http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57283
--- Comment #5 from Lin Yi-Li <record.nctu.cis91 at gmail dot com> ---
(In reply to Jonathan Wakely from comment #4)
> N.B. you can also do it with a nested std::bind expression and
> std::logical_not
>
> std::bind(std::logical_not<int>(),
> std::bind(std::mem_fn(&cls::value), std::placeholders::_1))
>
> in C++14 that means you can provide a working not1 replacement:
>
> template<typename F>
> auto not1(F f)
> {
> return std::bind(std::logical_not<>(), std::bind(f,
> std::placeholders::_1));
> }
I understand the problem of std::mem_fn + member variable now.
Thank you for your explanation.
