lethal chasm
I'm writing a lexer currently, and it can possibly error in a few areas, so I'm returning an iterator of results with the token and a lex error: Iterator(Result(Token, LexErr))
What would be the best way to convert that to a type of Result(Iterator(Token), LexErr)? I was trying to figure out how to use something like iterator.fold_until but I think I might be missing something.
fiery nest
result.all from the stdlib changes from List(Result(a, b)) into Result(List(a), b)
cyan rampart
I don't think you can without iterating over the whole thing and iterators are usually used when you want to avoid doing that. you probably want to convert the iterator to a list (iterator.to_list) and then use the function naomi mentioned to invert the types.
more concretely, you can't return an Ok until you evaluate every element in the iterator to verify that it's not an Error.