// 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"(?ms)(lease\s(?P<ip>[0-9\.]+)\s{.+})").unwrap();
let string = "lease 10.31.31.131 {
starts 0 2014/08/31 14:54:11;
ends 0 2014/08/31 15:04:11;
cltt 0 2014/08/31 14:54:11;
binding state active;
next binding state free;
rewind binding state free;
hardware ethernet d0:e7:82:19:8e:ec;
set ddns-rev-name = \"131.31.31.10.in-addr.arpa.\";
set ddns-txt = \"0044522956d8e56b0f40798743a0660994\";
set ddns-fwd-name = \"Chromecast.example.\";
client-hostname \"Chromecast\";
}
lease 10.31.31.133 {
starts 0 2014/08/31 14:54:51;
ends 0 2014/08/31 15:04:51;
cltt 0 2014/08/31 14:54:51;
binding state active;
next binding state free;
rewind binding state free;
hardware ethernet 00:18:0a:22:2f:9f;
uid \"\\001\\000\\030\\012\\\"/\\237\";
set ddns-rev-name = \"133.31.31.10.in-addr.arpa.\";
set ddns-txt = \"31897a4f3a66a2733b86a7cd3b0b0b2923\";
set ddns-fwd-name = \"ap-1-00180a222f9f.example.\";
client-hostname \"ap-1-00180a222f9f\";
}
";
// result will be a tuple containing the start and end indices for the first match in the string
let result = regex.captures(string);
let (start, end) = match result {
Some((s, e)) => (s, e),
None => {
// ...
}
};
println!("{}", &string[start, end]);
}
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/