// 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"(?x)(?<sub_all>
(?:
(?<!\\)\~
(?<sub_text>
(?>\\[\~[:blank:]\h]|[^\~[:blank:]\h\v])*+
)
(?<!\\)\~
)
|
(?: # or the Microsoft way. Beurk
\<sub\>
(?<sub_text>
((?!\v).)+
)
\<\/sub\>
)
)").unwrap();
let string = "log~10~100 is 2.
Space is not allowed:
P~a cat~
But it's ok if it is escaped
P~a\\ cat~
Line break is a no-no, even escaped
P~a\\
cat~
Hmm <sub>This is a Microsoft subscript!</sub>
H~2~0
text~a\\ superscript~
";
// 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/