Major patch to fix reporting of unused imports

[ghc-hetmet.git] / compiler / hsSyn / HsImpExp.lhs

diff --git a/compiler/hsSyn/HsImpExp.lhs b/compiler/hsSyn/HsImpExp.lhs
index c3a3b5b..9465cd2 100644 (file)
--- a/compiler/hsSyn/HsImpExp.lhs
+++ b/compiler/hsSyn/HsImpExp.lhs
@@ -59,16 +59,17 @@ instance (Outputable name) => Outputable (ImportDecl name) where
        pp_qual True    = ptext (sLit "qualified")
 
        pp_as Nothing   = empty
-       pp_as (Just a)  = ptext (sLit "as ") <+> ppr a
+       pp_as (Just a)  = ptext (sLit "as") <+> ppr a
 
        ppr_imp True  = ptext (sLit "{-# SOURCE #-}")
        ppr_imp False = empty
 
-       pp_spec Nothing = empty
-       pp_spec (Just (False, spec))
-                       = parens (interpp'SP spec)
-       pp_spec (Just (True, spec))
-                       = ptext (sLit "hiding") <+> parens (interpp'SP spec)
+       pp_spec Nothing             = empty
+       pp_spec (Just (False, ies)) = ppr_ies ies
+       pp_spec (Just (True,  ies)) = ptext (sLit "hiding") <+> ppr_ies ies
+
+       ppr_ies []  = ptext (sLit "()")
+       ppr_ies ies = char '(' <+> interpp'SP ies <+> char ')'
 \end{code}
 
 %************************************************************************
@@ -80,15 +81,16 @@ instance (Outputable name) => Outputable (ImportDecl name) where
 \begin{code}
 type LIE name = Located (IE name)
 
+-- | Imported or exported entity.
 data IE name
   = IEVar               name
-  | IEThingAbs          name            -- Class/Type (can't tell)
-  | IEThingAll          name            -- Class/Type plus all methods/constructors
-  | IEThingWith         name [name]     -- Class/Type plus some methods/constructors
-  | IEModuleContents    ModuleName      -- (Export Only)
-  | IEGroup             Int (HsDoc name) -- Doc section heading
-  | IEDoc               (HsDoc name)     -- Some documentation
-  | IEDocNamed          String           -- Reference to named doc
+  | IEThingAbs          name            -- ^ Class/Type (can't tell)
+  | IEThingAll          name            -- ^ Class/Type plus all methods/constructors
+  | IEThingWith         name [name]     -- ^ Class/Type plus some methods/constructors
+  | IEModuleContents    ModuleName      -- ^ (Export Only)
+  | IEGroup             Int (HsDoc name) -- ^ Doc section heading
+  | IEDoc               (HsDoc name)     -- ^ Some documentation
+  | IEDocNamed          String           -- ^ Reference to named doc
 \end{code}
 
 \begin{code}