.name = name;
if (name != null) {
name.setParent(this);
name.setPropertyInParent(FIELD_NAME);
}
}
public boolean isPointerDereference() {
return ptr;
}
public void setIsPointerDereference(boolean value) {
assertNotFrozen();
ptr = value;
}
@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( owner != null ) if( !owner.accept( action ) ) return false;
if( name != null ) if( !name.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;
}
public int getRoleForName(IASTName n ) {
if( n == this.name )
return r_reference;
return r_unclear;
}
public void replace(IASTNode child, IASTNode other) {
if( child == owner)
{
other.setPropertyInParent( child.getPropertyInParent() );
other.setParent( child.getParent() );
owner = (IASTExpression) other;
}
}
public IType getExpressionType() {
IBinding binding = getFieldName().resolveBinding();
if (binding instanceof IVariable) {
try {
return ((IVariable)binding).getType();
} catch (DOMException e) {
return e.getProblem();
}
}
return null;
}
public boolean isLValue() {
if (isPointerDereference())
return true;
return getFieldOwner().isLValue();
}
public IBinding[] findBindings(IASTName n, boolean isPrefix) {
return CVisitor.findBindingsForContentAssist(n, isPrefix);
}
}
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