1/*
2 * Copyright (C) 2018 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "ObjectPropertyConditionSet.h"
29#include "StructureSet.h"
30
31namespace JSC {
32
33class InstanceOfStatus;
34
35class InstanceOfVariant {
36 WTF_MAKE_FAST_ALLOCATED;
37public:
38 InstanceOfVariant() = default;
39 InstanceOfVariant(const StructureSet&, const ObjectPropertyConditionSet&, JSObject* prototype, bool isHit);
40
41 explicit operator bool() const { return !!m_structureSet.size(); }
42
43 const StructureSet& structureSet() const { return m_structureSet; }
44 StructureSet& structureSet() { return m_structureSet; }
45
46 const ObjectPropertyConditionSet& conditionSet() const { return m_conditionSet; }
47
48 JSObject* prototype() const { return m_prototype; }
49
50 bool isHit() const { return m_isHit; }
51
52 bool attemptToMerge(const InstanceOfVariant& other);
53
54 void dump(PrintStream&) const;
55 void dumpInContext(PrintStream&, DumpContext*) const;
56
57 bool overlaps(const InstanceOfVariant& other)
58 {
59 return structureSet().overlaps(other.structureSet());
60 }
61
62private:
63 friend class InstanceOfStatus;
64
65 StructureSet m_structureSet;
66 ObjectPropertyConditionSet m_conditionSet;
67 JSObject* m_prototype { nullptr };
68 bool m_isHit { false };
69};
70
71} // namespace JSC
72
73