Boost C++ Libraries: Ticket #12427: Boost Spirit: call of 'swap' is ambiguous

hannes@… — Sat, 03 Sep 2016 16:50:08 GMT

Since there is no reaction, I suppose that my given information is a little sparse?

I investigated a bit:

The definition of "boost::fusion::swap" arises due to the inclusion of "/usr/include/boost/spirit/include/qi.hpp"

The definition of "boost::swap" comes via "/usr/include/boost/assign/list_of.hpp" Unfortunately, I need the "list_of" header in many places.

I have removed all "using namespace" statements. Unfortunately without success.

attachment set

hannes@… — Sat, 03 Sep 2016 17:41:04 GMT

Minimum example

hannes@… — Sat, 03 Sep 2016 17:41:48 GMT

I managed to reduce my code into a demonstration minimum. You can find it in the attached file "test.cpp".

Compiling it on Ubuntu Xenial via

$ g++ test.cpp

fails with the described error.

Joel de Guzman — Sat, 03 Sep 2016 22:33:42 GMT

I confirmed this and I can repro on Clang.

Joel de Guzman — Sat, 03 Sep 2016 22:45:48 GMT

One plausible solution here is to use boost::swap and have fusion provide an overload for it.

hannes@… — Mon, 03 Oct 2016 18:02:44 GMT

I could compile the minimum example after inserting

namespace boost {
namespace fusion {
 void swap(MyList&a1, MyList&a2)
 {
  boost:swap(a1, a2);
 }
}
}

Joel de Guzman — Sat, 24 Nov 2018 05:05:52 GMT

fixed in boost-1.65 (not a spirit bug)

Joel de Guzman — Sat, 24 Nov 2018 05:06:05 GMT