ption in -Ounchecked builds is a serious
programming error.</p></li></ul>

    <h4>Declaration</h4>    
    <code class="language-swift">func precondition(condition: @autoclosure () -&gt; Bool, _ message: @autoclosure () -&gt; String = default, file: StaticString = default, line: UWord = default)</code>
    
    
</div></div>
</div>
