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view lib/ur/option.urs @ 1050:93315ac00394

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More fun with cookies
author Adam Chlipala <adamc@hcoop.net>
date Thu, 26 Nov 2009 14:20:00 -0500
parents 8c37699de273
children 757dbac0454d
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datatype t = datatype Basis.option

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