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Re: string variables in Printf.* calls: Bug, or lack of understanding?
- bonnardv@p...
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| Date: | -- (:) |
| From: | bonnardv@p... |
| Subject: | Re: string variables in Printf.* calls: Bug, or lack of understanding? |
[English summary at the end]
>> Dans ce cas, comment avoir un record (en Caml-light):
>>
>> type Rec = { x: ('a, 'b, 'c) printf__format };;
>>
>> ne marche pas (variable 'a non lie'e).
>
>Apprenez le langage. type ('a, 'b, 'c) Rec = ...
Je veut bien, mais le record a plus de 10 champs ce qui
fait 30 variables de type pour qqchose qui n'est pas
polymorphe ! (Meme si pour Caml-light il l'est, du point
de vu du 'domaine du probleme' comme on dit, on a des
chaines indiquand un format; il n'y a aucun
polymorphisme la dedans.)
De plus je ne sais pas comment innitialiser les champs:
let f = { x = "toto" };;
ne fonctionne pas.
Tout cela signifie t'il que l'ordre dans lequel est fait
le typage est important ?
********
I want to have a record (in Caml-light) with printf
format strings.
type Rec = { x: ('a, 'b, 'c) printf__format };;
doesn't work because the vars a, b end c aren't bound.
I have more then 10 fields in the record so does it
means I need 30 type vars ?
Also I don't know how to create an instance of this
type.
BTW does the type-system depend on the order in which
things are typed ?
Valentin Bonnard
mailto:bonnardv@pratique.fr
http://www.pratique.fr/~bonnardv (Informations sur le C++ en Francais)