%
-% (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
-IMP_Ubiq()
+#include "HsVersions.h"
+import Name ( isLexSym )
+import Module ( ModuleName, WhereFrom )
import Outputable
-import PprStyle ( PprStyle(..) )
-import Pretty
import SrcLoc ( SrcLoc )
-#if __GLASGOW_HASKELL__ >= 202
-import Name
-#endif
\end{code}
%************************************************************************
One per \tr{import} declaration in a module.
\begin{code}
data ImportDecl name
- = ImportDecl Module -- module name
+ = ImportDecl ModuleName -- module name
+ WhereFrom
Bool -- True => qualified
- (Maybe Module) -- as Module
+ (Maybe ModuleName) -- as Module
(Maybe (Bool, [IE name])) -- (True => hiding, names)
SrcLoc
\end{code}
\begin{code}
-instance (NamedThing name, Outputable name) => Outputable (ImportDecl name) where
- ppr sty (ImportDecl mod qual as spec _)
- = hang (hsep [ptext SLIT("import"), pp_qual qual, ptext mod, pp_as as])
+instance (Outputable name) => Outputable (ImportDecl name) where
+ 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 = empty
pp_qual True = ptext SLIT("qualified")
pp_as Nothing = empty
- pp_as (Just a) = (<>) (ptext SLIT("as ")) (ptext a)
+ pp_as (Just a) = ptext SLIT("as ") <+> ppr a
pp_spec Nothing = empty
pp_spec (Just (False, spec))
- = parens (interpp'SP sty spec)
+ = parens (interpp'SP spec)
pp_spec (Just (True, spec))
- = (<>) (ptext SLIT("hiding ")) (parens (interpp'SP sty spec))
+ = ptext SLIT("hiding") <+> parens (interpp'SP spec)
+
+ideclName (ImportDecl mod_nm _ _ _ _ _) = mod_nm
\end{code}
%************************************************************************
| 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 (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 (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}
-instance (NamedThing name, Outputable name) => Outputable (IE name) where
- ppr sty (IEVar var) = ppr sty var
- ppr sty (IEThingAbs thing) = ppr sty thing
- ppr sty (IEThingAll thing)
- = hcat [ppr sty thing, text "(..)"]
- ppr sty (IEThingWith thing withs)
- = (<>) (ppr sty thing)
- (parens (fsep (punctuate comma (map (ppr sty) withs))))
- ppr sty (IEModuleContents mod)
- = (<>) (ptext SLIT("module ")) (ptext mod)
+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}