ceph/src/boost/boost/geometry/util/promote_floating_point.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
   4 // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
   5 // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
   6
   7 // This file was modified by Oracle on 2020.
   8 // Modifications copyright (c) 2020 Oracle and/or its affiliates.
   9 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
  10
  11 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
  12 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
  13
  14 // Use, modification and distribution is subject to the Boost Software License,
  15 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  16 // http://www.boost.org/LICENSE_1_0.txt)
  17
  18 #ifndef BOOST_GEOMETRY_UTIL_PROMOTE_FLOATING_POINT_HPP
  19 #define BOOST_GEOMETRY_UTIL_PROMOTE_FLOATING_POINT_HPP
  20
  21
  22 #include <type_traits>
  23
  24
  25 namespace boost { namespace geometry
  26 {
  27
  28
  29 /*!
  30     \brief Meta-function converting, if necessary, to "a floating point" type
  31     \details
  32         - if input type is integer, type is double
  33         - else type is input type
  34     \ingroup utility
  35  */
  36
  37 template <typename T, typename PromoteIntegerTo = double>
  38 struct promote_floating_point
  39 {
  40     typedef std::conditional_t
  41         <
  42             std::is_integral<T>::value,
  43             PromoteIntegerTo,
  44             T
  45         > type;
  46 };
  47
  48
  49 }} // namespace boost::geometry
  50
  51
  52 #endif // BOOST_GEOMETRY_UTIL_PROMOTE_FLOATING_POINT_HPP