org.mozilla.javascript.ast.Yield Maven / Gradle / Ivy
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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.javascript.ast;
import org.mozilla.javascript.Token;
/**
* AST node for JavaScript 1.7 {@code yield} expression or statement.
* Node type is {@link Token#YIELD}.
*
*
Yield :
* yield [no LineTerminator here] [non-paren Expression] ;
*/
public class Yield extends AstNode {
private AstNode value;
{
type = Token.YIELD;
}
public Yield() {
}
public Yield(int pos) {
super(pos);
}
public Yield(int pos, int len) {
super(pos, len);
}
public Yield(int pos, int len, AstNode value) {
super(pos, len);
setValue(value);
}
/**
* Returns yielded expression, {@code null} if none
*/
public AstNode getValue() {
return value;
}
/**
* Sets yielded expression, and sets its parent to this node.
* @param expr the value to yield. Can be {@code null}.
*/
public void setValue(AstNode expr) {
this.value = expr;
if (expr != null)
expr.setParent(this);
}
@Override
public String toSource(int depth) {
return value == null
? "yield"
: "yield " + value.toSource(0);
}
/**
* Visits this node, and if present, the yielded value.
*/
@Override
public void visit(NodeVisitor v) {
if (v.visit(this) && value != null) {
value.visit(v);
}
}
}