/usr/include/caf/skip_message.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_MATCH_HINT_HPP
#define CAF_MATCH_HINT_HPP
#include <ostream>
namespace caf {
/**
* Optional return type for functors used in pattern matching
* expressions. This type is evaluated by the runtime system
* and can be used to intentionally skip messages.
*/
struct skip_message_t {
constexpr skip_message_t() {}
};
/**
* Tells the runtime system to skip a message when used as message
* handler, i.e., causes the runtime to leave the message in
* the mailbox of an actor.
*/
constexpr skip_message_t skip_message() {
return {};
}
// implemented in string_serialization.cpp
std::ostream& operator<<(std::ostream&, skip_message_t);
} // namespace caf
#endif // CAF_MATCH_HINT_HPP
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