view tests/cancel2.ur @ 1736:7ec8dab190a7

Better discovery of type class instances from recursive definitions
author Adam Chlipala <adam@chlipala.net>
date Wed, 02 May 2012 08:34:50 -0400
parents 125f9b01fbf1
children
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fun f [r] [[Id, Foo] ~ r] (x : $(map (fn ts => $ts) r ++ [Id = int, Foo = string]))
    : $(map (fn ts => $ts) r ++ [Foo = string]) = x

val r = {}
val x : $(map (fn ts => $ts) _ ++ [Foo = string]) = f r