You could try:<div>        boost::polygon::assign(p3, p1&amp;p2);</div><div><br><div>Or, if you&#39;re using namespace boost::polygon::operators, you could write:</div><div>        p3 = p1;</div><div><pre style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">
</pre>        <span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255); ">p3 &amp;= p2;</span></div><div><font class="Apple-style-span" face="arial, sans-serif"><br>
</font><div class="gmail_quote">2011/10/17 Dimitris Dakopoulos <span dir="ltr">&lt;<a href="mailto:dakopoulos@gmail.com">dakopoulos@gmail.com</a>&gt;</span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hello all,<div>I&#39;m using a custom polygon set (PolygonCollection) according to the guidelines here: <a href="http://www.boost.org/doc/libs/1_47_0/libs/polygon/doc/gtl_custom_polygon_set.htm" target="_blank">http://www.boost.org/doc/libs/1_47_0/libs/polygon/doc/gtl_custom_polygon_set.htm</a></div>


<div>There is one case  that I don&#39;t get any compiler error:</div><div><br></div><div>PolygonCollection p1, p2;</div><div>p1 &amp; p2;</div><div><br></div><div>There is this case that I do have an error:</div><div><br>


</div><div>PolygonCollection p1, p2;</div><div>PolygonCollection p3 = p1 &amp; p2;</div><div><br></div><div>The error is: error: conversion from &#39;boost::polygon::polygon_set_view&lt;PolygonCollection, PolygonCollection, 1&gt;&#39; to non-scalar type &#39;PolygonCollection&#39; requested</div>


<div><br></div><div>There is also this case that I have a compiler error:</div><div><br></div><div>PolygonCollection p1,p2,p3;</div><div>p3 = p1 &amp; p2; </div><div><br></div><div>The error is:error: no match for &#39;operator=&#39; in &#39;p3 = boost::polygon::operators::operator&amp;(const geometry_type_1&amp;, const geometry_type_2&amp;) [with geometry_type_1 = PolygonCollection, geometry_type_2 = PolygonCollection](((const PolygonCollection&amp;)((const PolygonCollection*)(&amp; p1))))&#39;</div>


<div>/xxx/Polygon.hpp:182: note: candidates are: PolygonCollection&amp; PolygonCollection::operator=(const PolygonCollection&amp;)</div><div><br></div><div>(You can notice that I have overloaded the operator= for my custom polygon set but I got the same error without the suggestion before my implementation)</div>


<div><br></div><div>Any ideas are welcomed!</div><div><br></div><font color="#888888"><div>Dimitris</div>
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