Chris@16: // Boost.Geometry (aka GGL, Generic Geometry Library)
Chris@16: 
Chris@16: // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
Chris@16: // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
Chris@16: // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
Chris@16: 
Chris@16: // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
Chris@16: // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
Chris@16: 
Chris@16: // Use, modification and distribution is subject to the Boost Software License,
Chris@16: // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_GEOMETRY_STRATEGIES_CONCEPTS_SIMPLIFY_CONCEPT_HPP
Chris@16: #define BOOST_GEOMETRY_STRATEGIES_CONCEPTS_SIMPLIFY_CONCEPT_HPP
Chris@16: 
Chris@16: #include <vector>
Chris@16: #include <iterator>
Chris@16: 
Chris@16: #include <boost/concept_check.hpp>
Chris@101: #include <boost/core/ignore_unused.hpp>
Chris@16: 
Chris@16: #include <boost/geometry/geometries/point.hpp>
Chris@16: #include <boost/geometry/strategies/concepts/distance_concept.hpp>
Chris@16: 
Chris@16: 
Chris@16: namespace boost { namespace geometry { namespace concept
Chris@16: {
Chris@16: 
Chris@16: 
Chris@16: /*!
Chris@16:     \brief Checks strategy for simplify
Chris@16:     \ingroup simplify
Chris@16: */
Chris@16: template <typename Strategy, typename Point>
Chris@16: struct SimplifyStrategy
Chris@16: {
Chris@16: #ifndef DOXYGEN_NO_CONCEPT_MEMBERS
Chris@16: private :
Chris@16: 
Chris@16:     // 1) must define distance_strategy_type,
Chris@16:     //    defining point-segment distance strategy (to be checked)
Chris@16:     typedef typename Strategy::distance_strategy_type ds_type;
Chris@16: 
Chris@16: 
Chris@16:     struct checker
Chris@16:     {
Chris@16:         template <typename ApplyMethod>
Chris@16:         static void apply(ApplyMethod)
Chris@16:         {
Chris@16:             namespace ft = boost::function_types;
Chris@16:             typedef typename ft::parameter_types
Chris@16:                 <
Chris@16:                     ApplyMethod
Chris@16:                 >::type parameter_types;
Chris@16: 
Chris@16:             typedef typename boost::mpl::if_
Chris@16:                 <
Chris@16:                     ft::is_member_function_pointer<ApplyMethod>,
Chris@16:                     boost::mpl::int_<1>,
Chris@16:                     boost::mpl::int_<0>
Chris@16:                 >::type base_index;
Chris@16: 
Chris@16:             BOOST_CONCEPT_ASSERT
Chris@16:                 (
Chris@16:                     (concept::PointSegmentDistanceStrategy<ds_type, Point, Point>)
Chris@16:                 );
Chris@16: 
Chris@16:             Strategy *str = 0;
Chris@16:             std::vector<Point> const* v1 = 0;
Chris@16:             std::vector<Point> * v2 = 0;
Chris@16: 
Chris@16:             // 2) must implement method apply with arguments
Chris@16:             //    - Range
Chris@16:             //    - OutputIterator
Chris@16:             //    - floating point value
Chris@16:             str->apply(*v1, std::back_inserter(*v2), 1.0);
Chris@16: 
Chris@101:             boost::ignore_unused<parameter_types, base_index>();
Chris@101:             boost::ignore_unused(str);
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16: public :
Chris@16:     BOOST_CONCEPT_USAGE(SimplifyStrategy)
Chris@16:     {
Chris@16:         checker::apply(&ds_type::template apply<Point, Point>);
Chris@16:     }
Chris@16: #endif
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: }}} // namespace boost::geometry::concept
Chris@16: 
Chris@16: #endif // BOOST_GEOMETRY_STRATEGIES_CONCEPTS_SIMPLIFY_CONCEPT_HPP