view tests/cancel.ur @ 2198:cf2abef213d8

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author Adam Chlipala <adam@chlipala.net>
date Sat, 05 Dec 2015 12:12:40 -0500
parents dfb38a333816
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type t = {A : int, B : float, C : string}
type u = {A : int, C : string, D : bool}

fun f (x : t) = x
fun g (x : u) = f x

fun h [ts] [ts ~ [A]] (r : $([A = int] ++ ts)) : $([A = int, B = float] ++ ts) = r