// 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. // Copyright (c) 2017 Adam Wulkiewicz, Lodz, Poland. // This file was modified by Oracle on 2018. // Modifications copyright (c) 2018 Oracle and/or its affiliates. // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle // 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_AREA_CONCEPT_HPP #define BOOST_GEOMETRY_STRATEGIES_CONCEPTS_AREA_CONCEPT_HPP #include #include #include namespace boost { namespace geometry { namespace concepts { /*! \brief Checks strategy for area \ingroup area */ template class AreaStrategy { #ifndef DOXYGEN_NO_CONCEPT_MEMBERS // 1) must define state template, typedef typename Strategy::template state state_type; // 2) must define result_type template, typedef typename Strategy::template result_type::type return_type; struct check_methods { static void apply() { Strategy const* str = 0; state_type *st = 0; // 3) must implement a method apply with the following signature typename geometry::point_type::type const* sp = 0; str->apply(*sp, *sp, *st); // 4) must implement a static method result with the following signature return_type r = str->result(*st); boost::ignore_unused(r, str); } }; public : BOOST_CONCEPT_USAGE(AreaStrategy) { check_methods::apply(); } #endif }; }}} // namespace boost::geometry::concepts #endif // BOOST_GEOMETRY_STRATEGIES_CONCEPTS_AREA_CONCEPT_HPP