%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section[HsImpExp]{Abstract syntax: imports, exports, interfaces}
\begin{code}
-#include "HsVersions.h"
-
module HsImpExp where
-import Ubiq
+#include "HsVersions.h"
+import Name ( isLexSym )
+import Module ( ModuleName, WhereFrom )
import Outputable
-import PprStyle ( PprStyle(..) )
-import Pretty
import SrcLoc ( SrcLoc )
\end{code}
One per \tr{import} declaration in a module.
\begin{code}
data ImportDecl name
- = ImportDecl Module -- module name
- Bool -- qualified?
- (Maybe Module) -- as Module
- (Maybe (Bool, [IE name])) -- (hiding?, names)
+ = ImportDecl ModuleName -- module name
+ WhereFrom
+ Bool -- True => qualified
+ (Maybe ModuleName) -- as Module
+ (Maybe (Bool, [IE name])) -- (True => hiding, names)
SrcLoc
\end{code}
\begin{code}
instance (Outputable name) => Outputable (ImportDecl name) where
- ppr sty (ImportDecl mod qual as spec _)
- = ppHang (ppCat [ppStr "import", pp_qual qual, ppPStr mod, pp_as as])
+ ppr (ImportDecl mod from qual as spec _)
+ = hang (hsep [ptext SLIT("import"), ppr from,
+ pp_qual qual, ppr mod, pp_as as])
4 (pp_spec spec)
where
- pp_qual False = ppNil
- pp_qual True = ppStr "qualified"
+ pp_qual False = empty
+ pp_qual True = ptext SLIT("qualified")
- pp_as Nothing = ppNil
- pp_as (Just a) = ppCat [ppStr "as", ppPStr a]
+ pp_as Nothing = empty
+ pp_as (Just a) = ptext SLIT("as ") <+> ppr a
- pp_spec Nothing = ppNil
+ pp_spec Nothing = empty
pp_spec (Just (False, spec))
- = ppBesides [ppStr "(", interpp'SP sty spec, ppStr ")"]
+ = parens (interpp'SP spec)
pp_spec (Just (True, spec))
- = ppBesides [ppStr "hiding (", interpp'SP sty spec, ppStr ")"]
+ = ptext SLIT("hiding") <+> parens (interpp'SP spec)
+ideclName (ImportDecl mod_nm _ _ _ _ _) = mod_nm
\end{code}
%************************************************************************
\subsection{Imported and exported entities}
%* *
%************************************************************************
+
\begin{code}
data IE name
= IEVar name
- | IEThingAbs name -- Constructor/Type/Class (can't tell)
+ | 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 Module -- (Export Only)
+ | IEModuleContents ModuleName -- (Export Only)
+\end{code}
+
+\begin{code}
+ieName :: IE name -> name
+ieName (IEVar n) = n
+ieName (IEThingAbs n) = n
+ieName (IEThingWith n _) = n
+ieName (IEThingAll n) = n
+
+ieNames :: IE a -> [a]
+ieNames (IEVar n ) = [n]
+ieNames (IEThingAbs n ) = [n]
+ieNames (IEThingAll n ) = [n]
+ieNames (IEThingWith n ns) = n:ns
+ieNames (IEModuleContents _ ) = []
\end{code}
\begin{code}
instance (Outputable name) => Outputable (IE name) where
- ppr sty (IEVar var) = ppr sty var
- ppr sty (IEThingAbs thing) = ppr sty thing
- ppr sty (IEThingAll thing)
- = ppBesides [ppr sty thing, ppStr "(..)"]
- ppr sty (IEThingWith thing withs)
- = ppBesides [ppr sty thing, ppLparen, ppInterleave ppComma (map (ppr sty) withs), ppRparen]
- ppr sty (IEModuleContents mod)
- = ppBeside (ppPStr SLIT("module ")) (ppPStr mod)
+ ppr (IEVar var) = ppr_var var
+ ppr (IEThingAbs thing) = ppr thing
+ ppr (IEThingAll thing) = hcat [ppr thing, text "(..)"]
+ ppr (IEThingWith thing withs)
+ = ppr thing <> parens (fsep (punctuate comma (map ppr_var withs)))
+ ppr (IEModuleContents mod)
+ = 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.
\end{code}
+