/span> string <span>&#45;&gt;</span> bool</code></dt><dt class="spec value" id="val-(&amp;+)"><a href="#val-(&amp;+)" class="anchor"></a><code><span class="keyword">val</span> (&amp;+) : <span><span>(<span class="type-var">'context</span>, <span class="type-var">'f_in</span>, <span class="type-var">'f_interm</span>, <a href="../index.html#type-accept_more">accept_more</a>, <span class="type-var">'arg_payload</span>)</span> <a href="../index.html#type-templ_matcher">templ_matcher</a></span> <span>&#45;&g