From: David Delahaye <delahaye@jurancon.inria.fr>
To: caml-list@inria.fr
Subject: Filename.chop_suffix
Date: Fri, 8 May 1998 22:52:50 +0200 (MET DST) [thread overview]
Message-ID: <199805082052.WAA02976@jurancon.inria.fr> (raw)
Bonsoir,
Je suis tombe, par hasard, sur une phrase du manuel d'ocaml en ligne qui
m'a un peu interpelle (dans Filename):
> val chop_suffix : string -> string -> string
>
> chop_suffix name suff removes the suffix suff from the filename name. The
> behavior is undefined if name does not end with the suffix suff.
Cela ressemble fortement a un trou semantique. Pourquoi ne pas lever tout
simplement une exception qui caracteriserait entierement le comportement de
cette fonction?
Amicalement.
David.
===============================================================================
David Delahaye <Email>: David.Delahaye@inria.fr
<Laboratory>: The Coq Project <Domain>: Proofs
<Adress>: INRIA-Rocquencourt Domaine de Voluceau BP105 78153 Le Chesnay Cedex
FRANCE
<Tel>: (33)-(0)1 39 63 57 53
<Fax>: (33)-(0)1 39 63 56 84
<Url>: http://pauillac.inria.fr/~delahaye
===============================================================================
[If you have time to waste, you can have a look on my proof that all the real
number are positive. Given x in R:
x^2>=0 (well-known result)
(x^2)^(1/2)>=(0)^(1/2) (use of power on each member)
x^(2*1/2)>=0 (use of the propertie: (x^n)^m=x^(n*m)
x^1>=0 (very easy simplification)
x>=0 (great!)]
reply other threads:[~1998-05-11 9:29 UTC|newest]
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