// 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)<<<([A-Za-z_]\w*)(?:\R(?!\1;\R).*)*\R(?:\R(?!\1;\R).*)*\R\1;\R").unwrap();
let string = "<<<([A-Z]+)\\n.*\\n\\n.*\\n *\\1\\b
This works if there is only one HEREDOC of that type in the file, but if there were more than one it'll look at the code between the HEREDOCs.
<<<([A-Z]+)\\n(?!.*\\1.*).*\\n\\n(?!.*\\1.*).*\\n *\\1\\b
With negative lookaheads should then work... but it doesn't match at all :-(
I think I can't use negative look-behinds cause it would not contain a fixed length.
$out .= <<<HTML
aaaaa
aaaaa
bbbbb
HTML;
// Shouldn't match, cause the empty line is outside the HEREDOC
$out .= <<<HTML
aaaaa
aaaaa
bbbbb
HTML;
$out .= <<<HTML
Should match, cause it has a empty line in the HEREDOC
aaaaa
bbbbb
HTML;
";
// 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/