mirror of https://github.com/axmolengine/axmol.git
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
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#pragma once
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#include <type_traits>
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namespace cocos2d{
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template<typename Enum>
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struct EnableBitMaskOperators
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{
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static const bool enable = false;
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};
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template<typename Enum>
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typename std::enable_if<EnableBitMaskOperators<Enum>::enable, Enum>::type
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operator |(Enum lhs, Enum rhs)
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{
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using underlying = typename std::underlying_type<Enum>::type;
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return static_cast<Enum> (
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static_cast<underlying>(lhs) |
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static_cast<underlying>(rhs)
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);
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}
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template<typename Enum>
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typename std::enable_if<EnableBitMaskOperators<Enum>::enable, bool>::type
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operator ==(Enum lhs, Enum rhs)
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{
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using underlying = typename std::underlying_type<Enum>::type;
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static_cast<underlying>(lhs) == static_cast<underlying>(rhs);
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}
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template<typename Enum>
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typename std::enable_if<EnableBitMaskOperators<Enum>::enable, Enum>::type&
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operator |=(Enum& lhs, Enum rhs)
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{
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using underlying = typename std::underlying_type<Enum>::type;
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lhs = static_cast<Enum> (
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static_cast<underlying>(lhs) |
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static_cast<underlying>(rhs)
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);
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return lhs;
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}
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template<typename Enum>
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typename std::enable_if<EnableBitMaskOperators<Enum>::enable, unsigned int>::type
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operator &(Enum lhs, Enum rhs)
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{
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using underlying = typename std::underlying_type<Enum>::type;
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using impl_type = typename std::make_unsigned<underlying>::type;
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return impl_type (
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static_cast<impl_type>(lhs) &
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static_cast<impl_type>(rhs)
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);
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}
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#define ENABLE_BITMASK_OPERATORS(x) \
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template<> \
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struct EnableBitMaskOperators<x> \
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{ \
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static const bool enable = true; \
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};
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} // end of namespace cocos2d{
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