More D newb questions.

[Walter Bright]

Me Here wrote:
> What elese could 'a' ~ 'b' mean other than char[] tmp = "ab"?

Let's generalize the issue to be what does:

	T ~ T

mean for any type T? Your argument is that the result should be T[]:

	T ~ T => T[]

Ok. So imagine now that T is S[]:

         S[] ~ S[] => S[][]

and we've done away with array concatenation. We could make a special 
case just for char values (and presumably all basic types), but then 
we'll find ourselves unable to write generic code.

	T ~ T[] => T[]
	T[] ~ T => T[]

has no such ambiguity, and so is supported.