The problem is that OCaml type-checker is unification based instead of subtyping-constraint based
and therefore require (useless) type cast in some place (with variant and objects) ... This is why
you get unnatural behaviour of the type-checker with oo and variant in OCaml ...


-- 
Christophe Raffalli
Universite de Savoie
Batiment Le Chablais, bureau 21
73376 Le Bourget-du-Lac Cedex

tel: (33) 4 79 75 81 03
fax: (33) 4 79 75 87 42
mail: Christophe.Raffalli@univ-savoie.fr
www: http://www.lama.univ-savoie.fr/~RAFFALLI
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