Mercurial > urweb

view lib/ur/option.urs @ 1023:e46227efcbba

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Bidding interface
author Adam Chlipala <adamc@hcoop.net>
date Sun, 01 Nov 2009 10:20:20 -0500
parents 8c37699de273
children 757dbac0454d
line wrap: on
line source
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