Wow, so that's how D code would look like if it were C++ :)
When dipping my toes into C++ to do a quicksort algorithm, I quickly got annoyed I'd have to create all the individual comparison functions rather than just one like in D... Which is one thing I'm seeing from the converted 'toy'. Actually I ended up making an opCmp and then overloading all the individual types to use the opCmp.
