From: Olivier Andrieu <andrieu@ijm.jussieu.fr>
To: Henri DF <henri.dubois-ferriere@epfl.ch>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] choosing modules at runtime
Date: Tue, 24 Sep 2002 12:18:49 +0200 [thread overview]
Message-ID: <15760.15369.277146.734347@akasha.ijm.jussieu.fr> (raw)
In-Reply-To: <Pine.LNX.4.44.0209241034550.15455-100000@lcavpc41.epfl.ch>
Henri Dubois-Ferriere [Tuesday 24 September 2002] :
>
> Say I have a module signature M which is implemented by module structs
> M_1, M_2, M_3, .. M_N.
>
> At runtime , depending on some command-line parameters, I will choose one
> of the module implementations (they use different algorithms internally).
>
> This means my main code will be littered with things like
>
> if (use algorithm 1) then
> M_1.run_algo()
> else if (use algorithm 2) then
> M_2.run_algo() ...
You could use local modules :
if (use algorithm 1) then
let module M = M_1 in
M.run_algo() ...
else if (use algorithm 2) then
let module M = M_2 in
M.run_algo() ...
the point is that the blocks under the `let module .. = ' are the
same, so you can copy/paste them. You could use some preprocessing
treatment to make it look better.
--
Olivier
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next prev parent reply other threads:[~2002-09-24 10:18 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-24 8:48 Henri Dubois-Ferriere
2002-09-24 9:36 ` Andreas Rossberg
2002-09-24 10:37 ` Markus Mottl
2002-09-24 10:08 ` Markus Mottl
2002-09-24 10:18 ` Olivier Andrieu [this message]
2002-09-24 17:24 ` Sven LUTHER
2002-09-24 10:42 ` Yamagata Yoriyuki
2002-09-24 12:43 ` Alessandro Baretta
2002-09-24 12:55 ` Maxence Guesdon
2002-09-24 10:40 Sebastien.deMentendeHorne
2002-09-24 11:00 ` Markus Mottl
2002-09-24 11:09 Sebastien.deMentendeHorne
2002-09-24 11:41 ` Markus Mottl
2002-09-30 7:28 ` John Max Skaller
2002-10-02 13:04 ` Alessandro Baretta
2002-10-02 13:28 ` Dave Mason
2002-10-02 20:57 ` Chris Hecker
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