ons (for example bad arguments) should be handled by calling
            one of the <a class="link" href="../error_handling.html#math_toolkit.error_handling.finding_more_information">policy
            based error handlers</a>.
          </li>
<li class="listitem">
            Calls to standard library functions should be made unqualified (this
            allows argument dependent lookup to find standard library functions for
            user-defined floating point types such as those from <a href="../../.