rnLExpr arg `thenM` \ (arg',fvArg) ->
return (HsApp fun' arg', fvFun `plusFV` fvArg)
-rnExpr (OpApp e1 (L op_loc (HsVar op_rdr)) _ e2)
- = do { (e1', fv_e1) <- rnLExpr e1
+rnExpr (OpApp e1 (L op_loc (HsVar op_rdr)) _ e2)
+ = do { (e1', fv_e1) <- rnLExpr e1
; (e2', fv_e2) <- rnLExpr e2
; op_name <- setSrcSpan op_loc (lookupOccRn op_rdr)
; (op', fv_op) <- finishHsVar op_name
; fixity <- lookupFixityRn op_name
; final_e <- mkOpAppRn e1' (L op_loc op') fixity e2'
; return (final_e, fv_e1 `plusFV` fv_op `plusFV` fv_e2) }
+rnExpr (OpApp _ other_op _ _)
+ = failWith (vcat [ hang (ptext (sLit "Operator application with a non-variable operator:"))
+ 2 (ppr other_op)
+ , ptext (sLit "(Probably resulting from a Template Haskell splice)") ])
rnExpr (NegApp e _)
= rnLExpr e `thenM` \ (e', fv_e) ->
-- ...bring them and their fixities into scope
; let bound_names = collectLStmtsBinders (map fst new_lhs_and_fv)
+ -- Fake uses of variables introduced implicitly (warning suppression, see #4404)
+ implicit_uses = lStmtsImplicits (map fst new_lhs_and_fv)
; bindLocalNamesFV bound_names $
addLocalFixities fix_env bound_names $ do
-- (C) do the right-hand-sides and thing-inside
{ segs <- rn_rec_stmts bound_names new_lhs_and_fv
; (res, fvs) <- cont segs
- ; warnUnusedLocalBinds bound_names fvs
+ ; warnUnusedLocalBinds bound_names (fvs `unionNameSets` implicit_uses)
; return (res, fvs) }}
-- get all the fixity decls in any Let stmt