ceph/src/boost/boost/geometry/algorithms/detail/throw_on_empty_input.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
   4 // Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
   5 // Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
   6 // Copyright (c) 2017 Adam Wulkiewicz, Lodz, Poland.
   7
   8 // This file was modified by Oracle on 2015.
   9 // Modifications copyright (c) 2015, Oracle and/or its affiliates.
  10
  11 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
  12
  13 // Use, modification and distribution is subject to the Boost Software License,
  14 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  15 // http://www.boost.org/LICENSE_1_0.txt)
  16
  17 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_THROW_ON_EMPTY_INPUT_HPP
  18 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_THROW_ON_EMPTY_INPUT_HPP
  19
  20
  21 #include <boost/geometry/core/exception.hpp>
  22 #include <boost/geometry/algorithms/is_empty.hpp>
  23
  24 #include <boost/throw_exception.hpp>
  25
  26
  27 // BSG 2012-02-06: we use this currently only for distance.
  28 // For other scalar results area,length,perimeter it is commented on purpose.
  29 // Reason is that for distance there is no other choice. distance of two
  30 // empty geometries (or one empty) should NOT return any value.
  31 // But for area it is no problem to be 0.
  32 // Suppose: area(intersection(a,b)). We (probably) don't want a throw there...
  33
  34 // So decided that at least for Boost 1.49 this is commented for
  35 // scalar results, except distance.
  36
  37 #if defined(BOOST_GEOMETRY_EMPTY_INPUT_NO_THROW)
  38 #include <boost/core/ignore_unused.hpp>
  39 #endif
  40
  41 namespace boost { namespace geometry
  42 {
  43
  44 #ifndef DOXYGEN_NO_DETAIL
  45 namespace detail
  46 {
  47
  48 template <typename Geometry>
  49 inline void throw_on_empty_input(Geometry const& geometry)
  50 {
  51 #if ! defined(BOOST_GEOMETRY_EMPTY_INPUT_NO_THROW)
  52     if (geometry::is_empty(geometry))
  53     {
  54         BOOST_THROW_EXCEPTION(empty_input_exception());
  55     }
  56 #else
  57     boost::ignore_unused(geometry);
  58 #endif
  59 }
  60
  61 } // namespace detail
  62 #endif // DOXYGEN_NO_DETAIL
  63
  64
  65 }} // namespace boost::geometry
  66
  67
  68 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_THROW_ON_EMPTY_INPUT_HPP
  69