instance Outputable name => Outputable (HsPred name) where
ppr (HsPClass clas tys) = ppr clas <+> hsep (map pprParendHsType tys)
- ppr (HsPIParam n ty) = hsep [{- char '?' <> -} ppr n, text "::", ppr ty]
+ ppr (HsPIParam n ty) = hsep [char '?' <> ppr n, text "::", ppr ty]
pprHsTyVarBndr :: Outputable name => name -> Kind -> SDoc
pprHsTyVarBndr name kind | kind == boxedTypeKind = ppr name
pprPred :: PredType -> SDoc
pprPred (Class clas tys) = pprConstraint clas tys
-pprPred (IParam n ty) = hsep [ppr n, ptext SLIT("::"), ppr ty]
+pprPred (IParam n ty) = hsep [ptext SLIT("?") <> ppr n,
+ ptext SLIT("::"), ppr ty]
pprConstraint :: Class -> [Type] -> SDoc
pprConstraint clas tys = ppr clas <+> hsep (map pprParendType tys)
pp_tyvars = hsep (map (pBndr env LambdaBind) tyvars)
ppr_theta [] = empty
- ppr_theta theta = parens (hsep (punctuate comma (map ppr_pred theta)))
+ ppr_theta theta = parens (hsep (punctuate comma (map (ppr_pred env) theta)))
<+> ptext SLIT("=>")
- ppr_pred (Class clas tys) = ppr clas <+> hsep (map (ppr_ty env tYCON_PREC) tys)
- ppr_pred (IParam n ty) = hsep [{- char '?' <> -} ppr n, text "::",
- ppr_ty env tYCON_PREC ty]
ppr_ty env ctxt_prec (FunTy ty1 ty2)
= maybeParen ctxt_prec fUN_PREC (sep (ppr_ty env fUN_PREC ty1 : pp_rest ty2))