CODEWITHSUNDEEP
c++functionclasspointers
ThefrenchSpeedruns
ThefrenchSpeedruns

Reputation: 113

C++ pointer to object's class member

I have a class with an array inside. Inside of this array, I want to put a function pointer to a function which has the same-this pointer as my insance.

class Foo {
   std::vector <void (*baz)> bar;
   void baz () {};
}

Foo bundy;
bundy.bar.push_back (/*???*/);

How can this be done? I suppose, when I run it like &Foo::baz(), baz has no (valid) this pointer or doesn't point to the instance.

What could be good workarounds?

Upvotes: 1

Views: 47

Answers (1)

tobspr
tobspr

Reputation: 8386

Instead of storing a pointer to *baz, you could store an std::function<void()>.

Then you could store a lambda with a bound instance:

Foo bundy;
bundy.bar.push_back([&bundy](){ bundy.baz(); });

Your class would then look like this:

class Foo {
  public:
    std::vector<std::function<void()>> bar;
    void baz() {};
};

Upvotes: 4

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