// 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"(?x)(?(DEFINE)(?<cons>\b(?:
(?<x>\d*)
(?:(?<a0>0)|(?<a1>1)|(?<a2>2)|(?<a3>3)|(?<a4>4)
|(?<a5>5)|(?<a6>6)|(?<a7>7)|(?<a8>8))
(?:9(?= 9*,\g{x}\d (?<y>\g{y}?+ 0)))*
,\g{x}
(?(a0)1)(?(a1)2)(?(a2)3)(?(a3)4)(?(a4)5)
(?(a5)6)(?(a6)7)(?(a7)8)(?(a8)9)
(?(y)\g{y})
# handle the 999 => 1000 case separately
| (?:9(?= 9*,1 (?<z>\g{z}?+ 0)))+
,1\g{z}
)\b))
# list of two or more consecutive integers
(?=(?&cons))\d+
(?:,(?=(?&cons))\d+)*
,\d+").unwrap();
let string = "0,1,2,3
8,9,10,11
1999,2000,2001
99,100,101
42
3,2,1
1,2,4
10,11,13";
// 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/