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- #pragma once
- /*
- * Copyright 2018-present Facebook, Inc.
- *
- * 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.
- */
- #include <folly/experimental/pushmi/o/extension_operators.h>
- #include <folly/experimental/pushmi/o/submit.h>
- #include <folly/experimental/pushmi/receiver.h>
- #include <folly/experimental/pushmi/single_sender.h>
- namespace pushmi {
- namespace operators {
- PUSHMI_INLINE_VAR constexpr struct defer_fn {
- private:
- template <class F>
- struct impl {
- F f_;
- PUSHMI_TEMPLATE(class Data, class Out)
- (requires Receiver<Out>)
- void operator()(Data&, Out out) {
- auto sender = f_();
- ::pushmi::submit(sender, std::move(out));
- }
- };
- public:
- PUSHMI_TEMPLATE(class F)
- (requires Invocable<F&>)
- auto operator()(F f) const {
- struct sender_base : single_sender<> {
- using properties = properties_t<invoke_result_t<F&>>;
- };
- return make_single_sender(sender_base{}, impl<F>{std::move(f)});
- }
- } defer{};
- } // namespace operators
- } // namespace pushmi
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