I’m trying to pass a parameter along with a function pointer.

Currently I have this code that works, but I wanted to refactor it to avoid creating footprints(?) for the doUserAnimation calls.

#include <string>
#include <iostream>

typedef void (*AnimationFunction) ();

int gDefaultAnimationCount = 0;

struct LedAnimationArray 
{
    std::string name;
    AnimationFunction function;
};

void A_AllDark()
{
    std::cout << "BuiltInAllDark";
    std::cout << 'n';
}

void A_AllLight()
{
    std::cout << "BuiltInAllLight";
    std::cout << 'n';
}

void doUserAnimation(int animationNumber)
{
    std::cout << "UserAnimation_";
    std::cout << animationNumber;
    std::cout << 'n';
}

LedAnimationArray _builtInAnimations[]
{
    {"Off", A_AllDark},
    {"On", A_AllLight}
};


// [Start want to remove this code]

void UserAni1()
{
    doUserAnimation(0);
}

void UserAni2()
{
    doUserAnimation(1);
}

LedAnimationArray _userAnimations[]
{
    {"UserAni1",UserAni1},
    {"UserAni2",UserAni2}         
};

// [End want to remove this code]

LedAnimationArray getAnimation(int animationNumber)
{
    if (animationNumber > gDefaultAnimationCount - 1)
    {
        LedAnimationArray b = {"usertest",_userAnimations[animationNumber-gDefaultAnimationCount].function};
        
       // I want to try and do something like this, but that works :)
       //LedAnimationArray b = {"usertest",  doUserAnimation(animationNumber-gDefaultAnimationCount)};
    
       return b;
    }
    else
    {
        return _builtInAnimations[animationNumber];
    }
}

int main() 
{
    gDefaultAnimationCount = sizeof(_builtInAnimations) / sizeof(_builtInAnimations[0])  ; 
    
    getAnimation(0).function();
    getAnimation(1).function();
    getAnimation(2).function();
    getAnimation(3).function();
 
    return 0;
}

So I currently pass a pointer to a function within an array like this:

LedAnimationArray b = {"usertest",_userAnimations[animationNumber-gDefaultAnimationCount].function};

But this means I have to pre-define an array of all the possibilities.

I want to try and remove the _userAnimation array, and pass a function with a parameter instead.

Something like this:

LedAnimationArray b = {"usertest",doUserAnimation(animationNumber-gDefaultAnimationCount)};