// 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#"^(?=(?>[^{}()<>]*\[+[^{}()<>]*\]+[^{}()<>]*)*$|(?>[^[\]()<>]*\{+[^[\]()<>]*\}+[^[\]()<>]*)*$|(?>[^[\]{}<>]*\(+[^[\]{}<>]*\)+[^[\]{}<>]*)*$|(?>[^[\]{}()]*\<+[^[\]{}()]*\>+[^[\]{}()]*)*$|(?>[^[\]{}()<>]*)*$)(?=(?>[^"]*\“+[^"]*\”+[^"]*)*$|(?>[^“”]*\"+[^“”]*\"+[^“”]*)*$|(?>[^"“”]*)*$)(?=(?>[^']*‘+[^']*’+[^']*)*$|(?>[^‘’]*'+[^‘’]*'+[^‘’]*)*$|(?>[^'‘’]*)*$)[A-Za-z0-9 \"“”'‘’()[\]{}<>«»\\\/?!&@£$€¥.,-]{3}[A-Za-z0-9 \"“”'‘’()[\]{}<>«»\\\/?!&@£$€¥.,\-*=#%+]{0,157}$"#).unwrap();
let string = "/^
(?=
(?> [^{}()<>]* \\[+ [^{}()<>]* \\]+ [^{}()<>]* ) *$|
(?> [^[\\]()<>]* \\{+ [^[\\]()<>]* \\}+ [^[\\]()<>]* ) *$|
(?> [^[\\]{}<>]* \\(+ [^[\\]{}<>]* \\)+ [^[\\]{}<>]* ) *$|
(?> [^[\\]{}()]* \\<+ [^[\\]{}()]* \\>+ [^[\\]{}()]* ) *$|
(?> [^[\\]{}()<>]* ) *$
)
(?=
(?> [^\"]* \\“+ [^\"]* \\”+ [^\"]* ) *$|
(?> [^“”]* \\\"+ [^“”]* \\\"+ [^“”]* ) *$|
(?> [^\"“”]* ) *$
)
(?=
(?> [^']* ‘+ [^']* ’+ [^']* ) *$|
(?> [^‘’]* '+ [^‘’]* '+ [^‘’]* ) *$|
(?> [^'‘’]* ) *$
)
[A-Za-z0-9 \\\"“”'‘’()[\\]{}<>«»\\\\\\/?!&@£$€¥.,-]{3}
[A-Za-z0-9 \\\"“”'‘’()[\\]{}<>«»\\\\\\/?!&@£$€¥.,\\-*=#%+]{0,157}
$/";
// 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/