[Bug c++/100443] member using declaration of function templates with different return types does not bring base class overload into derived class

[gonzalo.gadeschi at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100443

--- Comment #3 from gnzlbg <gonzalo.gadeschi at gmail dot com> ---
http://eel.is/c++draft/namespace.udecl#11

> The set of declarations named by a using-declarator that inhabits a class C 
> does not include member functions and member function templates of a base 
> class that correspond to (and thus would conflict with) a declaration of a 
> function or function template in C.