From: Valerie.Menissier-Morain@dyade.fr (Vale'rie Me'nissier-Morain)
To: mposada@impsat.net.co
Cc: caml-list@pauillac.inria.fr
Subject: Re: Type constraints
Date: Fri, 30 May 1997 12:01:21 +0200 [thread overview]
Message-ID: <199705301001.MAA32195@ebene.inria.fr> (raw)
In-Reply-To: <338DD17B.62C6@impsat.net.co> (message from Ernesto Posse on Thu, 29 May 1997 13:56:59 -0500)
Why do you need to define t2 simultaneously to 'a node and t1?
The following session is ok in Caml Light
> Caml Light version 0.73
#type 'a node = {x: 'a; y: t1}
and t1 = A | B of t1*t1;;
Type node defined.
Type t1 defined.
#type t2 = C | D of (string * t2) node;;
Type t2 defined.
#type t2 = C | D of (string * t2) node | E of bool node;;
Type t2 defined.
#
or, if you prefer in Objective Caml
Objective Caml version 1.05
# type 'a node = {x: 'a; y: t1}
a nd t1 = A | B of t1*t1;;
type 'a node = { x: 'a; y: t1 }
type t1 = | A | B of t1 * t1
# type t2 = C | D of (string * t2) node;;
type t2 = | C | D of (string * t2) node
# type t2 = C | D of (string * t2) node | E of bool node;;
type t2 = | C | D of (string * t2) node | E of bool node
V. Ménissier-Morain
next prev parent reply other threads:[~1997-05-30 12:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-05-29 18:56 Ernesto Posse
1997-05-30 7:41 ` Pascal Brisset
1997-05-30 9:24 ` Didier Rousseau
1997-05-30 10:01 ` Vale'rie Me'nissier-Morain [this message]
1997-05-30 11:09 ` Wolfgang Lux
1997-05-30 12:17 ` Jerome Vouillon
2004-12-06 19:55 Jim Farrand
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