From cba2fcb9b118cedb603b171ac7d7581c5adb844c Mon Sep 17 00:00:00 2001
From: bringert <bringert@cs.chalmers.se>
Date: Wed, 30 Nov 2005 16:00:06 +0000
Subject: Moved transfer libraries to transfer/lib

---
 transfer/lib/nat.tr | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 transfer/lib/nat.tr

(limited to 'transfer/lib/nat.tr')

diff --git a/transfer/lib/nat.tr b/transfer/lib/nat.tr
new file mode 100644
index 000000000..c529e5238
--- /dev/null
+++ b/transfer/lib/nat.tr
@@ -0,0 +1,18 @@
+data Nat : Type where
+	Zero : Nat
+  	Succ : (n:Nat) -> Nat
+
+plus : Nat -> Nat -> Nat
+plus Zero y = y
+plus (Succ x) y = Succ (plus x y)
+
+pred : Nat -> Nat
+pred Zero = Zero
+pred (Succ n) = n
+
+natToInt : Nat -> Int
+natToInt Zero = 0
+natToInt (Succ n) = 1 + natToInt n
+
+intToNat : Int -> Nat
+intToNat n = if n == 0 then Zero else Succ (intToNat (n-1))
-- 
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