Question juridique clé
Whether the public-law appeal was admissible despite the alleged loss of current interest.
Solution extraite
The appellant no longer had a practical and current interest in overturning the cantonal decision, so he lacked standing to appeal.
Motifs extraits
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.