Question juridique clé
Whether the public-law appeal against the cantonal decision on admissibility of opposition in exchange-debt proceedings was admissible as to its object.
Solution extraite
Only annulment of the cantonal decision could be sought by public-law appeal; the request to declare the opposition admissible was inadmissible.
Motifs extraits
Such decisions are not civil disputes for purposes of a reform appeal, but may be challenged for arbitrariness; a public-law appeal cannot seek substitutionary merits relief.