// 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"(?mix)((?:[ -$&(-[\]-~]|([%'\\])\2)*(%(\d+\$)?[-+\s0#]?(\d+|\*)?(\.\d+)?[bt]?[diuoxXfeEgGcs]+)+(?:(?!(?:[ -$&(-[\]-~]|([%'\\])\7)*(?:%(?:\d+\$)?[-+\s0#]?(?:\d+|\*)?(?:\.\d+)?[bt]?[diuoxXfeEgGcs]+)+)(?:[ -$&(-[\]-~]|([%'\\])\8)*)?)
").unwrap();
let string = "Color %s, we are looking for %%02droids %% number1 %d, number2 %05d, hex %#x, float %5.2f, unsigned value %u.
I wanted to also add the ability to capture \"any printable text characters besides %, ' and \\, unless these characters appear exactly twice\". This needs to be captured both before the initial % and after the conversion character.
any printable character: [ -~]
besides %, ' and \\: (?![\\\\%'])
these characters appear exactly twice: ( §§§§ |'{2}|\\\\{2}|%{2}) (§ = placeholder)
I am having a problem with the \"unless\", that is, getting the negative look-ahead to discard single occurrences but allow double occurrences of the specified characters.
Color %s, number1 %d, number2 %05d, hex %#x, float %5.2f, unsigned value %u.
| | | | | | |";
let substitution = "IMAGE REMOVED FROM CHROME\\r\\n";
// result will be a String with the substituted value
let result = regex.replace_all(string, substitution);
println!("{}", result);
}
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/