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// 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_WITHIN_CONCEPT_HPP
#define BOOST_GEOMETRY_STRATEGIES_CONCEPTS_WITHIN_CONCEPT_HPP
#include <boost/concept_check.hpp>
#include <boost/function_types/result_type.hpp>
#include <boost/geometry/util/parameter_type_of.hpp>
namespace boost { namespace geometry { namespace concept
{
/*!
\brief Checks strategy for within (point-in-polygon)
\ingroup within
*/
template <typename Strategy>
class WithinStrategyPolygonal
{
#ifndef DOXYGEN_NO_CONCEPT_MEMBERS
// 1) must define state_type
typedef typename Strategy::state_type state_type;
struct checker
{
template <typename ApplyMethod, typename ResultMethod>
static void apply(ApplyMethod const&, ResultMethod const& )
{
typedef typename parameter_type_of
<
ApplyMethod, 0
>::type point_type;
typedef typename parameter_type_of
<
ApplyMethod, 1
>::type segment_point_type;
// CHECK: apply-arguments should both fulfill point concept
BOOST_CONCEPT_ASSERT
(
(concept::ConstPoint<point_type>)
);
BOOST_CONCEPT_ASSERT
(
(concept::ConstPoint<segment_point_type>)
);
// CHECK: return types (result: int, apply: bool)
BOOST_MPL_ASSERT_MSG
(
(boost::is_same
<
bool, typename boost::function_types::result_type<ApplyMethod>::type
>::type::value),
WRONG_RETURN_TYPE_OF_APPLY
, (bool)
);
BOOST_MPL_ASSERT_MSG
(
(boost::is_same
<
int, typename boost::function_types::result_type<ResultMethod>::type
>::type::value),
WRONG_RETURN_TYPE_OF_RESULT
, (int)
);
// CHECK: calling method apply and result
Strategy const* str = 0;
state_type* st = 0;
point_type const* p = 0;
segment_point_type const* sp = 0;
bool b = str->apply(*p, *sp, *sp, *st);
int r = str->result(*st);
boost::ignore_unused_variable_warning(r);
boost::ignore_unused_variable_warning(b);
boost::ignore_unused_variable_warning(str);
}
};
public :
BOOST_CONCEPT_USAGE(WithinStrategyPolygonal)
{
checker::apply(&Strategy::apply, &Strategy::result);
}
#endif
};
template <typename Strategy>
class WithinStrategyPointBox
{
#ifndef DOXYGEN_NO_CONCEPT_MEMBERS
struct checker
{
template <typename ApplyMethod>
static void apply(ApplyMethod const&)
{
typedef typename parameter_type_of
<
ApplyMethod, 0
>::type point_type;
typedef typename parameter_type_of
<
ApplyMethod, 1
>::type box_type;
// CHECK: apply-arguments should fulfill point/box concept
BOOST_CONCEPT_ASSERT
(
(concept::ConstPoint<point_type>)
);
BOOST_CONCEPT_ASSERT
(
(concept::ConstBox<box_type>)
);
// CHECK: return types (apply: bool)
BOOST_MPL_ASSERT_MSG
(
(boost::is_same
<
bool,
typename boost::function_types::result_type<ApplyMethod>::type
>::type::value),
WRONG_RETURN_TYPE
, (bool)
);
// CHECK: calling method apply
Strategy const* str = 0;
point_type const* p = 0;
box_type const* bx = 0;
bool b = str->apply(*p, *bx);
boost::ignore_unused_variable_warning(b);
boost::ignore_unused_variable_warning(str);
}
};
public :
BOOST_CONCEPT_USAGE(WithinStrategyPointBox)
{
checker::apply(&Strategy::apply);
}
#endif
};
template <typename Strategy>
class WithinStrategyBoxBox
{
#ifndef DOXYGEN_NO_CONCEPT_MEMBERS
struct checker
{
template <typename ApplyMethod>
static void apply(ApplyMethod const&)
{
typedef typename parameter_type_of
<
ApplyMethod, 0
>::type box_type1;
typedef typename parameter_type_of
<
ApplyMethod, 1
>::type box_type2;
// CHECK: apply-arguments should both fulfill box concept
BOOST_CONCEPT_ASSERT
(
(concept::ConstBox<box_type1>)
);
BOOST_CONCEPT_ASSERT
(
(concept::ConstBox<box_type2>)
);
// CHECK: return types (apply: bool)
BOOST_MPL_ASSERT_MSG
(
(boost::is_same
<
bool,
typename boost::function_types::result_type<ApplyMethod>::type
>::type::value),
WRONG_RETURN_TYPE
, (bool)
);
// CHECK: calling method apply
Strategy const* str = 0;
box_type1 const* b1 = 0;
box_type2 const* b2 = 0;
bool b = str->apply(*b1, *b2);
boost::ignore_unused_variable_warning(b);
boost::ignore_unused_variable_warning(str);
}
};
public :
BOOST_CONCEPT_USAGE(WithinStrategyBoxBox)
{
checker::apply(&Strategy::apply);
}
#endif
};
// So now: boost::geometry::concept::within
namespace within
{
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
template <typename FirstTag, typename SecondTag, typename CastedTag, typename Strategy>
struct check_within
{};
template <typename AnyTag, typename Strategy>
struct check_within<point_tag, AnyTag, areal_tag, Strategy>
{
BOOST_CONCEPT_ASSERT( (WithinStrategyPolygonal<Strategy>) );
};
template <typename Strategy>
struct check_within<point_tag, box_tag, areal_tag, Strategy>
{
BOOST_CONCEPT_ASSERT( (WithinStrategyPointBox<Strategy>) );
};
template <typename Strategy>
struct check_within<box_tag, box_tag, areal_tag, Strategy>
{
BOOST_CONCEPT_ASSERT( (WithinStrategyBoxBox<Strategy>) );
};
} // namespace dispatch
#endif
/*!
\brief Checks, in compile-time, the concept of any within-strategy
\ingroup concepts
*/
template <typename FirstTag, typename SecondTag, typename CastedTag, typename Strategy>
inline void check()
{
dispatch::check_within<FirstTag, SecondTag, CastedTag, Strategy> c;
boost::ignore_unused_variable_warning(c);
}
}}}} // namespace boost::geometry::concept::within
#endif // BOOST_GEOMETRY_STRATEGIES_CONCEPTS_WITHIN_CONCEPT_HPP
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