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diff --git a/ghc/compiler/hsSyn/HsLit.lhs b/ghc/compiler/hsSyn/HsLit.lhs
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+%
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
+%
+\section[HsLit]{Abstract syntax: source-language literals}
+
+\begin{code}
+#include "HsVersions.h"
+
+module HsLit where
+
+import Ubiq{-uitous-}
+
+import Pretty
+\end{code}
+
+\begin{code}
+data HsLit
+  = HsChar	    Char	-- characters
+  | HsCharPrim	    Char	-- unboxed char literals
+  | HsString	    FAST_STRING	-- strings
+  | HsStringPrim    FAST_STRING	-- packed string
+
+  | HsInt	    Integer	-- integer-looking literals
+  | HsFrac	    Rational	-- frac-looking literals
+	-- Up through dict-simplification, HsInt and HsFrac simply
+	-- mean the literal was integral- or fractional-looking; i.e.,
+	-- whether it had an explicit decimal-point in it.  *After*
+	-- dict-simplification, they mean (boxed) "Integer" and
+	-- "Rational" [Ratio Integer], respectively.
+
+	-- Dict-simplification tries to replace such lits w/ more
+	-- specific ones, using the unboxed variants that follow...
+  | HsIntPrim	    Integer	-- unboxed Int literals
+  | HsFloatPrim	    Rational	-- unboxed Float literals
+  | HsDoublePrim    Rational	-- unboxed Double literals
+
+  | HsLitLit	    FAST_STRING	-- to pass ``literal literals'' through to C
+				-- also: "overloaded" type; but
+				-- must resolve to boxed-primitive!
+				-- (WDP 94/10)
+\end{code}
+
+\begin{code}
+negLiteral (HsInt  i) = HsInt  (-i)
+negLiteral (HsFrac f) = HsFrac (-f)
+\end{code}
+
+\begin{code}
+instance Outputable HsLit where
+    ppr sty (HsChar c)		= ppStr (show c)
+    ppr sty (HsCharPrim c)	= ppBeside (ppStr (show c)) (ppChar '#')
+    ppr sty (HsString s)	= ppStr (show s)
+    ppr sty (HsStringPrim s)	= ppBeside (ppStr (show s)) (ppChar '#')
+    ppr sty (HsInt i)		= ppInteger i
+    ppr sty (HsFrac f)		= ppRational f
+    ppr sty (HsFloatPrim f)	= ppBeside (ppRational f) (ppChar '#')
+    ppr sty (HsDoublePrim d)	= ppBeside (ppRational d) (ppStr "##")
+    ppr sty (HsIntPrim i)	= ppBeside (ppInteger i) (ppChar '#')
+    ppr sty (HsLitLit s)	= ppBesides [ppStr "``", ppPStr s, ppStr "''"]
+\end{code}