>
>
>># class virtual ['a] visitor =
>>   object
>>     method virtual caseNil : 'a
>>   end
>>   and virtual int_list =
>>   object
>>     method virtual visit : 'a.('a visitor -> 'a)
>>   end
>>   ;;
>>class virtual ['a] visitor : object method virtual caseNil : 'a end
>>class virtual int_list : object method virtual visit : 'a visitor ->
>>'a end
>>
>># class nil =
>>   object
>>     inherit int_list
>>     method visit v = v#caseNil
>>   end
>>   ;;
>>This expression has type 'a visitor
>>It has no method caseNil
>>    
>>
>
>it seems to work with class types :
>  
>
ok, but it does not answer my question.

I am still puzzled by the answer of the interpreter which says me that
"v has type 'a visitor; It has no method caseNil"
although it has inferred just before that
"class virtual ['a] visitor : object method virtual caseNil : 'a end"

Moreover, it seems odd to me that it works with class types but not without.
These class types should be inferred by Ocaml, shouldn't they ? (and 
they seems
to be correctly inferred in my example (in the first part of it))

So I ask again : how should I interpret the error message given by ocaml ?

Regards

Sébastien



-------------------
To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr
Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/
Beginner's list: http://groups.yahoo.com/group/ocaml_beginners