// 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)(\n\n)-\s*(?!.*(?:(?<!-)\n-|\n-))").unwrap();
let string = "Here are few example strings where a leading dash character should be removed (note newlines):
- Lovely day.
- Lovely day-night cycle.
- Lovely day.
Isn't it?
- lovely day - isn't it?
- Lovely day -
isn't it?
Here are few example strings where leading dash character(s) should be retained (note the 2nd example, it might be tricky):
- Lovely day.
- Yeah, isn't it?
Lovely day.
- Yeah, isn't it?
- lovely day - isn't it?
- Yes.
- Lovely day for a -
- Walk?
";
let substitution = "$1";
// 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/