I read it the same way. There&#x27;s an open issue for it:<p><a href="https:&#x2F;&#x2F;github.com&#x2F;rust-lang&#x2F;rfcs&#x2F;issues&#x2F;372" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;rust-lang&#x2F;rfcs&#x2F;issues&#x2F;372</a><p>I think one of the main reasons this isn&#x27;t done is because of the grammar issue. I dimly remember that one of the goals of Rust was to be parseable with a LL(1) grammar.