Error: 'this' is only defined in non-static member functions

[Steven Schveighoffer]

On 11/22/17 5:19 PM, A Guy With a Question wrote:
> I have an interface where I have a classes embedded in it's scope 
> (trying to create something for the classes that implement the interface 
> can use for unittesting).
> 
>      interface IExample
>      {
>          // stuff ...
>          class Tester
>          {
> 
>          }
>      }
> 
> I'm trying to make an instance of it like:
> 
>      auto tester = new IExample.Tester();
> 
> And I get the above error.

Hm... not sure how this works for inner classes of Interfaces, but if 
it's anything like inner classes of classes, then they have a hidden 
'outer' pointer pointing at the owning instance of the class.

This allows access to the outer class's members. So you need an instance 
to instantiate.

I bet it's the same for interfaces.

What you probably want is a static class, which will remove that connection:

static class Tester
...

-Steve