/* * Copyright (c) Meta Platforms, Inc. and affiliates. * * 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 #include namespace folly { namespace channels { /** * Merge takes a list of receivers, and returns a new receiver that receives * all updates from all input receivers. If any input receiver closes with * an exception, the exception is forwarded and the channel is closed. If any * input receiver closes without an exception, the channel continues to merge * values from the other input receivers until all input receivers are closed. * * @param inputReceivers: The collection of input receivers to merge. * * @param executor: A SequencedExecutor used to merge input values. * * Example: * * // Example function that returns a list of receivers * std::vector> getReceivers(); * * // Example function that returns an executor * folly::Executor::KeepAlive getExecutor(); * * Receiver mergedReceiver = merge(getReceivers(), getExecutor()); */ template Receiver merge( std::vector inputReceivers, folly::Executor::KeepAlive executor); } // namespace channels } // namespace folly #include