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// Original code by Hans Meine <meine <at> kogs1.informatik.uni-hamburg.de>:
// Subject: Re: Raw constructor (i.e. combination of make_constructor and raw_function)
// Newsgroups: gmane.comp.python.c++
// Date: 2005-11-17 18:43:48 GMT
// No copyright statement found. Presumed to be in the public domain.
#ifndef RAW_CONSTRUCTOR_HPP
#define RAW_CONSTRUCTOR_HPP
#include <boost/python.hpp>
#include <boost/python/raw_function.hpp>
#include <boost/python/make_constructor.hpp>
#include "boost/python/detail/api_placeholder.hpp" // python::len
namespace boost { namespace python {
namespace detail {
template <class F>
struct raw_constructor_dispatcher
{
raw_constructor_dispatcher(F f)
: f(make_constructor(f)) {}
PyObject* operator()(PyObject* args, PyObject* keywords)
{
borrowed_reference_t* ra = borrowed_reference(args);
object a(ra);
return incref(
object(
f(
object(a[0])
, object(a.slice(0, len(a)))
, keywords ? dict(borrowed_reference(keywords)) : dict()
)
).ptr()
);
}
private:
object f;
};
} // namespace detail
template <class F>
object raw_constructor(F f, int min_args = 0)
{
return detail::make_raw_function(
objects::py_function(
detail::raw_constructor_dispatcher<F>(f)
, mpl::vector2<void, object>()
, min_args+1
, (std::numeric_limits<unsigned>::max)()
)
);
}
}} // namespace boost::python
#endif // RAW_CONSTRUCTOR_HPP
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