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tdlib-fork/tdutils/td/utils/optional.h
levlam 5cbda834bd Update copyright year.
GitOrigin-RevId: 1369d3af1195221f6ddb9462d5f8b74fb5fef20f
2018-01-02 16:45:09 +03:00

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685 B
C++

//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/utils/Status.h"
#include <utility>
namespace td {
template <class T>
class optional {
public:
optional() = default;
template <class T1>
optional(T1 &&t) : impl_(std::forward<T1>(t)) {
}
explicit operator bool() {
return impl_.is_ok();
}
T &value() {
return impl_.ok_ref();
}
T &operator*() {
return value();
}
private:
Result<T> impl_;
};
} // namespace td