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view lib/ur/option.urs @ 955:01a4d936395a

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tail example working
author Adam Chlipala <adamc@hcoop.net>
date Thu, 17 Sep 2009 17:11:23 -0400
parents da3ec6014d2f
children 8c37699de273
line wrap: on
line source
datatype t = datatype Basis.option

val eq : a ::: Type -> eq a -> eq (t a)

val isNone : a ::: Type -> t a -> bool
val isSome : a ::: Type -> t a -> bool

val mp : a ::: Type -> b ::: Type -> (a -> b) -> t a -> t b
val bind : a ::: Type -> b ::: Type -> (a -> option b) -> t a -> t b