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/*******************************************************************************
* Copyright (c) 2005, 2013 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* John Camelon (IBM Rational Software) - Initial API and implementation
* Yuan Zhang / Beth Tibbitts (IBM Research)
* 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.IASTArraySubscriptExpression;
import org.eclipse.cdt.core.dom.ast.IASTExpression;
import org.eclipse.cdt.core.dom.ast.IASTInitializerClause;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IArrayType;
import org.eclipse.cdt.core.dom.ast.IPointerType;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.internal.core.dom.parser.ASTNode;
import org.eclipse.cdt.internal.core.dom.parser.IASTAmbiguityParent;
/**
* Array subscript expression for C.
*/
public class CASTArraySubscriptExpression extends ASTNode implements
IASTArraySubscriptExpression, IASTAmbiguityParent {
private IASTExpression array;
private IASTExpression subscript;
public CASTArraySubscriptExpression() {
}
public CASTArraySubscriptExpression(IASTExpression array, IASTExpression subscript) {
setArrayExpression(array);
setSubscriptExpression(subscript);
}
@Override
public CASTArraySubscriptExpression copy() {
return copy(CopyStyle.withoutLocations);
}
@Override
public CASTArraySubscriptExpression copy(CopyStyle style) {
CASTArraySubscriptExpression copy = new CASTArraySubscriptExpression();
copy.setArrayExpression(array == null ? null : array.copy(style));
copy.setSubscriptExpression(subscript == null ? null : subscript.copy(style));
return copy(copy, style);
}
@Override
public IASTExpression getArrayExpression() {
return array;
}
@Override
public void setArrayExpression(IASTExpression expression) {
assertNotFrozen();
array = expression;
if (expression != null) {
expression.setParent(this);
expression.setPropertyInParent(ARRAY);
}
}
@Override
public IASTExpression getSubscriptExpression() {
return subscript;
}
@Override
public void setSubscriptExpression(IASTExpression expression) {
assertNotFrozen();
this.subscript = expression;
if (expression != null) {
expression.setParent(this);
expression.setPropertyInParent(SUBSCRIPT);
}
}
@Override
public IASTInitializerClause getArgument() {
return subscript;
}
@Override
public void setArgument(IASTInitializerClause expression) {
if (expression instanceof IASTExpression) {
setSubscriptExpression((IASTExpression) expression);
} else {
setSubscriptExpression(null);
}
}
@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 (array != null && !array.accept(action)) return false;
if (subscript != null && !subscript.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 == array) {
other.setPropertyInParent(child.getPropertyInParent());
other.setParent(child.getParent());
array = (IASTExpression) other;
}
if (child == subscript) {
other.setPropertyInParent(child.getPropertyInParent());
other.setParent(child.getParent());
subscript = (IASTExpression) other;
}
}
@Override
public IType getExpressionType() {
IType t = getArrayExpression().getExpressionType();
t = CVisitor.unwrapTypedefs(t);
if (t instanceof IPointerType)
return ((IPointerType) t).getType();
else if (t instanceof IArrayType)
return ((IArrayType) t).getType();
return t;
}
@Override
public boolean isLValue() {
return true;
}
@Override
public final ValueCategory getValueCategory() {
return ValueCategory.LVALUE;
}
}
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