80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
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// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
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// Copyright (c) 2017 Adam Wulkiewicz, Lodz, Poland.
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// This file was modified by Oracle on 2018.
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// Modifications copyright (c) 2018 Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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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_AREA_CONCEPT_HPP
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#define BOOST_GEOMETRY_STRATEGIES_CONCEPTS_AREA_CONCEPT_HPP
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#include <boost/concept_check.hpp>
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#include <boost/core/ignore_unused.hpp>
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#include <boost/geometry/geometries/point.hpp>
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namespace boost { namespace geometry { namespace concepts
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{
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/*!
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\brief Checks strategy for area
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\ingroup area
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*/
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template <typename Geometry, typename Strategy>
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class AreaStrategy
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{
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#ifndef DOXYGEN_NO_CONCEPT_MEMBERS
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// 1) must define state template,
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typedef typename Strategy::template state<Geometry> state_type;
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// 2) must define result_type template,
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typedef typename Strategy::template result_type<Geometry>::type return_type;
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struct check_methods
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{
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static void apply()
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{
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Strategy const* str = 0;
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state_type *st = 0;
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// 3) must implement a method apply with the following signature
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typename geometry::point_type<Geometry>::type const* sp = 0;
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str->apply(*sp, *sp, *st);
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// 4) must implement a static method result with the following signature
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return_type r = str->result(*st);
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boost::ignore_unused(r, str);
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}
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};
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public :
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BOOST_CONCEPT_USAGE(AreaStrategy)
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{
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check_methods::apply();
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}
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#endif
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};
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}}} // namespace boost::geometry::concepts
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#endif // BOOST_GEOMETRY_STRATEGIES_CONCEPTS_AREA_CONCEPT_HPP
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