diff options
Diffstat (limited to 'include/private')
-rw-r--r-- | include/private/SkBitmaskEnum.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/private/SkBitmaskEnum.h b/include/private/SkBitmaskEnum.h new file mode 100644 index 0000000000..f787d3b04d --- /dev/null +++ b/include/private/SkBitmaskEnum.h @@ -0,0 +1,34 @@ +/* + * 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 "SkTLogic.h" + +namespace skstd { +template <typename T> struct is_bitmask_enum : std::false_type {}; +} + +template <typename E> SK_WHEN(skstd::is_bitmask_enum<E>::value, E) operator|(E l, E r) { + using U = skstd::underlying_type_t<E>; + return static_cast<E>(static_cast<U>(l) | static_cast<U>(r)); +} + +template <typename E> SK_WHEN(skstd::is_bitmask_enum<E>::value, E&) operator|=(E& l, E r) { + return l = l | r; +} + +template <typename E> SK_WHEN(skstd::is_bitmask_enum<E>::value, E) operator&(E l, E r) { + using U = skstd::underlying_type_t<E>; + return static_cast<E>(static_cast<U>(l) & static_cast<U>(r)); +} + +template <typename E> SK_WHEN(skstd::is_bitmask_enum<E>::value, E&) operator&=(E& l, E r) { + return l = l & r; +} + +#endif // SkEnumOperators_DEFINED |