annotate lib/ur/list.ur @ 797:2c463eee89fa

cselect
author Adam Chlipala <adamc@hcoop.net>
date Thu, 14 May 2009 09:33:48 -0400
parents 6271f0e3c272
children e92cfac1608f
rev   line source
adamc@794 1 datatype t = datatype Basis.list
adamc@794 2
adamc@794 3 val show (a ::: Type) (_ : show a) =
adamc@794 4 let
adamc@794 5 fun show' (ls : list a) =
adamc@794 6 case ls of
adamc@794 7 [] => "[]"
adamc@794 8 | x :: ls => show x ^ " :: " ^ show' ls
adamc@794 9 in
adamc@794 10 mkShow show'
adamc@794 11 end
adamc@794 12
adamc@794 13 val rev (a ::: Type) =
adamc@794 14 let
adamc@794 15 fun rev' acc (ls : list a) =
adamc@794 16 case ls of
adamc@794 17 [] => acc
adamc@794 18 | x :: ls => rev' (x :: acc) ls
adamc@794 19 in
adamc@794 20 rev' []
adamc@794 21 end
adamc@794 22
adamc@794 23 fun mp (a ::: Type) (b ::: Type) f =
adamc@794 24 let
adamc@794 25 fun mp' acc ls =
adamc@794 26 case ls of
adamc@794 27 [] => rev acc
adamc@794 28 | x :: ls => mp' (f x :: acc) ls
adamc@794 29 in
adamc@794 30 mp' []
adamc@794 31 end
adamc@796 32
adamc@796 33 fun mapX (a ::: Type) (ctx ::: {Unit}) f =
adamc@796 34 let
adamc@796 35 fun mapX' ls =
adamc@796 36 case ls of
adamc@796 37 [] => <xml/>
adamc@796 38 | x :: ls => <xml>{f x}{mapX' ls}</xml>
adamc@796 39 in
adamc@796 40 mapX'
adamc@796 41 end