1 files changed, 15 insertions, 0 deletions
diff --git a/ghc/compiler/tests/deSugar/ds005.hs b/ghc/compiler/tests/deSugar/ds005.hs
new file mode 100644
index 0000000000..505d500e3f
--- /dev/null
+++ b/ghc/compiler/tests/deSugar/ds005.hs
@@ -0,0 +1,15 @@
+--!!! ds005 -- mappairs from SLPJ Ch 5'
+--
+-- this simply tests a "typical" example
+
+module MapPairs where
+
+-- from SLPJ, p 78
+mappairs f []     ys     = []
+mappairs f (x:xs) []     = []
+mappairs f (x:xs) (y:ys) = f x y : mappairs f xs ys
+
+-- from p 80
+mappairs' f []     ys     = []
+mappairs' f x      []     = []
+mappairs' f (x:xs) (y:ys) = f x y : mappairs' f xs ys