/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Rhino code, released
* May 6, 1999.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1997-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Steve Yegge
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU General Public License Version 2 or later (the "GPL"), in which
* case the provisions of the GPL are applicable instead of those above. If
* you wish to allow use of your version of this file only under the terms of
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* MPL, indicate your decision by deleting the provisions above and replacing
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* not delete the provisions above, a recipient may use your version of this
* file under either the MPL or the GPL.
*
* ***** END LICENSE BLOCK ***** */
package org.mozilla.javascript.ast;
import org.mozilla.javascript.Token;
/**
* AST node representing the ternary operator. Node type is
* {@link Token#HOOK}.
*
* <pre><i>ConditionalExpression</i> :
* LogicalORExpression
* LogicalORExpression ? AssignmentExpression
* : AssignmentExpression</pre>
*
* <i>ConditionalExpressionNoIn</i> :
* LogicalORExpressionNoIn
* LogicalORExpressionNoIn ? AssignmentExpression
* : AssignmentExpressionNoIn</pre>
*/
public class ConditionalExpression extends AstNode {
private AstNode testExpression;
private AstNode trueExpression;
private AstNode falseExpression;
private int questionMarkPosition = -1;
private int colonPosition = -1;
{
type = Token.HOOK;
}
public ConditionalExpression() {
}
public ConditionalExpression(int pos) {
super(pos);
}
public ConditionalExpression(int pos, int len) {
super(pos, len);
}
/**
* Returns test expression
*/
public AstNode getTestExpression() {
return testExpression;
}
/**
* Sets test expression, and sets its parent.
* @param testExpression test expression
* @throws IllegalArgumentException if testExpression is {@code null}
*/
public void setTestExpression(AstNode testExpression) {
assertNotNull(testExpression);
this.testExpression = testExpression;
testExpression.setParent(this);
}
/**
* Returns expression to evaluate if test is true
*/
public AstNode getTrueExpression() {
return trueExpression;
}
/**
* Sets expression to evaluate if test is true, and
* sets its parent to this node.
* @param trueExpression expression to evaluate if test is true
* @throws IllegalArgumentException if expression is {@code null}
*/
public void setTrueExpression(AstNode trueExpression) {
assertNotNull(trueExpression);
this.trueExpression = trueExpression;
trueExpression.setParent(this);
}
/**
* Returns expression to evaluate if test is false
*/
public AstNode getFalseExpression() {
return falseExpression;
}
/**
* Sets expression to evaluate if test is false, and sets its
* parent to this node.
* @param falseExpression expression to evaluate if test is false
* @throws IllegalArgumentException if {@code falseExpression}
* is {@code null}
*/
public void setFalseExpression(AstNode falseExpression) {
assertNotNull(falseExpression);
this.falseExpression = falseExpression;
falseExpression.setParent(this);
}
/**
* Returns position of ? token
*/
public int getQuestionMarkPosition() {
return questionMarkPosition;
}
/**
* Sets position of ? token
* @param questionMarkPosition position of ? token
*/
public void setQuestionMarkPosition(int questionMarkPosition) {
this.questionMarkPosition = questionMarkPosition;
}
/**
* Returns position of : token
*/
public int getColonPosition() {
return colonPosition;
}
/**
* Sets position of : token
* @param colonPosition position of : token
*/
public void setColonPosition(int colonPosition) {
this.colonPosition = colonPosition;
}
@Override
public boolean hasSideEffects() {
if (testExpression == null
|| trueExpression == null
|| falseExpression == null) codeBug();
return trueExpression.hasSideEffects()
&& falseExpression.hasSideEffects();
}
@Override
public String toSource(int depth) {
StringBuilder sb = new StringBuilder();
sb.append(makeIndent(depth));
sb.append(testExpression.toSource(depth));
sb.append(" ? ");
sb.append(trueExpression.toSource(0));
sb.append(" : ");
sb.append(falseExpression.toSource(0));
return sb.toString();
}
/**
* Visits this node, then the test-expression, the true-expression,
* and the false-expression.
*/
@Override
public void visit(NodeVisitor v) {
if (v.visit(this)) {
testExpression.visit(v);
trueExpression.visit(v);
falseExpression.visit(v);
}
}
}