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Allow multiple twoslash assertions on one line? #139

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danvk opened this issue Sep 8, 2023 · 0 comments

Owner

danvk commented Sep 8, 2023

Should something this be allowed?

function callWithRandomNumbers(fn: (n1: number, n2: number) => void) {
  fn(Math.random(), Math.random());
}

callWithRandomNumbers((a, b) => {
  //                   ^? (parameter) a: number
  //                      ^? (parameter) b: number
  console.log(a + b);
});

This isn't supported in TwoSlash:

But I do support an equivalent for errors.

The workaround now is to put the second type assertion on another line:

function callWithRandomNumbers(fn: (n1: number, n2: number) => void) {
  fn(Math.random(), Math.random());
}

callWithRandomNumbers((a, b) => {
  //                   ^? (parameter) a: number
  console.log(a + b);
  //              ^? (parameter) b: number
});

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