boost::geometry::index::indexable

operator()(Value const &)
operator()(V const &)

The function object extracting Indexable from Value.

Description

It translates Value object to Indexable object. By default, it can handle Values which are Indexables, std::pair<Indexable, T2>, boost::tuple<Indexable, ...> and std::tuple<Indexable, ...> if STD tuples and variadic templates are supported.

Header

#include <boost/geometry/index/indexable.hpp>

Synopsis

template<typename Value>
struct indexable
{
  // ...
};

Template parameter(s)

Parameter	Description
`Value`	The Value type which may be translated directly to the Indexable.

Typedef(s)

Type	Description
`result_type`	The type of result returned by function object. It should be const Indexable reference.

Member(s)

Modifier	Function	Description
`const`	`operator()(Value const &)`	Return indexable extracted from the value.
`const`	`operator()(V const &)`	Return indexable extracted from the value. Overload for types compatible with Value but different yet holding referencable Indexable, e.g. tuple containing a reference.

operator()(Value const &)

Return indexable extracted from the value.

Synopsis

result_type operator()(Value const & v)

Modifier(s)

const

Parameter(s)

Type	Name	Description
`Value const &`	`v`	The value.

Returns

The indexable.

operator()(V const &)

Return indexable extracted from the value. Overload for types compatible with Value but different yet holding referencable Indexable, e.g. tuple containing a reference.

Synopsis

template<typename V>
result_type operator()(V const & v)

Modifier(s)

const

Parameter(s)

Type	Name	Description
`V const &`	`v`	The value.

Returns

The indexable.