lsst::daf::persistence::python Namespace Reference

Classes
class	ReadProxyBase
	Base class for lazy-loading proxy. More...

Functions
template<typename OutputType >
void	register_proxy ()
	Register a type for (optional) lazy load. More...

Function Documentation

register_proxy()

template<typename OutputType >

void lsst::daf::persistence::python::register_proxy

(

)

Register a type for (optional) lazy load.

When called in the pybind11 wrapper this function adds an implict conversion from ReadProxy to the registered type.

Template Parameters

OutputType

Type to register (e.g. DateTime)

Definition at line 56 of file readProxy.h.

                                                     {
    namespace py = pybind11;
    auto implicit_caster = [](PyObject *obj, PyTypeObject *type) -> PyObject * {
        if (!py::detail::make_caster<lsst::daf::persistence::python::ReadProxyBase>().load(obj, false)) {
            return nullptr;
        }
        PyObject *result = PyObject_GetAttrString(obj, "__subject__");
        if (result == nullptr) {
            PyErr_Clear();  // needed to fall through to next conversion
        }
        return result;
    };
 
    if (auto tinfo = py::detail::get_type_info(typeid(OutputType))) {
        tinfo->implicit_conversions.push_back(implicit_caster);
    } else {
        py::pybind11_fail("register_proxy: Unable to find type " + py::type_id<OutputType>());
    }
}