Error in conversion

[rgusmero]

Please consider the following code:

import dataglasses
from dataclasses import dataclass

@dataclass
class A:
    x: int

def coerce(val: int | str) -> int:

    try:
        return int(val)
    except ValueError as e:
        raise ValueError(f'Cannot coerce {val!r} to int')

transform = {
    int: (int | str, coerce)
}

a = dataglasses.from_dict(A,{'x': 1},transform=transform)

It fails with

TypeError: Expected value corresponding to one of (<class 'int'>, <class 'str'>), got 1

even though 1 is a lecit integer.

The reason is that the presence of int in the returned union creates an infinite recursion because the system tries to apply transform rules to it a receives it back again and again (in the form or a union). Maybe a possible fix is to add transformed=transformed as argument of _from_dict in the union management block?

P.S. Same beaviour (infinite recursion) is fired in schema generation