More import tidying and fixing the stage 2 build

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

diff --git a/compiler/hsSyn/HsUtils.lhs b/compiler/hsSyn/HsUtils.lhs
index da0e24c..be4431d 100644 (file)
--- a/compiler/hsSyn/HsUtils.lhs
+++ b/compiler/hsSyn/HsUtils.lhs
@@ -1,5 +1,5 @@
 %
-% (c) The University of Glasgow, 1992-2003
+% (c) The University of Glasgow, 1992-2006
 %
 
 Here we collect a variety of helper functions that construct or
@@ -22,18 +22,19 @@ import HsExpr
 import HsPat
 import HsTypes 
 import HsLit
-
-import RdrName         ( RdrName, getRdrName, mkRdrUnqual )
-import Var             ( Id )
-import Type            ( Type )
-import DataCon         ( DataCon, dataConWrapId, dataConSourceArity )
-import OccName         ( mkVarOccFS )
-import Name            ( Name )
-import BasicTypes      ( RecFlag(..) )
+import HsDecls
+
+import RdrName
+import Var
+import Type
+import DataCon
+import OccName
+import Name
+import BasicTypes
 import SrcLoc
-import FastString      ( mkFastString )
+import FastString
 import Outputable
-import Util            ( nOfThem )
+import Util
 import Bag
 \end{code}
 
@@ -416,3 +417,24 @@ collect_pat (TuplePat pats _ _) acc = foldr collect_lpat acc pats
 collect_pat (ConPatIn c ps)     acc = foldr collect_lpat acc (hsConArgs ps)
 collect_pat other              acc = acc       -- Literals, vars, wildcard
 \end{code}
+
+%************************************************************************
+%*                                                                     *
+%*     Getting the main binder name of a top declaration
+%*                                                                     *
+%************************************************************************
+
+\begin{code}
+
+getMainDeclBinder :: HsDecl name -> Maybe name
+getMainDeclBinder (TyClD d) = Just (tcdName d)
+getMainDeclBinder (ValD d)
+   = case collectAcc d [] of
+        []       -> Nothing   -- see rn003
+        (name:_) -> Just (unLoc name)
+getMainDeclBinder (SigD d) = sigNameNoLoc d
+getMainDeclBinder (ForD (ForeignImport name _ _)) = Just (unLoc name)
+getMainDeclBinder (ForD (ForeignExport name _ _)) = Just (unLoc name)
+getMainDeclBinder _ = Nothing
+
+\end{code}