ceph/src/boost/libs/geometry/include/boost/geometry/util/select_coordinate_type.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 2014.
   8 // Modifications copyright (c) 2014 Oracle and/or its affiliates.
   9
  10 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
  11
  12 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
  13 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
  14
  15 // Use, modification and distribution is subject to the Boost Software License,
  16 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  17 // http://www.boost.org/LICENSE_1_0.txt)
  18
  19 #ifndef BOOST_GEOMETRY_UTIL_SELECT_COORDINATE_TYPE_HPP
  20 #define BOOST_GEOMETRY_UTIL_SELECT_COORDINATE_TYPE_HPP
  21
  22
  23 #include <boost/geometry/core/coordinate_type.hpp>
  24 #include <boost/geometry/util/select_most_precise.hpp>
  25
  26
  27 namespace boost { namespace geometry
  28 {
  29
  30
  31 /*!
  32     \brief Meta-function selecting the most precise coordinate type
  33         of two geometries
  34     \ingroup utility
  35  */
  36 template <typename T1, typename T2 = void, typename T3 = void>
  37 struct select_coordinate_type
  38 {
  39     typedef typename select_most_precise
  40         <
  41             typename coordinate_type<T1>::type,
  42             typename coordinate_type<T2>::type,
  43             typename coordinate_type<T3>::type
  44         >::type type;
  45 };
  46
  47 template <typename T1, typename T2>
  48 struct select_coordinate_type<T1, T2, void>
  49 {
  50     typedef typename select_most_precise
  51         <
  52             typename coordinate_type<T1>::type,
  53             typename coordinate_type<T2>::type
  54         >::type type;
  55 };
  56
  57 template <typename T1>
  58 struct select_coordinate_type<T1, void, void>
  59 {
  60     typedef typename select_most_precise
  61         <
  62             typename coordinate_type<T1>::type
  63         >::type type;
  64 };
  65
  66 }} // namespace boost::geometry
  67
  68
  69 #endif // BOOST_GEOMETRY_UTIL_SELECT_COORDINATE_TYPE_HPP