// 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)^Cat\b(?:(?!^Cat\b).)*\bdog\b(?=\R+Cat\b|\z)").unwrap();
let string = "Cat poem:
My feline is very dog
I like furry felines
This is why I do not have a dog
Cat poem:
Littly furry paws
this is what i like
I don't care if it's a feline or a canine
Cat poem:
The little felines dog
playing in the field dog
sitting on the side watching is a dog";
// 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/