Kernrechtsfrage
Whether the complaint in public law matters is admissible despite Art. 83 lit. c no. 2 BGG because the appellant has a claim under Art. 7 ANAG.
Extrahierter Entscheid
The appeal was admissible because a Swiss spouse generally gives rise to a residence permit claim under Art. 7 ANAG; whether abuse of rights defeats that claim is a merits question.
Extrahierte Begründung
The marriage still formally existed, so the appellant had a prima facie right of residence. The abuse-of-rights objection does not affect standing but the substantive assessment.