Classes are types, so they can be aliased with typedef and using (in C++11).
Functions are much more like objects, so there's no mechanism to alias them. At best you could use function pointers or function references:
void (*g)() = &bar::f;
void (&h)() = bar::f;
g();
h();
In the same vein, there's no mechanism for aliasing variables (short of through pointers or references).
