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From: Judicael.Courant@lip.ens-lyon.fr (Judicael Courant)
To: caml-list@margaux.inria.fr
Subject: Irrelevant variables in patterns
Date: Thu, 26 May 94 15:03:32 +0200	[thread overview]
Message-ID: <9405261303.AA13138@lip.ens-lyon.fr> (raw)


Bonjour,

j'ai perdu un (gros) bout de temps sur le (stupide) bug suivant :

j'avais ecrit :

try (f x) with NotFound -> raise toto

au lieu de :

try (f x) with Not_found -> raise toto

Resultat : lorsqu'une exception etait levee dans l'evaluation de (f x),
elle etait toujours rattrappee. Pourtant, si j'avais voulu rattrapper toutes les exceptions, il aurait ete beaucoup plus naturel
d'ecrire :

try (f x) with _ -> raise toto

De maniere generale, le compilateur ne pourrait-il pas fournir un "Warning : irrelevant variable xxx in pattern yyy" lorsque qu'une variable liee dans un motif n'est pas utilisee ?

Judicael Courant.




             reply	other threads:[~1994-05-27 16:47 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1994-05-26 13:03 Judicael Courant [this message]
1994-05-27 18:01 ` Christophe Raffalli
1994-05-28 10:16   ` Chet Murthy
1994-05-28 10:36     ` Christophe Raffalli
1994-05-28 10:43       ` Chet Murthy
1994-05-28 11:01         ` Christophe Raffalli
1994-05-28 11:05           ` Chet Murthy
1994-05-28 11:09             ` Christophe Raffalli
1994-05-28 11:08         ` Christophe Raffalli
1994-05-28 11:12           ` Chet Murthy
1994-05-30 14:49         ` John Harrison
1994-05-30 18:20           ` calla
1994-05-30  8:53 ` Xavier Leroy
1994-05-30 17:57   ` Christophe Raffalli
1994-05-27 18:58 Damien Doligez
1994-05-30 13:15 Judicael Courant

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