rnal <span class="quote">“<span class="quote">cannot happen</span>”</span> error checks in the
    system that <code class="function">elog</code> is still widely used; it is preferred for
    those messages for its notational simplicity.
   </p><p>
    Advice about writing good error messages can be found in
    <a class="xref" href="error-style-guide.html" title="56.3. Error Message Style Guide">Section 56.3</a>.
   </p><div class="footnotes"><br /><hr style="width:100; text-align:left;margin-left: 0