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view lib/ur/option.urs @ 945:7710f65935b6

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author Adam Chlipala <adamc@hcoop.net>
date Tue, 15 Sep 2009 16:06:12 -0400
parents da3ec6014d2f
children 8c37699de273
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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