Example
extern crate regex;
use regex::Regex;
fn main() {
let rg = Regex::new(r"was (\d+)").unwrap();
// Regex::captures returns Option<Captures>,
// first element is the full match and others
// are capture groups
match rg.captures("The year was 2016") {
// Access captures groups via Captures::at
// Prints Some("2016")
Some(x) => println!("{:?}", x.at(1)),
None => unreachable!()
}
// Regex::captures also supports named capture groups
let rg_w_named = Regex::new(r"was (?P<year>\d+)").unwrap();
match rg_w_named.captures("The year was 2016") {
// Named capures groups are accessed via Captures::name
// Prints Some("2016")
Some(x) => println!("{:?}", x.name("year")),
None => unreachable!()
}
}
