Interfaces with default or static methods in aspects

[Joachim Wedin]

Currently, it does not work to define an interface with a default or static method in an aspect. For example, the following does not work:

aspect A {
  interface MyInterface {
    public default int f() {
      return 0;
    }
  }
}

When building you get: unexpected token "default":

[Jesper Öqvist]

Added a test for static interface methods to JastAdd-test: https://bitbucket.org/jastadd/jastadd-test/commits/d52e7fad88cff8a9d659c3ba96b366998148d35f

[Jesper Öqvist]

[parsing] Allow default keyword as modifier

fixes #320

→ <<cset 3fe23df959c4>>