mirror of
https://github.com/boostorg/python.git
synced 2026-01-20 16:52:15 +00:00
44 lines
1.5 KiB
C++
44 lines
1.5 KiB
C++
// Copyright David Abrahams 2002. Permission to copy, use,
|
|
// modify, sell and distribute this software is granted provided this
|
|
// copyright notice appears in all copies. This software is provided
|
|
// "as is" without express or implied warranty, and with no claim as
|
|
// to its suitability for any purpose.
|
|
#ifndef IMPLICIT_DWA2002326_HPP
|
|
# define IMPLICIT_DWA2002326_HPP
|
|
|
|
# include <boost/python/converter/rvalue_from_python_data.hpp>
|
|
# include <boost/python/converter/registrations.hpp>
|
|
# include <boost/python/converter/registered.hpp>
|
|
|
|
# include <boost/python/extract.hpp>
|
|
|
|
namespace boost { namespace python { namespace converter {
|
|
|
|
template <class Source, class Target>
|
|
struct implicit
|
|
{
|
|
static void* convertible(PyObject* obj)
|
|
{
|
|
// Find a converter which can produce a Source instance from
|
|
// obj. The user has told us that Source can be converted to
|
|
// Target, and instantiating construct() below, ensures that
|
|
// at compile-time.
|
|
return implicit_rvalue_convertible_from_python(obj, registered<Source>::converters)
|
|
? obj : 0;
|
|
}
|
|
|
|
static void construct(PyObject* obj, rvalue_from_python_stage1_data* data)
|
|
{
|
|
void* storage = ((rvalue_from_python_storage<Target>*)data)->storage.bytes;
|
|
|
|
new (storage) Target(extract<Source>(obj)());
|
|
|
|
// record successful construction
|
|
data->convertible = storage;
|
|
}
|
|
};
|
|
|
|
}}} // namespace boost::python::converter
|
|
|
|
#endif // IMPLICIT_DWA2002326_HPP
|