annotate record.urs @ 28:f55f66c6fdee
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 |
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| rev |
line source |
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adam@11
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1 val numFields : r ::: {Type} -> folder r -> $r -> int
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adam@11
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2
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adam@10
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3 val mem : a ::: Type -> ns ::: {Unit} -> eq a -> folder ns -> a -> $(mapU a ns) -> bool
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adam@10
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4 (* Is a value found in a record? *)
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adam@12
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5
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adam@12
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6 val equal : ts ::: {Type} -> $(map eq ts) -> folder ts -> $ts -> $ts -> bool
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adam@12
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7 (* Are two records equal? *)
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ezyang@28
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8
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ezyang@28
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9 (* Analogous to applicative ap e.g. <*>, of type [f (a -> b) -> f a -> f b] *)
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ezyang@28
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10 val ap : K --> tf1 :: (K -> Type) -> tf2 :: (K -> Type)
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ezyang@28
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11 -> r ::: {K} -> folder r
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ezyang@28
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12 -> $(map (fn t => tf1 t -> tf2 t) r)
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ezyang@28
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13 -> $(map tf1 r)
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ezyang@28
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14 -> $(map tf2 r)
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