<a name="l00069"></a><span class="lineno">   69</span>&#160;</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;        <span class="comment">// -- Conversion constructors --</span></div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;        template&lt;typename U, qualifier P&gt;</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;