dc976a96ea
- Lots of skstd::foo is now std::foo since C++14. - Get rid of SK_WHEN(cond,T); std::enable_if_t<cond,T> is pithy enough. - Move SkBitmaskEnum.h contents into sknonstd. Change-Id: Ie5dc459405b1ff55e5b3ac57e70df7edd7cf38c0 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/286315 Reviewed-by: Ben Wagner <bungeman@google.com> Commit-Queue: Mike Klein <mtklein@google.com>
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
/*
|
|
* 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
|