Re: [Caml-list] match on dynamic type

[Olivier Ricordeau <olivier.ricordeau@wanadoo.fr>]

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Olivier Ricordeau wrote:
>>Hi!
>>I'd like to know how I can make a match on an object's dynamic type. Let
>>a be an abstract class. Let b and c be two class which inherit from a.
>>I'd like to write a method which looks like this:
>>
>>method foo (bar : a) =
>>    match "a's dynamic type" with
>
> I meant:
>       match "bar's dynamic type" with
>
>
>>       b -> do_something()
>>     | c -> do_something_else()

According to two mails I've just received from members of this list:
- -> This cannot be done with OCaml
- -> The trick is to add an string attribute (non-mutable) which contains
the dynamic type to the mother class.

Thanks to Basile Starynkevitch and Richard Jones for their help.

- --
- -= *Olivier RICORDEAU* =-        http://freefolks.org
          < LibNN addict http://libnn.org >
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olivier.ricordeau@wanadoo.fr _Might the source be with you_
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