Release 1.2 planning

[JukkaL]

I'm planning to make a 1.2 release either around Mar 23 or April 4 (tentative timeline; I'm on vacation between the dates).

Please post here any issues you'd like to see fixed in the release, or PRs you'd like to have merged. I'll cut the release branch around Mar 21.

Here are a few things I'd like to have in the release:

• Remaining dataclass transform fixes (if not included in a 1.1.x bug fix release)
• Document native integers and native floats in mypyc

[JukkaL]

A minor regression introduced with recent typeshed changes that trigger a bug:

• Cannot infer type argument from overloaded function with explicit self types #14943

[JukkaL]

This hopefully fixes release blocking build issues in some configurations:

• [mypyc] Be stricter about function prototypes #14942

[JukkaL]

Fix to another release blocker (already merged) that fixed wheel builds:

• [mypyc] Fixes to float to int conversion #14936

[JukkaL]

I've now cut the release branch: https://github.com/python/mypy/tree/release-1.2

Fixes to bugs, documentation updates, and dataclass transform improvements can still be cherry-picked to the release branch.

I expect the release to go out around April 4. I will be on vacation the next week, but I will follow this issue (but not every day).

[wesleywright]

Another tiny dataclass_transform fix: #14958

[tyralla]

Could you cherry-pick 1dd26a3? When using 1.1.1, I need to add unspecific "type ignore" (misc) commands to many class definitions in my code base that could hide actual bugs. With 1dd26a3, the problem should be gone.

[AlexWaygood]

A minor regression introduced with recent typeshed changes that trigger a bug:

• Cannot infer type argument from overloaded function with explicit self types #14943

This PR claims to have a fix:

• Fix type argument inference for overloaded functions with explicit self types (Fixes #14943). #14975

[JukkaL]

I cherry-picked these PRs:

• [dataclass_transform] fix serialization for frozen_default #14958
• Let the multiple inheritance checks consider callable objects as possible subtypes of usual functions (Fixes #14852). #14855
• Support descriptors in dataclass transform #15006

#14975 needs some more work, but we can cherry-pick it if it is completed soon (or we can include it in a point release).

I'd still like to include #14870. I'm working on finishing it.

[JukkaL]

Also cherry-picked this final dataclass transform fix:

• [dataclass_transform] support implicit default for "init" parameter in field specifiers #15010

[JukkaL]

Now that we have all essential fixes in, I'm planning to make the release tomorrow (Thu Apr 6).

[JukkaL]

The release is now out: https://mypy-lang.blogspot.com/2023/04/mypy-12-released.html