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comparison record.urs @ 28:f55f66c6fdee

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Migrate ap method to Record module.
author Edward Z. Yang <ezyang@mit.edu>
date Thu, 26 Jul 2012 16:48:37 -0400
parents a6730c3cfea7
children
comparison
equal deleted inserted replaced
27:ca1c07d49b5e 28:f55f66c6fdee
3 val mem : a ::: Type -> ns ::: {Unit} -> eq a -> folder ns -> a -> $(mapU a ns) -> bool 3 val mem : a ::: Type -> ns ::: {Unit} -> eq a -> folder ns -> a -> $(mapU a ns) -> bool
4 (* Is a value found in a record? *) 4 (* Is a value found in a record? *)
5 5
6 val equal : ts ::: {Type} -> $(map eq ts) -> folder ts -> $ts -> $ts -> bool 6 val equal : ts ::: {Type} -> $(map eq ts) -> folder ts -> $ts -> $ts -> bool
7 (* Are two records equal? *) 7 (* Are two records equal? *)
8
9 (* Analogous to applicative ap e.g. <*>, of type [f (a -> b) -> f a -> f b] *)
10 val ap : K --> tf1 :: (K -> Type) -> tf2 :: (K -> Type)
11 -> r ::: {K} -> folder r
12 -> $(map (fn t => tf1 t -> tf2 t) r)
13 -> $(map tf1 r)
14 -> $(map tf2 r)