Can this macro be converted to a function?

Question

While refactoring code and ridding myself of all those #defines that we\'re now taught to hate, I came across this beauty used to calculate the number of elements in a struc

Answer 1

The type of a template function is inferred automatically, in contrast with that of a template class. You can use it even simpler:

template< typename T > size_t structsize( const T& t ) { 
  return sizeof( t ) / sizeof( *t ); 
}


int ints[] = { 1,2,3 };
assert( structsize( ints ) == 3 );

But I do agree it doesn't work for structs: it works for arrays. So I would rather call it Arraysize :)