[Bug libstdc++/53648] [C++11] nested empty tuples

[chesstr at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53648

--- Comment #4 from chesstr at hotmail dot com 2012-06-12 18:03:56 UTC ---
(In reply to comment #3)
> There are other cases involving non-empty tuples that will still result in an
> ambiguity e.g.
> 
> struct A { };
> auto d = tuple<tuple<tuple<A, A>, A>, A>{};
> 
> My solution avoids using the EBO for some condition I don't remember (the
> code's on another machine) but it handles all the cases I tested.
> 
> I also preserve the property that sizeof(tuple<char, tuple<>>)==1, which I
> think your suggestion loses.

You are right, the suggestion does not solve the real problem at all. Nice
example.