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1 /*
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2 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
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3 * code is released under a tri EPL/GPL/LGPL license. You can use it,
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4 * redistribute it and/or modify it under the terms of the:
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5 *
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6 * Eclipse Public License version 1.0
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7 * GNU General Public License version 2
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8 * GNU Lesser General Public License version 2.1
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9 */
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10 package com.oracle.truffle.ruby.nodes;
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11
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12 import com.oracle.truffle.api.*;
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13 import com.oracle.truffle.api.frame.*;
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14 import com.oracle.truffle.api.nodes.*;
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15 import com.oracle.truffle.ruby.runtime.*;
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16
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17 /**
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18 * Switches execution to the parallel {@link RubyNode#isDefined} semantic path. Represents the
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19 * {@code defined?} keyword in Ruby.
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20 */
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21 @NodeInfo(shortName = "defined")
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22 public class DefinedNode extends RubyNode {
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23
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24 @Child protected RubyNode child;
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25
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26 public DefinedNode(RubyContext context, SourceSection sourceSection, RubyNode child) {
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27 super(context, sourceSection);
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28 this.child = adoptChild(child);
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29 }
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30
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31 @Override
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32 public Object execute(VirtualFrame frame) {
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33 return child.isDefined(frame);
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34 }
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35
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36 }
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