// Copyright 2021 The Chromium 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 BASE_CONTAINERS_CXX20_ERASE_VECTOR_H_ #define BASE_CONTAINERS_CXX20_ERASE_VECTOR_H_ #include #include #include namespace base { // Erase/EraseIf are based on C++20's uniform container erasure API: // - https://eel.is/c++draft/libraryindex#:erase // - https://eel.is/c++draft/libraryindex#:erase_if // They provide a generic way to erase elements from a container. // The functions here implement these for the standard containers until those // functions are available in the C++ standard. // Note: there is no std::erase for standard associative containers so we don't // have it either. template size_t Erase(std::vector& container, const Value& value) { auto it = std::remove(container.begin(), container.end(), value); size_t removed = static_cast(std::distance(it, container.end())); container.erase(it, container.end()); return removed; } template size_t EraseIf(std::vector& container, Predicate pred) { auto it = std::remove_if(container.begin(), container.end(), pred); size_t removed = static_cast(std::distance(it, container.end())); container.erase(it, container.end()); return removed; } } // namespace base #endif // BASE_CONTAINERS_CXX20_ERASE_VECTOR_H_