Ryan Cavanaugh

icon company Microsoft icon location Seattle, WA icon location Development lead for the TypeScript team at Microsoft.

Results 449 comments of Ryan Cavanaugh
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4.5 nightly nodenext does not allow top-level await (anymore?)

@rbuckton this looks like something we'll need to patch

4.5 nightly nodenext does not allow top-level await (anymore?)

Oops, I misread the version being tested

[feature] class properties that are "readonly in public, writable in private" or other permutations

Previously at #2845 but we should revisit after so long

Allow non returning functions to have contextually required `undefined` return type

I like this idea 👍

Allow non returning functions to have contextually required `undefined` return type

@ljwagerfield it sounds like you should turn on the `noImplicitReturns` flag, which does exactly that?

Module "..." cannot be named without a reference to "..." error when decl emitting references to nested modules

> Would it be possible to get some insight from language designers on what this is trying to protect us from You get this error any time the declaration emitter...

Suggestion: Provide a way to force simplification/normalization of conditional and mapped types

This (at time of writing) works: ```ts type Expand = T extends unknown ? { [K in keyof T]: T[K] } : never; type Out = Expand; ```

Suggestion: Provide a way to force simplification/normalization of conditional and mapped types

We don't provide any guarantees on "type representation". It's sometimes necessary to change the simplification rules (in either direction) for performance or correctness reasons.

Array.isArray type narrows to any[] for ReadonlyArray<T>

> Barring some unforeseen consequence I have incredibly bad news... 😅. Every time we touch this thing something breaks. Happy to take a PR to try, though.

index signature is missing when do object destructuring to separate variable

This behavior falls out of the inference rules and it's not clear to me which one could be changed given the current type mechanics available. `runtimeInitialVariable_2 ` would have need...