span class="special">::</span><a class="link" href="vector.html" title="Class template vector">boost::compute::vector</a><span class="special">&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special">&lt;</span> <span class="identifier">Key</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&gt;</span> <a name="boost.compute.flat_map.vector_type"></a><spa