Generic Implements not working

[mansellan]

Describe the bug
It's not possible to implement a generic interface (or class), or any non-generic interface which contains generic members.

To Reproduce

Public Interface SomeInterface(Of T)
    Sub SomeSub(Value As T) ' Unrecognised datatype symbol 'T'
End Interface

Public Class Set(Of T)
    Implements SomeInterface(Of T) ' Missing implementation of member Sub SomeSub(ByRef Value as {unresolved})

    Public Sub SomeInterface_SomeSub(Value As T)
    	Debug.Assert False
    End Sub
    
End Class

Expected behavior
Should be able to implement generic interfaces / members

Additional context
I've tried a few different ways to phrase this, but it seems like Implements only works on non generic types, and only if they don't contain any generic members.

Desktop (please complete the following information):

• OS: Windows 10 (2004)
• twinBASIC compiler version; v0.13.83

[WaynePhillipsEA]

Unfortunately there isn't a quick-fix for this one. In fact, even attempting to use a non-generic interface with Implements inside a generic class is problematic at the moment (unless that interface is defined in a package or type library).

It needs some thought on how best to fix this, so I'll get back to you on it, but be warned it might be a little while until I get to it.

[WaynePhillipsEA]

Contrary to my earlier remarks, I have now solved this. However, I need to write more tests for it, so bear with me and it should be ready for tomorrow.

[WaynePhillipsEA]

Now fixed in v0.13.86, thanks for reporting!

Also fixed the Implements clause on generics, so that you can do Public Sub SomeSub(Value As T) Implements SomeInterface(Of T).SomeSub.

[mansellan]

Wow, that's fast work! (I should be used to it by now...)