utf8Span

Declaration

var utf8Span: UTF8Span { get }

Return Value

A UTF8Span over the code units of this substring.

Discussion

For example, if string has the bridged UTF-16 representation, the following code is accidentally quadratic because of this issue:

for word in string.split(separator: " ") {
    useSpan(word.span)
}

A workaround is to explicitly convert the string into its native UTF-8 representation:

var nativeString = consume string
nativeString.makeContiguousUTF8()
for word in nativeString.split(separator: " ") {
    useSpan(word.span)
}

This second option has linear time complexity, as expected.