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Viewing changes to libs/boost-lib/boost/type_traits/floating_point_promotion.hpp

  • Committer: Bazaar Package Importer
  • Author(s): Alessio Treglia
  • Date: 2010-11-04 11:46:25 UTC
  • mto: This revision was merged to the branch mainline in revision 8.
  • Revision ID: james.westby@ubuntu.com-20101104114625-8xfdhvhpsm51i0nu
Tags: upstream-0.8.0
Import upstream version 0.8.0

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libs/boost-lib/boost/type_traits/floating_point_promotion.hpp
 
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// Copyright 2005 Alexander Nasonov.
 
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// Distributed under the Boost Software License, Version 1.0. (See
 
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// 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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#ifndef FILE_boost_type_traits_floating_point_promotion_hpp_INCLUDED
 
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#define FILE_boost_type_traits_floating_point_promotion_hpp_INCLUDED
 
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#include <boost/config.hpp>
 
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#ifdef BOOST_NO_CV_SPECIALIZATIONS
 
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#include <boost/mpl/at.hpp>
 
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#include <boost/mpl/int.hpp>
 
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#include <boost/mpl/multiplies.hpp>
 
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#include <boost/mpl/plus.hpp>
 
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#include <boost/mpl/vector.hpp>
 
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#include <boost/type_traits/is_same.hpp>
 
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#endif
 
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// Should be the last #include
 
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#include <boost/type_traits/detail/type_trait_def.hpp>
 
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namespace boost {
 
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namespace type_traits { namespace detail {
 
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#ifndef BOOST_NO_CV_SPECIALIZATIONS
 
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template<class T>
 
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struct floating_point_promotion
 
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{
 
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    typedef T type;
 
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};
 
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template<>
 
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struct floating_point_promotion<float>
 
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{
 
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    typedef double type;
 
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};
 
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template<>
 
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struct floating_point_promotion<float const>
 
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{
 
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    typedef double const type;
 
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};
 
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template<>
 
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struct floating_point_promotion<float volatile>
 
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{
 
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    typedef double volatile type;
 
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};
 
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template<>
 
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struct floating_point_promotion<float const volatile>
 
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{
 
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    typedef double const volatile type;
 
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};
 
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#else
 
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template<class T>
 
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struct floating_point_promotion
 
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  : mpl::at<
 
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        mpl::vector< T, double, double const, double volatile,
 
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                     double const volatile >
 
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      , mpl::plus<
 
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            is_same<T, float>
 
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          , mpl::multiplies< is_same<T, float const>         , mpl::int_<2> >
 
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          , mpl::multiplies< is_same<T, float volatile>      , mpl::int_<3> >
 
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          , mpl::multiplies< is_same<T, float const volatile>, mpl::int_<4> >
 
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          >
 
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      >
 
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{
 
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};
 
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#endif
 
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} }
 
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BOOST_TT_AUX_TYPE_TRAIT_DEF1(
 
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      floating_point_promotion
 
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    , T
 
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    , BOOST_DEDUCED_TYPENAME
 
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        boost::type_traits::detail::floating_point_promotion<T>::type
 
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    )
 
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}
 
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#include <boost/type_traits/detail/type_trait_undef.hpp>
 
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#endif // #ifndef FILE_boost_type_traits_floating_point_promotion_hpp_INCLUDED
 
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