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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
// Copyright (c) 2008-2012 Barend Gehrels, Amsterdam, the Netherlands.
// 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_GEOMETRIES_CONCEPTS_BOX_CONCEPT_HPP
#define BOOST_GEOMETRY_GEOMETRIES_CONCEPTS_BOX_CONCEPT_HPP
#include <cstddef>
#include <boost/concept_check.hpp>
#include <boost/core/ignore_unused.hpp>
#include <boost/geometry/core/access.hpp>
#include <boost/geometry/core/coordinate_dimension.hpp>
#include <boost/geometry/core/point_type.hpp>
#include <boost/geometry/geometries/concepts/concept_type.hpp>
namespace boost { namespace geometry { namespace concepts
{
/*!
\brief Box concept
\ingroup concepts
\par Formal definition:
The box concept is defined as following:
- there must be a specialization of traits::tag defining box_tag as type
- there must be a specialization of traits::point_type to define the
underlying point type (even if it does not consist of points, it should define
this type, to indicate the points it can work with)
- there must be a specialization of traits::indexed_access, per index
(min_corner, max_corner) and per dimension, with two functions:
- get to get a coordinate value
- set to set a coordinate value (this one is not checked for ConstBox)
*/
template <typename Geometry>
class Box
{
#ifndef DOXYGEN_NO_CONCEPT_MEMBERS
typedef typename point_type<Geometry>::type point_type;
template
<
std::size_t Index,
std::size_t Dimension,
std::size_t DimensionCount
>
struct dimension_checker
{
static void apply()
{
Geometry* b = 0;
geometry::set<Index, Dimension>(*b, geometry::get<Index, Dimension>(*b));
dimension_checker<Index, Dimension + 1, DimensionCount>::apply();
}
};
template <std::size_t Index, std::size_t DimensionCount>
struct dimension_checker<Index, DimensionCount, DimensionCount>
{
static void apply() {}
};
public :
BOOST_CONCEPT_USAGE(Box)
{
static const std::size_t n = dimension<Geometry>::type::value;
dimension_checker<min_corner, 0, n>::apply();
dimension_checker<max_corner, 0, n>::apply();
}
#endif
};
/*!
\brief Box concept (const version)
\ingroup const_concepts
\details The ConstBox concept apply the same as the Box concept,
but does not apply write access.
*/
template <typename Geometry>
class ConstBox
{
#ifndef DOXYGEN_NO_CONCEPT_MEMBERS
typedef typename point_type<Geometry>::type point_type;
typedef typename coordinate_type<Geometry>::type coordinate_type;
template
<
std::size_t Index,
std::size_t Dimension,
std::size_t DimensionCount
>
struct dimension_checker
{
static void apply()
{
const Geometry* b = 0;
coordinate_type coord(geometry::get<Index, Dimension>(*b));
boost::ignore_unused(coord);
dimension_checker<Index, Dimension + 1, DimensionCount>::apply();
}
};
template <std::size_t Index, std::size_t DimensionCount>
struct dimension_checker<Index, DimensionCount, DimensionCount>
{
static void apply() {}
};
public :
BOOST_CONCEPT_USAGE(ConstBox)
{
static const std::size_t n = dimension<Geometry>::type::value;
dimension_checker<min_corner, 0, n>::apply();
dimension_checker<max_corner, 0, n>::apply();
}
#endif
};
template <typename Geometry>
struct concept_type<Geometry, box_tag>
{
using type = Box<Geometry>;
};
template <typename Geometry>
struct concept_type<Geometry const, box_tag>
{
using type = ConstBox<Geometry>;
};
}}} // namespace boost::geometry::concepts
#endif // BOOST_GEOMETRY_GEOMETRIES_CONCEPTS_BOX_CONCEPT_HPP
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