/usr/include/caf/either.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_EITHER_HPP
#define CAF_EITHER_HPP
#include <tuple>
#include <string>
#include <type_traits>
#include "caf/message.hpp"
#include "caf/replies_to.hpp"
#include "caf/type_name_access.hpp"
#include "caf/illegal_message_element.hpp"
#include "caf/detail/type_list.hpp"
namespace caf {
/** @cond PRIVATE */
std::string either_or_else_type_name(size_t lefts_size,
const std::string* lefts,
size_t rights_size,
const std::string* rights);
template <class L, class R>
struct either_or_t;
template <class... Ls, class... Rs>
struct either_or_t<detail::type_list<Ls...>,
detail::type_list<Rs...>> : illegal_message_element {
static_assert(!std::is_same<detail::type_list<Ls...>,
detail::type_list<Rs...>>::value,
"template parameter packs must differ");
either_or_t(Ls... ls) : value(make_message(std::move(ls)...)) {
// nop
}
either_or_t(Rs... rs) : value(make_message(std::move(rs)...)) {
// nop
}
using opt1_type = std::tuple<Ls...>;
using opt2_type = std::tuple<Rs...>;
message value;
static std::string static_type_name() {
std::string lefts[] = {type_name_access<Ls>::get()...};
std::string rights[] = {type_name_access<Rs>::get()...};
return either_or_else_type_name(sizeof...(Ls), lefts,
sizeof...(Rs), rights);
}
};
/** @endcond */
template <class... Ts>
struct either {
template <class... Us>
using or_else = either_or_t<detail::type_list<Ts...>,
detail::type_list<Us...>>;
};
} // namespace caf
#endif // CAF_EITHER_HPP
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