ent given in the call to <code>lpeg.match</code>.
</p>


<h3><a name="cap-b"></a><code>lpeg.Cb (name)</code></h3>
<p>
Creates a <em>back capture</em>.
This pattern matches the empty string and
produces the values produced by the <em>most recent</em>
<a href="#cap-g">group capture</a> named <code>name</code>.
</p>

<p>
<em>Most recent</em> means the last
<em>complete</em>
<em>outermost</em>
group capture with the given name.
A <em>Complete</em> capture means that the entire pattern
corresponding to the captu