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annotate graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/methods/arguments/ReadBlockArgumentNode.java @ 13514:0fbee3eb71f0

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Ruby: import project.
author Chris Seaton <chris.seaton@oracle.com>
date Mon, 06 Jan 2014 17:12:09 +0000
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13514
0fbee3eb71f0 Ruby: import project.
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1 /*
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2 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
0fbee3eb71f0 Ruby: import project.
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3 * code is released under a tri EPL/GPL/LGPL license. You can use it,
0fbee3eb71f0 Ruby: import project.
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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.methods.arguments;
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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 import com.oracle.truffle.ruby.runtime.core.*;
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18
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19 /**
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20 * Read the block as a {@code Proc}.
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21 */
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22 @NodeInfo(shortName = "read-block-argument")
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23 public class ReadBlockArgumentNode extends RubyNode {
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24
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25 private final boolean undefinedIfNotPresent;
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26
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27 public ReadBlockArgumentNode(RubyContext context, SourceSection sourceSection, boolean undefinedIfNotPresent) {
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28 super(context, sourceSection);
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29 this.undefinedIfNotPresent = undefinedIfNotPresent;
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30 }
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31
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32 @Override
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33 public Object execute(VirtualFrame frame) {
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34 final RubyArguments arguments = frame.getArguments(RubyArguments.class);
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35 final RubyProc block = arguments.getBlock();
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36
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37 if (block == null) {
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38 if (undefinedIfNotPresent) {
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39 return UndefinedPlaceholder.INSTANCE;
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40 } else {
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41 return NilPlaceholder.INSTANCE;
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42 }
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43 } else {
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44 return block;
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45 }
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46 }
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47
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48 }