47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
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*/
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#pragma once
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#include <rpl/producer.h>
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namespace rpl {
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template <typename Value, typename Error = no_error>
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producer<std::decay_t<Value>, Error> single(Value &&value) {
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using consumer_t = consumer<std::decay_t<Value>, Error>;
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return [value = std::forward<Value>(value)](
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const consumer_t &consumer) mutable {
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consumer.put_next(std::move(value));
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consumer.put_done();
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return lifetime();
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};
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}
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template <typename Error = no_error>
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producer<empty_value, Error> single() {
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return [](const consumer<empty_value, Error> &consumer) {
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consumer.put_next({});
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consumer.put_done();
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};
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}
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} // namespace rpl
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