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50 lines
1.3 KiB
50 lines
1.3 KiB
// Boost.Geometry (aka GGL, Generic Geometry Library) |
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// Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands. |
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// Copyright (c) 2008-2011 Bruno Lalande, Paris, France. |
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// Copyright (c) 2009-2011 Mateusz Loskot, London, UK. |
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library |
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. |
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// Use, modification and distribution is subject to the Boost Software License, |
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// Version 1.0. (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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#ifndef BOOST_GEOMETRY_UTIL_PROMOTE_FLOATING_POINT_HPP |
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#define BOOST_GEOMETRY_UTIL_PROMOTE_FLOATING_POINT_HPP |
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#include <boost/mpl/if.hpp> |
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#include <boost/type_traits.hpp> |
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namespace boost { namespace geometry |
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{ |
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/*! |
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\brief Meta-function converting, if necessary, to "a floating point" type |
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\details |
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- if input type is integer, type is double |
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- else type is input type |
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\ingroup utility |
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*/ |
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template <typename T, typename PromoteIntegerTo = double> |
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struct promote_floating_point |
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{ |
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typedef typename |
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boost::mpl::if_ |
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< |
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boost::is_integral<T>, |
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PromoteIntegerTo, |
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T |
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>::type type; |
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}; |
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}} // namespace boost::geometry |
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#endif // BOOST_GEOMETRY_UTIL_PROMOTE_FLOATING_POINT_HPP
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