// 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>\s*)(?<tag>a|div|p|span|img|button)(?!\s*\[[^\]]*__canvas[^\]]*\])(?=[\:\,\+\~\>\(\)\[\]\{\}\s]+)(?=[^\}\;]*[\{])").unwrap();
let string = "@media only screen and (max-width: 600px) {
div>a[__canvas]:hover,a,div {
background-color: lightblue;
}
i+img>audio,table:not(a+p),
button~.a
,
span{
background-color: lightblue;
}
}
a {
background: url(http://a.b.com);
font-family: cursive, a, serif;
}
img
{
color: a;
font-family: a, serif;
}";
let substitution = "${s}${tag}[__canvas]";
// 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/