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/*
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.nashorn.api.tree;
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/**
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* A tree node for <a href="http://www.ecma-international.org/ecma-262/6.0/#sec-generator-function-definitions">yield expressions</a> used in generator functions.
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*
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* For example:
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* <pre>
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* <em>function*</em> id(){
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* var index = 0;
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* while(index < 10)
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* <em>yield index++;</em>
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* }
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* </pre>
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*
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* @since 9
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*/
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public interface YieldTree extends ExpressionTree {
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/**
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* Returns the expression that is yielded.
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*
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* @return The expression that is yielded.
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*/
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ExpressionTree getExpression();
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/**
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* Is this a yield * expression in a generator function?
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*
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* For example:
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* <pre>
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* function* id(){
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* yield 1;
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* <em>yield * anotherGeneratorFunc();</em>
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* yield 10;
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* }
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* </pre>
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*
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*
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* @return true if this is a yield * expression
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*/
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boolean isStar();
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}
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