a struct as an multidimensional array index

[Chris Katko via Digitalmars-d-learn]

Is it somehow possible to use a struct as a [multidimensional] 
array index:

````D
struct indexedPair
{
size_t x, y;
}

bool isMapPassable[100][100];
auto p = indexedPair(50, 50);

if(isMapPassable[p]) return true;

````

Probably not, but I'm curious.