">mpl</span><span class="special">::</span><span class="identifier">identity</span><span class="special">&lt;</span> <span class="identifier">DataSet1</span> <span class="special">&gt;</span><span class="special">,</span> <a class="link" href="../../../../../boost/unit_test/data/result_of/make.html" title="Struct template make">data::result_of::make</a><span class="special">&lt;</span> <span class="identifier">DataSet2</span> <span class="special">&gt;</span> <span class="special">&gt;&gt;</span><span class