3 ms·

This is actually more similar to what is going on above: function ok_or<T>(x: T | null, msg: string): T | Error { if (x === null) return new Error(msg);

This is actually more similar to what is going on above: function ok_or<T>(x: T | null, msg: string): T | Error { if (x === null) return new Error(msg); return x; } Thrown values (or exceptions if you like that term) are very much not type-safe in TypeScript.

moonchild 6y ago
Does TS have syntax sugar for returning errors, as rust has? If not, I don't see what's interesting about your form.
- frenchy 6y ago
  Sorry for the late reply. It does not. My point was mostly that the TypeScript analogs are either more of a pain or less type safe.