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author | Adam Chlipala <adamc@hcoop.net> | 2008-11-20 11:34:36 -0500 |
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committer | Adam Chlipala <adamc@hcoop.net> | 2008-11-20 11:34:36 -0500 |
commit | a01f4dd530689d29ac7518bb9a8d19b919ef76ac (patch) | |
tree | be1fb9f820200f6d2620e1e597ff809b1f438d29 /demo/list.ur | |
parent | 7b09fa2aca2982038889f960e51d7b1e91a70991 (diff) |
Some demo improvements
Diffstat (limited to 'demo/list.ur')
-rw-r--r-- | demo/list.ur | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/demo/list.ur b/demo/list.ur index c2dfce22..107bf92c 100644 --- a/demo/list.ur +++ b/demo/list.ur @@ -1,15 +1,21 @@ datatype list t = Nil | Cons of t * list t -fun length' (t ::: Type) (ls : list t) (acc : int) = - case ls of - Nil => acc - | Cons (_, ls') => length' ls' (acc + 1) +fun length (t ::: Type) (ls : list t) = + let + fun length' (ls : list t) (acc : int) = + case ls of + Nil => acc + | Cons (_, ls') => length' ls' (acc + 1) + in + length' ls 0 + end -fun length (t ::: Type) (ls : list t) = length' ls 0 - -fun rev' (t ::: Type) (ls : list t) (acc : list t) = - case ls of - Nil => acc - | Cons (x, ls') => rev' ls' (Cons (x, acc)) - -fun rev (t ::: Type) (ls : list t) = rev' ls Nil +fun rev (t ::: Type) (ls : list t) = + let + fun rev' (ls : list t) (acc : list t) = + case ls of + Nil => acc + | Cons (x, ls') => rev' ls' (Cons (x, acc)) + in + rev' ls Nil + end |