78 lines
2 KiB
C++
78 lines
2 KiB
C++
#ifndef _PY_UTILS_H
|
|
#define _PY_UTILS_H
|
|
|
|
template <typename T, typename TfromPy>
|
|
struct object_from_python
|
|
{
|
|
object_from_python() {
|
|
boost::python::converter::registry::push_back
|
|
(&TfromPy::convertible, &TfromPy::construct,
|
|
boost::python::type_id<T>());
|
|
}
|
|
};
|
|
|
|
template <typename T, typename TtoPy, typename TfromPy>
|
|
struct register_python_conversion
|
|
{
|
|
register_python_conversion() {
|
|
boost::python::to_python_converter<T, TtoPy>();
|
|
object_from_python<T, TfromPy>();
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct python_optional : public boost::noncopyable
|
|
{
|
|
struct optional_to_python
|
|
{
|
|
static PyObject * convert(const boost::optional<T>& value)
|
|
{
|
|
return (value ? boost::python::to_python_value<T>()(*value) :
|
|
boost::python::detail::none());
|
|
}
|
|
};
|
|
|
|
struct optional_from_python
|
|
{
|
|
static void * convertible(PyObject * source)
|
|
{
|
|
using namespace boost::python::converter;
|
|
|
|
if (source == Py_None)
|
|
return source;
|
|
|
|
const registration& converters(registered<T>::converters);
|
|
|
|
if (implicit_rvalue_convertible_from_python(source, converters)) {
|
|
rvalue_from_python_stage1_data data =
|
|
rvalue_from_python_stage1(source, converters);
|
|
return rvalue_from_python_stage2(source, data, converters);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void construct(PyObject * source,
|
|
boost::python::converter::rvalue_from_python_stage1_data * data)
|
|
{
|
|
using namespace boost::python::converter;
|
|
|
|
void * const storage = ((rvalue_from_python_storage<T> *) data)->storage.bytes;
|
|
|
|
if (data->convertible == source) // == None
|
|
new (storage) boost::optional<T>(); // A Boost uninitialized value
|
|
else
|
|
new (storage) boost::optional<T>(*static_cast<T *>(data->convertible));
|
|
|
|
data->convertible = storage;
|
|
}
|
|
};
|
|
|
|
explicit python_optional() {
|
|
register_python_conversion<boost::optional<T>,
|
|
optional_to_python, optional_from_python>();
|
|
}
|
|
};
|
|
|
|
//boost::python::register_ptr_to_python< boost::shared_ptr<Base> >();
|
|
|
|
#endif // _PY_UTILS_H
|