Hello *,<div><br></div><div>I am wondering if I should expect some uniqueness guarantees on contained element from fusion set or map containers?</div><div><br></div><div><br></div><div>In this example:</div><div><br></div>
<div><div>struct print_value</div><div>{</div><div>  template&lt;class T&gt;</div><div>  void operator()(T&amp; v)const</div><div>  {</div><div>    cout &lt;&lt; typeid(T).name() &lt;&lt; &quot; has value: &quot; &lt;&lt; v &lt;&lt; endl;</div>
<div>  }</div><div>};</div></div><div><br></div><div><div>  boost::fusion::set&lt;int, int, int&gt; s;</div><div>  boost::fusion::for_each(s, print_value());</div></div><div><br></div><div>I get 3 lines - one for each int I put in. I would expect only one line.</div>
<div><br></div><div>What are my expectations for at_key? Which int would it return? Which type is going to be returned after I inserted the same type again? May be the better question would be, is the new type inserted as the head element or at the end of the underlying list?</div>
<div><br></div><div><br></div><div>Many thanks for the anserws?</div><div><br></div><div><br></div><div>With Kind Regards,</div><div>Ovanes</div><div><br></div><div><br></div><div><br></div>