feat: add primitive for weakref.ref with 1 arg

Author: BobTheBuidler

mypyc/primitives/weakref_ops.py

@@ -1,9 +1,18 @@
 from mypyc.ir.ops import ERR_MAGIC
-from mypyc.ir.rtypes import object_rprimitive
+from mypyc.ir.rtypes import object_rprimitive, pointer_rprimitive
 from mypyc.primitives.registry import function_op
 
 # Weakref operations
 
+new_ref_op = function_op(
+    name="weakref.ReferenceType",
+    arg_types=[object_rprimitive],
+    return_type=object_rprimitive,
+    c_function_name="PyWeakref_NewRef",
+    extra_int_constants=[(0, pointer_rprimitive)],
+    error_kind=ERR_MAGIC,
+)
+
 new_ref_op = function_op(
     name="weakref.ReferenceType",
     arg_types=[object_rprimitive, object_rprimitive],