Question

Suppose I have a C++11 function:

template<class F, class... Args>
void g(F&& f, Args&&... args)
{
    /* ... */

    forward<F>(f)(forward<Args>(args)...);

    /* ... */
}

and I have a class X:

struct X
{
    void h();
}

Is there some way I can pass a call to h on a specific X instance x as parameters f, args through g?

X x = ...;

g(x.h);  // WRONG

Answer 1

Use std::mem_fn:

X x = ...;

g(mem_fn(&X::h), x);