Mathias Gaunard wrote:
Finally, about the operator overloading for set operations, I would like to be able to avoid pushing the namespace in the global one if possible. I think it would be nice to have a "ref" function or something that would make objects just behave like a reference to the original object but within the right namespace so that the operators get picked up by ADL. Functions that would return expression templates like discussed above could also make their return type in the right namespace so that it gets picked up by ADL too.
I almost forgot, there is actually a better answer to your question. The operators in the operators namespace are an optional feature of the library. You can instead use the polygon_set_data objects to perform explicit conversions and use the member operators of the polygon_set_data classes. polygon_set_data<int>(some_polygon) | polygon_set_data<int>(some_rectangle); Since operator| is in this case a member function it is found first though ADL. Luke