%
+% (c) The University of Glasgow 2006
% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
-\section{Typecheck arrow notation}
+Typecheck arrow notation
\begin{code}
module TcArrows ( tcProc ) where
import {-# SOURCE #-} TcExpr( tcMonoExpr, tcInferRho )
import HsSyn
-import TcHsSyn ( mkHsDictLet )
-
-import TcMatches ( matchCtxt, tcStmts, tcMDoStmt, tcGuardStmt,
- TcMatchCtxt(..), tcMatchesCase )
-
-import TcType ( TcType, TcTauType, BoxyRhoType, mkFunTys, mkTyConApp,
- mkTyVarTy, mkAppTys, tcSplitTyConApp_maybe, tcEqType,
- SkolemInfo(..) )
-import TcMType ( newFlexiTyVarTy, tcInstSkolTyVars, zonkTcType )
-import TcBinds ( tcLocalBinds )
-import TcSimplify ( tcSimplifyCheck )
-import TcGadt ( Refinement, emptyRefinement, refineResType )
-import TcPat ( tcLamPat, tcLamPats )
-import TcUnify ( checkSigTyVarsWrt, boxySplitAppTy )
+import TcHsSyn
+
+import TcMatches
+
+import TcType
+import TcMType
+import TcBinds
+import TcSimplify
+import TcGadt
+import TcPat
+import TcUnify
import TcRnMonad
-import Inst ( tcSyntaxName )
-import Name ( Name )
-import TysWiredIn ( boolTy, pairTyCon )
+import Inst
+import Name
+import TysWiredIn
import VarSet
-import TysPrim ( alphaTyVar )
-import Type ( Kind, mkArrowKinds, liftedTypeKind, openTypeKind, tyVarsOfTypes )
+import TysPrim
+import Type
-import SrcLoc ( Located(..), noLoc, unLoc )
+import SrcLoc
import Outputable
-import Util ( lengthAtLeast )
-
+import Util
\end{code}
%************************************************************************
tcGuardedCmd env expr stk (reft, res_ty)
= do { let (co, res_ty') = refineResType reft res_ty
; body <- tcCmd env expr (stk, res_ty')
- ; return (mkLHsCoerce co body) }
+ ; return (mkLHsWrap co body) }
tcCmd :: CmdEnv -> LHsExpr Name -> (CmdStack, TcTauType) -> TcM (LHsExpr TcId)
-- The main recursive function
-- the s1..sm and check each cmd
; cmds' <- mapM (tc_cmd w_tv) cmds_w_tys
- ; returnM (HsArrForm (noLoc $ HsCoerce (CoTyLams [w_tv])
+ ; returnM (HsArrForm (noLoc $ HsWrap (WpTyLam w_tv)
(unLoc $ mkHsDictLet inst_binds expr'))
fixity cmds')
}