an> <span class="identifier">str</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>            <span class="comment">// will print 'boost'</span>

<span class="keyword">double</span> <span class="identifier">d</span><span class="special">;</span>
<span class="identifier">test_parser_attr</span><span class="special">(</span><span class="string">""</span><span class="special">,</span>