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[strategies][comparable distance (result)] implement variant-aware

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comparable distance result
This commit is contained in:
Menelaos Karavelas
2014-07-08 12:39:36 +03:00
parent 325dbe203b
commit 77e4f4b472
1 changed files with 24 additions and 19 deletions
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43
include/boost/geometry/strategies/comparable_distance_result.hpp
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@@ -10,8 +10,10 @@
#ifndef BOOST_GEOMETRY_STRATEGIES_COMPARABLE_DISTANCE_RESULT_HPP
#define BOOST_GEOMETRY_STRATEGIES_COMPARABLE_DISTANCE_RESULT_HPP
#include <boost/geometry/core/point_type.hpp>
#include <boost/geometry/strategies/default_comparable_strategy.hpp>
#include <boost/geometry/strategies/default_strategy.hpp>
#include <boost/geometry/strategies/distance.hpp>
#include <boost/geometry/strategies/distance_result.hpp>
#include <boost/geometry/algorithms/detail/distance/default_strategies.hpp>
@@ -19,6 +21,7 @@
namespace boost { namespace geometry
{
/*!
\brief Meta-function defining return type of comparable_distance function
\ingroup distance
@@ -30,32 +33,34 @@ template
typename Strategy = void
>
struct comparable_distance_result
{
typedef typename strategy::distance::services::return_type
<
typename strategy::distance::services::comparable_type
<
Strategy
>::type,
typename point_type<Geometry1>::type,
typename point_type<Geometry2>::type
>::type type;
};
template <typename Geometry1, typename Geometry2>
struct comparable_distance_result<Geometry1, Geometry2, void>
: comparable_distance_result
: distance_result
<
Geometry1,
Geometry2,
typename detail::distance::default_strategy
typename strategy::distance::services::comparable_type
<
Geometry1, Geometry2
Strategy
>::type
>
{};
template <typename Geometry1, typename Geometry2>
struct comparable_distance_result<Geometry1, Geometry2, default_strategy>
: distance_result<Geometry1, Geometry2, default_comparable_strategy>
{};
template <typename Geometry1, typename Geometry2>
struct comparable_distance_result
<
Geometry1, Geometry2, default_comparable_strategy
> : distance_result<Geometry1, Geometry2, default_comparable_strategy>
{};
template <typename Geometry1, typename Geometry2>
struct comparable_distance_result<Geometry1, Geometry2, void>
: distance_result<Geometry1, Geometry2, default_comparable_strategy>
{};
}} // namespace boost::geometry