Hi Joaquin,<br><br>does this mean that if the zeroth index is unordered or ordered but
non-unique you could have a false negative in the equality test due to elements ordering being undefined?<br><br>Regards,<br><br>&nbsp; Francesco.<br><br><div class="gmail_quote">On Fri, May 9, 2008 at 6:53 PM, JOAQUIN M. LOPEZ MUÑOZ &lt;<a href="mailto:joaquin@tid.es">joaquin@tid.es</a>&gt; wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">




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<div dir="ltr"><font color="#000000" face="Tahoma" size="2">Hi Ted,</font></div>
<div dir="ltr"><font face="tahoma" size="2"></font>&nbsp;</div>
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<font face="Tahoma" size="2"><b>De:</b> <a href="mailto:boost-users-bounces@lists.boost.org" target="_blank">boost-users-bounces@lists.boost.org</a> [<a href="mailto:boost-users-bounces@lists.boost.org" target="_blank">boost-users-bounces@lists.boost.org</a>] En nombre de Ted Pederson [<a href="mailto:ted.pederson@gmail.com" target="_blank">ted.pederson@gmail.com</a>]<br>

<b>Enviado el:</b> viernes, 09 de mayo de 2008 18:03<br>
<b>Para:</b> <a href="mailto:boost-users@lists.boost.org" target="_blank">boost-users@lists.boost.org</a><br>
<b>Asunto:</b> [Boost-users] testing for multi_index equality<br>
</font>&gt;<br>
</div><div class="Ih2E3d">
<div></div>
<div>&gt;Is there an easy way to test two multi_index containers for equality, c1 == c2?</div>
<div><font face="times new roman"></font>&nbsp;</div>
</div><div><font face="times new roman">c1 == c2 is defined to be equivalent to c1.get&lt;0&gt;()==c2.get&lt;0&gt;(), which</font></div>
<div><font face="times new roman">is defined if the first index of the container is of type ordered, sequenced or</font></div>
<div><font face="times new roman">random access; in all these cases the expression is in fact equivalent to</font></div>
<div><font face="times new roman"></font>&nbsp;</div>
<div><font face="times new roman">&nbsp; c1.size()==c2.size()&amp;&amp;std::equal(c1.begin(),c1.end(),c2.begin());</font></div>
<div><font face="times new roman"></font>&nbsp;</div>
<div><font face="times new roman">Is this not what you had in mind?</font></div>
<div><font face="times new roman"></font>&nbsp;</div>
<div><font face="times new roman">Joaquín M López Muñoz</font></div>
<div><font face="times new roman">Telefónica, Investigación y Desarrollo</font></div>
</div>

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