n class="identifier">coordinate_system</span><span class="special">&lt;</span><span class="identifier">QPoint</span><span class="special">&gt;</span>
            <span class="special">{</span> <span class="keyword">typedef</span> <span class="identifier">cs</span><span class="special">::</span><span class="identifier">cartesian</span> <span class="identifier">type</span><span class="special">;</span> <span class="special">};</span>

            <span class="keyword">template</span><span class="special">&lt;