v>
<div class="section" id="semantics-pointer-container-requirements">
<span id="pointer-container-requirements"></span><h2>Semantics: pointer container requirements</h2>
<ul>
<li><p class="first"><tt class="docutils literal">auto_type replace( size_type idx, T* x );</tt></p>
<blockquote>
<ul class="simple">
<li>Requirements: `` x != 0 and idx &lt; size()``</li>
<li>Effects: returns the object indexed by <tt class="docutils literal">idx</tt> and replaces it with <tt class="docutils literal">x</tt>.</li>
<li