><pre class='rust rust-example-rendered'>
<span class='attribute'>#<span class='op'>!</span>[<span class='ident'>feature</span>(<span class='ident'>test</span>)]</span>

<span class='kw'>extern</span> <span class='kw'>crate</span> <span class='ident'>test</span>;

<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>add_two</span>(<span class='ident'>a</span>: <span class='ident'>i32</span>) <span class='op'>-&gt;</span> <span class='ident'>i32</span> {
    <span class='ident'>a</span>