Added boost header

test/external/boost/geometry/strategies/concepts/area_concept.hpp

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+// Boost.Geometry (aka GGL, Generic Geometry Library)
+
+// Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands.
+// Copyright (c) 2008-2011 Bruno Lalande, Paris, France.
+// Copyright (c) 2009-2011 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_AREA_CONCEPT_HPP
+#define BOOST_GEOMETRY_STRATEGIES_CONCEPTS_AREA_CONCEPT_HPP
+
+
+#include <boost/concept_check.hpp>
+
+
+namespace boost { namespace geometry { namespace concept
+{
+
+
+/*!
+    \brief Checks strategy for area
+    \ingroup area
+*/
+template <typename Strategy>
+class AreaStrategy
+{
+#ifndef DOXYGEN_NO_CONCEPT_MEMBERS
+
+    // 1) must define state_type,
+    typedef typename Strategy::state_type state_type;
+
+    // 2) must define return_type,
+    typedef typename Strategy::return_type return_type;
+
+    // 3) must define point_type, of polygon (segments)
+    typedef typename Strategy::segment_point_type spoint_type;
+
+    struct check_methods
+    {
+        static void apply()
+        {
+            Strategy const* str;
+            state_type *st;
+
+            // 4) must implement a method apply with the following signature
+            spoint_type const* sp;
+            str->apply(*sp, *sp, *st);
+
+            // 5) must implement a static method result with the following signature
+            return_type r = str->result(*st);
+
+            boost::ignore_unused_variable_warning(r);
+            boost::ignore_unused_variable_warning(str);
+        }
+    };
+
+public :
+    BOOST_CONCEPT_USAGE(AreaStrategy)
+    {
+        check_methods::apply();
+    }
+
+#endif
+};
+
+
+}}} // namespace boost::geometry::concept
+
+
+#endif // BOOST_GEOMETRY_STRATEGIES_CONCEPTS_AREA_CONCEPT_HPP