junrushao commented on code in PR #49:
URL: https://github.com/apache/tvm-ffi/pull/49#discussion_r2376805568
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python/tvm_ffi/cython/type_info.pxi:
##########
@@ -109,6 +110,50 @@ class TypeInfo:
type_cls: Optional[type]
type_index: int
type_key: str
+ type_ancestors: list[int]
fields: list[TypeField]
methods: list[TypeMethod]
parent_type_info: Optional[TypeInfo]
+
+ def __post_init__(self):
+ cdef int parent_type_index
+ cdef str parent_type_key
+ if not self.type_ancestors:
+ return
+ parent_type_index = self.type_ancestors[-1]
+ parent_type_key = _type_index_to_key(parent_type_index)
+ self.parent_type_info =
_lookup_type_info_from_type_key(parent_type_key) # ensure parent is registered
+
+ def prototype_py(self) -> str:
+ """Generate Python source code for a prototype class of this type.
+
+ The generated class will have the correct inheritance structure and
+ field definitions, but will not have any method definitions.
Review Comment:
It's not executed and is only used to provide hints to users who want to
write `@c_class`. Should be pretty copy-paste-ready quality as it looks like:
```python
from typing import Any
from tvm_ffi import dataclasses as D
from tvm_ffi import core
PARENT_TYPE = core._lookup_type_info_from_type_key('ffi.Object').type_cls
assert PARENT_TYPE is not None
@D.c_class('testing.TestUnregisteredObject')
class TestUnregisteredObject(PARENT_TYPE):
a: Any
@staticmethod
def __ffi_init__(*args): ...
```
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