Member not accessible in delegate body

[Yuxuan Shui via Digitalmars-d-learn]

On Friday, 23 September 2016 at 15:29:43 UTC, Rene Zwanenburg 
wrote:
> On Friday, 23 September 2016 at 07:54:15 UTC, John C wrote:
>> How is it possible that "onTextChanged" isn't accessible but 
>> the private method "changeSize" *is*?
>
> Smells like an oversight. I guess the compiler doesn't see the 
> delegate as a member of a Control subclass, so it can't access 
> protected members. Private works because private in D means 
> module private.
>
> Please file an issue. As a workaround you can try to take the 
> address of the method in the closure (untested):
>
> void delegate() foo()
> {
>   auto func = &super.someProtectedFunc;
>
>   return () => func(); // I think this will work
> }

Quoting the document: "protected only applies inside classes (and 
templates as they can be mixed in) and means that a symbol can 
only be seen by members of the same module, or by a derived 
class."

So protected also means module visibility.