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view lib/ur/option.urs @ 1835:a8b273f1f7e3

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add Placeholder attribute to <password>; change <textbox> code generation to set 'type' to 'text'
author Adam Chlipala <adam@chlipala.net>
date Fri, 30 Nov 2012 10:02:13 -0500
parents 36428d853c97
children
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datatype t = datatype Basis.option

val monad : monad t

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
val unsafeGet : a ::: Type -> option a -> a