On Tuesday, 12 March 2019 at 14:44:59 UTC, Ron Tarrant wrote:
As a side note, in 0004 you say:
We can still call the constructor, even though strictly speaking it’s private, because by using ‘new MyButton()’ the constructor isn’t being called directly, but as part of a lower-level process for instantiating the object.
I'm still new to D too, but I think it works in this scenario because private in D works on the module/file level. main/TestRigWindow/MyButton are defined in the same file (module) and thus can access each others private members. If you put the button class in its own file/module and import it then you would have to make its constructor public to access it.
button_002_04_oop_arg.d(22): Error: class `button_002_04_oop_arg_2.MyButton` member this is not accessible
