[Bug c++/53333] Initializer lists in std=c++03 mode must be an error

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53333

--- Comment #5 from Marc Glisse <glisse at gcc dot gnu.org> 2012-05-12 21:57:05 UTC ---
(In reply to comment #4)
> For other features of C++11 don't need -pedantic-errors to emit an error.
[...]
> It doesn't seem consistent.
> What is the criteria?

Allowing {} is a rather isolated extension that doesn't interfere much with
anything. Rvalue reference is perhaps the worst example you could pick as it
changes the behavior all over the place and can easily break code. I don't know
if there are official criteria, the choices may be questionable, but I don't
see that it matters that much...