Quick Question on Constructors

General
1

I have a class with 3 constructors.

Sub Constructor() End Sub

Sub Constructor(oActions() As Action) Actions = oActions End Sub

Sub Constructor(ParamArray acts As Action) Actions = acts End Sub

If I call the first version with no parameters I get “There is more than one item with this name and it’s not clear to which this refers”.

In the past when this happens it is because I have not created an empty constructor.

I did some testing and it seems as long as I have one constructor with a ParamArray I can not use an empty constructor.

Does a paramarray constructor preclude a blank constructor?

2

the one for paramarray blocks the default constructor.

3

Thanks Christian. I assume this means the “indefinite number of values” the paramarray allows includes 0. I can workaround - it just seemed odd to me.

4

As the docs say:

5

You can get around this another way:

Sub Constructor (firstAction As Action, ParamArray acts() As Action)
  acts.Insert 0, firstAction

That form will always expect at least one parameter.

But in this case, I’d probably just check acts.Ubound.

6

Get rid of the no param version and just have the paramarray version check for nil if you pass no parameter

Sub Constructor(ParamArray acts As Action)
if acts <> nil then Actions = acts
End Sub

7

Thanks Eli, Kem and Norman. I had already modified to Norman’s suggestion.