forked from boostorg/mpl
82 lines
1.8 KiB
C++
82 lines
1.8 KiB
C++
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#ifndef BOOST_MPL_NUMERIC_CAST_HPP_INCLUDED
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#define BOOST_MPL_NUMERIC_CAST_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2003-2004
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//
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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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// See http://www.boost.org/libs/mpl for documentation.
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// $Source$
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// $Date$
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// $Revision$
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#include <boost/mpl/apply_wrap.hpp>
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#include <boost/mpl/aux_/config/msvc.hpp>
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#include <boost/mpl/aux_/config/workaround.hpp>
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// agurt 21/sep/04: portability macro for the sake of MSVC 6.x-7.0;
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// resolves conflicts with 'boost::numeric_cast' function template.
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// use it in your own code _only_ if you care about compatibility with
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// these outdated compilers!
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#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
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# define BOOST_MPL_AUX_NUMERIC_CAST numeric_cast_
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#else
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# define BOOST_MPL_AUX_NUMERIC_CAST numeric_cast
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#endif
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namespace boost { namespace mpl {
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// no default implementation; the definition is needed to make MSVC happy
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template< typename SourceTag, typename TargetTag > struct BOOST_MPL_AUX_NUMERIC_CAST
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{
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template< typename N > struct apply;
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};
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namespace aux {
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template<
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typename F
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, typename Tag1
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, typename Tag2
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>
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struct cast1st_impl
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{
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template< typename N1, typename N2 > struct apply
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: apply_wrap2<
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F
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, typename apply_wrap1< BOOST_MPL_AUX_NUMERIC_CAST<Tag1,Tag2>,N1 >::type
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, N2
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>
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{
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};
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};
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template<
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typename F
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, typename Tag1
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, typename Tag2
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>
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struct cast2nd_impl
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{
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template< typename N1, typename N2 > struct apply
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: apply_wrap2<
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F
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, N1
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, typename apply_wrap1< BOOST_MPL_AUX_NUMERIC_CAST<Tag2,Tag1>,N2 >::type
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>
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{
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};
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};
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} // namespace aux
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}}
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#endif // BOOST_MPL_NUMERIC_CAST_HPP_INCLUDED
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