| /******************************************************************************* |
| * Copyright (c) 2005, 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 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.IASTConditionalExpression; |
| import org.eclipse.cdt.core.dom.ast.IASTExpression; |
| import org.eclipse.cdt.core.dom.ast.IASTNode; |
| 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; |
| |
| /** |
| * Conditional expression in C |
| */ |
| public class CASTConditionalExpression extends ASTNode implements |
| IASTConditionalExpression, IASTAmbiguityParent { |
| |
| private IASTExpression condition; |
| private IASTExpression negative; |
| private IASTExpression positive; |
| |
| public CASTConditionalExpression() { |
| } |
| |
| public CASTConditionalExpression(IASTExpression condition, |
| IASTExpression positive, IASTExpression negative) { |
| setLogicalConditionExpression(condition); |
| setPositiveResultExpression(positive); |
| setNegativeResultExpression(negative); |
| } |
| |
| @Override |
| public CASTConditionalExpression copy() { |
| return copy(CopyStyle.withoutLocations); |
| } |
| |
| @Override |
| public CASTConditionalExpression copy(CopyStyle style) { |
| CASTConditionalExpression copy = new CASTConditionalExpression(); |
| copy.setLogicalConditionExpression(condition == null ? null : condition.copy(style)); |
| copy.setPositiveResultExpression(positive == null ? null : positive.copy(style)); |
| copy.setNegativeResultExpression(negative == null ? null : negative.copy(style)); |
| copy.setOffsetAndLength(this); |
| if (style == CopyStyle.withLocations) { |
| copy.setCopyLocation(this); |
| } |
| return copy; |
| } |
| |
| @Override |
| public IASTExpression getLogicalConditionExpression() { |
| return condition; |
| } |
| |
| @Override |
| public void setLogicalConditionExpression(IASTExpression expression) { |
| assertNotFrozen(); |
| condition = expression; |
| if (expression != null) { |
| expression.setParent(this); |
| expression.setPropertyInParent(LOGICAL_CONDITION); |
| } |
| } |
| |
| @Override |
| public IASTExpression getPositiveResultExpression() { |
| return positive; |
| } |
| |
| @Override |
| public void setPositiveResultExpression(IASTExpression expression) { |
| assertNotFrozen(); |
| this.positive = expression; |
| if (expression != null) { |
| expression.setParent(this); |
| expression.setPropertyInParent(POSITIVE_RESULT); |
| } |
| } |
| |
| @Override |
| public IASTExpression getNegativeResultExpression() { |
| return negative; |
| } |
| |
| @Override |
| public void setNegativeResultExpression(IASTExpression expression) { |
| assertNotFrozen(); |
| this.negative = expression; |
| if (expression != null) { |
| expression.setParent(this); |
| expression.setPropertyInParent(NEGATIVE_RESULT); |
| } |
| } |
| |
| @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( condition != null ) if( !condition.accept( action ) ) return false; |
| if( positive != null ) if( !positive.accept( action ) ) return false; |
| if( negative != null ) if( !negative.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 == condition ) |
| { |
| other.setPropertyInParent( child.getPropertyInParent() ); |
| other.setParent( child.getParent() ); |
| condition = (IASTExpression) other; |
| } |
| if( child == positive) |
| { |
| other.setPropertyInParent( child.getPropertyInParent() ); |
| other.setParent( child.getParent() ); |
| positive= (IASTExpression) other; |
| } |
| if( child == negative) |
| { |
| other.setPropertyInParent( child.getPropertyInParent() ); |
| other.setParent( child.getParent() ); |
| negative= (IASTExpression) other; |
| } |
| } |
| |
| @Override |
| public IType getExpressionType() { |
| IASTExpression positiveExpression = getPositiveResultExpression(); |
| if (positiveExpression == null) { |
| positiveExpression= getLogicalConditionExpression(); |
| } |
| IType t2 = positiveExpression.getExpressionType(); |
| IType t3 = getNegativeResultExpression().getExpressionType(); |
| if (t3 instanceof IPointerType || t2 == null) |
| return t3; |
| return t2; |
| } |
| |
| @Override |
| public boolean isLValue() { |
| return false; |
| } |
| |
| @Override |
| public final ValueCategory getValueCategory() { |
| return ValueCategory.PRVALUE; |
| } |
| } |