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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.literal;
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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.nodes.*;
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16 import com.oracle.truffle.ruby.runtime.*;
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17
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18 /**
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19 * A node that does nothing and evaluates to Nil. A no-op.
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20 */
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21 @NodeInfo(shortName = "nil")
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22 public final class NilNode extends RubyNode {
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23
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24 public NilNode(RubyContext context, SourceSection sourceSection) {
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25 super(context, sourceSection);
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26 }
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27
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28 @Override
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29 public NilPlaceholder executeNilPlaceholder(VirtualFrame frame) {
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30 return NilPlaceholder.INSTANCE;
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31 }
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32
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33 @Override
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34 public Object execute(VirtualFrame frame) {
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35 return executeNilPlaceholder(frame);
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36 }
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37
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38 @Override
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39 public void executeVoid(VirtualFrame frame) {
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40 }
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41
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42 }
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