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Title: Defer types like `keyof (T & {})` by ahejlsberg · Pull Request #49696 · microsoft/TypeScript · GitHub

Open Graph Title: Defer types like `keyof (T & {})` by ahejlsberg · Pull Request #49696 · microsoft/TypeScript

X Title: Defer types like `keyof (T & {})` by ahejlsberg · Pull Request #49696 · microsoft/TypeScript

Description: TypeScript is a superset of JavaScript that compiles to clean JavaScript output. - Defer types like `keyof (T & {})` by ahejlsberg · Pull Request #49696 · microsoft/TypeScript

Open Graph Description: Ordinarily, types of the form keyof (A & B) are normalized to keyof A | keyof B. However, for types like keyof (T & {}), this becomes keyof T | keyof {}, which becomes just keyof T, losing ...

X Description: Ordinarily, types of the form keyof (A & B) are normalized to keyof A | keyof B. However, for types like keyof (T & {}), this becomes keyof T | keyof {}, which becomes just keyof T,...

Opengraph URL: https://github.com/microsoft/TypeScript/pull/49696

X: @github

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Domain: github.com

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Fixed an issue with unsound indexed access on unknown type param #49729 https://github.com/microsoft/TypeScript/pull/49729
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same behavior in 4.7https://www.typescriptlang.org/play?ts=4.7.4#code/GYVwdgxgLglg9mABMYBGAPAFQHwAooBcimANIgNZHkCmAnnMMQJSIDeAsAFCI+JQDa5ALoBuLgF8uXUJFgJkwAExY8hRADkE6kABsdAQwBGO6irKUKdBszZdefQaIlTOM6PCQoAzCvxFSFFRWjJpg2npGJiosHNy8AsIiPAD0yYgAogBOmXCZzpzS4O7yKAAsvmqh4QbGpjjmQfQhWro1UTgxdvGOYpySBa5ouGCtZADkwHBwY0y9KIrDo4gTUzNzwF6LeuOT07PSwKVbOjur+wNAA
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Improve generic keyof relationship checking for generic conditionals with keyless branch types #49563 https://github.com/microsoft/TypeScript/pull/49563
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Emtpy interface reduced to never in nested generic function #49536 https://github.com/microsoft/TypeScript/issues/49536
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Add tests for inferring contextual generic mapped types #52709 https://github.com/microsoft/TypeScript/pull/52709
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"cannot be used to index type" error when indexing NonNullable of a generic type in typescript 4.8 https://github.com/microsoft/TypeScript/issues/49681
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