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[ty] Support using legacy typing aliases for generic classes in type annotations (#18404)
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Co-authored-by: Alex Waygood <alex.waygood@gmail.com>
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4 changed files with 158 additions and 63 deletions
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@ -31,41 +31,81 @@ def f(
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ordered_dict_parametrized: typing.OrderedDict[int, str],
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):
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reveal_type(list_bare) # revealed: list[Unknown]
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# TODO: revealed: list[int]
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reveal_type(list_parametrized) # revealed: list[Unknown]
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reveal_type(list_parametrized) # revealed: list[int]
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reveal_type(dict_bare) # revealed: dict[Unknown, Unknown]
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# TODO: revealed: dict[int, str]
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reveal_type(dict_parametrized) # revealed: dict[Unknown, Unknown]
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reveal_type(dict_parametrized) # revealed: dict[int, str]
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reveal_type(set_bare) # revealed: set[Unknown]
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# TODO: revealed: set[int]
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reveal_type(set_parametrized) # revealed: set[Unknown]
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reveal_type(set_parametrized) # revealed: set[int]
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# TODO: revealed: frozenset[Unknown]
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reveal_type(frozen_set_bare) # revealed: frozenset[Unknown]
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# TODO: revealed: frozenset[str]
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reveal_type(frozen_set_parametrized) # revealed: frozenset[Unknown]
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reveal_type(frozen_set_parametrized) # revealed: frozenset[str]
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reveal_type(chain_map_bare) # revealed: ChainMap[Unknown, Unknown]
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# TODO: revealed: ChainMap[str, int]
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reveal_type(chain_map_parametrized) # revealed: ChainMap[Unknown, Unknown]
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reveal_type(chain_map_parametrized) # revealed: ChainMap[str, int]
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reveal_type(counter_bare) # revealed: Counter[Unknown]
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# TODO: revealed: Counter[int]
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reveal_type(counter_parametrized) # revealed: Counter[Unknown]
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reveal_type(counter_parametrized) # revealed: Counter[int]
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reveal_type(default_dict_bare) # revealed: defaultdict[Unknown, Unknown]
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# TODO: revealed: defaultdict[str, int]
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reveal_type(default_dict_parametrized) # revealed: defaultdict[Unknown, Unknown]
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reveal_type(default_dict_parametrized) # revealed: defaultdict[str, int]
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reveal_type(deque_bare) # revealed: deque[Unknown]
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# TODO: revealed: deque[str]
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reveal_type(deque_parametrized) # revealed: deque[Unknown]
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reveal_type(deque_parametrized) # revealed: deque[str]
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reveal_type(ordered_dict_bare) # revealed: OrderedDict[Unknown, Unknown]
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# TODO: revealed: OrderedDict[int, str]
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reveal_type(ordered_dict_parametrized) # revealed: OrderedDict[Unknown, Unknown]
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reveal_type(ordered_dict_parametrized) # revealed: OrderedDict[int, str]
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```
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## Incorrect number of type arguments
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In case the incorrect number of type arguments is passed, a diagnostic is given.
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```py
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import typing
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def f(
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# error: [invalid-type-form] "Legacy alias `typing.List` expected exactly 1 argument, got 2"
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incorrect_list: typing.List[int, int],
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# error: [invalid-type-form] "Legacy alias `typing.Dict` expected exactly 2 arguments, got 3"
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incorrect_dict: typing.Dict[int, int, int],
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# error: [invalid-type-form] "Legacy alias `typing.Dict` expected exactly 2 arguments, got 1"
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incorrect_dict2: typing.Dict[int], # type argument is not a tuple here
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# error: [invalid-type-form]
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incorrect_set: typing.Set[int, int],
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# error: [invalid-type-form]
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incorrect_frozen_set: typing.FrozenSet[int, int],
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# error: [invalid-type-form]
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incorrect_chain_map: typing.ChainMap[int, int, int],
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# error: [invalid-type-form]
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incorrect_chain_map2: typing.ChainMap[int],
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# error: [invalid-type-form]
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incorrect_counter: typing.Counter[int, int],
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# error: [invalid-type-form]
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incorrect_default_dict: typing.DefaultDict[int, int, int],
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# error: [invalid-type-form]
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incorrect_default_dict2: typing.DefaultDict[int],
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# error: [invalid-type-form]
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incorrect_deque: typing.Deque[int, int],
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# error: [invalid-type-form]
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incorrect_ordered_dict: typing.OrderedDict[int, int, int],
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# error: [invalid-type-form]
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incorrect_ordered_dict2: typing.OrderedDict[int],
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):
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reveal_type(incorrect_list) # revealed: list[Unknown]
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reveal_type(incorrect_dict) # revealed: dict[Unknown, Unknown]
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reveal_type(incorrect_dict2) # revealed: dict[Unknown, Unknown]
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reveal_type(incorrect_set) # revealed: set[Unknown]
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reveal_type(incorrect_frozen_set) # revealed: frozenset[Unknown]
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reveal_type(incorrect_chain_map) # revealed: ChainMap[Unknown, Unknown]
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reveal_type(incorrect_chain_map2) # revealed: ChainMap[Unknown, Unknown]
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reveal_type(incorrect_counter) # revealed: Counter[Unknown]
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reveal_type(incorrect_default_dict) # revealed: defaultdict[Unknown, Unknown]
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reveal_type(incorrect_default_dict2) # revealed: defaultdict[Unknown, Unknown]
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reveal_type(incorrect_deque) # revealed: deque[Unknown]
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reveal_type(incorrect_ordered_dict) # revealed: OrderedDict[Unknown, Unknown]
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reveal_type(incorrect_ordered_dict2) # revealed: OrderedDict[Unknown, Unknown]
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```
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## Inheritance
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