</span><span class="identifier">size_type</span> size<span class="special">)</span><span class="special">;</span></pre>
<p>Preallocates memory from the internal vector. Resets the stream to the first position. Throws if the internals vector's memory allocation throws. </p>
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<pre class="literallayout"><span class="keyword">void</span> <a name="idp57047088-bb"></a><span class="identifier">clear</span><span class="special">(</span><span class="special">)</span><span class="special">;