inity</span><span class="special">()</span></code>
              </p>
            </td>
</tr>
<tr>
<td>
              <p>
                user_error
              </p>
            </td>
<td>
              <p>
                Returns the result of <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">::</span><span class="identifier">policies</span><span class="special">::</span><span class="identifier">user_