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* Update ga_new to use _PyArg_CheckPositional and _PyArg_NoKwnames (GH-19679)Dong-hee Na2020-04-241-4/+2
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* bpo-40268: Remove unused structmember.h includes (GH-19530)Victor Stinner2020-04-151-2/+2
| | | | | | If only offsetof() is needed: include stddef.h instead. When structmember.h is used, add a comment explaining that PyMemberDef is used.
* bpo-39481: Implementation for PEP 585 (#18239)Guido van Rossum2020-04-071-0/+507
This implements things like `list[int]`, which returns an object of type `types.GenericAlias`. This object mostly acts as a proxy for `list`, but has attributes `__origin__` and `__args__` that allow recovering the parts (with values `list` and `(int,)`. There is also an approximate notion of type variables; e.g. `list[T]` has a `__parameters__` attribute equal to `(T,)`. Type variables are objects of type `typing.TypeVar`.