There are times when I've wanted something like this because I don't know the resultant type of a bunch of range operations, but have to save it in a struct or class.typeof is your friend.
Only when there is a definite type. Consider:
struct foo {
Range!int rng;
this( int[] arr, bool b ) {
if ( b ) {
rng = arr;
} else {
rng = map!"a+b"( arr );
}
}
}
--
Simen
