><code><span class="keyword">val</span> (~+) : <span>(<span class="type-var">'context</span> <span>&#45;&gt;</span> string <span>&#45;&gt;</span> bool)</span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'context</span>, <span class="type-var">'f</span>, <span class="type-var">'f</span>, <span class="type-var">'arg_payload</span>)</span> <a href="../index.html#type-name_matcher">name_matcher</a></span></code></dt><dd><p>Starts a path with a matching name that satisfies the given function</p