pe-predicate">predicate</a>(Elem)</tt></li><li><tt>Iterator1 = <a href="#type-iterator">iterator</a>(Elem)</tt></li><li><tt>Iterator2 = <a href="#type-iterator">iterator</a>(Elem)</tt></li></ul></p>
<p> </p>
</div><p>
  Takes elements <code>Elem</code> from <code>Iterator1</code> while <code>Pred(Elem)</code> returns
  true, that is, the function returns the longest prefix of the
  iterator for which all elements satisfy the predicate.</p>

<h3 class="function"><a name="tl-1">tl/1</a></h3>
<div class="spec"