qos.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_PACKET_QOS_HPP)
#define ASYNC_MQTT_PACKET_QOS_HPP
 
#include <cstdint>
#include <ostream>
 
namespace async_mqtt {
 
enum class qos : std::uint8_t
{
    at_most_once = 0b00000000,  
    at_least_once = 0b00000001, 
    exactly_once = 0b00000010,  
};
 
constexpr char const* qos_to_str(qos v) {
    switch(v) {
    case qos::at_most_once:  return "at_most_once";
    case qos::at_least_once: return "at_least_once";
    case qos::exactly_once:  return "exactly_once";
    default:                 return "invalid_qos";
    }
}
 
inline
std::ostream& operator<<(std::ostream& o, qos v)
{
    o << qos_to_str(v);
    return o;
}
 
} // namespace async_mqtt
 
#endif // ASYNC_MQTT_PACKET_QOS_HPP