This package expands tex's listings to highlight Rust keywords.
Copy content to your .tex file
If you want to use by default of listings, you should mv these files to /path/to/listings and overwrite listings.cfg like below.
\def\lstlanguagefiles
{lstlang0.sty,lstlang1.sty,lstlang2.sty,lstlang3.sty,lstlang4.sty} % add lstlang4.sty!