// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2015 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 2015.
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// Modifications copyright (c) 2015, Oracle and/or its affiliates.
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// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
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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_ALGORITHMS_DETAIL_THROW_ON_EMPTY_INPUT_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_THROW_ON_EMPTY_INPUT_HPP
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#include <boost/geometry/core/exception.hpp>
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#include <boost/geometry/algorithms/is_empty.hpp>
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#include <boost/throw_exception.hpp>
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// BSG 2012-02-06: we use this currently only for distance.
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// For other scalar results area,length,perimeter it is commented on purpose.
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// Reason is that for distance there is no other choice. distance of two
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// empty geometries (or one empty) should NOT return any value.
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// But for area it is no problem to be 0.
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// Suppose: area(intersection(a,b)). We (probably) don't want a throw there...
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// So decided that at least for Boost 1.49 this is commented for
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// scalar results, except distance.
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#if defined(BOOST_GEOMETRY_EMPTY_INPUT_NO_THROW)
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#include <boost/core/ignore_unused.hpp>
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#endif
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail
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{
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template <typename Geometry>
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inline void throw_on_empty_input(Geometry const& geometry)
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{
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#if ! defined(BOOST_GEOMETRY_EMPTY_INPUT_NO_THROW)
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if (geometry::is_empty(geometry))
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{
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BOOST_THROW_EXCEPTION(empty_input_exception());
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}
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#else
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boost::ignore_unused(geometry);
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#endif
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}
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} // namespace detail
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#endif // DOXYGEN_NO_DETAIL
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_THROW_ON_EMPTY_INPUT_HPP
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