/usr/include/boost/geometry/strategies/concepts/area_concept.hpp is in libboost1.55-dev 1.55.0+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 65 66 67 68 69 70 71 72 73 74 75 | // 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.
// 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 = 0;
state_type *st = 0;
// 4) must implement a method apply with the following signature
spoint_type const* sp = 0;
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
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