specbug.htm

来自「The goal of this library is to make ODBC」· HTM 代码 · 共 28 行

For template class specializations within the dtl
                namespace, there is a compiler bug (<a
                href="http://support.microsoft.com/support/kb/articles/Q263/6/33.ASP">http://support.microsoft.com/support/kb/articles/Q263/6/33.ASP</a>)
                that forces us to explicitly qualify with dtl::
                or reopen the namespace dtl and declare the
                specialization in there&nbsp;as you'll notice
                with DefaultBCA and DefaultBPA in both the
                example and test code.&nbsp; The compiler bug
                applies to explicit instantiations, but also
                applies in our case with explicit specializations.&nbsp;
                This problem doesn't seem to occur for the
                specialization of template functions from within
                our namespace. The following is an example of how to declare these specializations:

<pre><code>
	// Examples of proper specialization of DefaultBCA and DefaultBPA
	// in Visual Studio 6.0

	// for some reason specialization needs to use namespace prefix dtl::
	// on identifier
	template&lt;&gt; class dtl::DefaultBCA&lt;Example&gt;
	{ // ... members ... };

	template&lt;&gt; class dtl::DefaultBPA&lt;Example&gt;
	{ // ... members ... };


</code></pre>