/*!
* \file /utl/impl/crtp.h
* \brief CRTP idiom support header
*
* Copyright (C) 2018 Christos Choutouridis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see .
*
*/
#ifndef __utl_impl_crtp_h__
#define __utl_impl_crtp_h__
#include
/*!
* \defgroup crtp CRTP idiom support header
* \ingroup impl
*
* utl supports both CRTP idiom and dynamic polymorphism. By default
* CRTP is the preferred way. If the user need virtuals then instead of
* CRTP type, the \ref virtual_tag can passed to base class. The rest
* will handled by utl automatically.
*/
//!@{
namespace utl {
//! 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(this); } \
constexpr const T& impl() const { return *static_cast(this); }
}
//!@}
#endif /* __utl_impl_crtp_h__ */