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comparison graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/methods/arguments/ReadPreArgumentNode.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.api.utilities.*;
16 import com.oracle.truffle.ruby.nodes.*;
17 import com.oracle.truffle.ruby.runtime.*;
18
19 /**
20 * Read pre-optional argument.
21 */
22 @NodeInfo(shortName = "read-pre-optional-argument")
23 public class ReadPreArgumentNode extends RubyNode {
24
25 private final int index;
26 private final boolean undefinedIfNotPresent;
27
28 private final BranchProfile notPresentProfile = new BranchProfile();
29
30 public ReadPreArgumentNode(RubyContext context, SourceSection sourceSection, int index, boolean undefinedIfNotPresent) {
31 super(context, sourceSection);
32 this.index = index;
33 this.undefinedIfNotPresent = undefinedIfNotPresent;
34 }
35
36 @Override
37 public Object execute(VirtualFrame frame) {
38 final Object[] arguments = frame.getArguments(RubyArguments.class).getArguments();
39
40 if (undefinedIfNotPresent) {
41 if (index >= arguments.length) {
42 notPresentProfile.enter();
43 return UndefinedPlaceholder.INSTANCE;
44 }
45 } else {
46 assert index < arguments.length;
47 }
48
49 return arguments[index];
50 }
51
52 }