+ = ptext SLIT("module") <+> ppr mod
+
+ppr_var v | isOperator v = parens (ppr v)
+ | otherwise = ppr v
+\end{code}
+
+\begin{code}
+isOperator :: Outputable a => a -> Bool
+isOperator v = isLexSym (_PK_ (showSDocUnqual (ppr v)))
+ -- We use (showSDoc (ppr v)), rather than isSymOcc (getOccName v) simply so
+ -- that we don't need NamedThing in the context of all these functions.
+ -- Gruesome, but simple.