Recursive type with List[] causing RecursionError

[gkaemmer]

• typical version: 2.0.25 2.0.32
• Python version: 3.8.1
• Operating System: Mac OSX

Description

Trying to use typical to serialize/deserialize a type that has a recursive field of type List:

@dataclasses.dataclass
class Node:
    children: List["Node"]

typic.transmute(Node, {"children": []})
# => raises RecursionError: maximum recursion depth exceeded

What I Did

Tried using "List[Node]" as the type, and from __future__ import annotations:

@dataclasses.dataclass
class Node:
    children: "List[Node]"

typic.transmute(Node, {"children": []})
# => raises RecursionError: maximum recursion depth exceeded

from __future__ import annotations
@dataclasses.dataclass
class Node:
    children: List[Node]

typic.transmute(Node, {"children": []})
# => raises RecursionError: maximum recursion depth exceeded

With Optional instead of List, it seems to work:

@dataclasses.dataclass
class Node:
    child: Optional["Node"]

typic.transmute(Node, {"children": Node})
# => Node(child=None)