91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
#pragma once
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#include <type_traits>
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template<typename E>
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struct is_enum_bitfield { static constexpr bool value = false; };
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#define IS_BITFIELD(name) \
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template<> struct ::is_enum_bitfield<name> {static constexpr bool value=true;}
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template <typename E, typename F>
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typename std::enable_if<is_enum_bitfield<E>::value,E>::type
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operator & (E lhs, F rhs)
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{
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return static_cast<E> (
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static_cast<typename std::underlying_type<E>::type>(lhs) &
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static_cast<typename std::underlying_type<E>::type>(rhs));
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}
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template <typename E, typename F>
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typename std::enable_if<is_enum_bitfield<E>::value,E>::type
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operator | (E lhs, F rhs)
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{
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return static_cast<E> (
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static_cast<typename std::underlying_type<E>::type>(lhs) |
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static_cast<typename std::underlying_type<E>::type>(rhs));
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}
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template <typename E, typename F>
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typename std::enable_if<is_enum_bitfield<E>::value,E>::type
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operator ^ (E lhs, F rhs)
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{
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return static_cast<E> (
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static_cast<typename std::underlying_type<E>::type>(lhs) ^
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static_cast<typename std::underlying_type<E>::type>(rhs));
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}
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template <typename E>
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typename std::enable_if<is_enum_bitfield<E>::value,E>::type
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operator ~ (E rhs)
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{
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return static_cast<E>(~static_cast<typename std::underlying_type<E>::type>(rhs));
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}
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template <typename E, typename F>
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typename std::enable_if<is_enum_bitfield<E>::value,E>::type&
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operator |= (E &lhs, F rhs)
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{
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lhs = static_cast<E>(
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static_cast<typename std::underlying_type<E>::type>(lhs) |
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static_cast<typename std::underlying_type<E>::type>(rhs));
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return lhs;
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}
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template <typename E, typename F>
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typename std::enable_if<is_enum_bitfield<E>::value,E>::type&
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operator &= (E &lhs, F rhs)
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{
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lhs = static_cast<E>(
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static_cast<typename std::underlying_type<E>::type>(lhs) &
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static_cast<typename std::underlying_type<E>::type>(rhs));
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return lhs;
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}
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template <typename E, typename F>
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typename std::enable_if<is_enum_bitfield<E>::value,E>::type&
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operator ^= (E &lhs, F rhs)
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{
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lhs = static_cast<E>(
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static_cast<typename std::underlying_type<E>::type>(lhs) ^
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static_cast<typename std::underlying_type<E>::type>(rhs));
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return lhs;
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}
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template <typename E>
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typename std::enable_if<is_enum_bitfield<E>::value,bool>::type
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operator ! (E rhs)
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{
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return static_cast<typename std::underlying_type<E>::type>(rhs) == 0;
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}
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template <typename E>
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typename std::enable_if<is_enum_bitfield<E>::value,bool>::type
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bitfield_has(E set, E flag)
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{
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return (set & flag) == flag;
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}
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