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Title: Conditional type simplifications & Globally cached conditional type instances by weswigham · Pull Request #29437 · microsoft/TypeScript · GitHub

Open Graph Title: Conditional type simplifications & Globally cached conditional type instances by weswigham · Pull Request #29437 · microsoft/TypeScript

X Title: Conditional type simplifications & Globally cached conditional type instances by weswigham · Pull Request #29437 · microsoft/TypeScript

Description: TypeScript is a superset of JavaScript that compiles to clean JavaScript output. - Conditional type simplifications & Globally cached conditional type instances by weswigham · Pull Request #29437 · microsoft/TypeScript

Open Graph Description: Fixes #28748 Conditional types of the form T extends U ? T : never simplify to T & U if T always extends U, and never if T can never extend U. Conditional types of the form T extends U ? never ...

X Description: Fixes #28748 Conditional types of the form T extends U ? T : never simplify to T & U if T always extends U, and never if T can never extend U. Conditional types of the form T extends U ? ne...

Opengraph URL: https://github.com/microsoft/TypeScript/pull/29437

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og:image:altFixes #28748 Conditional types of the form T extends U ? T : never simplify to T & U if T always extends U, and never if T can never extend U. Conditional types of the form T extends U ? never ...
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unify true branch constraint generation logic and true branch simplif…https://github.com/microsoft/TypeScript/pull/29437/commits/5dc678950355f46d7ee6399ebc5dba1fd1808d19
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Conditional Types: Type parameters with unknown constraint are not the most restrictive type when relating from any. #29674 https://github.com/microsoft/TypeScript/issues/29674
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