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From: Samuel Mimram <samuel.mimram@ens-lyon.org>
To: Christophe Raffalli <christophe.raffalli@univ-savoie.fr>
Cc: caml-list <caml-list@inria.fr>
Subject: Re: [Caml-list] is this a bug ?
Date: Tue, 09 May 2006 15:19:44 +0200	[thread overview]
Message-ID: <446096F0.6000405@ens-lyon.org> (raw)
In-Reply-To: <44609473.6030004@univ-savoie.fr>

Hi,

Christophe Raffalli wrote:
> --------------------------------
> let f b l = match l with
>   [] | [_] -> 1
> | [a;_] | [_;a] when a = b-> 2
> | _ -> 3
> 
> let _ =
>   print_int (f 1 [1;2]);
>   print_int (f 1 [2;1]);
>   print_newline ()
> --------------------------------
> 
> Do you think this code should have a useless pattern warning and print
> "23" instead of "22" ?
> 
> If someone tell me this is a bug then I fill a bug report ...

I guess that the priorities says that you should "read" the third line as

| [a;_] | ( [_;a] when a = b ) -> 2

This would justify the warning and explain the behaviour...

Cheers,

Samuel.


  parent reply	other threads:[~2006-05-09 13:19 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-05-09 13:09 Christophe Raffalli
2006-05-09 13:16 ` [Caml-list] " Remi Vanicat
2006-05-09 13:19 ` Samuel Mimram [this message]
2006-05-09 13:26   ` Christophe Raffalli
2006-05-09 13:33     ` Samuel Mimram
2006-05-09 13:30   ` Yoann Padioleau
2006-05-09 13:22 ` Christophe Raffalli
2006-05-09 13:33 ` Luc Maranget
2006-05-09 13:47 ` Arne Ehrlich
2006-05-09 18:24   ` Jonathan Roewen
2006-05-09 13:47 ` Alain Frisch
  -- strict thread matches above, loose matches on Subject: below --
2007-05-01 12:59 Is this a bug? Thomas Fischbacher
2007-05-01 13:34 ` [Caml-list] " Eric Cooper
2007-05-02  0:25 ` Jacques Garrigue
2007-05-02  0:50   ` Thomas Fischbacher
2007-05-02  2:40     ` Jacques GARRIGUE
2002-07-08 19:53 [Caml-list] productivity improvement Oleg
2002-07-10 15:39 ` John Max Skaller
2002-07-12 12:16   ` [Caml-list] Is this a bug? John Max Skaller
2002-07-12 14:05     ` Xavier Leroy

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