1 /* 2 * Copyright 2022 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 namespace android::ftl::details { 20 21 template <typename Self, template <typename> class> 22 class Mixin { 23 protected: self()24 constexpr Self& self() { return *static_cast<Self*>(this); } self()25 constexpr const Self& self() const { return *static_cast<const Self*>(this); } 26 mut()27 constexpr auto& mut() { return self().value_; } 28 }; 29 30 } // namespace android::ftl::details 31