private static void InitClassBase(Type type, ClassBase impl)
{
// Ensure, that matching Python type exists first.
// It is required for self-referential classes
// (e.g. with members, that refer to the same class)
var pyType = TypeManager.GetOrCreateClass(type);
// Set the handle attributes on the implementing instance.
impl.tpHandle = impl.pyHandle = pyType.Handle;
// First, we introspect the managed type and build some class
// information, including generating the member descriptors
// that we'll be putting in the Python class __dict__.
ClassInfo info = GetClassInfo(type);
impl.indexer = info.indexer;
impl.richcompare = new Dictionary <int, MethodObject>();
// Now we force initialize the Python type object to reflect the given
// managed type, filling the Python type slots with thunks that
// point to the managed methods providing the implementation.
TypeManager.GetOrInitializeClass(impl, type);
// Finally, initialize the class __dict__ and return the object.
using var dict = Runtime.PyObject_GenericGetDict(pyType.Reference);
if (impl.dotNetMembers == null)
{
impl.dotNetMembers = new List <string>();
}
IDictionaryEnumerator iter = info.members.GetEnumerator();
while (iter.MoveNext())
{
var item = (ManagedType)iter.Value;
var name = (string)iter.Key;
impl.dotNetMembers.Add(name);
Runtime.PyDict_SetItemString(dict, name, item.ObjectReference);
// Decref the item now that it's been used.
item.DecrRefCount();
if (ClassBase.CilToPyOpMap.TryGetValue(name, out var pyOp))
{
impl.richcompare.Add(pyOp, (MethodObject)item);
}
}
// If class has constructors, generate an __doc__ attribute.
NewReference doc = default;
Type marker = typeof(DocStringAttribute);
var attrs = (Attribute[])type.GetCustomAttributes(marker, false);
if (attrs.Length != 0)
{
var attr = (DocStringAttribute)attrs[0];
string docStr = attr.DocString;
doc = NewReference.DangerousFromPointer(Runtime.PyString_FromString(docStr));
Runtime.PyDict_SetItem(dict, PyIdentifier.__doc__, doc);
}
var co = impl as ClassObject;
// If this is a ClassObject AND it has constructors, generate a __doc__ attribute.
// required that the ClassObject.ctors be changed to internal
if (co != null)
{
if (co.NumCtors > 0)
{
// Implement Overloads on the class object
if (!CLRModule._SuppressOverloads)
{
var ctors = new ConstructorBinding(type, pyType, co.binder);
// ExtensionType types are untracked, so don't Incref() them.
// TODO: deprecate __overloads__ soon...
Runtime.PyDict_SetItem(dict, PyIdentifier.__overloads__, ctors.ObjectReference);
Runtime.PyDict_SetItem(dict, PyIdentifier.Overloads, ctors.ObjectReference);
ctors.DecrRefCount();
}
// don't generate the docstring if one was already set from a DocStringAttribute.
if (!CLRModule._SuppressDocs && doc.IsNull())
{
doc = co.GetDocString();
Runtime.PyDict_SetItem(dict, PyIdentifier.__doc__, doc);
}
}
}
doc.Dispose();
// The type has been modified after PyType_Ready has been called
// Refresh the type
Runtime.PyType_Modified(pyType.Reference);
}
