object demand_iterator_class(char const* name, Iterator* = 0, NextPolicies const& policies = NextPolicies())
{
typedef iterator_range<NextPolicies,Iterator> range_;
// Check the registry. If one is already registered, return it.
handle<> class_obj(
objects::registered_class_object(python::type_id<range_>()));
if (class_obj.get() != 0)
return object(class_obj);
typedef typename range_::next_fn next_fn;
typedef typename next_fn::result_type result_type;
return class_<range_>(name, no_init)
.def("__iter__", identity_function())
.def(
#if PY_VERSION_HEX >= 0x03000000
"__next__"
#else
"next"
#endif
, make_function(
next_fn()
, policies
, mpl::vector2<result_type,range_&>()
));
}
object demand_iterator_class(char const* name, Iterator* = 0, NextPolicies const& policies = NextPolicies())
{
typedef iterator_range<NextPolicies,Iterator> range_;
// Check the registry. If one is already registered, return it.
handle<> class_obj(
objects::registered_class_object(python::type_id<range_>()));
if (class_obj.get() != 0)
return object(class_obj);
// Make a callable object which can be used as the iterator's next() function.
object next_function =
objects::function_object(
bind(&detail::iterator_next<Iterator,NextPolicies>::execute, _1, _2, policies)
, 1);
return class_<range_>(name, no_init)
.def("__iter__", identity_function())
.setattr("next", next_function)
;
}
void register_alias( const char* name ){
namespace bpl = boost::python;
bpl::handle<> class_obj( bpl::objects::registered_class_object( bpl::type_id< T >()));
boost::python::scope().attr( name ) = bpl::object( class_obj );
}
bool is_registered(){
namespace bpl = boost::python;
bpl::handle<> class_obj( bpl::objects::registered_class_object( bpl::type_id< T >()));
return class_obj.get() ? true : false;
}
