protocol_version.hpp

// Copyright Takatoshi Kondo 2022
//
// 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)
 
#if !defined(ASYNC_MQTT_PROTOCOL_VERSION_HPP)
#define ASYNC_MQTT_PROTOCOL_VERSION_HPP
 
#include <cstdint>
#include <ostream>
 
namespace async_mqtt {
 
enum class protocol_version {
    undetermined  = 0, 
    v3_1_1        = 4, 
    v5            = 5, 
};
 
constexpr char const* protocol_version_to_str(protocol_version v) {
    switch(v) {
    case protocol_version::undetermined: return "undetermined";
    case protocol_version::v3_1_1: return "v3_1_1";
    case protocol_version::v5: return "v5";
    default: return "unknown_protocol_version";
    }
}
 
inline
std::ostream& operator<<(std::ostream& os, protocol_version val)
{
    os << protocol_version_to_str(val);
    return os;
}
 
} // namespace async_mqtt
 
#endif // ASYNC_MQTT_PROTOCOL_VERSION_HPP