From 79655b086c036d07806d0c345ffc9e6683891fe4 Mon Sep 17 00:00:00 2001
From: Adam Chlipala <adamc@hcoop.net>
Date: Thu, 14 May 2009 18:13:09 -0400
Subject: Fix nasty bugs with longjmp() looping for uw_set_input(); and bad
 variable indexes for nested JavaScript in jscomp

---
 lib/ur/listPair.ur | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 lib/ur/listPair.ur

(limited to 'lib/ur/listPair.ur')

diff --git a/lib/ur/listPair.ur b/lib/ur/listPair.ur
new file mode 100644
index 00000000..9a56f75a
--- /dev/null
+++ b/lib/ur/listPair.ur
@@ -0,0 +1,10 @@
+fun mapX (a ::: Type) (b ::: Type) (ctx ::: {Unit}) f =
+    let
+        fun mapX' ls1 ls2 =
+            case (ls1, ls2) of
+                ([], []) => <xml/>
+              | (x1 :: ls1, x2 :: ls2) => <xml>{f x1 x2}{mapX' ls1 ls2}</xml>
+              | _ => error <xml>ListPair.mapX: Unequal list lengths</xml>
+    in
+        mapX'
+    end
-- 
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