Sensationalist title, the actual behavior described in the issue this links to is: Rust language doesn't offer lookaround regex features This is due to the

Sensationalist title, the actual behavior described in the issue this links to is: Rust language doesn't offer lookaround regex features This is due to the standard library regex implementation not supporting lookaround, not the language itself. Other crates, such as fancy-regex [1] do support this via backtracking. 1. https://github.com/fancy-regex/fancy-regex https://github.com/fancy-regex/fancy-regex