alization trait is set to "track_never". The following
will compile without problem:

<code style="white-space: normal"><pre>
const T t
ar &lt;&lt; t;
</pre></code>

Likewise, the following code will trap at compile time:

<code style="white-space: normal"><pre>
T * t;
ar >> t;
</pre></code>

if the tracking_level serialization trait is set to "track_never".
<p>

The following case illustrates the function of this message.
It was originally used as an example in the
mailing list by Peter Dimov.

<code style