span><span class="identifier">value</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> 
        <a name="boost.unit_test.data.for_each_sampl_idp28551824"></a><span class="identifier">for_each_sample</span><span class="special">(</span><span class="identifier">DataSet</span> <span class="special">&amp;&amp;</span> samples<span class="special">,</span> <span class="identifier">Action</span>