Pack</span>s actually lie at the heart of
everything this library does; in this section we'll examine ways to
build and manipulate them more effectively.</p>
<div class="section" id="building-argumentpacks">
<h3>3.2.1&nbsp;&nbsp;&nbsp;Building <span class="concept">ArgumentPack</span>s</h3>
<p>The simplest <span class="concept">ArgumentPack</span> is the result of assigning into a
keyword object:</p>
<pre class="literal-block">
BOOST_PARAMETER_NAME(index)

template &lt;class ArgumentPack&gt;
int print_index