[Bug libstdc++/52114] SFINAE out the rvalue iostream operators to give better error messages

[b.r.longbons at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52114

--- Comment #5 from Ben Longbons <b.r.longbons at gmail dot com> 2012-02-04 
22:36:54 UTC ---
(In reply to comment #2)
> Yesterday I was wondering: is there something in C++11 saying explicitly that
> these tricks are allowed,
In N3242, 14.8.2/{7,8}