#![allow(unused)]
use regex::{Captures, Regex};
fn main() {
let re = Regex::new(r"(?P<a1>(?:warning|warn))|(?P<a2>(?:error))|(?P<a3>(?:info))").unwrap();
let caps = re.captures_iter("      warning error info warn");


for cap in caps {
    let text1 = cap.name("a1").map_or("", |m| m.as_str());
    let text2 = cap.name("a2").map_or("", |m| m.as_str());

    println!("**{}**{}**", &text1, &text2);
}
}