runtime/JSZombie.h

   1 /*
   2  * Copyright (C) 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 JSZombie_h
  27 #define JSZombie_h
  28
  29 #include "JSCell.h"
  30 #include "Structure.h"
  31
  32 #if ENABLE(JSC_ZOMBIES)
  33 namespace JSC {
  34
  35 class JSZombie : public JSCell {
  36 public:
  37     JSZombie(JSGlobalData& globalData, const ClassInfo* oldInfo, Structure* structure)
  38         : JSCell(globalData, structure)
  39         , m_oldInfo(oldInfo)
  40     {
  41         ASSERT(inherits(&s_info));
  42     }
  43
  44     virtual bool isZombie() const { return true; }
  45
  46     virtual bool isGetterSetter() const { ASSERT_NOT_REACHED(); return false; }
  47     virtual bool isAPIValueWrapper() const { ASSERT_NOT_REACHED(); return false; }
  48     virtual bool isPropertyNameIterator() const { ASSERT_NOT_REACHED(); return false; }
  49     virtual CallType getCallData(CallData&) { ASSERT_NOT_REACHED(); return CallTypeNone; }
  50     virtual ConstructType getConstructData(ConstructData&) { ASSERT_NOT_REACHED(); return ConstructTypeNone; }
  51     virtual bool getUInt32(uint32_t&) const { ASSERT_NOT_REACHED(); return false; }
  52     virtual JSValue toPrimitive(ExecState*, PreferredPrimitiveType) const { ASSERT_NOT_REACHED(); return jsNull(); }
  53     virtual bool getPrimitiveNumber(ExecState*, double&, JSValue&) { ASSERT_NOT_REACHED(); return false; }
  54     virtual bool toBoolean(ExecState*) const { ASSERT_NOT_REACHED(); return false; }
  55     virtual double toNumber(ExecState*) const { ASSERT_NOT_REACHED(); return 0.0; }
  56     virtual UString toString(ExecState*) const { ASSERT_NOT_REACHED(); return ""; }
  57     virtual JSObject* toObject(ExecState*) const { ASSERT_NOT_REACHED(); return 0; }
  58     virtual void visitChildren(SlotVisitor&) { ASSERT_NOT_REACHED(); }
  59     virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&) { ASSERT_NOT_REACHED(); }
  60     virtual void put(ExecState*, unsigned, JSValue) { ASSERT_NOT_REACHED(); }
  61     virtual bool deleteProperty(ExecState*, const Identifier&) { ASSERT_NOT_REACHED(); return false; }
  62     virtual bool deleteProperty(ExecState*, unsigned) { ASSERT_NOT_REACHED(); return false; }
  63     virtual JSObject* toThisObject(ExecState*) const { ASSERT_NOT_REACHED(); return 0; }
  64     virtual JSValue toStrictThisObject(ExecState*) const { ASSERT_NOT_REACHED(); return JSValue(); }
  65     virtual JSValue getJSNumber() { ASSERT_NOT_REACHED(); return jsNull(); }
  66     virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&) { ASSERT_NOT_REACHED(); return false; }
  67     virtual bool getOwnPropertySlot(ExecState*, unsigned, PropertySlot&) { ASSERT_NOT_REACHED(); return false; }
  68
  69     static Structure* createStructure(JSGlobalData& globalData, JSValue prototype)
  70     {
  71         return Structure::create(globalData, prototype, TypeInfo(LeafType, 0), AnonymousSlotCount, &s_info);
  72     }
  73
  74     static const ClassInfo s_info;
  75
  76 private:
  77     const ClassInfo* m_oldInfo;
  78 };
  79
  80 }
  81
  82 #endif // ENABLE(JSC_ZOMBIES)
  83
  84 #endif // JSZombie_h