// 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#"(?sx)(?(DEFINE)
(?# var )
(?<var>[a-zA-Z_\x7f-\xff][\w\x7f-\xff]*)
(?# val )
(?<val>(?&call)|(?&str)|(?&num)|(?&bool))
(?<call>\$\{CALL\s+[a-zA-Z_\x7f-\xff][\w\x7f-\xff]*\s*\})
(?<str>"[^"]*"|'[^']*')
(?<num>\d+)
(?<bool>(?i)(?:false|true)(?-i))
)
((?(?=no(?8)\S)no|yes))
(\${(?P<type>VAR)\s+((?&var))\s*\=\s*((?&val))\s*\})(\S)?"#).unwrap();
let string = "
${VAR foo=\"What\"}x
${VAR foo=\"What\"}
yes${VAR foo=\"What\"}
no${VAR foo=\"What\"}x
";
// 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/