How to make template parameter

Question

How do I create a metafunction that takes any kind of function pointer? In the code below, how do I get rid of \"decltype(&f)\" ?

template 

        

Answer 1

Right now there is unfortunately no good way of doing this.

The standard committee has, however, accepted a proposal that makes this valid code:

template <auto functionPointer>
void runFunc() {
  functionPointer();
}

Compiler support should be coming soon.

Answer 2

You can use this:

template <typename FuncType>
void runFunc(FuncType functionPointer )
{
    functionPointer();
}

runFunc(f);