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109 lines
3.0 KiB
109 lines
3.0 KiB
// Boost.Geometry (aka GGL, Generic Geometry Library) |
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// Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands. |
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// Copyright (c) 2008-2011 Bruno Lalande, Paris, France. |
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// Copyright (c) 2009-2011 Mateusz Loskot, London, UK. |
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library |
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. |
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// Use, modification and distribution is subject to the Boost Software License, |
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef BOOST_GEOMETRY_STRATEGIES_CONCEPTS_SIMPLIFY_CONCEPT_HPP |
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#define BOOST_GEOMETRY_STRATEGIES_CONCEPTS_SIMPLIFY_CONCEPT_HPP |
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#include <vector> |
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#include <iterator> |
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#include <boost/concept_check.hpp> |
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#include <boost/geometry/strategies/concepts/distance_concept.hpp> |
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namespace boost { namespace geometry { namespace concept |
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{ |
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/*! |
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\brief Checks strategy for simplify |
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\ingroup simplify |
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*/ |
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template <typename Strategy> |
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struct SimplifyStrategy |
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{ |
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#ifndef DOXYGEN_NO_CONCEPT_MEMBERS |
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private : |
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// 1) must define distance_strategy_type, |
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// defining point-segment distance strategy (to be checked) |
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typedef typename Strategy::distance_strategy_type ds_type; |
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struct checker |
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{ |
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template <typename ApplyMethod> |
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static void apply(ApplyMethod const&) |
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{ |
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namespace ft = boost::function_types; |
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typedef typename ft::parameter_types |
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< |
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ApplyMethod |
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>::type parameter_types; |
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typedef typename boost::mpl::if_ |
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< |
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ft::is_member_function_pointer<ApplyMethod>, |
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boost::mpl::int_<1>, |
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boost::mpl::int_<0> |
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>::type base_index; |
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// 1: inspect and define both arguments of apply |
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typedef typename boost::remove_const |
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< |
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typename boost::remove_reference |
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< |
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typename boost::mpl::at |
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< |
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parameter_types, |
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base_index |
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>::type |
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>::type |
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>::type point_type; |
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BOOST_CONCEPT_ASSERT |
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( |
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(concept::PointSegmentDistanceStrategy<ds_type>) |
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); |
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Strategy *str; |
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std::vector<point_type> const* v1; |
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std::vector<point_type> * v2; |
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// 2) must implement method apply with arguments |
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// - Range |
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// - OutputIterator |
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// - floating point value |
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str->apply(*v1, std::back_inserter(*v2), 1.0); |
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boost::ignore_unused_variable_warning(str); |
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} |
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}; |
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public : |
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BOOST_CONCEPT_USAGE(SimplifyStrategy) |
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{ |
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checker::apply(&ds_type::apply); |
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} |
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#endif |
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}; |
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}}} // namespace boost::geometry::concept |
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#endif // BOOST_GEOMETRY_STRATEGIES_CONCEPTS_SIMPLIFY_CONCEPT_HPP
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