from __future__ import annotations
from dataclasses import dataclass

class Int:
  pass

class Bool:
  pass

class Unit:
  pass

Int_Instance = Int()
Bool_Instance = Bool()
Unit_Instance = Unit()

class Any(Int, Bool, Unit):
  pass

Any_Instance = Any()

type Type = Int | Bool | Unit | FunType

ParamsType = Type | list[Type | list['ParamsType']]

@dataclass
class FunType:
  params: ParamsType
  result: Type