n class="keyword">enum</span> ctor{_null};</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;                <span class="keyword">typedef</span> T value_type;</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;                <span class="keyword">typedef</span> std::size_t size_type;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;                <span class="keyword">typedef</span> tvec3&lt;T, P&gt; col