is_strand.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_IS_STRAND_HPP)
#define ASYNC_MQTT_IS_STRAND_HPP
 
#include <type_traits>
 
#include <boost/asio/strand.hpp>
#include <boost/asio/io_context.hpp>
 
namespace async_mqtt {
 
namespace as = boost::asio;
 
template <typename T>
struct is_strand_template : std::false_type {};
 
template <typename T>
struct is_strand_template<as::strand<T>> : std::true_type {};
 
template <typename T>
constexpr bool is_strand() {
    return
        is_strand_template<T>::value ||
        std::is_same_v<T, as::io_context::strand>;
}
 
} // namespace async_mqtt
 
#endif // ASYNC_MQTT_IS_STRAND_HPP