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view lib/ur/option.urs @ 930:51bc7681c47e

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Nullable columns *might* be working, but too much JS is generated for the page to load in finite time
author Adam Chlipala <adamc@hcoop.net>
date Sat, 12 Sep 2009 15:08:16 -0400
parents 0d30e6338c65
children da3ec6014d2f
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datatype t = datatype Basis.option

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

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