Questão jurídica principal
Whether the public-law appeal was admissible despite the alleged loss of current interest.
Decisão extraída
The appellant no longer had a practical and current interest in overturning the cantonal decision, so he lacked standing to appeal.
Fundamentação extraída
The daughter had allegedly already returned to France to live with her father and attend school there. Any renewed cantonal decision could only reject the return request because the child was no longer in Switzerland; the exception for recurring, evading review constitutional issues did not apply.