rust2tex.tex

%#!lualatex
\documentclass{article}
\usepackage{xparse}
\usepackage[active,tightpage]{preview}
\setlength\PreviewBorder{2mm}

\ExplSyntaxOn
\NewDocumentCommand { \MakeRustAre } { m }
  {
    \tl_set:Nn \l_tmpa_tl { #1 }
    \regex_replace_all:nnN { Rust } { TeX } \l_tmpa_tl
    \tl_use:N \l_tmpa_tl
  }
\ExplSyntaxOff

\begin{document}

\begin{preview}
\MakeRustAre{Rust is the most loved language.}
\end{preview}

\end{document}
% vim: ft=expl3 nospell: