 platforms
        cannot even input parse their own output! So 'route-tripping' or loopback
        of output to input is not possible. For instance, the following test fails
        with MSVC:
      </p>
<pre class="programlisting"><span class="identifier">stringstream</span> <span class="identifier">ss</span><span class="special">;</span>
<span class="keyword">double</span> <span class="identifier">inf</span> <span class="special">=</span> <span class="identifier">numeric_limits</span><span class="specia