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