>REGEX MATCHALL</a> &lt;match-regex&gt; &lt;out-var&gt; &lt;input&gt;...)
  string(<a class="reference internal" href="#regex-replace">REGEX REPLACE</a> &lt;match-regex&gt; &lt;replace-expr&gt; &lt;out-var&gt; &lt;input&gt;...)

<a class="reference internal" href="#manipulation">Manipulation</a>
  string(<a class="reference internal" href="#append">APPEND</a> &lt;string-var&gt; [&lt;input&gt;...])
  string(<a class="reference internal" href="#prepend">PREPEND</a> &lt;string-var&gt; [&lt;input&gt;...])
  str