tbx/include/core/crtp.h

/*!
 * \file core/crtp.h
 * \brief
 *      A CRTP idiom helper header
 *
 * \copyright Copyright (C) 2020 Christos Choutouridis <christos@choutouridis.net>
 *
 * <dl class=\"section copyright\"><dt>License</dt><dd>
 * The MIT License (MIT)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 * </dd></dl>
 */

#ifndef TBX_CORE_CRTP_H_
#define TBX_CORE_CRTP_H_

/*!
 * \defgroup crtp   CRTP idiom support header
 *
 */
//!@{
namespace tbx {
   //! CRTP support tag type
   struct crtp_tag { };
   //! virtual support tag type
   struct virtual_tag { };

   //! \def CRTP boilerplate lines
   #define _CRTP_IMPL(T) \
   constexpr T& impl() { return *static_cast<T*>(this); } \
   constexpr const T& impl() const { return *static_cast<const T*>(this); }

}
//!@}



#endif /* TBX_CORE_CRTP_H_ */