文件操作 - promote_floating_point.hpp

文件: /usr/include/boost/geometry/util/promote_floating_point.hpp

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// Boost.Geometry (aka GGL, Generic Geometry Library)

// 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

文件操作 - promote_floating_point.hpp

文件: /usr/include/boost/geometry/util/promote_floating_point.hpp

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