Mercurial > urweb
view lib/ur/option.urs @ 1110:7fc4e0087e50
Proper 404 generation
author | Adam Chlipala <adamc@hcoop.net> |
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date | Sat, 02 Jan 2010 13:31:59 -0500 |
parents | 757dbac0454d |
children | a99b743a3087 |
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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 val get : a ::: Type -> a -> option a -> a