// 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"(\[expr\s+)([^}][^\]]*)(\])").unwrap();
let string = "set a [expr $sumy+1]
set b [[expr $sumy+1] [expr $sumy+2] [expr $sumy+3]]
set c [expr $sumy+[lindex $coords 1]]
set d [expr [lindex [$ret] 2] + $Alpha]
set e [string range $SECNAME 0 [expr [string first - $SECNAME] -1] ]
(\\[expr\\s+)([^}][^\\]]*)(\\])
";
// 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/