Sapphire - Imagine a framework•2y ago

Typing the Err generic of Result to be empty

Sorry if this is a basic Typescript question! Is it possible to type a function's output so that I can return Result.err() without any parameters? f.e.

function myFunction(): Result<true, ???> {
  if (condition)
    return Result.ok(true)
  else
    return Result.err()
}

function myFunction(): Result<true, ???> {
  if (condition)
    return Result.ok(true)
  else
    return Result.err()
}

Solution:

unknown, you can see Result.err() returns Result<unknown> (https://github.com/sapphiredev/utilities/blob/cc78f17390c7f3db08af92bf46a5a70a9c11dd5f/packages/result/src/lib/Result/Err.ts#L187-L202)

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2 Replies

Solution

kyra•2y ago

piemot•2y ago

thanks 💜

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Typing the Err generic of Result to be empty