65 lines
1.4 KiB
C++
65 lines
1.4 KiB
C++
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/*
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* Copyright Andrey Semashev 2007 - 2015.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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/*!
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* \file copy_cv.hpp
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* \author Andrey Semashev
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* \date 16.03.2014
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*
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* The header defines \c copy_cv type trait which copies const/volatile qualifiers from one type to another
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*/
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#ifndef BOOST_LOG_DETAIL_COPY_CV_HPP_INCLUDED_
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#define BOOST_LOG_DETAIL_COPY_CV_HPP_INCLUDED_
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#include <boost/log/detail/config.hpp>
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#include <boost/log/detail/header.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace aux {
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//! The type trait copies top level const/volatile qualifiers from \c FromT to \c ToT
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template< typename FromT, typename ToT >
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struct copy_cv
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{
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typedef ToT type;
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};
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template< typename FromT, typename ToT >
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struct copy_cv< const FromT, ToT >
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{
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typedef const ToT type;
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};
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template< typename FromT, typename ToT >
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struct copy_cv< volatile FromT, ToT >
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{
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typedef volatile ToT type;
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};
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template< typename FromT, typename ToT >
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struct copy_cv< const volatile FromT, ToT >
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{
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typedef const volatile ToT type;
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};
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} // namespace aux
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#include <boost/log/detail/footer.hpp>
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#endif // BOOST_LOG_DETAIL_COPY_CV_HPP_INCLUDED_
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