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