Initial -- dump of stuff

1 files changed, 18 insertions, 0 deletions

diff --git a/pshow.hs b/pshow.hs
new file mode 100644
index 0000000..64fbab1
--- /dev/null
+++ b/pshow.hs
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+{-# LANGUAGE FlexibleInstances, UndecidableInstances #-}
+module PShow(PShow(..), pprint) where
+
+
+class PShow a where
+    pshow :: a -> String
+
+
+pprint :: (PShow a) => a -> IO ()
+pprint = putStrLn . pshow
+
+
+instance PShow String where {pshow = show}
+instance PShow Int where {pshow = show}
+instance PShow Integer where {pshow = show}
+
+instance (PShow a, PShow b) => PShow (a, b) where
+    pshow (a, b) = "(" ++ pshow a ++ "," ++ pshow b ++ ")"