Boost C++ Libraries: Ticket #9386: Compilation error with polygon and multi_array

anonymous — Wed, 13 Nov 2013 18:55:09 GMT

The compilation error is:

/usr/local/include/boost/polygon/polygon_traits.hpp:1429:26: error: no match for call to ‘(boost::multi_array_types::extent_gen {aka boost::detail::multi_array::extent_gen<0ul>}) (boost::polygon::rectangle_data<int>&, const boost::polygon::polygon_45_with_holes_data<int>&)’

owner, status changed

Andrii Sydorchuk — Mon, 18 Nov 2013 23:05:36 GMT

owner changed from Lucanus Simonson to Andrii Sydorchuk
status new → assigned

Andrii Sydorchuk — Mon, 18 Nov 2013 23:23:37 GMT

The problem here is with ADL (argument dependent lookup). The issues is explained with an example here: http://stackoverflow.com/questions/2958648/what-are-the-pitfalls-of-adl. From what I understood, there is no way to fix this permanently, as I can not rename the Boost.Polygon method because it's part of the public interface. The possible solution will be to use the following directive at the top of your file: #define BOOST_MULTI_ARRAY_NO_GENERATORS 1

status changed; resolution set

Andrii Sydorchuk — Mon, 18 Nov 2013 23:31:35 GMT

status assigned → closed
resolution → wontfix

I am marking the issue as "wontfix", as it requires the changes to the C++ standard. Here is some additional reading from Dave Abrahams: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3490.html

status, milestone changed; resolution deleted

Andrii Sydorchuk — Tue, 19 Nov 2013 23:56:03 GMT

status closed → reopened
resolution wontfix
milestone To Be Determined → Boost 1.56.0

I've found the way to fix the issue by changing the order of method definitions inside the Polygon library. Please use the attached patch.

attachment set

Andrii Sydorchuk — Tue, 19 Nov 2013 23:56:43 GMT

attachment → 9386.diff

status changed; resolution set

Andrii Sydorchuk — Tue, 19 Nov 2013 23:59:34 GMT

status reopened → closed
resolution → fixed