X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2FhsSyn%2FHsImpExp.lhs;h=e483914619369de1da630a0b3daddae08dcff8ab;hb=21a542ddc3d02e0d3a8be28e0aa00796970adb9e;hp=07309d68af04efe54658ca3ef679a195ae03fd1f;hpb=e8e9742681b0ef189f4c18ec36cd47be26327755;p=ghc-hetmet.git

diff --git a/ghc/compiler/hsSyn/HsImpExp.lhs b/ghc/compiler/hsSyn/HsImpExp.lhs
index 07309d6..e483914 100644
--- a/ghc/compiler/hsSyn/HsImpExp.lhs
+++ b/ghc/compiler/hsSyn/HsImpExp.lhs
@@ -1,21 +1,17 @@
 %
-% (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 Pretty
 import SrcLoc		( SrcLoc )
-#if __GLASGOW_HASKELL__ >= 202
-import Name
-#endif
 \end{code}
 
 %************************************************************************
@@ -27,30 +23,34 @@ import Name
 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}
 
 %************************************************************************
@@ -65,7 +65,7 @@ data IE 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    Module		-- (Export Only)
+  | IEModuleContents    ModuleName	-- (Export Only)
 \end{code}
 
 \begin{code}
@@ -74,18 +74,34 @@ 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 (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}