Mailing list for all users of the OCaml language and system.
 help / color / mirror / Atom feed
From: Bouzid Djamila <Bouzid.Djamila@loria.fr>
To: caml-list@pauillac.inria.fr
Subject: csl-> pb avec les fonctions dans le module
Date: Fri, 24 May 1996 16:04:18 +0200 (MET DST)	[thread overview]
Message-ID: <199605241404.QAA04595@delsarte.loria.fr> (raw)


Bonjour,

Voila mon probleme :

quand je rentre dans l'interpreteur Caml Special Light la fonction 

let do_if_debug  x = if x then (function (f, a) -> (f a)) 
                     else (function (f,a)-> ());;

la reponse est 
val do_if_debug : bool -> ('a -> unit) * 'a -> unit = <fun>

mais si j'introduis la meme fonction dans un functor c-a-d
si je rentre par exemple

module type S1 = sig  val x : bool  end
module F (X: S1) = 
 struct
  let do_if_debug  = if X.x then (function (f, a) -> (f a)) 
                     else (function (f,a)-> ())
end;;

il m'affiche le message d'erreur suivant

The type of this expression, ('_a -> unit) * '_a -> unit,
contains type variables that cannot be generalized

A quoi cela est du ??


Merci pour la reponse.

--------------------------------------------------------------------


Hi!

My problem is :

if I write in Caml Special Light interpreter this function

let do_if_debug  x = if x then (function (f, a) -> (f a)) 
                     else (function (f,a)-> ());;

the response of the interpreter is 
val do_if_debug : bool -> ('a -> unit) * 'a -> unit = <fun>

but if I introduce the same function in functor i.e 
if I write for example

module type S1 = sig  val x : bool  end
module F (X: S1) = 
 struct
  let do_if_debug  = if X.x then (function (f, a) -> (f a)) 
                     else (function (f,a)-> ())
end;;


then the response is

The type of this expression, ('_a -> unit) * '_a -> unit,
contains type variables that cannot be generalized


what is the problem ??


Thanks for the response.


D. Bouzid





                 reply	other threads:[~1996-05-24 14:36 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=199605241404.QAA04595@delsarte.loria.fr \
    --to=bouzid.djamila@loria.fr \
    --cc=caml-list@pauillac.inria.fr \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox