Preserve parameter inference

[prndP]

Hey there. Great library. I've been using it to help speed up converting an old legacy codebase that had a ton of shady as any casting.

One corner case I ran into:

interface SomeInterface {
  setter: (p: number) => number;
  value: number;
}

const test: SomeInterface = fromPartial({ setter: (p) => p + 1 });

Will throw TS7006: Parameter 'p' implicitly has an 'any' type when it could have been inferred.

Adding an inference for the parameter seems to have fixed it without breaking the rest of my tests. Not sure if it will cover all your use cases as well.

Cheers

[mattpocock]

This looks neat - could you add test cases for this?

[mattpocock]

Tests requested in comment above

[prndP]

Tests requested in comment above

Done!

[prndP]

Hey @mattpocock just wondering if you had a chance to look at this one again. No rush, I'm sure you're quite busy