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comparison graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/access/SLWritePropertyNode.java @ 18411:dc2e000bed40

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SL: add basic support for creating objects and accessing properties
author Andreas Woess <andreas.woess@jku.at>
date Tue, 18 Nov 2014 23:02:58 +0100
parents
children 997bc9764a9a
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18410:f444ef4684ec 18411:dc2e000bed40
1 /*
2 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package com.oracle.truffle.sl.nodes.access;
24
25 import java.util.*;
26
27 import com.oracle.truffle.api.frame.*;
28 import com.oracle.truffle.api.nodes.*;
29 import com.oracle.truffle.api.source.*;
30 import com.oracle.truffle.sl.*;
31 import com.oracle.truffle.sl.nodes.*;
32
33 /**
34 * The node for setting a property of an object. When executed, this node first evaluates the value
35 * expression on the right hand side of the equals operator, followed by the object expression on
36 * the left side of the dot operator, and then sets the named property of this object to the new
37 * value if the property already exists or adds a new property. Finally, it returns the new value.
38 */
39 @NodeInfo(shortName = ".=")
40 public final class SLWritePropertyNode extends SLExpressionNode {
41
42 public static SLWritePropertyNode create(SourceSection src, SLExpressionNode receiverNode, String propertyName, SLExpressionNode valueNode) {
43 return new SLWritePropertyNode(src, receiverNode, propertyName, valueNode);
44 }
45
46 @Child protected SLExpressionNode receiverNode;
47 protected final String propertyName;
48 @Child protected SLExpressionNode valueNode;
49
50 private SLWritePropertyNode(SourceSection src, SLExpressionNode receiverNode, String propertyName, SLExpressionNode valueNode) {
51 super(src);
52 this.receiverNode = receiverNode;
53 this.propertyName = propertyName;
54 this.valueNode = valueNode;
55 }
56
57 @SuppressWarnings("unchecked")
58 @Override
59 public Object executeGeneric(VirtualFrame frame) {
60 Object value = valueNode.executeGeneric(frame);
61 Object object = receiverNode.executeGeneric(frame);
62 if (object instanceof Map) {
63 ((Map<Object, Object>) object).put(propertyName, value);
64 } else {
65 throw new SLException("unexpected receiver type");
66 }
67 return value;
68 }
69 }