Help translating C/C++ snippet to D

[Dustin]

Hello,
I'm trying to follow along with a C++ tutorial and translate it 
to D but I don't know C/C++ well enough to understand this 
#Define statement:

#define ARRAY_COUNT( array ) (sizeof( array ) / (sizeof( array[0] 
) * (sizeof( array ) != sizeof(void*) || sizeof( array[0] ) <= 
sizeof(void*))))

Can anyone help me understand this and translate it to a D 
function? Thanks for your time.