Function take_while

src/parse.rs:37–47

(s: &str, mut predicate: P)

}

fn take_while<P>(s: &str, mut predicate: P) -> &str
where
    P: FnMut(char) -> bool,
{
    let offset = s
        .chars()
        .take_while(|ch| predicate(*ch))
        .map(|ch| ch.len_utf8())
        .sum();
    &s[..offset]
}

fn skip_while<P>(s: &str, mut predicate: P) -> &str
where