module HsImpExp where
import Module ( ModuleName )
-import HsDoc ( HsDoc )
+import HsDoc ( HsDocString )
import Outputable
import FastString
\begin{code}
type LImportDecl name = Located (ImportDecl name)
+-- | A single Haskell @import@ declaration.
data ImportDecl name
- = ImportDecl (Located ModuleName) -- module name
- Bool -- True <=> {-# SOURCE #-} import
- Bool -- True => qualified
- (Maybe ModuleName) -- as Module
- (Maybe (Bool, [LIE name])) -- (True => hiding, names)
+ = ImportDecl {
+ ideclName :: Located ModuleName, -- ^ Module name.
+ ideclPkgQual :: Maybe FastString, -- ^ Package qualifier.
+ ideclSource :: Bool, -- ^ True <=> {-# SOURCE #-} import
+ ideclQualified :: Bool, -- ^ True => qualified
+ ideclAs :: Maybe ModuleName, -- ^ as Module
+ ideclHiding :: Maybe (Bool, [LIE name]) -- ^ (True => hiding, names)
+ }
\end{code}
\begin{code}
instance (Outputable name) => Outputable (ImportDecl name) where
- ppr (ImportDecl mod from qual as spec)
+ ppr (ImportDecl mod pkg from qual as spec)
= hang (hsep [ptext (sLit "import"), ppr_imp from,
- pp_qual qual, ppr mod, pp_as as])
+ pp_qual qual, pp_pkg pkg, ppr mod, pp_as as])
4 (pp_spec spec)
where
+ pp_pkg Nothing = empty
+ pp_pkg (Just p) = doubleQuotes (ftext p)
+
pp_qual False = empty
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
-ideclName :: ImportDecl name -> Located ModuleName
-ideclName (ImportDecl mod_nm _ _ _ _) = mod_nm
+ ppr_ies [] = ptext (sLit "()")
+ ppr_ies ies = char '(' <+> interpp'SP ies <+> char ')'
\end{code}
%************************************************************************
\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 HsDocString -- ^ Doc section heading
+ | IEDoc HsDocString -- ^ Some documentation
+ | IEDocNamed String -- ^ Reference to named doc
\end{code}
\begin{code}