Function pick

std/re/src/lib.rs:157–159

(f: &Found, ngroups: usize)

    }

    fn pick(f: &Found, ngroups: usize) -> String {
        if ngroups == 1 { f.groups[0].clone().unwrap_or_default() } else { f.text.clone() }
    }

    /* match: anchored at the start. Hand written export since `match` is a keyword. */
    #[unsafe(no_mangle)]