[commit: ghc] wip/rae: Remove tcInfExpr (#9404) (55fae5a)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : wip/rae
Link       : http://ghc.haskell.org/trac/ghc/changeset/55fae5a69d279c1d4210ee39108093a1f31f60bf/ghc

>---------------------------------------------------------------

commit 55fae5a69d279c1d4210ee39108093a1f31f60bf
Author: Richard Eisenberg <eir at cis.upenn.edu>
Date:   Sun Aug 3 21:29:51 2014 -0400

    Remove tcInfExpr (#9404)
    
    It seems that tcInfExpr (a special case for inferring a type
    without a known result type) is unnecessary. This removes it
    in favor of using the main tcExpr exclusively.


>---------------------------------------------------------------

55fae5a69d279c1d4210ee39108093a1f31f60bf
 compiler/typecheck/TcExpr.lhs | 26 +-------------------------
 1 file changed, 1 insertion(+), 25 deletions(-)

diff --git a/compiler/typecheck/TcExpr.lhs b/compiler/typecheck/TcExpr.lhs
index 7e6c495..b23e622 100644
--- a/compiler/typecheck/TcExpr.lhs
+++ b/compiler/typecheck/TcExpr.lhs
@@ -125,16 +125,9 @@ tcInferRho expr = addErrCtxt (exprCtxt expr) (tcInferRhoNC expr)
 
 tcInferRhoNC (L loc expr)
   = setSrcSpan loc $
-    do { (expr', rho) <- tcInfExpr expr
+    do { (expr', rho) <- tcInfer (tcExpr expr)
        ; return (L loc expr', rho) }
 
-tcInfExpr :: HsExpr Name -> TcM (HsExpr TcId, TcRhoType)
-tcInfExpr (HsVar f)     = tcInferId f
-tcInfExpr (HsPar e)     = do { (e', ty) <- tcInferRhoNC e
-                             ; return (HsPar e', ty) }
-tcInfExpr (HsApp e1 e2) = tcInferApp e1 [e2]
-tcInfExpr e             = tcInfer (tcExpr e)
-
 tcHole :: OccName -> TcRhoType -> TcM (HsExpr TcId)
 tcHole occ res_ty
  = do { ty <- newFlexiTyVarTy liftedTypeKind
@@ -937,23 +930,6 @@ mk_app_msg fun = sep [ ptext (sLit "The function") <+> quotes (ppr fun)
                      , ptext (sLit "is applied to")]
 
 ----------------
-tcInferApp :: LHsExpr Name -> [LHsExpr Name] -- Function and args
-           -> TcM (HsExpr TcId, TcRhoType) -- Translated fun and args
-
-tcInferApp (L _ (HsPar e))     args = tcInferApp e args
-tcInferApp (L _ (HsApp e1 e2)) args = tcInferApp e1 (e2:args)
-tcInferApp fun args
-  = -- Very like the tcApp version, except that there is
-    -- no expected result type passed in
-    do  { (fun1, fun_tau) <- tcInferFun fun
-        ; (co_fun, expected_arg_tys, actual_res_ty)
-              <- matchExpectedFunTys (mk_app_msg fun) (length args) fun_tau
-        ; args1 <- tcArgs fun args expected_arg_tys
-        ; let fun2 = mkLHsWrapCo co_fun fun1
-              app  = foldl mkHsApp fun2 args1
-        ; return (unLoc app, actual_res_ty) }
-
-----------------
 tcInferFun :: LHsExpr Name -> TcM (LHsExpr TcId, TcRhoType)
 -- Infer and instantiate the type of a function
 tcInferFun (L loc (HsVar name))