1/*
2 * Copyright (C) 2015 Apple Inc. All rights reserved.
3 * Copyright (C) 2016 Yusuke Suzuki <[email protected]>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#include "Identifier.h"
30#include <wtf/RefPtr.h>
31
32namespace JSC {
33
34class ModuleScopeData : public RefCounted<ModuleScopeData> {
35WTF_MAKE_NONCOPYABLE(ModuleScopeData);
36WTF_MAKE_FAST_ALLOCATED;
37public:
38 typedef HashMap<RefPtr<UniquedStringImpl>, Vector<RefPtr<UniquedStringImpl>>, IdentifierRepHash, HashTraits<RefPtr<UniquedStringImpl>>> IdentifierAliasMap;
39
40 static Ref<ModuleScopeData> create() { return adoptRef(*new ModuleScopeData); }
41
42 const IdentifierAliasMap& exportedBindings() const { return m_exportedBindings; }
43
44 bool exportName(const Identifier& exportedName)
45 {
46 return m_exportedNames.add(exportedName.impl()).isNewEntry;
47 }
48
49 void exportBinding(const Identifier& localName, const Identifier& exportedName)
50 {
51 m_exportedBindings.add(localName.impl(), Vector<RefPtr<UniquedStringImpl>>()).iterator->value.append(exportedName.impl());
52 }
53
54 void exportBinding(const Identifier& localName)
55 {
56 exportBinding(localName, localName);
57 }
58
59private:
60 ModuleScopeData() = default;
61
62 IdentifierSet m_exportedNames { };
63 IdentifierAliasMap m_exportedBindings { };
64};
65
66} // namespace
67