Implement StringIndex type
koczkatamas opened this issue · comments
Tamás Koczka commented
You cannot index a string with a number in Swift.
Currently we are using a workaround which is really slow (indexing is O(N)
instead of the expected O(1)
) and really ugly (String(str[str.index(str.startIndex, offsetBy: i])
instead of str[i]
).
So we have to introduce a StringIndex type which uses number underlying on every language expect Swift where it maps to String.Index
type. We also need to add some helper methods eg. str.startIndex
which gives 0
usually, except in Swift where it gives str.startIndex
.