Big tidy-up of deriving code

[ghc-hetmet.git] / compiler / typecheck / TcGenDeriv.lhs

diff --git a/compiler/typecheck/TcGenDeriv.lhs b/compiler/typecheck/TcGenDeriv.lhs
index 4291c4b..20425a7 100644 (file)
--- a/compiler/typecheck/TcGenDeriv.lhs
+++ b/compiler/typecheck/TcGenDeriv.lhs
@@ -1,7 +1,9 @@
 %
+% (c) The University of Glasgow 2006
 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
 %
-\section[TcGenDeriv]{Generating derived instance declarations}
+
+TcGenDeriv: Generating derived instance declarations
 
 This module is nominally ``subordinate'' to @TcDeriv@, which is the
 ``official'' interface to deriving-related things.
@@ -29,37 +31,29 @@ module TcGenDeriv (
 #include "HsVersions.h"
 
 import HsSyn
-import RdrName         ( RdrName, mkVarUnqual, getRdrName, mkRdrUnqual,
-                          mkDerivedRdrName )
-import BasicTypes      ( Fixity(..), maxPrecedence, Boxity(..) )
-import DataCon         ( isNullarySrcDataCon, dataConTag,
-                         dataConOrigArgTys, dataConSourceArity, fIRST_TAG,
-                         DataCon, dataConName, dataConIsInfix,
-                         dataConFieldLabels )
-import Name            ( getOccString, getSrcLoc, Name, NamedThing(..) )
-
-import HscTypes                ( FixityEnv, lookupFixity )
+import RdrName
+import BasicTypes
+import DataCon
+import Name
+
+import HscTypes
 import PrelInfo
 import PrelNames
-import MkId            ( eRROR_ID )
-import PrimOp          ( PrimOp(..) )
-import SrcLoc          ( Located(..), noLoc, srcLocSpan )
-import TyCon           ( TyCon, isNewTyCon, tyConDataCons, isEnumerationTyCon, tyConArity,
-                         maybeTyConSingleCon, tyConFamilySize, tyConTyVars, tyConName
-                       )
-import TcType          ( isUnLiftedType, tcEqType, Type )
-import TysPrim         ( charPrimTy, intPrimTy, wordPrimTy, addrPrimTy, floatPrimTy, doublePrimTy,
-                         intPrimTyCon )
-import TysWiredIn      ( charDataCon, intDataCon, floatDataCon, doubleDataCon,
-                         intDataCon_RDR, true_RDR, false_RDR )
-import Util            ( zipWithEqual, isSingleton,
-                         zipWith3Equal, nOfThem, zipEqual )
+import MkId
+import PrimOp
+import SrcLoc
+import TyCon
+import TcType
+import TysPrim
+import TysWiredIn
+import Util
 import Constants
-import List            ( partition, intersperse )
 import Outputable
 import FastString
 import OccName
 import Bag
+
+import Data.List       ( partition, intersperse )
 \end{code}
 
 %************************************************************************
@@ -1214,8 +1208,7 @@ gen_tag_n_con_monobind (rdr_name, tycon, GenCon2Tag)
                                              (nlHsApp (nlHsVar getTag_RDR) a_Expr)))
                        (noLoc (mkExplicitHsForAllTy (map (noLoc.UserTyVar) tvs) (noLoc []) con2tag_ty))
 
-    con2tag_ty = foldl nlHsAppTy (nlHsTyVar (getRdrName tycon)) 
-                      (map nlHsTyVar tvs)
+    con2tag_ty = nlHsTyConApp (getRdrName tycon) (map nlHsTyVar tvs)
                `nlHsFunTy` 
                nlHsTyVar (getRdrName intPrimTyCon)