// 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"(?:\bfrom\b(?:\s*#\w+(?:\s*\w+))*+|(?!^)\G),?\s*\K(?!(?:\w+ )?\bwhere\b)([\w ]+)(?=[^w]*(?:\bw(?!here\b)[^w]*)*\bwhere\b)").unwrap();
let string = "select ... from course
where ...
select ... from course c, marks s
where ....
select ... from #prefix#course c, marks m
where ...
select ... from #prefix#course c
where id = (select ... from student s where ...)";
// 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/