1/*
2 * Copyright (C) 2015 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#ifndef JSGlobalLexicalEnvironment_h
27#define JSGlobalLexicalEnvironment_h
28
29#include "JSSegmentedVariableObject.h"
30
31namespace JSC {
32
33class JSGlobalLexicalEnvironment : public JSSegmentedVariableObject {
34
35public:
36 typedef JSSegmentedVariableObject Base;
37
38 static const unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot;
39
40 static JSGlobalLexicalEnvironment* create(VM& vm, Structure* structure, JSScope* parentScope)
41 {
42 JSGlobalLexicalEnvironment* result =
43 new (NotNull, allocateCell<JSGlobalLexicalEnvironment>(vm.heap)) JSGlobalLexicalEnvironment(vm, structure, parentScope);
44 result->finishCreation(vm);
45 result->symbolTable()->setScopeType(SymbolTable::ScopeType::GlobalLexicalScope);
46 return result;
47 }
48
49 static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
50 static void put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);
51
52 bool isEmpty() const { return !symbolTable()->size(); }
53
54 DECLARE_INFO;
55
56 static Structure* createStructure(VM& vm, JSGlobalObject* globalObject)
57 {
58 return Structure::create(vm, globalObject, jsNull(), TypeInfo(ClosureObjectType, StructureFlags), info());
59 }
60
61protected:
62 JSGlobalLexicalEnvironment(VM& vm, Structure* structure, JSScope* scope)
63 : Base(vm, structure, scope)
64 {
65 }
66};
67
68} // namespace JSC
69
70#endif // JSGlobalLexicalEnvironment_h
71
72