Method pos

regex/src/re_trait.rs:29–35

Returns the start and end positions of the Nth capture group. Returns `None` if `i` is not a valid capture group or if the capture group did not match anything. The positions returned are *always* byte indices with respect to the original string matched.

(&self, i: usize)

    /// not match anything. The positions returned are *always* byte indices
    /// with respect to the original string matched.
    pub fn pos(&self, i: usize) -> Option<(usize, usize)> {
        let (s, e) = (i * 2, i * 2 + 1);
        match (self.0.get(s), self.0.get(e)) {
            (Some(&Some(s)), Some(&Some(e))) => Some((s, e)),
            _ => None,
        }
    }

    /// Creates an iterator of all the capture group positions in order of
    /// appearance in the regular expression. Positions are byte indices