// 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"(?m)%([^%.]+)%|(?<!\$)\$(?:\{([^{}]+)\}|([^$.\s]+))").unwrap();
let string = "%ABC%
$ABC.
$ABC$XYZ
To add a bit more to this:
${ABC}
should yield ABC too. (ignore curly braces if present - non capture chars perhaps?).
if you have two successive dollar signs, such as \"$$EFG\", or \"$${EFG}\",
that should not appear in a regex result. (This is where either numbered or named back- references come into play - and the reason I contemplated them as non-capture groups). As I understand it, a group becomes a non-capture group with this syntax (?:).";
// 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/