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comparison graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/objects/instancevariables/ReadInstanceVariableNode.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.objects.instancevariables;
11
12 import com.oracle.truffle.api.*;
13 import com.oracle.truffle.api.frame.*;
14 import com.oracle.truffle.ruby.nodes.*;
15 import com.oracle.truffle.ruby.runtime.*;
16 import com.oracle.truffle.ruby.runtime.objects.*;
17
18 public abstract class ReadInstanceVariableNode extends RubyNode implements ReadNode {
19
20 protected final String name;
21 @Child protected RubyNode receiver;
22
23 public ReadInstanceVariableNode(RubyContext context, SourceSection sourceSection, String name, RubyNode receiver) {
24 super(context, sourceSection);
25 this.name = name;
26 this.receiver = adoptChild(receiver);
27 }
28
29 public ReadInstanceVariableNode respecialize(RubyBasicObject receiverObject) {
30 final StorageLocation storageLocation = receiverObject.getUpdatedObjectLayout().findStorageLocation(name);
31
32 if (storageLocation == null) {
33 return new ReadMissingInstanceVariableNode(getSourceSection(), name, receiver, receiverObject.getObjectLayout(), getContext());
34 }
35
36 if (storageLocation instanceof FixnumStorageLocation) {
37 return new ReadFixnumInstanceVariableNode(getContext(), getSourceSection(), name, receiver, storageLocation.getObjectLayout(), (FixnumStorageLocation) storageLocation);
38 } else if (storageLocation instanceof FloatStorageLocation) {
39 return new ReadFloatInstanceVariableNode(getContext(), getSourceSection(), name, receiver, storageLocation.getObjectLayout(), (FloatStorageLocation) storageLocation);
40 } else {
41 return new ReadObjectInstanceVariableNode(getContext(), getSourceSection(), name, receiver, storageLocation.getObjectLayout(), (ObjectStorageLocation) storageLocation);
42 }
43 }
44
45 public WriteInstanceVariableNode makeWriteNode(RubyNode rhs) {
46 return new UninitializedWriteInstanceVariableNode(getContext(), getEncapsulatingSourceSection(), name, (RubyNode) receiver.copy(), rhs);
47 }
48
49 public String getName() {
50 return name;
51 }
52
53 public RubyNode getReceiver() {
54 return receiver;
55 }
56
57 @Override
58 public Object isDefined(VirtualFrame frame) {
59 final RubyContext context = getContext();
60
61 try {
62 final Object receiverObject = receiver.execute(frame);
63 final RubyBasicObject receiverRubyObject = context.getCoreLibrary().box(receiverObject);
64
65 final ObjectLayout layout = receiverRubyObject.getObjectLayout();
66 final StorageLocation storageLocation = layout.findStorageLocation(name);
67
68 if (storageLocation.isSet(receiverRubyObject)) {
69 return context.makeString("instance-variable");
70 } else {
71 return NilPlaceholder.INSTANCE;
72 }
73 } catch (Exception e) {
74 return NilPlaceholder.INSTANCE;
75 }
76 }
77 }