From 2a4088119cf41175457414dfa59bd4064b8f0562 Mon Sep 17 00:00:00 2001
From: Kartik Agaram <vc@akkartik.com>
Date: Wed, 1 Jan 2020 17:04:37 -0800
Subject: 5852

---
 archive/1.vm/tangle.mu | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 archive/1.vm/tangle.mu

(limited to 'archive/1.vm/tangle.mu')

diff --git a/archive/1.vm/tangle.mu b/archive/1.vm/tangle.mu
new file mode 100644
index 00000000..91f12dea
--- /dev/null
+++ b/archive/1.vm/tangle.mu
@@ -0,0 +1,36 @@
+# example program: constructing functions out of order
+#
+# We construct a factorial function with separate base and recursive cases.
+# Compare factorial.mu.
+#
+# This isn't a very tasteful example, just a basic demonstration of
+# possibilities.
+
+def factorial n:num -> result:num [
+  local-scope
+  load-inputs
+  <factorial-cases>
+]
+
+after <factorial-cases> [
+  # if n=0 return 1
+  return-unless n, 1
+]
+
+after <factorial-cases> [
+  # return n * factorial(n - 1)
+  {
+    break-unless n
+    x:num <- subtract n, 1
+    subresult:num <- factorial x
+    result <- multiply subresult, n
+    return result
+  }
+]
+
+def main [
+  1:num <- factorial 5
+  # trailing space in next line is to help with syntax highlighting
+  $print [result: ], 1:num, [ 
+]
+]
-- 
cgit 1.4.1-2-gfad0