| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| #ifndef SkEnumOperators_DEFINED |
| #define SkEnumOperators_DEFINED |
| |
| #include <type_traits> |
| |
| namespace sknonstd { |
| template <typename T> struct is_bitmask_enum : std::false_type {}; |
| |
| template <typename E> |
| std::enable_if_t<sknonstd::is_bitmask_enum<E>::value, bool> constexpr Any(E e) { |
| return static_cast<std::underlying_type_t<E>>(e) != 0; |
| } |
| } // namespace sknonstd |
| |
| template <typename E> |
| std::enable_if_t<sknonstd::is_bitmask_enum<E>::value, E> constexpr operator|(E l, E r) { |
| using U = std::underlying_type_t<E>; |
| return static_cast<E>(static_cast<U>(l) | static_cast<U>(r)); |
| } |
| |
| template <typename E> |
| std::enable_if_t<sknonstd::is_bitmask_enum<E>::value, E&> constexpr operator|=(E& l, E r) { |
| return l = l | r; |
| } |
| |
| template <typename E> |
| std::enable_if_t<sknonstd::is_bitmask_enum<E>::value, E> constexpr operator&(E l, E r) { |
| using U = std::underlying_type_t<E>; |
| return static_cast<E>(static_cast<U>(l) & static_cast<U>(r)); |
| } |
| |
| template <typename E> |
| std::enable_if_t<sknonstd::is_bitmask_enum<E>::value, E&> constexpr operator&=(E& l, E r) { |
| return l = l & r; |
| } |
| |
| template <typename E> |
| std::enable_if_t<sknonstd::is_bitmask_enum<E>::value, E> constexpr operator~(E e) { |
| return static_cast<E>(~static_cast<std::underlying_type_t<E>>(e)); |
| } |
| |
| #endif // SkEnumOperators_DEFINED |