[ceph.git] / ceph / src / boost / boost / implicit_cast.hpp

// Copyright David Abrahams 2003.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

#ifndef BOOST_IMPLICIT_CAST_DWA200356_HPP
#define BOOST_IMPLICIT_CAST_DWA200356_HPP

#include <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif

namespace boost {

namespace detail {

template<class T> struct icast_identity
{
    typedef T type;
};

} // namespace detail

// implementation originally suggested by C. Green in
// http://lists.boost.org/MailArchives/boost/msg00886.php

// The use of identity creates a non-deduced form, so that the
// explicit template argument must be supplied
template <typename T>
BOOST_CONSTEXPR inline T implicit_cast (typename boost::detail::icast_identity<T>::type x) {
    return x;
}

} // namespace boost


#endif // BOOST_IMPLICIT_CAST_DWA200356_HPP
Commit	Line	Data
7c673cae FG	1	// Copyright David Abrahams 2003.
	2	// Distributed under the Boost Software License, Version 1.0. (See
	3	// accompanying file LICENSE_1_0.txt or copy at
	4	// http://www.boost.org/LICENSE_1_0.txt)
f67539c2 TL	5
	6	#ifndef BOOST_IMPLICIT_CAST_DWA200356_HPP
	7	#define BOOST_IMPLICIT_CAST_DWA200356_HPP
7c673cae	8
1e59de90 TL	9	#include <boost/config.hpp>
	10	#ifdef BOOST_HAS_PRAGMA_ONCE
	11	# pragma once
	12	#endif
	13
7c673cae FG	14	namespace boost {
	15
	16	namespace detail {
	17
	18	template<class T> struct icast_identity
	19	{
	20	typedef T type;
	21	};
	22
	23	} // namespace detail
	24
	25	// implementation originally suggested by C. Green in
	26	// http://lists.boost.org/MailArchives/boost/msg00886.php
	27
	28	// The use of identity creates a non-deduced form, so that the
	29	// explicit template argument must be supplied
	30	template <typename T>
1e59de90	31	BOOST_CONSTEXPR inline T implicit_cast (typename boost::detail::icast_identity<T>::type x) {
7c673cae FG	32	return x;
	33	}
	34
7c673cae FG	35	} // namespace boost
	36
	37
f67539c2	38	#endif // BOOST_IMPLICIT_CAST_DWA200356_HPP