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comparison 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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13513:64a23ce736a0 13514:0fbee3eb71f0
1 /*
2 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
3 * code is released under a tri EPL/GPL/LGPL license. You can use it,
4 * redistribute it and/or modify it under the terms of the:
5 *
6 * Eclipse Public License version 1.0
7 * GNU General Public License version 2
8 * GNU Lesser General Public License version 2.1
9 */
10 package com.oracle.truffle.ruby.nodes.methods.arguments;
11
12 import com.oracle.truffle.api.*;
13 import com.oracle.truffle.api.frame.*;
14 import com.oracle.truffle.api.nodes.*;
15 import com.oracle.truffle.ruby.nodes.*;
16 import com.oracle.truffle.ruby.runtime.*;
17 import com.oracle.truffle.ruby.runtime.core.*;
18
19 /**
20 * Read the block as a {@code Proc}.
21 */
22 @NodeInfo(shortName = "read-block-argument")
23 public class ReadBlockArgumentNode extends RubyNode {
24
25 private final boolean undefinedIfNotPresent;
26
27 public ReadBlockArgumentNode(RubyContext context, SourceSection sourceSection, boolean undefinedIfNotPresent) {
28 super(context, sourceSection);
29 this.undefinedIfNotPresent = undefinedIfNotPresent;
30 }
31
32 @Override
33 public Object execute(VirtualFrame frame) {
34 final RubyArguments arguments = frame.getArguments(RubyArguments.class);
35 final RubyProc block = arguments.getBlock();
36
37 if (block == null) {
38 if (undefinedIfNotPresent) {
39 return UndefinedPlaceholder.INSTANCE;
40 } else {
41 return NilPlaceholder.INSTANCE;
42 }
43 } else {
44 return block;
45 }
46 }
47
48 }