Now ClassVar cannot contain type variables, refs #11538

[sobolevn]

Some tests might fail, because I've only checked semanal test suite. I will fix them after the initial CI run.

Closes #11538

[sobolevn]

This change is important to me, because I use cmd + # to comment out all the files and uncomment only a single one I am interested in.

With the previous format it is impossible to do.

Btw, is there any more useful way to run all tests in a file?

[hauntsaninja]

pytest ./mypy/test/testsemanal.py works well for me. pytest -k search_phrase is also really useful

[sobolevn]

Yes, but pytest ./mypy/test/testsemanal.py will run all semanal-*.test files.
I am asking about a single .test file, for example only semanal-classvar.test

[sobolevn]

All testeval.py tests fail, because we need to merge python/typeshed#6348 and sync typeshed.

 ----------------------------- Captured stdout call -----------------------------
mypy/typeshed/stdlib/ctypes/__init__.pyi:176: error: ClassVar cannot contain type variables
mypy/typeshed/stdlib/ctypes/__init__.pyi:272: error: ClassVar cannot contain type variables

CC @JelleZijlstra

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

edgedb (https://github.com/edgedb/edgedb.git)
+ edb/common/parametric.py:321:5: error: ClassVar cannot contain type variables
+ edb/common/parametric.py:326:5: error: ClassVar cannot contain type variables
+ edb/common/parametric.py:327:5: error: ClassVar cannot contain type variables
+ edb/schema/delta.py:1655:5: error: ClassVar cannot contain type variables

[sobolevn]

@JukkaL yes, #11600 solved it! 🎉