view tests/open.lac @ 66:1ec5703c09c4

Proper subsignaturing for sub-structures
author Adam Chlipala <adamc@hcoop.net>
date Thu, 26 Jun 2008 09:09:30 -0400
parents 48b6d2c3df46
children
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structure S = struct
        type t = int
        val x = 0

        structure S' : sig type u val y : t end = struct
                type u = t
                val y = x
        end

        signature Sig = sig
                type t
                val x : t
        end
end

open S.S'
open S
open S'

structure S' : Sig = S