Obtaining a pointer to the end of an array

Question

I use the following template to obtain a pointer pointing after the last element of an array:

template 
T* end_of(T (&array)[n])
         


        

Answer 1

Your proposal is not necessarily evaluated at compile time, it depends on optimisation. The following is calculated at compile time:

template  char (&array(T(&)[N]))[N];

int main()
{
  int myArray[10];

  std::cout << sizeof array(myArray) << std::endl;

  return 0;
}

It works by creating an array type of char which is the same number of elements as the given array. sizeof always returns size in number of chars.