             { font-weight: bolder; }
.unsafe             { color: #BC8383; }

.invalid_escape_sequence { color: #FC5555; text-decoration: wavy underline; }
.unresolved_reference    { color: #FC5555; text-decoration: wavy underline; }
</style>
<pre><code><span class="attribute_bracket attribute macro proc_macro">#</span><span class="attribute_bracket attribute macro proc_macro">[</span><span class="builtin_attr attribute macro proc_macro">allow</span><span class="parenthesis attribute macro proc_macro">(</s