Line data    Source code

       1             : /*
       2             :  * Copyright 2016 Google Inc.
       3             :  *
       4             :  * Use of this source code is governed by a BSD-style license that can be
       5             :  * found in the LICENSE file.
       6             :  */
       7             : #ifndef SkEnumOperators_DEFINED
       8             : #define SkEnumOperators_DEFINED
       9             : 
      10             : #include "SkTLogic.h"
      11             : 
      12             : namespace skstd {
      13             : template <typename T> struct is_bitmask_enum : std::false_type {};
      14             : }
      15             : 
      16           0 : template <typename E> SK_WHEN(skstd::is_bitmask_enum<E>::value, E) operator|(E l, E r) {
      17             :     using U = skstd::underlying_type_t<E>;
      18           0 :     return static_cast<E>(static_cast<U>(l) | static_cast<U>(r));
      19             : }
      20             : 
      21           0 : template <typename E> SK_WHEN(skstd::is_bitmask_enum<E>::value, E&) operator|=(E& l, E r) {
      22           0 :     return l = l | r;
      23             : }
      24             : 
      25           0 : template <typename E> SK_WHEN(skstd::is_bitmask_enum<E>::value, E) operator&(E l, E r) {
      26             :     using U = skstd::underlying_type_t<E>;
      27           0 :     return static_cast<E>(static_cast<U>(l) & static_cast<U>(r));
      28             : }
      29             : 
      30             : template <typename E> SK_WHEN(skstd::is_bitmask_enum<E>::value, E&) operator&=(E& l, E r) {
      31             :     return l = l & r;
      32             : }
      33             : 
      34             : #endif  // SkEnumOperators_DEFINED