config.hpp

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// Copyright Takatoshi Kondo 2020
//
// 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(MQTT_CONFIG_HPP)
#define MQTT_CONFIG_HPP
 
#if !defined(MQTT_STD_VARIANT)
 
// Use boost variant
 
// user intentionally defined BOOST_MPL_LIMIT_LIST_SIZE but size is too small
// NOTE: if BOOST_MPL_LIMIT_LIST_SIZE is not defined, the value is evaluate as 0.
#if defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) && BOOST_MPL_LIMIT_LIST_SIZE < 40
 
#error BOOST_MPL_LIMIT_LIST_SIZE need to greator or equal to 40
 
#else  // defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) && BOOST_MPL_LIMIT_LIST_SIZE < 40
 
// user doesn't define BOOST_MPL_LIMIT_LIST_SIZE intentionally
// but the defult value could be defined
 
#undef BOOST_MPL_LIMIT_LIST_SIZE
#define BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
#define BOOST_MPL_LIMIT_LIST_SIZE 40
 
#endif // defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) && BOOST_MPL_LIMIT_LIST_SIZE < 40
 
 
#endif // !defined(MQTT_STD_VARIANT)
 
#endif // MQTT_CONFIG_HPP