[Bug libstdc++/56193] ios_base should replace operator void* with explicit operator bool in C++11 onwards.

[daniel.kruegler at googlemail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56193

--- Comment #10 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
(In reply to Jonathan Wakely from comment #9)
Yes, sure.