// include the latest version of the regex crate in your Cargo.toml
extern crate regex;
use regex::Regex;
fn main() {
let regex = Regex::new(r"(?m)^(?=^(?:(\d\d(?:[02468][048]|[13579][26]))-02-29|\d{4}-(?:0[13578]|1[02])-31|\d{4}-(?:0[13-9]|1[0-2])-30|\d{4}-(?:0[1-9]|1[0-2])-(?:0[1-9]|1\d|2[0-8])))(\d{4})-(\d\d?)-(\d\d?)(?:\x20(\d{2}):(\d{2})(?::(\d{2})(.\d+)?)?)?$").unwrap();
let string = "This captures the year, month and day of a date at the 2nd, 3rd and 4th groups.
Also captures leap years in day 29 of February in 1st capturing group.
2014-05-31
2016-02-29
2004-08-10 13:02
2002-02-08 19:35:00
1999-12-31 23:59:59.999
1996-02-29 23:59:59.9999
Regex used: ^(?=^(?:(\\d\\d(?:[02468][048]|[13579][26]))-02-29|\\d{4}-(?:0[13578]|1[02])-31|\\d{4}-(?:0[13-9]|1[0-2])-30|\\d{4}-(?:0[1-9]|1[0-2])-(?:0[1-9]|1\\d|2[0-8]))$)(\\d{4})-(\\d\\d?)-(\\d\\d?)$";
// result will be an iterator over tuples containing the start and end indices for each match in the string
let result = regex.captures_iter(string);
for mat in result {
println!("{:?}", mat);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Rust, please visit: https://docs.rs/regex/latest/regex/