Problem with un-initialized shift register datatype

[Nova2]

I am trying to create an un-initialized shift register in a while loop.  When created the default type is Void.  If I wire a constant (initialize on the left side) with the data type I want, the shift register arrows change color to the appropriate data type.  However if I then remove the initial value the arrow returns to black and the void data type.  I want it to remain the color and the data type with no input (initialized).  How do I accomplish this

[Citabria]

Set the type inside the while loop

[Chris_12345]

Try using the "First Call?" function along with a case statement inside the loop. There are many ways you can do it.  See attachments for a couple simple suggestions.