Index: Source/WTF/wtf/EnumClass.h |
diff --git a/Source/WTF/wtf/EnumClass.h b/Source/WTF/wtf/EnumClass.h |
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index a5729b3b97976e7a74632ab88593835824e56756..0000000000000000000000000000000000000000 |
--- a/Source/WTF/wtf/EnumClass.h |
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-/* |
- * 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 |