Question

let’s say I have this:

    struct myStruct {
    int A;
    int B;
}

Is it possible to set a specific member via a template parameter like this?

void setTo10<?? member>(myStruct& obj) {
obj.member = 10;
}

//usage:

setTo10<"member A">(obj);

I know it’s possible with a macro but how about a template?

thanks

Answer 1

Something like this?

struct myStruct {
  int A;
  int B;
};

template <typename T, typename V>
void set(T& t, V T::*f, V v)
{ t.*f = v; }

int main()
{
  myStruct m;
  set(m, &myStruct::A, 10);
  std::cout << m.A << '\n';
}