[Caml-list] ocaml-classes-3.05

[Caml-list] ocaml-classes-3.05

[Jacques Garrigue]

O'Caml classes 3.05 is now available at

  http://wwwfun.kurims.kyoto-u.ac.jp/soft/olabl/classes/
  ftp://ftp.kurims.kyoto-u.ac.jp/pub/lang/olabl/ocaml-classes-3.05.tar.gz
  ftp://ftp.inria.fr/lang/caml-light/bazar-ocaml/ocaml-classes-3.05.tar.gz

This is a small library of wrappers around standard library classes,
to allow a somehow object-oriented use.
Since ocaml 3.05, collection classes have also polymorphic fold
methods.

---------------------------------------------------------------------------
Jacques Garrigue      Kyoto University     garrigue at kurims.kyoto-u.ac.jp
		<A HREF=http://wwwfun.kurims.kyoto-u.ac.jp/~garrigue/>JG</A>
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Re: [Caml-list] ocaml-classes-3.05

[Oleg]

On Monday 05 August 2002 02:45 am, Jacques Garrigue wrote:
> O'Caml classes 3.05 is now available at
>
>   http://wwwfun.kurims.kyoto-u.ac.jp/soft/olabl/classes/
>   ftp://ftp.kurims.kyoto-u.ac.jp/pub/lang/olabl/ocaml-classes-3.05.tar.gz
>   ftp://ftp.inria.fr/lang/caml-light/bazar-ocaml/ocaml-classes-3.05.tar.gz
>
> This is a small library of wrappers around standard library classes,
> to allow a somehow object-oriented use.

Jacques, what are the advantages of using the OO wrappers over the 
corresponding modules from the standard distribution?

Thanks
Oleg
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Re: [Caml-list] ocaml-classes-3.05

[John Prevost]

>>>>> "oi" == Oleg  <oleg_inconnu@myrealbox.com> writes:

    oi> Jacques, what are the advantages of using the OO wrappers over
    oi> the corresponding modules from the standard distribution?

An example that's occurred to me in the past: OO wrappers for the I/O
routines would be very good if you want to be able to introduce your
own varieties of streams, and use common code over all of them.

John.

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Re: [Caml-list] ocaml-classes-3.05

[Jacques Garrigue]

From: Oleg <oleg_inconnu@myrealbox.com>
> > O'Caml classes 3.05 is now available at
> >
> >   http://wwwfun.kurims.kyoto-u.ac.jp/soft/olabl/classes/
> >   ftp://ftp.kurims.kyoto-u.ac.jp/pub/lang/olabl/ocaml-classes-3.05.tar.gz
> >   ftp://ftp.inria.fr/lang/caml-light/bazar-ocaml/ocaml-classes-3.05.tar.gz
> >
> > This is a small library of wrappers around standard library classes,
> > to allow a somehow object-oriented use.
> 
> Jacques, what are the advantages of using the OO wrappers over the 
> corresponding modules from the standard distribution?

None.
You don't get more features.
But it felt strange at the beginning to have an OO languages with no
basic classes. So I quickly wrote those, and apparently some people
are using them. They may like the oo syntax, or the customizability.

Jacques Garrigue
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Re: [Caml-list] ocaml-classes-3.05

[james woodyatt]

On Monday, Aug 5, 2002, at 17:13 US/Pacific, Jacques Garrigue wrote:
> From: Oleg <oleg_inconnu@myrealbox.com>
>>
>> Jacques, what are the advantages of using the OO wrappers over the
>> corresponding modules from the standard distribution?
>
> None.
> You don't get more features.

Actually... not true.  You get the ability to override the methods by 
inheritance.  In exchange for this feature, you pay a not insignificant 
cost in initialization time and program codespace.  Whether this trade 
is a good one is open to interpretation.

> But it felt strange at the beginning to have an OO languages with no
> basic classes. So I quickly wrote those, and apparently some people
> are using them. They may like the oo syntax, or the customizability.

It felt strange to me at first too.  The feeling eventually passed when 
I fully understood what is really easier to do with classes and class 
types than with modules, signatures and functors.

My advice: Use the most basic syntax the language provides to do the 
basics.  Use objects and methods only when functions (including 
higher-order functions) are insufficient.

--james

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