1/*
2 * Copyright (c) 2014, 2015, 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 */
23package org.graalvm.compiler.core.match;
24
25import org.graalvm.compiler.core.common.LIRKind;
26import org.graalvm.compiler.core.gen.NodeLIRBuilder;
27
28import jdk.vm.ci.meta.Value;
29
30/**
31 * A wrapper value for the lazy evaluation of a complex match. There's an intermediate class for the
32 * closure because Value is serializable which is a hassle for the little inner classes which
33 * usually occur here.
34 */
35public class ComplexMatchValue extends Value {
36
37    /**
38     * This is the Value of a node which was matched as part of a complex match. The value isn't
39     * actually useable but this marks it as having been evaluated.
40     */
41    public static final Value INTERIOR_MATCH = new Value(LIRKind.Illegal) {
42
43        @Override
44        public String toString() {
45            return "INTERIOR_MATCH";
46        }
47
48        @Override
49        public boolean equals(Object other) {
50            // This class is a singleton
51            return other != null && getClass() == other.getClass();
52        }
53    };
54
55    final ComplexMatchResult result;
56
57    public ComplexMatchValue(ComplexMatchResult result) {
58        super(LIRKind.Illegal);
59        this.result = result;
60    }
61
62    public Value evaluate(NodeLIRBuilder builder) {
63        return result.evaluate(builder);
64    }
65}
66