TcEvBinds) -- ... binding these evidence variables
simplifyInfer apply_mr tau_tvs wanted
| isEmptyBag wanted -- Trivial case is quite common
- = do { zonked_tau_tvs <- zonkTcTyVarsAndFV (varSetElems tau_tvs)
+ = do { zonked_tau_tvs <- zonkTcTyVarsAndFV tau_tvs
; gbl_tvs <- tcGetGlobalTyVars -- Already zonked
; qtvs <- zonkQuantifiedTyVars (varSetElems (zonked_tau_tvs `minusVarSet` gbl_tvs))
; return (qtvs, [], emptyTcEvBinds) }
<- simplifyAsMuchAsPossible SimplInfer zonked_wanted
; gbl_tvs <- tcGetGlobalTyVars
- ; zonked_tau_tvs <- zonkTcTyVarsAndFV (varSetElems tau_tvs)
+ ; zonked_tau_tvs <- zonkTcTyVarsAndFV tau_tvs
; zonked_simples <- mapBagM zonkWantedEvVar simple_wanted
; let qtvs = findQuantifiedTyVars apply_mr zonked_simples zonked_tau_tvs gbl_tvs
(bound, free) | apply_mr = (emptyBag, zonked_simples)
; rhs_binds_var@(EvBindsVar evb_ref _) <- newTcEvBinds
; loc <- getCtLoc (RuleSkol name)
; rhs_binds1 <- simplifyCheck SimplCheck $ unitBag $ WcImplic $
- Implic { ic_env_tvs = emptyVarSet -- No untouchables
+ Implic { ic_untch = emptyVarSet -- No untouchables
, ic_env = emptyNameEnv
, ic_skols = mkVarSet tv_bndrs
, ic_scoped = panic "emitImplication"
--
-- Precondition: everything is zonked by now
solveImplication inert
- imp@(Implic { ic_env_tvs = untch
- , ic_binds = ev_binds
- , ic_skols = skols
- , ic_given = givens
+ imp@(Implic { ic_untch = untch
+ , ic_binds = ev_binds
+ , ic_skols = skols
+ , ic_given = givens
, ic_wanted = wanteds
- , ic_loc = loc })
+ , ic_loc = loc })
= nestImplicTcS ev_binds untch $
do { traceTcS "solveImplication {" (ppr imp)