bytecode/GetByIdVariant.h

   1 /*
   2  * Copyright (C) 2014 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 GetByIdVariant_h
  27 #define GetByIdVariant_h
  28
  29 #include "IntendedStructureChain.h"
  30 #include "JSCJSValue.h"
  31 #include "PropertyOffset.h"
  32 #include "StructureSet.h"
  33
  34 namespace JSC {
  35
  36 class GetByIdStatus;
  37 struct DumpContext;
  38
  39 class GetByIdVariant {
  40 public:
  41     GetByIdVariant(
  42         const StructureSet& structureSet = StructureSet(),
  43         PropertyOffset offset = invalidOffset, JSValue specificValue = JSValue(),
  44         PassRefPtr<IntendedStructureChain> chain = nullptr)
  45         : m_structureSet(structureSet)
  46         , m_chain(chain)
  47         , m_specificValue(specificValue)
  48         , m_offset(offset)
  49     {
  50         if (!structureSet.size()) {
  51             ASSERT(offset == invalidOffset);
  52             ASSERT(!specificValue);
  53             ASSERT(!chain);
  54         }
  55     }
  56
  57     bool isSet() const { return !!m_structureSet.size(); }
  58     bool operator!() const { return !isSet(); }
  59     const StructureSet& structureSet() const { return m_structureSet; }
  60     IntendedStructureChain* chain() const { return const_cast<IntendedStructureChain*>(m_chain.get()); }
  61     JSValue specificValue() const { return m_specificValue; }
  62     PropertyOffset offset() const { return m_offset; }
  63
  64     void dump(PrintStream&) const;
  65     void dumpInContext(PrintStream&, DumpContext*) const;
  66
  67 private:
  68     friend class GetByIdStatus;
  69
  70     StructureSet m_structureSet;
  71     RefPtr<IntendedStructureChain> m_chain;
  72     JSValue m_specificValue;
  73     PropertyOffset m_offset;
  74 };
  75
  76 } // namespace JSC
  77
  78 #endif // GetByIdVariant_h
  79