text: /*
   * Copyright (C) 2011 Apple Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   * THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef HandleTypes_h
  #define HandleTypes_h
  
  #include "JSValue.h"
  
  namespace JSC {
  
  typedef enum { } Unknown;
  typedef JSValue* HandleSlot;
  
  template<typename T> struct HandleTypes {
      typedef T* ExternalType;
      static ExternalType getFromSlot(HandleSlot slot) { return (slot && *slot) ? reinterpret_cast<ExternalType>(slot->asCell()) : 0; }
      static JSValue toJSValue(T* cell) { return reinterpret_cast<JSCell*>(cell); }
      template<typename U> static void validateUpcast() { T* temp; temp = (U*)0; }
  };
  
  template<> struct HandleTypes<Unknown> {
      typedef JSValue ExternalType;
      static ExternalType getFromSlot(HandleSlot slot) { return slot ? *slot : JSValue(); }
      static JSValue toJSValue(const JSValue& v) { return v; }
      template<typename U> static void validateUpcast() { }
  };
  
  } // namespace JSC
  
  #endif // HandleTypes_h
  