From: Lukasz Stafiniak <lukstafi@gmail.com>
To: Caml <caml-list@inria.fr>
Subject: [Caml-list] GADT definition
Date: Thu, 19 Dec 2013 23:17:42 +0100 [thread overview]
Message-ID: <CAJMfKEUsQn6MmcwDPhOzwrozOr5biQb-ktVaS2x=KwCdCZEARw@mail.gmail.com> (raw)
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Hi,
This is just a test so I'm not much concerned, but I have these definitions:
type z
type _ s
type (_, _, _) balance =
| Less : (*∀'a.*) ('a, 'a s, 'a s) balance
| Same : (*∀'b.*) ('b, 'b, 'b) balance
| More : (*∀'a.*) ('a s, 'a, 'a s) balance
type _ aVL =
| Leaf : z aVL
| Node : (*∀'a, 'b, 'c.*)('a, 'b, 'c) balance * 'a aVL * int * 'b aVL ->
('c s) aVL
and I get the error for "type _ aVL =":
Error: In this definition, a type variable cannot be deduced
from the type parameters.
What to do?
Regards,
Łukasz "lukstafi"
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next reply other threads:[~2013-12-19 22:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-19 22:17 Lukasz Stafiniak [this message]
2013-12-19 22:20 ` Lukasz Stafiniak
2013-12-19 22:21 ` Lukasz Stafiniak
2013-12-19 22:27 ` Milan Stanojević
2013-12-19 22:35 ` Lukasz Stafiniak
2013-12-19 23:10 ` Gabriel Scherer
2013-12-19 23:47 ` Jacques Le Normand
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