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 ```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 ``` ``````// Boost.Geometry (aka GGL, Generic Geometry Library) // Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands. // Copyright (c) 2008-2015 Bruno Lalande, Paris, France. // Copyright (c) 2009-2015 Mateusz Loskot, London, UK. // This file was modified by Oracle on 2015. // Modifications copyright (c) 2015, Oracle and/or its affiliates. // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle // 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_ALGORITHMS_DETAIL_THROW_ON_EMPTY_INPUT_HPP #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_THROW_ON_EMPTY_INPUT_HPP #include #include // BSG 2012-02-06: we use this currently only for distance. // For other scalar results area,length,perimeter it is commented on purpose. // Reason is that for distance there is no other choice. distance of two // empty geometries (or one empty) should NOT return any value. // But for area it is no problem to be 0. // Suppose: area(intersection(a,b)). We (probably) don't want a throw there... // So decided that at least for Boost 1.49 this is commented for // scalar results, except distance. #if defined(BOOST_GEOMETRY_EMPTY_INPUT_NO_THROW) #include #endif namespace boost { namespace geometry { #ifndef DOXYGEN_NO_DETAIL namespace detail { template inline void throw_on_empty_input(Geometry const& geometry) { #if ! defined(BOOST_GEOMETRY_EMPTY_INPUT_NO_THROW) if (geometry::is_empty(geometry)) { throw empty_input_exception(); } #else boost::ignore_unused(geometry); #endif } } // namespace detail #endif // DOXYGEN_NO_DETAIL }} // namespace boost::geometry #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_THROW_ON_EMPTY_INPUT_HPP ``````