view demo/more/dlist.urs @ 1428:58c9c039582a

Deal with Postgres's wonky type-changing for nullable columns of views
author Adam Chlipala <adam@chlipala.net>
date Fri, 25 Feb 2011 15:46:29 -0500
parents e9c5992bc9bc
children 68429cfce8db
line wrap: on
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con dlist :: Type -> Type
type position

val create : t ::: Type -> transaction (dlist t)
val clear : t ::: Type -> dlist t -> transaction unit
val append : t ::: Type -> dlist t -> t -> transaction position
val replace : t ::: Type -> dlist t -> list t -> transaction unit

val delete : position -> transaction unit
val elements : t ::: Type -> dlist t -> signal (list t)
val size : t ::: Type -> dlist t -> signal int
val numPassing : t ::: Type -> (t -> signal bool) -> dlist t -> signal int
val foldl : t ::: Type -> acc ::: Type -> (t -> acc -> signal acc) -> acc -> dlist t -> signal acc

val render : ctx ::: {Unit} -> [ctx ~ body] => t ::: Type
             -> (t -> position -> xml (ctx ++ body) [] [])
             -> {StartPosition : signal (option int),
                 MaxLength : signal (option int),
                 Filter : t -> signal bool,
                 Sort : signal (option (t -> t -> signal bool)) (* <= *)}
             -> dlist t
             -> xml (ctx ++ body) [] []