How to initialize const members of structs on the heap

Question

I would like to allocate a structure on the heap, initialize it and return a pointer to it from a function. I\'m wondering if there\'s a way for me to initialize const membe

Answer 1

If this is C and not C++, I see no solution other than to subvert the type system.

ImmutablePoint * make_immutable_point(int x, int y)
{
  ImmutablePoint *p = malloc(sizeof(ImmutablePoint));
  if (p == NULL) abort();

  // this 
  ImmutablePoint temp = {x, y};
  memcpy(p, &temp, sizeof(temp));

  // or this
  *(int*)&p->x = x;
  *(int*)&p->y = y;

  return p;
}