X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcHsSyn.lhs;h=4c76b428fcaf80de0fafbaca4aea4cecd675abe0;hp=615a7a0ec334c3796421ed78f877fdce035837e9;hb=7fc749a43b4b6b85d234fa95d4928648259584f4;hpb=90dc9026b091be5cca5da4c6cbd3713ecc493361

diff --git a/compiler/typecheck/TcHsSyn.lhs b/compiler/typecheck/TcHsSyn.lhs
index 615a7a0..4c76b42 100644
--- a/compiler/typecheck/TcHsSyn.lhs
+++ b/compiler/typecheck/TcHsSyn.lhs
@@ -9,6 +9,13 @@ This module is an extension of @HsSyn@ syntax, for use in the type
 checker.
 
 \begin{code}
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+--     http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
 module TcHsSyn (
 	mkHsConApp, mkHsDictLet, mkHsApp,
 	hsLitType, hsLPatType, hsPatType, 
@@ -35,12 +42,10 @@ import Id
 import TcRnMonad
 import Type
 import TcType
-import qualified  Type
 import TcMType
 import TysPrim
 import TysWiredIn
 import TyCon
-import {- Kind parts of -} Type
 import Name
 import Var
 import VarSet
@@ -88,11 +93,6 @@ hsPatType (SigPatOut pat ty)	    = ty
 hsPatType (NPat lit _ _ ty)	    = ty
 hsPatType (NPlusKPat id _ _ _)      = idType (unLoc id)
 hsPatType (CoPat _ _ ty)	    = ty
-hsPatType (DictPat ds ms)           = case (ds ++ ms) of
-				       []  -> unitTy
-				       [d] -> idType d
-				       ds  -> mkTupleTy Boxed (length ds) (map idType ds)
-
 
 hsLitType :: HsLit -> TcType
 hsLitType (HsChar c)       = charTy
@@ -304,11 +304,12 @@ zonk_bind env (AbsBinds { abs_tvs = tyvars, abs_dicts = dicts,
 	= zonkIdBndr env global			`thenM` \ new_global ->
 	  mapM zonk_prag prags			`thenM` \ new_prags -> 
 	  returnM (tyvars, new_global, zonkIdOcc env local, new_prags)
-    zonk_prag prag@(InlinePrag {})  = return prag
-    zonk_prag (SpecPrag expr ty ds inl) = do { expr' <- zonkExpr env expr 
-					     ; ty'   <- zonkTcTypeToType env ty
-					     ; let ds' = zonkIdOccs env ds
-					     ; return (SpecPrag expr' ty' ds' inl) }
+    zonk_prag prag@(L _ (InlinePrag {}))  = return prag
+    zonk_prag (L loc (SpecPrag expr ty ds inl))
+	= do { expr' <- zonkExpr env expr 
+	     ; ty'   <- zonkTcTypeToType env ty
+	     ; let ds' = zonkIdOccs env ds
+	     ; return (L loc (SpecPrag expr' ty' ds' inl)) }
 \end{code}
 
 %************************************************************************
@@ -458,16 +459,16 @@ zonkExpr env (ExplicitTuple exprs boxed)
     returnM (ExplicitTuple new_exprs boxed)
 
 zonkExpr env (RecordCon data_con con_expr rbinds)
-  = zonkExpr env con_expr	`thenM` \ new_con_expr ->
-    zonkRbinds env rbinds	`thenM` \ new_rbinds ->
-    returnM (RecordCon data_con new_con_expr new_rbinds)
+  = do	{ new_con_expr <- zonkExpr env con_expr
+	; new_rbinds   <- zonkRecFields env rbinds
+	; return (RecordCon data_con new_con_expr new_rbinds) }
 
-zonkExpr env (RecordUpd expr rbinds in_ty out_ty)
-  = zonkLExpr env expr		`thenM` \ new_expr ->
-    zonkTcTypeToType env in_ty	`thenM` \ new_in_ty ->
-    zonkTcTypeToType env out_ty	`thenM` \ new_out_ty ->
-    zonkRbinds env rbinds	`thenM` \ new_rbinds ->
-    returnM (RecordUpd new_expr new_rbinds new_in_ty new_out_ty)
+zonkExpr env (RecordUpd expr rbinds cons in_tys out_tys)
+  = do	{ new_expr    <- zonkLExpr env expr
+	; new_in_tys  <- mapM (zonkTcTypeToType env) in_tys
+	; new_out_tys <- mapM (zonkTcTypeToType env) out_tys
+	; new_rbinds  <- zonkRecFields env rbinds
+	; return (RecordUpd new_expr new_rbinds cons new_in_tys new_out_tys) }
 
 zonkExpr env (ExprWithTySigOut e ty) 
   = do { e' <- zonkLExpr env e
@@ -645,14 +646,15 @@ zonkStmt env (BindStmt pat expr bind_op fail_op)
 
 
 -------------------------------------------------------------------------
-zonkRbinds :: ZonkEnv -> HsRecordBinds TcId -> TcM (HsRecordBinds Id)
-
-zonkRbinds env rbinds
-  = mappM zonk_rbind rbinds
+zonkRecFields :: ZonkEnv -> HsRecordBinds TcId -> TcM (HsRecordBinds TcId)
+zonkRecFields env (HsRecFields flds dd)
+  = do	{ flds' <- mappM zonk_rbind flds
+	; return (HsRecFields flds' dd) }
   where
-    zonk_rbind (field, expr)
-      = zonkLExpr env expr	`thenM` \ new_expr ->
-	returnM (fmap (zonkIdOcc env) field, new_expr)
+    zonk_rbind fld
+      = do { new_expr <- zonkLExpr env (hsRecFieldArg fld)
+	   ; return (fld { hsRecFieldArg = new_expr }) }
+	-- Field selectors have declared types; hence no zonking
 
 -------------------------------------------------------------------------
 mapIPNameTc :: (a -> TcM b) -> IPName a -> TcM (IPName b)
@@ -752,11 +754,6 @@ zonk_pat env (NPlusKPat (L loc n) lit e1 e2)
 	; e2' <- zonkExpr env e2
 	; return (extendZonkEnv1 env n', NPlusKPat (L loc n') lit' e1' e2') }
 
-zonk_pat env (DictPat ds ms)
-  = do	{ ds' <- zonkIdBndrs env ds
-	; ms' <- zonkIdBndrs env ms
-	; return (extendZonkEnv env (ds' ++ ms'), DictPat ds' ms') }
-
 zonk_pat env (CoPat co_fn pat ty) 
   = do { (env', co_fn') <- zonkCoFn env co_fn
        ; (env'', pat') <- zonkPat env' (noLoc pat)
@@ -775,11 +772,11 @@ zonkConStuff env (InfixCon p1 p2)
 	; (env', p2') <- zonkPat env1 p2
 	; return (env', InfixCon p1' p2') }
 
-zonkConStuff env (RecCon rpats)
-  = do	{ let (fields, pats) = unzip [ (f, p) | HsRecField f p _  <- rpats ]
-	; (env', pats') <- zonkPats env pats
-	; let recCon = RecCon [ mkRecField f p | (f, p) <- zip fields pats' ]
-	; returnM (env', recCon) }
+zonkConStuff env (RecCon (HsRecFields rpats dd))
+  = do	{ (env', pats') <- zonkPats env (map hsRecFieldArg rpats)
+	; let rpats' = zipWith (\rp p' -> rp { hsRecFieldArg = p' }) rpats pats'
+	; returnM (env', RecCon (HsRecFields rpats' dd)) }
+	-- Field selectors have declared types; hence no zonking
 
 ---------------------------
 zonkPats env []		= return (env, [])