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- // Boost.Geometry (aka GGL, Generic Geometry Library)
- // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
- // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
- // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
- // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
- // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
- // Use, modification and distribution is subject to 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_GEOMETRY_UTIL_PROMOTE_FLOATING_POINT_HPP
- #define BOOST_GEOMETRY_UTIL_PROMOTE_FLOATING_POINT_HPP
- #include <boost/mpl/if.hpp>
- #include <boost/type_traits/is_integral.hpp>
- namespace boost { namespace geometry
- {
- /*!
- \brief Meta-function converting, if necessary, to "a floating point" type
- \details
- - if input type is integer, type is double
- - else type is input type
- \ingroup utility
- */
- template <typename T, typename PromoteIntegerTo = double>
- struct promote_floating_point
- {
- typedef typename
- boost::mpl::if_
- <
- boost::is_integral<T>,
- PromoteIntegerTo,
- T
- >::type type;
- };
- }} // namespace boost::geometry
- #endif // BOOST_GEOMETRY_UTIL_PROMOTE_FLOATING_POINT_HPP
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