1/* 2 * Copyright (C) 2008, 2009 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 JSNameScope_h 27#define JSNameScope_h 28 29#include "JSGlobalObject.h" 30#include "JSVariableObject.h" 31 32namespace JSC { 33 34// Used for scopes with a single named variable: catch and named function expression. 35class JSNameScope : public JSVariableObject { 36public: 37 typedef JSVariableObject Base; 38 39 static JSNameScope* create(ExecState* exec, const Identifier& identifier, JSValue value, unsigned attributes) 40 { 41 VM& vm = exec->vm(); 42 JSNameScope* scopeObject = new (NotNull, allocateCell<JSNameScope>(vm.heap)) JSNameScope(vm, exec->lexicalGlobalObject(), exec->scope()); 43 scopeObject->finishCreation(vm, identifier, value, attributes); 44 return scopeObject; 45 } 46 47 static JSNameScope* create(VM& vm, JSGlobalObject* globalObject, const Identifier& identifier, JSValue value, unsigned attributes, JSScope* next) 48 { 49 JSNameScope* scopeObject = new (NotNull, allocateCell<JSNameScope>(vm.heap)) JSNameScope(vm, globalObject, next); 50 scopeObject->finishCreation(vm, identifier, value, attributes); 51 return scopeObject; 52 } 53 54 static void visitChildren(JSCell*, SlotVisitor&); 55 static JSValue toThis(JSCell*, ExecState*, ECMAMode); 56 static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&); 57 static void put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&); 58 59 static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto) { return Structure::create(vm, globalObject, proto, TypeInfo(NameScopeObjectType, StructureFlags), info()); } 60 61 DECLARE_INFO; 62 63protected: 64 void finishCreation(VM& vm, const Identifier& identifier, JSValue value, unsigned attributes) 65 { 66 Base::finishCreation(vm); 67 m_registerStore.set(vm, this, value); 68 symbolTable()->add(identifier.impl(), SymbolTableEntry(-1, attributes)); 69 } 70 71 static const unsigned StructureFlags = OverridesGetOwnPropertySlot | OverridesVisitChildren | Base::StructureFlags; 72 73private: 74 JSNameScope(VM& vm, JSGlobalObject* globalObject, JSScope* next) 75 : Base( 76 vm, 77 globalObject->nameScopeStructure(), 78 reinterpret_cast<Register*>(&m_registerStore + 1), 79 next 80 ) 81 { 82 } 83 84 WriteBarrier<Unknown> m_registerStore; 85}; 86 87} 88 89#endif // JSNameScope_h 90