Re: Casting to interface not allowed in @safe code?

[Jim via Digitalmars-d-learn]

On Tuesday, 21 May 2019 at 07:04:27 UTC, rumbu wrote:
On Tuesday, 21 May 2019 at 05:51:30 UTC, Jim wrote:
That's because foo is of type Base, not implementing FeatureX.

Right, Base isn't implementing FeatureX, but foo is really a Foo 
which does:

class Foo: Base, FeatureX
{
  void setup(){};
  void x(){};
}

and it works in @system code.