Cannot use instance of a Type in For Next

[enonod]

I have a message that a regular variable must be used with a For/Next loop.
I was attempting...

Type Fred(c as Byte, r as Byte)
Dim cr as Fred

For cr.c = 2 to 12

The message is clear but since cr.c can be set with a byte value I don't understand why this is not permitted without having to copy the value to/from another 'regular' variable.
Is there a reason for this or just not allowed?

 

[mc73]

Why would you want to 'for' a type's element?

 

[Erel]

It is a technical limitation related to the way 'for each' is implemented.

 

[enonod]

@:Erel. Thank you.

@:mc73. I have a subroutine with a parameter as a Type being passed which works fine. I suddenly wish to use the same sub called from elsewhere when I only have available the individual c & r values so to pass them I had to copy them into the individual fields of the Type before passing them. I thought that rather than convert them I would use the Type fields in the first place and save a couple of lines of code. It obviously cannot be done and so back to the original.