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