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comparison lib/ur/top.urs @ 631:effa7d43aac3

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Make folders abstract
author Adam Chlipala <adamc@hcoop.net>
date Tue, 24 Feb 2009 14:04:07 -0500
parents 6a6eb9882d57
children 6c4643880df5
comparison
equal deleted inserted replaced
630:6a6eb9882d57 631:effa7d43aac3
1 (** Row folding *) 1 (** Row folding *)
2 2
3 con folder = K ==> fn r :: {K} => 3 con folder :: K --> {K} -> Type
4 tf :: ({K} -> Type)
5 -> (nm :: Name -> v :: K -> r :: {K} -> tf r
6 -> [[nm] ~ r] => tf ([nm = v] ++ r))
7 -> tf [] -> tf r
8 4
9 structure Folder : sig 5 structure Folder : sig
6 val fold : K --> r ::: {K} -> folder r
7 -> tf :: ({K} -> Type)
8 -> (nm :: Name -> v :: K -> r :: {K} -> tf r
9 -> [[nm] ~ r] => tf ([nm = v] ++ r))
10 -> tf [] -> tf r
11
10 val nil : K --> folder (([]) :: {K}) 12 val nil : K --> folder (([]) :: {K})
11 val cons : K --> r ::: {K} -> nm :: Name -> v :: K 13 val cons : K --> r ::: {K} -> nm :: Name -> v :: K
12 -> [[nm] ~ r] => folder r -> folder ([nm = v] ++ r) 14 -> [[nm] ~ r] => folder r -> folder ([nm = v] ++ r)
13 val concat : K --> r1 ::: {K} -> r2 ::: {K} 15 val concat : K --> r1 ::: {K} -> r2 ::: {K}
14 -> [r1 ~ r2] => folder r1 -> folder r2 -> folder (r1 ++ r2) 16 -> [r1 ~ r2] => folder r1 -> folder r2 -> folder (r1 ++ r2)