ceph/src/boost/libs/geometry/test/views/reversible_view.cpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2 // Unit Test
   3
   4 // Copyright (c) 2010-2012 Barend Gehrels, Amsterdam, the Netherlands.
   5
   6 // Use, modification and distribution is subject to the Boost Software License,
   7 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   8 // http://www.boost.org/LICENSE_1_0.txt)
   9
  10 #include <algorithm>
  11 #include <iterator>
  12 #include <sstream>
  13 #include <string>
  14
  15 #include <geometry_test_common.hpp>
  16
  17 #include <boost/geometry/views/reversible_view.hpp>
  18
  19 #include <boost/geometry/io/wkt/wkt.hpp>
  20 #include <boost/geometry/io/dsv/write.hpp>
  21 #include <boost/geometry/geometries/geometries.hpp>
  22 #include <boost/geometry/geometries/point_xy.hpp>
  23 #include <boost/geometry/geometries/adapted/boost_tuple.hpp>
  24
  25 BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian);
  26
  27
  28 template <bg::iterate_direction Direction, typename Range>
  29 void test_forward_or_reverse(Range const& range, std::string const& expected)
  30 {
  31     typedef typename bg::reversible_view
  32         <
  33             Range const,
  34             Direction
  35         >::type view_type;
  36
  37     view_type view(range);
  38
  39     bool first = true;
  40     std::ostringstream out;
  41     for (typename boost::range_iterator<view_type const>::type
  42         it = boost::begin(view);
  43         it != boost::end(view);
  44         ++it, first = false)
  45     {
  46         out << (first ? "" : " ") << bg::dsv(*it);
  47     }
  48     BOOST_CHECK_EQUAL(out.str(), expected);
  49 }
  50
  51
  52
  53 template <typename Geometry>
  54 void test_geometry(std::string const& wkt,
  55             std::string const& expected_forward, std::string const& expected_reverse)
  56 {
  57     Geometry geo;
  58     bg::read_wkt(wkt, geo);
  59
  60     test_forward_or_reverse<bg::iterate_forward>(geo, expected_forward);
  61     test_forward_or_reverse<bg::iterate_reverse>(geo, expected_reverse);
  62 }
  63
  64 template <typename P>
  65 void test_all()
  66 {
  67     test_geometry<bg::model::linestring<P> >(
  68             "linestring(1 1,2 2,3 3)",
  69             "(1, 1) (2, 2) (3, 3)",
  70             "(3, 3) (2, 2) (1, 1)");
  71 }
  72
  73
  74 int test_main(int, char* [])
  75 {
  76     test_all<bg::model::d2::point_xy<double> >();
  77     test_all<bg::model::point<int, 2, bg::cs::cartesian> >();
  78     test_all<boost::tuple<double, double> >();
  79
  80     return 0;
  81 }