Support additional Type[x] values as first super() argument

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
42/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
python
Domain
devtools

Research direction

Review follow-up issue #3919 and the current handling of Type[C] as the first super() argument. Trace how mypy processes super() and Type[x], then define the additional variants in scope, starting with Type[T]. Done means the supported forms type-check correctly without regressing existing Type[C] behavior.

Written by the indexing model from the issue text.

Description

feature priority-1-normal

Currently the only variant of Type[x] supported as the first super() argument is Type[C] where C is a class. Some others should probably be supported as well -- at least Type[T] where T is a type variable.

This is follow-up to #3919.

Dominant language
Python
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Avg merge
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Merged PRs (30d)
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