view tests/type_class.ur @ 384:2a7e7bd7b29f

Building combined demo app
author Adam Chlipala <adamc@hcoop.net>
date Sun, 19 Oct 2008 15:19:41 -0400
parents 71bafe66dbe1
children fab5998b840e
line wrap: on
line source
class default t = t

val string_default : default string = "Hi"
val int_default : default int = 0

val default : t :: Type -> default t -> t =
        fn t :: Type => fn d : default t => d
val hi = default [string] _
val zero = default [int] _

val frob : t :: Type -> default t -> t =
        fn t :: Type => fn _ : default t => default [t] _
val hi_again = frob [string] _
val zero_again = frob [int] _

val main : unit -> page = fn () => <html><body>
        {cdata hi_again}
</body></html>