From eb171fceba46cbe600d8e29adc526e86719cdc4f Mon Sep 17 00:00:00 2001 From: Adam Chlipala Date: Thu, 20 Nov 2008 11:34:36 -0500 Subject: Some demo improvements --- demo/list.ur | 30 ++++++++++++++++++------------ 1 file changed, 18 insertions(+), 12 deletions(-) (limited to 'demo/list.ur') 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 -- cgit v1.2.3