runtime/PropertyName.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 PropertyName_h
  27 #define PropertyName_h
  28
  29 #include "Identifier.h"
  30 #include "PrivateName.h"
  31 #include <wtf/Optional.h>
  32
  33 namespace JSC {
  34
  35 class PropertyName {
  36 public:
  37     PropertyName(UniquedStringImpl* propertyName)
  38         : m_impl(propertyName)
  39     {
  40     }
  41
  42     PropertyName(const Identifier& propertyName)
  43         : PropertyName(propertyName.impl())
  44     {
  45     }
  46
  47     PropertyName(const PrivateName& propertyName)
  48         : m_impl(propertyName.uid())
  49     {
  50         ASSERT(m_impl);
  51         ASSERT(m_impl->isSymbol());
  52     }
  53
  54     bool isSymbol()
  55     {
  56         return m_impl && m_impl->isSymbol();
  57     }
  58
  59     UniquedStringImpl* uid() const
  60     {
  61         return m_impl;
  62     }
  63
  64     AtomicStringImpl* publicName() const
  65     {
  66         return (!m_impl || m_impl->isSymbol()) ? nullptr : static_cast<AtomicStringImpl*>(m_impl);
  67     }
  68
  69     void dump(PrintStream& out) const
  70     {
  71         if (m_impl)
  72             out.print(m_impl);
  73         else
  74             out.print("<null property name>");
  75     }
  76
  77 private:
  78     UniquedStringImpl* m_impl;
  79 };
  80
  81 inline bool operator==(PropertyName a, const Identifier& b)
  82 {
  83     return a.uid() == b.impl();
  84 }
  85
  86 inline bool operator==(const Identifier& a, PropertyName b)
  87 {
  88     return a.impl() == b.uid();
  89 }
  90
  91 inline bool operator==(PropertyName a, PropertyName b)
  92 {
  93     return a.uid() == b.uid();
  94 }
  95
  96 inline bool operator==(PropertyName a, const char* b)
  97 {
  98     return equal(a.uid(), b);
  99 }
 100
 101 inline bool operator!=(PropertyName a, const Identifier& b)
 102 {
 103     return a.uid() != b.impl();
 104 }
 105
 106 inline bool operator!=(const Identifier& a, PropertyName b)
 107 {
 108     return a.impl() != b.uid();
 109 }
 110
 111 inline bool operator!=(PropertyName a, PropertyName b)
 112 {
 113     return a.uid() != b.uid();
 114 }
 115
 116 ALWAYS_INLINE Optional<uint32_t> parseIndex(PropertyName propertyName)
 117 {
 118     auto uid = propertyName.uid();
 119     if (!uid)
 120         return Nullopt;
 121     if (uid->isSymbol())
 122         return Nullopt;
 123     return parseIndex(*uid);
 124 }
 125
 126 }
 127
 128 #endif