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from typing import Callable
from typish import T
class State:
"""
A class which instances hold any state that may be used by typish.
"""
def __init__(self) -> None:
"""
Constructor.
"""
self.get_type_per_cls = {}
def register_get_type(
self,
cls: T,
get_type_function: Callable[[T], type]) -> None:
"""
Register a callable for some type that is to be used when calling
typish.get_type.
:param cls: the type for which that given callable is to be called.
:param get_type_function: the callable to call for that type.
:return: None.
"""
self.get_type_per_cls[cls] = get_type_function
DEFAULT = State()
def register_get_type(
cls: T,
get_type_function: Callable[[T], type],
state: State = DEFAULT) -> None:
"""
Register a callable for some type that is to be used when calling
typish.get_type.
:param cls: the type for which that given callable is to be called.
:param get_type_function: the callable to call for that type.
:param state: any state that is used by typish.
:return: None.
"""
state.register_get_type(cls, get_type_function)
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