Ryan Cavanaugh comments

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                                            Ryan Cavanaugh

TypeScript 5.8 Iteration Plan

@per1234 no offense taken, you're just being a bit abrasive about this. Our release process is subject to security constraints you may not be aware of, and we'd ask that...

Overload call signature resolution resolves to first overload

Overload resolution selects the first matching signature (everyone loves it when language use simple algorithms, right? right??). There have been requests to do something more involved when `any` is involved,...

'identity' modifier to indicate a function's parameter-less returns should be narrowed like a value

Isn't the core problem in this example that `value` is incorrectly declared? If it were ```ts declare const value: (() => string) | (() => undefined); if (value() !== undefined)...

'identity' modifier to indicate a function's parameter-less returns should be narrowed like a value

Also an ELI5 explanation for why it's not correct to write `const v = value();` would be appreciated

'identity' modifier to indicate a function's parameter-less returns should be narrowed like a value

A distributive conditional type would be correct, though you would only be able to narrow a union (`string | number`), not a specific value (if `T` is `string` you still...

'identity' modifier to indicate a function's parameter-less returns should be narrowed like a value

Wait, if the idea is that `get` "always returns the same value", why is there a `set` method in the first place? Doesn't this imply the need for additional syntax...

'identity' modifier to indicate a function's parameter-less returns should be narrowed like a value

> I mean, this violates the spirit of your argument as well: Okay, but it seems extremely nearsighted to ship a new CFA feature that is going to immediately run...

'identity' modifier to indicate a function's parameter-less returns should be narrowed like a value

We discussed offline for a bit and wanted to find a solution that would be a bit more general-purpose and solve this problem more completely. The basic sketch was something...

'identity' modifier to indicate a function's parameter-less returns should be narrowed like a value

Probably a subtlety here is that the modifier is attached to the *containing type's member list* (not the functions themselves) the same way `readonly` or `protected` is. It obviously doesn't...

Revert ts5.9 changes for Uint8Array

Effectively ~all of these errors people are encountering represent problems that really could have induced actual runtime errors. For better or worse we do generally treat "This was not actually...