如何在C ++中将函数数组公开为类成员？

Question

I have to expose an array of functions in my application. These functions are actually methods of that class and I will populate the array in the constructor. For instance:

void Cpu::print() { // some func
    std:cout << "hi";
}

void Cpu::Cpu() { // class ctor
  funcArray = { &Cpu::print }
}

Then I want to do this:

Cpu myCpu;
(myCpu.*funcArray[0])();

All my functions will follow the same signature "void ()".

Is that possible?

Answer 1

You cannot assign to arrays, but you can use initialiser lists:

class Cpu {
public:
    typedef void (Cpu::*Func)();

    ...

    Func funcArray[CONSTANT];
};

Cpu::Cpu() : funcArray({ &Cpu::print }) {
    // the rest of the array is filled with NULL pointers
}

Then

Cpu cpu;

(cpu.*(cpu.funcArray[0]))();