| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SRC_UI_LIB_ESCHER_UTIL_ENUM_COUNT_H_ |
| #define SRC_UI_LIB_ESCHER_UTIL_ENUM_COUNT_H_ |
| |
| #include <cstddef> |
| |
| namespace escher { |
| |
| // Return the number of elements in an enum, which must properly define |
| // kEnumCount: they should start at zero and monotonically increase by 1, |
| // so that kEnumCount is equal to the number of previous values in the enum. |
| template <typename E> |
| constexpr size_t EnumCount() { |
| return static_cast<size_t>(E::kEnumCount); |
| } |
| |
| } // namespace escher |
| |
| #endif // SRC_UI_LIB_ESCHER_UTIL_ENUM_COUNT_H_ |
