esents <code class="computeroutput"><span class="identifier">NaN</span></code>
        on a platform that lacks NaN, then the fail bit of the stream is set.
      </p>
<h5>
<a name="math_toolkit.fp_facets.reference.h2"></a>
        <span class="phrase"><a name="math_toolkit.fp_facets.reference.flags"></a></span><a class="link" href="reference.html#math_toolkit.fp_facets.reference.flags">Flags</a>
      </h5>
<p>
        The constructors for <code class="computeroutput"><span class="identifier">nonfinite_num