/usr/include/caf/unit.hpp is in libcaf-dev 0.13.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* ____ _ _____ *
* / ___| / \ | ___| C++ *
* | | / _ \ | |_ Actor *
* | |___ / ___ \| _| Framework *
* \____/_/ \_|_| *
* *
* Copyright (C) 2011 - 2015 *
* Dominik Charousset <dominik.charousset (at) haw-hamburg.de> *
* *
* Distributed under the terms and conditions of the BSD 3-Clause License or *
* (at your option) under the terms and conditions of the Boost Software *
* License 1.0. See accompanying files LICENSE and LICENSE_ALTERNATIVE. *
* *
* If you did not receive a copy of the license files, see *
* http://opensource.org/licenses/BSD-3-Clause and *
* http://www.boost.org/LICENSE_1_0.txt. *
******************************************************************************/
#ifndef CAF_UNIT_HPP
#define CAF_UNIT_HPP
namespace caf {
struct unit_t {
constexpr unit_t() {
// nop
}
constexpr unit_t(const unit_t&) {
// nop
}
template <class T>
explicit constexpr unit_t(T&&) {
// nop
}
unit_t& operator=(const unit_t&) = default;
};
static constexpr unit_t unit = unit_t{};
template <class T>
struct lift_void {
using type = T;
};
template <>
struct lift_void<void> {
using type = unit_t;
};
template <class T>
struct unlift_void {
using type = T;
};
template <>
struct unlift_void<unit_t> {
using type = void;
};
} // namespace caf
#endif // CAF_UNIT_HPP
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