9 Aug
2012
9 Aug
'12
8:10 a.m.
On 08/08/2012 23:39, Dave Steffen wrote:
Hi Folks
During a recent bug hunt, we came across the following (Boost 1.49, fusion/adapted/std_tuple/tag_of.hpp):
#include <tuple>
namespace std { template <typename... Elements> class tuple; }
We find this rather puzzling -- why is this here? As far as we can tell, this doesn't do anything.
It forward declares std::tuple so that it can specialize its traits for it. But it really shouldn't do that, since there is no guarantee this declaration is compatible with the standard one.