36 lines
921 B
C++
36 lines
921 B
C++
/*!
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* \file utl/core/crtp.h
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* \brief CRTP idiom support header
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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/core/impl.h>
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/*!
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* \defgroup crtp CRTP idiom support header
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* \ingroup core
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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 \c 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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* \sa utl::virtual_tag
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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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