Re: [Caml-list] Problem with parametric classes

[John Max Skaller <skaller@ozemail.com.au>]

Frederic Tronel wrote:

>Hello,
>
>I'm using Ocaml 3.04 (plus a patch applied to circumvent a 
>problem with parametric classes bug id 841).
>
>I'm trying to compile the following piece of code (more
>precisely, this is a significant excerpt of the faulty code).
>which fails with the following error:
>
I commented out the initialiser in specElement and got this error:

File "tmp.ml", line 30, characters 22-41:
The type of this expression,
< get_ident : int; set_ident : int -> unit; _.. > countingObjects,
contains type variables that cannot be generalized

and here on line 30 you are making an instance object without
binding the type variable ..

let countingObjects = new countingObjects ;;

That seems suspicious .. countingObjects is generic
here .. this is at global scope .. the initialiser
which fixes the type is inside a class ..
this has to be wrong ..

-- 
John Max Skaller, mailto:skaller@ozemail.com.au
snail:10/1 Toxteth Rd, Glebe, NSW 2037, Australia.
voice:61-2-9660-0850




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