ass="refsect1">
<a name="idp185303904"></a><h2>Description</h2>
<p>A system that can represent any possible combination of units at the expense of not preserving information about how it was created. Do not create specializations of this template directly. Instead use <code class="computeroutput"><a class="link" href="reduce_unit.html" title="Struct template reduce_unit">reduce_unit</a></code> and <code class="computeroutput"><a class="link" href="base_unit.html" title="Class template base_unit">base_unit</