s</span><span class="macro">!</span> <span class="ident">sp</span> (
  (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">expr</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">args</span>:<span class="ident">tt</span>)<span class="kw-2">*</span>) <span class="op">=&gt;</span> (
    {
      <span class="kw">use</span> <span class="ident">nom</span>::<span class="ident">Convert</span>;
      <span class="kw">use</span> <span c