% (c) The University of Glasgow, 1997-2006
%
\begin{code}
+{-# OPTIONS -fno-warn-unused-imports #-}
+-- XXX GHC 6.9 seems to be confused by unpackCString# being used only in
+-- a RULE
+
+{-# OPTIONS_GHC -O -funbox-strict-fields #-}
+-- We always optimise this, otherwise performance of a non-optimised
+-- compiler is severely affected
+
{-
FastString: A compact, hash-consed, representation of character strings.
Comparison is O(1), and you can get a Unique from them.