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gh-112618: Make Annotated cache typed (#112619)

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Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
This commit is contained in:
Nikita Sobolev 2023-12-02 19:10:19 +03:00 • committed by GitHub
parent a74daba7ca
commit a35a305098
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3 changed files with 42 additions and 5 deletions
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11
Lib/typing.py
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@ -490,7 +490,7 @@ class _SpecialForm(_Final, _NotIterable, _root=True):
return self._getitem(self, parameters)
class _LiteralSpecialForm(_SpecialForm, _root=True):
class _TypedCacheSpecialForm(_SpecialForm, _root=True):
def __getitem__(self, parameters):
if not isinstance(parameters, tuple):
parameters = (parameters,)
@ -723,7 +723,7 @@ def Optional(self, parameters):
arg = _type_check(parameters, f"{self} requires a single type.")
return Union[arg, type(None)]
@_LiteralSpecialForm
@_TypedCacheSpecialForm
@_tp_cache(typed=True)
def Literal(self, *parameters):
"""Special typing form to define literal types (a.k.a. value types).
@ -2005,8 +2005,9 @@ class _AnnotatedAlias(_NotIterable, _GenericAlias, _root=True):
return (self.__origin__,)
@_SpecialForm
def Annotated(self, params):
@_TypedCacheSpecialForm
@_tp_cache(typed=True)
def Annotated(self, *params):
"""Add context-specific metadata to a type.
Example: Annotated[int, runtime_check.Unsigned] indicates to the
@ -2053,7 +2054,7 @@ def Annotated(self, params):
where T1, T2 etc. are TypeVars, which would be invalid, because
only one type should be passed to Annotated.
"""
if not isinstance(params, tuple) or len(params) < 2:
if len(params) < 2:
raise TypeError("Annotated[...] should be used "
"with at least two arguments (a type and an "
"annotation).")