| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #pragma once |
| |
| #include <iterator> |
| #include <type_traits> |
| |
| namespace android { |
| |
| namespace internal { |
| |
| // Never instantiated. Used as a placeholder for template variables. |
| template <typename T> |
| struct invalid_type; |
| |
| // AIDL generates specializations of this for enums. |
| template <typename EnumType, typename = std::enable_if_t<std::is_enum<EnumType>::value>> |
| constexpr invalid_type<EnumType> enum_values; |
| } // namespace internal |
| |
| // Usage: for (const auto v : enum_range<EnumType>() ) { ... } |
| template <typename EnumType, typename = std::enable_if_t<std::is_enum<EnumType>::value>> |
| struct enum_range { |
| constexpr auto begin() const { return std::begin(internal::enum_values<EnumType>); } |
| constexpr auto end() const { return std::end(internal::enum_values<EnumType>); } |
| }; |
| |
| } // namespace android |
