Move Source/WTF/wtf to Source/wtf

Source/WTF/wtf/EnumClass.h

-/*
- * Copyright (C) 2013 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. ``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
- * 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 WTF_EnumClass_h
-#define WTF_EnumClass_h
-
-#include <wtf/Compiler.h>
-
-namespace WTF {
-
-// How to define a type safe enum list using the ENUM_CLASS macros?
-// ===============================================================
-// To get an enum list like this:
-//
-//     enum class MyEnums {
-//         Value1,
-//         Value2,
-//         ...
-//         ValueN
-//     };
-//
-// ... write this:
-//
-//     ENUM_CLASS(MyEnums) {
-//         Value1,
-//         Value2,
-//         ...
-//         ValueN
-//     } ENUM_CLASS_END(MyEnums);
-//
-// The ENUM_CLASS macros will use C++11's enum class if the compiler supports it.
-// Otherwise, it will use the EnumClass template below.
-
-#if COMPILER_SUPPORTS(CXX_STRONG_ENUMS)
-
-#define ENUM_CLASS(__enumName) \
-    enum class __enumName
-
-#define ENUM_CLASS_END(__enumName)
-
-#else // !COMPILER_SUPPORTS(CXX_STRONG_ENUMS)
-
-// How to define a type safe enum list using the EnumClass template?
-// ================================================================
-// Definition should be a struct that encapsulates an enum list.
-// The enum list should be names Enums.
-//
-// Here's an example of how to define a type safe enum named MyEnum using
-// the EnumClass template:
-//
-//     struct MyEnumDefinition {
-//         enum Enums {
-//             ValueDefault,
-//             Value1,
-//             ...
-//             ValueN
-//         };
-//     };
-//     typedef EnumClass<MyEnumDefinition, MyEnumDefinition::ValueDefault> MyEnum;
-//
-// With that, you can now use MyEnum enum values as follow:
-//
-//     MyEnum value1; // value1 is assigned MyEnum::ValueDefault by default.
-//     MyEnum value2 = MyEnum::Value1; // value2 is assigned MyEnum::Value1;
-
-template <typename Definition>
-class EnumClass : public Definition {
-    typedef enum Definition::Enums Value;
-public:
-    ALWAYS_INLINE EnumClass() { }
-    ALWAYS_INLINE EnumClass(Value value) : m_value(value) { }
-
-    ALWAYS_INLINE Value value() const { return m_value; }
-
-    ALWAYS_INLINE bool operator==(const EnumClass other) { return m_value == other.m_value; }
-    ALWAYS_INLINE bool operator!=(const EnumClass other) { return m_value != other.m_value; }
-    ALWAYS_INLINE bool operator<(const EnumClass other) { return m_value < other.m_value; }
-    ALWAYS_INLINE bool operator<=(const EnumClass other) { return m_value <= other.m_value; }
-    ALWAYS_INLINE bool operator>(const EnumClass other) { return m_value > other.m_value; }
-    ALWAYS_INLINE bool operator>=(const EnumClass other) { return m_value >= other.m_value; }
-
-    ALWAYS_INLINE bool operator==(const Value value) { return m_value == value; }
-    ALWAYS_INLINE bool operator!=(const Value value) { return m_value != value; }
-    ALWAYS_INLINE bool operator<(const Value value) { return m_value < value; }
-    ALWAYS_INLINE bool operator<=(const Value value) { return m_value <= value; }
-    ALWAYS_INLINE bool operator>(const Value value) { return m_value > value; }
-    ALWAYS_INLINE bool operator>=(const Value value) { return m_value >= value; }
-
-    ALWAYS_INLINE operator Value() { return m_value; }
-
-private:
-    Value m_value;
-};
-
-#define ENUM_CLASS(__enumName) \
-    struct __enumName ## Definition { \
-        enum Enums
-
-#define ENUM_CLASS_END(__enumName) \
-        ; \
-    }; \
-    typedef EnumClass< __enumName ## Definition > __enumName
-
-#endif // !COMPILER_SUPPORTS(CXX_STRONG_ENUMS)
-
-} // namespace WTF
-
-#if !COMPILER_SUPPORTS(CXX_STRONG_ENUMS)
-using WTF::EnumClass;
-#endif
-
-#endif // WTF_EnumClass_h