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closes #48729

I've noticed that this already works in nightly and narrowed it down to 4.7.0-dev.20220406, see the playground.

Then I was able to bisect this to 7da80d7 introduced by #48112 . I think that the improvement comes from refactoring common parenthesizeMemberOfConditionalType into specialized functions like parenthesizeCheckTypeOfConditionalType & co.

I didn't see any specific test case added/adjusted in this PR that would be specific to this situation so I've decided to add one, cc @rbuckton

@typescript-bot typescript-bot added the For Backlog Bug PRs that fix a backlog bug label Apr 25, 2022
@DanielRosenwasser DanielRosenwasser merged commit 9469f95 into microsoft:main May 4, 2022
@microsoft microsoft locked as resolved and limited conversation to collaborators Oct 22, 2025
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Typescript Quick Info Formatter Removes parentheses () from declared type on hovering, for conditionally inferring types

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