runtime/PrivateName.h

   1 /*
   2  * Copyright (C) 2012 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. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef PrivateName_h
  27 #define PrivateName_h
  28
  29 #include <wtf/text/SymbolImpl.h>
  30
  31 namespace JSC {
  32
  33 class PrivateName {
  34 public:
  35     PrivateName()
  36         : m_uid(StringImpl::createSymbolEmpty())
  37     {
  38     }
  39
  40     explicit PrivateName(SymbolImpl& uid)
  41         : m_uid(&uid)
  42     {
  43     }
  44
  45     enum DescriptionTag { Description };
  46     explicit PrivateName(DescriptionTag, const String& description)
  47         : m_uid(StringImpl::createSymbol(description.impl()))
  48     {
  49     }
  50
  51     SymbolImpl* uid() const { return m_uid.get(); }
  52
  53     bool operator==(const PrivateName& other) const { return uid() == other.uid(); }
  54     bool operator!=(const PrivateName& other) const { return uid() != other.uid(); }
  55
  56 private:
  57     RefPtr<SymbolImpl> m_uid;
  58 };
  59
  60 }
  61
  62 #endif