{-# LANGUAGE LambdaCase          #-}
{-# LANGUAGE NamedFieldPuns      #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# OPTIONS_GHC -Wno-incomplete-uni-patterns   #-}
{-# OPTIONS_GHC -Wno-incomplete-record-updates #-}
{-# LANGUAGE ParallelListComp #-}
module GHC.Tc.Errors(
       reportUnsolved, reportAllUnsolved, warnAllUnsolved,
       warnDefaulting,
       
       solverReportMsg_ExpectedActuals,
       solverReportInfo_ExpectedActuals
  ) where
import GHC.Prelude
import GHC.Driver.Env (hsc_units)
import GHC.Driver.Session
import GHC.Driver.Ppr
import GHC.Driver.Config.Diagnostic
import GHC.Rename.Unbound
import GHC.Tc.Types
import GHC.Tc.Utils.Monad
import GHC.Tc.Errors.Types
import GHC.Tc.Errors.Ppr
import GHC.Tc.Types.Constraint
import GHC.Tc.Utils.TcMType
import GHC.Tc.Utils.Env( tcInitTidyEnv )
import GHC.Tc.Utils.TcType
import GHC.Tc.Utils.Unify ( checkTyVarEq )
import GHC.Tc.Types.Origin
import GHC.Tc.Types.Evidence
import GHC.Tc.Types.EvTerm
import GHC.Tc.Instance.Family
import GHC.Tc.Utils.Instantiate
import {-# SOURCE #-} GHC.Tc.Errors.Hole ( findValidHoleFits, getHoleFitDispConfig, pprHoleFit )
import GHC.Types.Name
import GHC.Types.Name.Reader ( lookupGRE_Name, GlobalRdrEnv, mkRdrUnqual
                             , emptyLocalRdrEnv, lookupGlobalRdrEnv , lookupLocalRdrOcc )
import GHC.Types.Id
import GHC.Types.Var
import GHC.Types.Var.Set
import GHC.Types.Var.Env
import GHC.Types.Name.Env
import GHC.Types.SrcLoc
import GHC.Types.Basic
import GHC.Types.Error
import qualified GHC.Types.Unique.Map as UM
import GHC.Unit.Module
import qualified GHC.LanguageExtensions as LangExt
import GHC.Core.Predicate
import GHC.Core.Type
import GHC.Core.Coercion
import GHC.Core.TyCo.Ppr  ( pprTyVars
                           )
import GHC.Core.InstEnv
import GHC.Core.TyCon
import GHC.Core.DataCon
import GHC.Utils.Error  (diagReasonSeverity,  pprLocMsgEnvelope )
import GHC.Utils.Misc
import GHC.Utils.Outputable as O
import GHC.Utils.Panic
import GHC.Utils.Panic.Plain
import GHC.Utils.FV ( fvVarList, unionFV )
import GHC.Data.Bag
import GHC.Data.List.SetOps ( equivClasses, nubOrdBy )
import GHC.Data.Maybe
import qualified GHC.Data.Strict as Strict
import Control.Monad    ( unless, when, foldM, forM_ )
import Data.Foldable    ( toList )
import Data.Function    ( on )
import Data.List        ( partition, sort, sortBy )
import Data.List.NonEmpty ( NonEmpty(..), (<|) )
import qualified Data.List.NonEmpty as NE ( map, reverse )
import Data.Ord         ( comparing )
import qualified Data.Semigroup as S
reportUnsolved :: WantedConstraints -> TcM (Bag EvBind)
reportUnsolved :: WantedConstraints -> TcM (Bag EvBind)
reportUnsolved WantedConstraints
wanted
  = do { EvBindsVar
binds_var <- TcM EvBindsVar
newTcEvBinds
       ; Bool
defer_errors <- GeneralFlag -> TcRnIf TcGblEnv TcLclEnv Bool
forall gbl lcl. GeneralFlag -> TcRnIf gbl lcl Bool
goptM GeneralFlag
Opt_DeferTypeErrors
       ; let type_errors :: DiagnosticReason
type_errors | Bool -> Bool
not Bool
defer_errors = DiagnosticReason
ErrorWithoutFlag
                         | Bool
otherwise        = WarningFlag -> DiagnosticReason
WarningWithFlag WarningFlag
Opt_WarnDeferredTypeErrors
       ; Bool
defer_holes <- GeneralFlag -> TcRnIf TcGblEnv TcLclEnv Bool
forall gbl lcl. GeneralFlag -> TcRnIf gbl lcl Bool
goptM GeneralFlag
Opt_DeferTypedHoles
       ; let expr_holes :: DiagnosticReason
expr_holes | Bool -> Bool
not Bool
defer_holes = DiagnosticReason
ErrorWithoutFlag
                        | Bool
otherwise       = WarningFlag -> DiagnosticReason
WarningWithFlag WarningFlag
Opt_WarnTypedHoles
       ; Bool
partial_sigs      <- Extension -> TcRnIf TcGblEnv TcLclEnv Bool
forall gbl lcl. Extension -> TcRnIf gbl lcl Bool
xoptM Extension
LangExt.PartialTypeSignatures
       ; let type_holes :: DiagnosticReason
type_holes | Bool -> Bool
not Bool
partial_sigs
                        = DiagnosticReason
ErrorWithoutFlag
                        | Bool
otherwise
                        = WarningFlag -> DiagnosticReason
WarningWithFlag WarningFlag
Opt_WarnPartialTypeSignatures
       ; Bool
defer_out_of_scope <- GeneralFlag -> TcRnIf TcGblEnv TcLclEnv Bool
forall gbl lcl. GeneralFlag -> TcRnIf gbl lcl Bool
goptM GeneralFlag
Opt_DeferOutOfScopeVariables
       ; let out_of_scope_holes :: DiagnosticReason
out_of_scope_holes | Bool -> Bool
not Bool
defer_out_of_scope
                                = DiagnosticReason
ErrorWithoutFlag
                                | Bool
otherwise
                                = WarningFlag -> DiagnosticReason
WarningWithFlag WarningFlag
Opt_WarnDeferredOutOfScopeVariables
       ; DiagnosticReason
-> DiagnosticReason
-> DiagnosticReason
-> DiagnosticReason
-> EvBindsVar
-> WantedConstraints
-> TcM ()
report_unsolved DiagnosticReason
type_errors DiagnosticReason
expr_holes
                         DiagnosticReason
type_holes DiagnosticReason
out_of_scope_holes
                         EvBindsVar
binds_var WantedConstraints
wanted
       ; EvBindMap
ev_binds <- EvBindsVar -> TcM EvBindMap
getTcEvBindsMap EvBindsVar
binds_var
       ; Bag EvBind -> TcM (Bag EvBind)
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (EvBindMap -> Bag EvBind
evBindMapBinds EvBindMap
ev_binds)}
reportAllUnsolved :: WantedConstraints -> TcM ()
reportAllUnsolved :: WantedConstraints -> TcM ()
reportAllUnsolved WantedConstraints
wanted
  = do { EvBindsVar
ev_binds <- TcM EvBindsVar
newNoTcEvBinds
       ; Bool
partial_sigs      <- Extension -> TcRnIf TcGblEnv TcLclEnv Bool
forall gbl lcl. Extension -> TcRnIf gbl lcl Bool
xoptM Extension
LangExt.PartialTypeSignatures
       ; let type_holes :: DiagnosticReason
type_holes | Bool -> Bool
not Bool
partial_sigs  = DiagnosticReason
ErrorWithoutFlag
                        | Bool
otherwise         = WarningFlag -> DiagnosticReason
WarningWithFlag WarningFlag
Opt_WarnPartialTypeSignatures
       ; DiagnosticReason
-> DiagnosticReason
-> DiagnosticReason
-> DiagnosticReason
-> EvBindsVar
-> WantedConstraints
-> TcM ()
report_unsolved DiagnosticReason
ErrorWithoutFlag
                         DiagnosticReason
ErrorWithoutFlag DiagnosticReason
type_holes DiagnosticReason
ErrorWithoutFlag
                         EvBindsVar
ev_binds WantedConstraints
wanted }
warnAllUnsolved :: WantedConstraints -> TcM ()
warnAllUnsolved :: WantedConstraints -> TcM ()
warnAllUnsolved WantedConstraints
wanted
  = do { EvBindsVar
ev_binds <- TcM EvBindsVar
newTcEvBinds
       ; DiagnosticReason
-> DiagnosticReason
-> DiagnosticReason
-> DiagnosticReason
-> EvBindsVar
-> WantedConstraints
-> TcM ()
report_unsolved DiagnosticReason
WarningWithoutFlag
                         DiagnosticReason
WarningWithoutFlag
                         DiagnosticReason
WarningWithoutFlag
                         DiagnosticReason
WarningWithoutFlag
                         EvBindsVar
ev_binds WantedConstraints
wanted }
report_unsolved :: DiagnosticReason 
                -> DiagnosticReason 
                -> DiagnosticReason 
                -> DiagnosticReason 
                -> EvBindsVar        
                -> WantedConstraints -> TcM ()
report_unsolved :: DiagnosticReason
-> DiagnosticReason
-> DiagnosticReason
-> DiagnosticReason
-> EvBindsVar
-> WantedConstraints
-> TcM ()
report_unsolved DiagnosticReason
type_errors DiagnosticReason
expr_holes
    DiagnosticReason
type_holes DiagnosticReason
out_of_scope_holes EvBindsVar
binds_var WantedConstraints
wanted
  | WantedConstraints -> Bool
isEmptyWC WantedConstraints
wanted
  = () -> TcM ()
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return ()
  | Bool
otherwise
  = do { String -> SDoc -> TcM ()
traceTc String
"reportUnsolved {" (SDoc -> TcM ()) -> SDoc -> TcM ()
forall a b. (a -> b) -> a -> b
$
         [SDoc] -> SDoc
vcat [ String -> SDoc
text String
"type errors:" SDoc -> SDoc -> SDoc
<+> DiagnosticReason -> SDoc
forall a. Outputable a => a -> SDoc
ppr DiagnosticReason
type_errors
              , String -> SDoc
text String
"expr holes:" SDoc -> SDoc -> SDoc
<+> DiagnosticReason -> SDoc
forall a. Outputable a => a -> SDoc
ppr DiagnosticReason
expr_holes
              , String -> SDoc
text String
"type holes:" SDoc -> SDoc -> SDoc
<+> DiagnosticReason -> SDoc
forall a. Outputable a => a -> SDoc
ppr DiagnosticReason
type_holes
              , String -> SDoc
text String
"scope holes:" SDoc -> SDoc -> SDoc
<+> DiagnosticReason -> SDoc
forall a. Outputable a => a -> SDoc
ppr DiagnosticReason
out_of_scope_holes ]
       ; String -> SDoc -> TcM ()
traceTc String
"reportUnsolved (before zonking and tidying)" (WantedConstraints -> SDoc
forall a. Outputable a => a -> SDoc
ppr WantedConstraints
wanted)
       ; WantedConstraints
wanted <- WantedConstraints -> TcM WantedConstraints
zonkWC WantedConstraints
wanted   
       ; let tidy_env :: TidyEnv
tidy_env = TidyEnv -> [TcId] -> TidyEnv
tidyFreeTyCoVars TidyEnv
emptyTidyEnv [TcId]
free_tvs
             free_tvs :: [TcId]
free_tvs = (TcId -> Bool) -> [TcId] -> [TcId]
forall a. (a -> Bool) -> [a] -> [a]
filterOut TcId -> Bool
isCoVar ([TcId] -> [TcId]) -> [TcId] -> [TcId]
forall a b. (a -> b) -> a -> b
$
                        WantedConstraints -> [TcId]
tyCoVarsOfWCList WantedConstraints
wanted
                        
                        
                        
                        
                        
       ; String -> SDoc -> TcM ()
traceTc String
"reportUnsolved (after zonking):" (SDoc -> TcM ()) -> SDoc -> TcM ()
forall a b. (a -> b) -> a -> b
$
         [SDoc] -> SDoc
vcat [ String -> SDoc
text String
"Free tyvars:" SDoc -> SDoc -> SDoc
<+> [TcId] -> SDoc
pprTyVars [TcId]
free_tvs
              , String -> SDoc
text String
"Tidy env:" SDoc -> SDoc -> SDoc
<+> TidyEnv -> SDoc
forall a. Outputable a => a -> SDoc
ppr TidyEnv
tidy_env
              , String -> SDoc
text String
"Wanted:" SDoc -> SDoc -> SDoc
<+> WantedConstraints -> SDoc
forall a. Outputable a => a -> SDoc
ppr WantedConstraints
wanted ]
       ; Bool
warn_redundant <- WarningFlag -> TcRnIf TcGblEnv TcLclEnv Bool
forall gbl lcl. WarningFlag -> TcRnIf gbl lcl Bool
woptM WarningFlag
Opt_WarnRedundantConstraints
       ; Bool
exp_syns <- GeneralFlag -> TcRnIf TcGblEnv TcLclEnv Bool
forall gbl lcl. GeneralFlag -> TcRnIf gbl lcl Bool
goptM GeneralFlag
Opt_PrintExpandedSynonyms
       ; let err_ctxt :: SolverReportErrCtxt
err_ctxt = CEC { cec_encl :: [Implication]
cec_encl  = []
                            , cec_tidy :: TidyEnv
cec_tidy  = TidyEnv
tidy_env
                            , cec_defer_type_errors :: DiagnosticReason
cec_defer_type_errors = DiagnosticReason
type_errors
                            , cec_expr_holes :: DiagnosticReason
cec_expr_holes = DiagnosticReason
expr_holes
                            , cec_type_holes :: DiagnosticReason
cec_type_holes = DiagnosticReason
type_holes
                            , cec_out_of_scope_holes :: DiagnosticReason
cec_out_of_scope_holes = DiagnosticReason
out_of_scope_holes
                            , cec_suppress :: Bool
cec_suppress = WantedConstraints -> Bool
insolubleWC WantedConstraints
wanted
                                 
                                 
                                 
                                 
                                 
                            , cec_warn_redundant :: Bool
cec_warn_redundant = Bool
warn_redundant
                            , cec_expand_syns :: Bool
cec_expand_syns = Bool
exp_syns
                            , cec_binds :: EvBindsVar
cec_binds    = EvBindsVar
binds_var }
       ; TcLevel
tc_lvl <- TcM TcLevel
getTcLevel
       ; SolverReportErrCtxt -> TcLevel -> WantedConstraints -> TcM ()
reportWanteds SolverReportErrCtxt
err_ctxt TcLevel
tc_lvl WantedConstraints
wanted
       ; String -> SDoc -> TcM ()
traceTc String
"reportUnsolved }" SDoc
empty }
important :: SolverReportErrCtxt -> TcSolverReportMsg -> SolverReport
important :: SolverReportErrCtxt -> TcSolverReportMsg -> SolverReport
important SolverReportErrCtxt
ctxt TcSolverReportMsg
doc = SolverReport
forall a. Monoid a => a
mempty { sr_important_msgs :: [SolverReportWithCtxt]
sr_important_msgs = [SolverReportErrCtxt -> TcSolverReportMsg -> SolverReportWithCtxt
SolverReportWithCtxt SolverReportErrCtxt
ctxt TcSolverReportMsg
doc] }
mk_relevant_bindings :: RelevantBindings -> SolverReport
mk_relevant_bindings :: RelevantBindings -> SolverReport
mk_relevant_bindings RelevantBindings
binds = SolverReport
forall a. Monoid a => a
mempty { sr_supplementary :: [SolverReportSupplementary]
sr_supplementary = [RelevantBindings -> SolverReportSupplementary
SupplementaryBindings RelevantBindings
binds] }
mk_report_hints :: [GhcHint] -> SolverReport
mk_report_hints :: [GhcHint] -> SolverReport
mk_report_hints [GhcHint]
hints = SolverReport
forall a. Monoid a => a
mempty { sr_hints :: [GhcHint]
sr_hints = [GhcHint]
hints }
deferringAnyBindings :: SolverReportErrCtxt -> Bool
  
deferringAnyBindings :: SolverReportErrCtxt -> Bool
deferringAnyBindings (CEC { cec_defer_type_errors :: SolverReportErrCtxt -> DiagnosticReason
cec_defer_type_errors  = DiagnosticReason
ErrorWithoutFlag
                          , cec_expr_holes :: SolverReportErrCtxt -> DiagnosticReason
cec_expr_holes         = DiagnosticReason
ErrorWithoutFlag
                          , cec_out_of_scope_holes :: SolverReportErrCtxt -> DiagnosticReason
cec_out_of_scope_holes = DiagnosticReason
ErrorWithoutFlag }) = Bool
False
deferringAnyBindings SolverReportErrCtxt
_                                                   = Bool
True
maybeSwitchOffDefer :: EvBindsVar -> SolverReportErrCtxt -> SolverReportErrCtxt
maybeSwitchOffDefer :: EvBindsVar -> SolverReportErrCtxt -> SolverReportErrCtxt
maybeSwitchOffDefer EvBindsVar
evb SolverReportErrCtxt
ctxt
 | CoEvBindsVar{} <- EvBindsVar
evb
 = SolverReportErrCtxt
ctxt { cec_defer_type_errors :: DiagnosticReason
cec_defer_type_errors  = DiagnosticReason
ErrorWithoutFlag
        , cec_expr_holes :: DiagnosticReason
cec_expr_holes         = DiagnosticReason
ErrorWithoutFlag
        , cec_out_of_scope_holes :: DiagnosticReason
cec_out_of_scope_holes = DiagnosticReason
ErrorWithoutFlag }
 | Bool
otherwise
 = SolverReportErrCtxt
ctxt
reportImplic :: SolverReportErrCtxt -> Implication -> TcM ()
reportImplic :: SolverReportErrCtxt -> Implication -> TcM ()
reportImplic SolverReportErrCtxt
ctxt implic :: Implication
implic@(Implic { ic_skols :: Implication -> [TcId]
ic_skols  = [TcId]
tvs
                                 , ic_given :: Implication -> [TcId]
ic_given  = [TcId]
given
                                 , ic_wanted :: Implication -> WantedConstraints
ic_wanted = WantedConstraints
wanted, ic_binds :: Implication -> EvBindsVar
ic_binds = EvBindsVar
evb
                                 , ic_status :: Implication -> ImplicStatus
ic_status = ImplicStatus
status, ic_info :: Implication -> SkolemInfoAnon
ic_info = SkolemInfoAnon
info
                                 , ic_env :: Implication -> TcLclEnv
ic_env    = TcLclEnv
tcl_env
                                 , ic_tclvl :: Implication -> TcLevel
ic_tclvl  = TcLevel
tc_lvl })
  | SkolemInfoAnon
BracketSkol <- SkolemInfoAnon
info
  , Bool -> Bool
not Bool
insoluble
  = () -> TcM ()
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return ()        
                     
                     
                     
  | Bool
otherwise
  = do { String -> SDoc -> TcM ()
traceTc String
"reportImplic" (SDoc -> TcM ()) -> SDoc -> TcM ()
forall a b. (a -> b) -> a -> b
$ [SDoc] -> SDoc
vcat
           [ String -> SDoc
text String
"tidy env:"   SDoc -> SDoc -> SDoc
<+> TidyEnv -> SDoc
forall a. Outputable a => a -> SDoc
ppr (SolverReportErrCtxt -> TidyEnv
cec_tidy SolverReportErrCtxt
ctxt)
           , String -> SDoc
text String
"skols:     " SDoc -> SDoc -> SDoc
<+> [TcId] -> SDoc
pprTyVars [TcId]
tvs
           , String -> SDoc
text String
"tidy skols:" SDoc -> SDoc -> SDoc
<+> [TcId] -> SDoc
pprTyVars [TcId]
tvs' ]
       ; Bool -> TcM () -> TcM ()
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
when Bool
bad_telescope (TcM () -> TcM ()) -> TcM () -> TcM ()
forall a b. (a -> b) -> a -> b
$ SolverReportErrCtxt
-> TcLclEnv -> SkolemInfoAnon -> [TcId] -> TcM ()
reportBadTelescope SolverReportErrCtxt
ctxt TcLclEnv
tcl_env SkolemInfoAnon
info [TcId]
tvs
               
               
       ; SolverReportErrCtxt -> TcLevel -> WantedConstraints -> TcM ()
reportWanteds SolverReportErrCtxt
ctxt' TcLevel
tc_lvl WantedConstraints
wanted
       ; Bool -> TcM () -> TcM ()
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
when (SolverReportErrCtxt -> Bool
cec_warn_redundant SolverReportErrCtxt
ctxt) (TcM () -> TcM ()) -> TcM () -> TcM ()
forall a b. (a -> b) -> a -> b
$
         SolverReportErrCtxt
-> TcLclEnv -> SkolemInfoAnon -> [TcId] -> TcM ()
warnRedundantConstraints SolverReportErrCtxt
ctxt' TcLclEnv
tcl_env SkolemInfoAnon
info' [TcId]
dead_givens }
  where
    insoluble :: Bool
insoluble    = ImplicStatus -> Bool
isInsolubleStatus ImplicStatus
status
    (TidyEnv
env1, [TcId]
tvs') = TidyEnv -> [TcId] -> (TidyEnv, [TcId])
tidyVarBndrs (SolverReportErrCtxt -> TidyEnv
cec_tidy SolverReportErrCtxt
ctxt) ([TcId] -> (TidyEnv, [TcId])) -> [TcId] -> (TidyEnv, [TcId])
forall a b. (a -> b) -> a -> b
$
                   [TcId] -> [TcId]
scopedSort [TcId]
tvs
        
        
        
        
    info' :: SkolemInfoAnon
info'   = TidyEnv -> SkolemInfoAnon -> SkolemInfoAnon
tidySkolemInfoAnon TidyEnv
env1 SkolemInfoAnon
info
    implic' :: Implication
implic' = Implication
implic { ic_skols :: [TcId]
ic_skols = [TcId]
tvs'
                     , ic_given :: [TcId]
ic_given = (TcId -> TcId) -> [TcId] -> [TcId]
forall a b. (a -> b) -> [a] -> [b]
map (TidyEnv -> TcId -> TcId
tidyEvVar TidyEnv
env1) [TcId]
given
                     , ic_info :: SkolemInfoAnon
ic_info  = SkolemInfoAnon
info' }
    ctxt1 :: SolverReportErrCtxt
ctxt1 = EvBindsVar -> SolverReportErrCtxt -> SolverReportErrCtxt
maybeSwitchOffDefer EvBindsVar
evb SolverReportErrCtxt
ctxt
    ctxt' :: SolverReportErrCtxt
ctxt' = SolverReportErrCtxt
ctxt1 { cec_tidy :: TidyEnv
cec_tidy     = TidyEnv
env1
                  , cec_encl :: [Implication]
cec_encl     = Implication
implic' Implication -> [Implication] -> [Implication]
forall a. a -> [a] -> [a]
: SolverReportErrCtxt -> [Implication]
cec_encl SolverReportErrCtxt
ctxt
                  , cec_suppress :: Bool
cec_suppress = Bool
insoluble Bool -> Bool -> Bool
|| SolverReportErrCtxt -> Bool
cec_suppress SolverReportErrCtxt
ctxt
                        
                        
                        
                        
                  , cec_binds :: EvBindsVar
cec_binds    = EvBindsVar
evb }
    dead_givens :: [TcId]
dead_givens = case ImplicStatus
status of
                    IC_Solved { ics_dead :: ImplicStatus -> [TcId]
ics_dead = [TcId]
dead } -> [TcId]
dead
                    ImplicStatus
_                             -> []
    bad_telescope :: Bool
bad_telescope = case ImplicStatus
status of
              ImplicStatus
IC_BadTelescope -> Bool
True
              ImplicStatus
_               -> Bool
False
warnRedundantConstraints :: SolverReportErrCtxt -> TcLclEnv -> SkolemInfoAnon -> [EvVar] -> TcM ()
warnRedundantConstraints :: SolverReportErrCtxt
-> TcLclEnv -> SkolemInfoAnon -> [TcId] -> TcM ()
warnRedundantConstraints SolverReportErrCtxt
ctxt TcLclEnv
env SkolemInfoAnon
info [TcId]
ev_vars
 | [TcId] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [TcId]
redundant_evs
 = () -> TcM ()
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return ()
 | SigSkol UserTypeCtxt
user_ctxt Type
_ [(Name, TcId)]
_ <- SkolemInfoAnon
info
 
 
 = TcLclEnv -> TcM () -> TcM ()
forall gbl a.
TcLclEnv -> TcRnIf gbl TcLclEnv a -> TcRnIf gbl TcLclEnv a
restoreLclEnv TcLclEnv
env (TcM () -> TcM ()) -> TcM () -> TcM ()
forall a b. (a -> b) -> a -> b
$
   SrcSpan -> TcM () -> TcM ()
forall a. SrcSpan -> TcRn a -> TcRn a
setSrcSpan (UserTypeCtxt -> SrcSpan
redundantConstraintsSpan UserTypeCtxt
user_ctxt) (TcM () -> TcM ()) -> TcM () -> TcM ()
forall a b. (a -> b) -> a -> b
$
   Bool -> TcM ()
report_redundant_msg Bool
True
                  
 | Bool
otherwise
 
 
 
 = TcLclEnv -> TcM () -> TcM ()
forall gbl a.
TcLclEnv -> TcRnIf gbl TcLclEnv a -> TcRnIf gbl TcLclEnv a
restoreLclEnv TcLclEnv
env
 (TcM () -> TcM ()) -> TcM () -> TcM ()
forall a b. (a -> b) -> a -> b
$ Bool -> TcM ()
report_redundant_msg Bool
False
                 
 where
   report_redundant_msg :: Bool 
                        -> TcRn ()
   report_redundant_msg :: Bool -> TcM ()
report_redundant_msg Bool
show_info
     = do { TcLclEnv
lcl_env <- TcRnIf TcGblEnv TcLclEnv TcLclEnv
forall gbl lcl. TcRnIf gbl lcl lcl
getLclEnv
          ; MsgEnvelope TcRnMessage
msg <-
              TcLclEnv
-> TcRnMessage
-> Maybe SolverReportErrCtxt
-> [SolverReportSupplementary]
-> TcM (MsgEnvelope TcRnMessage)
mkErrorReport
                TcLclEnv
lcl_env
                ([TcId] -> (SkolemInfoAnon, Bool) -> TcRnMessage
TcRnRedundantConstraints [TcId]
redundant_evs (SkolemInfoAnon
info, Bool
show_info))
                (SolverReportErrCtxt -> Maybe SolverReportErrCtxt
forall a. a -> Maybe a
Just SolverReportErrCtxt
ctxt)
                []
          ; MsgEnvelope TcRnMessage -> TcM ()
reportDiagnostic MsgEnvelope TcRnMessage
msg }
   redundant_evs :: [TcId]
redundant_evs =
       (TcId -> Bool) -> [TcId] -> [TcId]
forall a. (a -> Bool) -> [a] -> [a]
filterOut TcId -> Bool
is_type_error ([TcId] -> [TcId]) -> [TcId] -> [TcId]
forall a b. (a -> b) -> a -> b
$
       case SkolemInfoAnon
info of 
         SkolemInfoAnon
InstSkol -> (TcId -> Bool) -> [TcId] -> [TcId]
forall a. (a -> Bool) -> [a] -> [a]
filterOut (Type -> Bool
improving (Type -> Bool) -> (TcId -> Type) -> TcId -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. TcId -> Type
idType) [TcId]
ev_vars
         SkolemInfoAnon
_        -> [TcId]
ev_vars
   
   is_type_error :: TcId -> Bool
is_type_error = Maybe Type -> Bool
forall a. Maybe a -> Bool
isJust (Maybe Type -> Bool) -> (TcId -> Maybe Type) -> TcId -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Type -> Maybe Type
userTypeError_maybe (Type -> Maybe Type) -> (TcId -> Type) -> TcId -> Maybe Type
forall b c a. (b -> c) -> (a -> b) -> a -> c
. TcId -> Type
idType
   improving :: Type -> Bool
improving Type
pred 
     = (Type -> Bool) -> [Type] -> Bool
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
any Type -> Bool
isImprovementPred (Type
pred Type -> [Type] -> [Type]
forall a. a -> [a] -> [a]
: Type -> [Type]
transSuperClasses Type
pred)
reportBadTelescope :: SolverReportErrCtxt -> TcLclEnv -> SkolemInfoAnon -> [TcTyVar] -> TcM ()
reportBadTelescope :: SolverReportErrCtxt
-> TcLclEnv -> SkolemInfoAnon -> [TcId] -> TcM ()
reportBadTelescope SolverReportErrCtxt
ctxt TcLclEnv
env (ForAllSkol TyVarBndrs
telescope) [TcId]
skols
  = do { MsgEnvelope TcRnMessage
msg <- TcLclEnv
-> TcRnMessage
-> Maybe SolverReportErrCtxt
-> [SolverReportSupplementary]
-> TcM (MsgEnvelope TcRnMessage)
mkErrorReport
                  TcLclEnv
env
                  ([SolverReportWithCtxt]
-> DiagnosticReason -> [GhcHint] -> TcRnMessage
TcRnSolverReport [SolverReportWithCtxt
report] DiagnosticReason
ErrorWithoutFlag [GhcHint]
noHints)
                  (SolverReportErrCtxt -> Maybe SolverReportErrCtxt
forall a. a -> Maybe a
Just SolverReportErrCtxt
ctxt)
                  []
       ; MsgEnvelope TcRnMessage -> TcM ()
reportDiagnostic MsgEnvelope TcRnMessage
msg }
  where
    report :: SolverReportWithCtxt
report = SolverReportErrCtxt -> TcSolverReportMsg -> SolverReportWithCtxt
SolverReportWithCtxt SolverReportErrCtxt
ctxt (TcSolverReportMsg -> SolverReportWithCtxt)
-> TcSolverReportMsg -> SolverReportWithCtxt
forall a b. (a -> b) -> a -> b
$ TyVarBndrs -> [TcId] -> TcSolverReportMsg
BadTelescope TyVarBndrs
telescope [TcId]
skols
reportBadTelescope SolverReportErrCtxt
_ TcLclEnv
_ SkolemInfoAnon
skol_info [TcId]
skols
  = String -> SDoc -> TcM ()
forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"reportBadTelescope" (SkolemInfoAnon -> SDoc
forall a. Outputable a => a -> SDoc
ppr SkolemInfoAnon
skol_info SDoc -> SDoc -> SDoc
$$ [TcId] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [TcId]
skols)
ignoreConstraint :: Ct -> Bool
ignoreConstraint :: Ct -> Bool
ignoreConstraint Ct
ct
  | CtOrigin
AssocFamPatOrigin <- Ct -> CtOrigin
ctOrigin Ct
ct
  = Bool
True
  | Bool
otherwise
  = Bool
False
mkErrorItem :: Ct -> TcM (Maybe ErrorItem)
mkErrorItem :: Ct -> TcM (Maybe ErrorItem)
mkErrorItem Ct
ct
  | Ct -> Bool
ignoreConstraint Ct
ct
  = do { String -> SDoc -> TcM ()
traceTc String
"Ignoring constraint:" (Ct -> SDoc
forall a. Outputable a => a -> SDoc
ppr Ct
ct)
       ; Maybe ErrorItem -> TcM (Maybe ErrorItem)
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return Maybe ErrorItem
forall a. Maybe a
Nothing }   
  | Bool
otherwise
  = do { let loc :: CtLoc
loc = Ct -> CtLoc
ctLoc Ct
ct
             flav :: CtFlavour
flav = Ct -> CtFlavour
ctFlavour Ct
ct
       ; (Bool
suppress, Maybe TcEvDest
m_evdest) <- case Ct -> CtEvidence
ctEvidence Ct
ct of
           CtGiven {} -> (Bool, Maybe TcEvDest)
-> IOEnv (Env TcGblEnv TcLclEnv) (Bool, Maybe TcEvDest)
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (Bool
False, Maybe TcEvDest
forall a. Maybe a
Nothing)
           CtWanted { ctev_rewriters :: CtEvidence -> RewriterSet
ctev_rewriters = RewriterSet
rewriters, ctev_dest :: CtEvidence -> TcEvDest
ctev_dest = TcEvDest
dest }
             -> do { Bool
supp <- RewriterSet -> TcRnIf TcGblEnv TcLclEnv Bool
anyUnfilledCoercionHoles RewriterSet
rewriters
                   ; (Bool, Maybe TcEvDest)
-> IOEnv (Env TcGblEnv TcLclEnv) (Bool, Maybe TcEvDest)
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (Bool
supp, TcEvDest -> Maybe TcEvDest
forall a. a -> Maybe a
Just TcEvDest
dest) }
       ; let m_reason :: Maybe CtIrredReason
m_reason = case Ct
ct of CIrredCan { cc_reason :: Ct -> CtIrredReason
cc_reason = CtIrredReason
reason } -> CtIrredReason -> Maybe CtIrredReason
forall a. a -> Maybe a
Just CtIrredReason
reason
                                   Ct
_                                -> Maybe CtIrredReason
forall a. Maybe a
Nothing
       ; Maybe ErrorItem -> TcM (Maybe ErrorItem)
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (Maybe ErrorItem -> TcM (Maybe ErrorItem))
-> Maybe ErrorItem -> TcM (Maybe ErrorItem)
forall a b. (a -> b) -> a -> b
$ ErrorItem -> Maybe ErrorItem
forall a. a -> Maybe a
Just (ErrorItem -> Maybe ErrorItem) -> ErrorItem -> Maybe ErrorItem
forall a b. (a -> b) -> a -> b
$ EI { ei_pred :: Type
ei_pred     = Ct -> Type
ctPred Ct
ct
                            , ei_evdest :: Maybe TcEvDest
ei_evdest   = Maybe TcEvDest
m_evdest
                            , ei_flavour :: CtFlavour
ei_flavour  = CtFlavour
flav
                            , ei_loc :: CtLoc
ei_loc      = CtLoc
loc
                            , ei_m_reason :: Maybe CtIrredReason
ei_m_reason = Maybe CtIrredReason
m_reason
                            , ei_suppress :: Bool
ei_suppress = Bool
suppress }}
reportWanteds :: SolverReportErrCtxt -> TcLevel -> WantedConstraints -> TcM ()
reportWanteds :: SolverReportErrCtxt -> TcLevel -> WantedConstraints -> TcM ()
reportWanteds SolverReportErrCtxt
ctxt TcLevel
tc_lvl wc :: WantedConstraints
wc@(WC { wc_simple :: WantedConstraints -> Cts
wc_simple = Cts
simples, wc_impl :: WantedConstraints -> Bag Implication
wc_impl = Bag Implication
implics
                                 , wc_errors :: WantedConstraints -> Bag DelayedError
wc_errors = Bag DelayedError
errs })
  | WantedConstraints -> Bool
isEmptyWC WantedConstraints
wc = String -> SDoc -> TcM ()
traceTc String
"reportWanteds empty WC" SDoc
empty
  | Bool
otherwise
  = do { [ErrorItem]
tidy_items <- (Ct -> TcM (Maybe ErrorItem))
-> [Ct] -> IOEnv (Env TcGblEnv TcLclEnv) [ErrorItem]
forall (m :: * -> *) a b.
Applicative m =>
(a -> m (Maybe b)) -> [a] -> m [b]
mapMaybeM Ct -> TcM (Maybe ErrorItem)
mkErrorItem [Ct]
tidy_cts
       ; String -> SDoc -> TcM ()
traceTc String
"reportWanteds 1" ([SDoc] -> SDoc
vcat [ String -> SDoc
text String
"Simples =" SDoc -> SDoc -> SDoc
<+> Cts -> SDoc
forall a. Outputable a => a -> SDoc
ppr Cts
simples
                                         , String -> SDoc
text String
"Suppress =" SDoc -> SDoc -> SDoc
<+> Bool -> SDoc
forall a. Outputable a => a -> SDoc
ppr (SolverReportErrCtxt -> Bool
cec_suppress SolverReportErrCtxt
ctxt)
                                         , String -> SDoc
text String
"tidy_cts   =" SDoc -> SDoc -> SDoc
<+> [Ct] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [Ct]
tidy_cts
                                         , String -> SDoc
text String
"tidy_items =" SDoc -> SDoc -> SDoc
<+> [ErrorItem] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ErrorItem]
tidy_items
                                         , String -> SDoc
text String
"tidy_errs =" SDoc -> SDoc -> SDoc
<+> [DelayedError] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [DelayedError]
tidy_errs ])
       
       
       ; TcRnIf TcGblEnv TcLclEnv Bool -> SDoc -> TcM ()
forall (m :: * -> *).
(HasCallStack, Monad m) =>
m Bool -> SDoc -> m ()
assertPprM
           ( do { Bool
errs_already <- TcRnIf TcGblEnv TcLclEnv Bool
-> TcRnIf TcGblEnv TcLclEnv Bool -> TcRnIf TcGblEnv TcLclEnv Bool
forall r. TcRn r -> TcRn r -> TcRn r
ifErrsM (Bool -> TcRnIf TcGblEnv TcLclEnv Bool
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
True) (Bool -> TcRnIf TcGblEnv TcLclEnv Bool
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
False)
                ; Bool -> TcRnIf TcGblEnv TcLclEnv Bool
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (Bool -> TcRnIf TcGblEnv TcLclEnv Bool)
-> Bool -> TcRnIf TcGblEnv TcLclEnv Bool
forall a b. (a -> b) -> a -> b
$
                    Bool
errs_already Bool -> Bool -> Bool
||                  
                    Cts -> Bool
forall a. Bag a -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null Cts
simples Bool -> Bool -> Bool
||                  
                    (Ct -> Bool) -> Cts -> Bool
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
any Ct -> Bool
ignoreConstraint Cts
simples Bool -> Bool -> Bool
||  
                    Bool -> Bool
not ((ErrorItem -> Bool) -> [ErrorItem] -> Bool
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
all ErrorItem -> Bool
ei_suppress [ErrorItem]
tidy_items) 
                } )
           ([SDoc] -> SDoc
vcat [String -> SDoc
text String
"reportWanteds is suppressing all errors"])
         
       ; let ([Hole]
out_of_scope, [Hole]
other_holes, [NotConcreteError]
not_conc_errs) = [DelayedError] -> ([Hole], [Hole], [NotConcreteError])
partition_errors [DelayedError]
tidy_errs
               
             ctxt_for_scope_errs :: SolverReportErrCtxt
ctxt_for_scope_errs = SolverReportErrCtxt
ctxt { cec_suppress :: Bool
cec_suppress = Bool
False }
       ; (()
_, Bool
no_out_of_scope) <- TcM () -> TcRn ((), Bool)
forall a. TcRn a -> TcRn (a, Bool)
askNoErrs (TcM () -> TcRn ((), Bool)) -> TcM () -> TcRn ((), Bool)
forall a b. (a -> b) -> a -> b
$
                                 [ErrorItem] -> SolverReportErrCtxt -> [Hole] -> TcM ()
reportHoles [ErrorItem]
tidy_items SolverReportErrCtxt
ctxt_for_scope_errs [Hole]
out_of_scope
         
         
         
         
         
       ; let ctxt_for_insols :: SolverReportErrCtxt
ctxt_for_insols = SolverReportErrCtxt
ctxt { cec_suppress :: Bool
cec_suppress = Bool -> Bool
not Bool
no_out_of_scope }
       ; [ErrorItem] -> SolverReportErrCtxt -> [Hole] -> TcM ()
reportHoles [ErrorItem]
tidy_items SolverReportErrCtxt
ctxt_for_insols [Hole]
other_holes
          
       ; SolverReportErrCtxt -> [NotConcreteError] -> TcM ()
reportNotConcreteErrs SolverReportErrCtxt
ctxt_for_insols [NotConcreteError]
not_conc_errs
          
       ; let ([ErrorItem]
suppressed_items, [ErrorItem]
items0) = (ErrorItem -> Bool) -> [ErrorItem] -> ([ErrorItem], [ErrorItem])
forall a. (a -> Bool) -> [a] -> ([a], [a])
partition ErrorItem -> Bool
suppress [ErrorItem]
tidy_items
       ; String -> SDoc -> TcM ()
traceTc String
"reportWanteds suppressed:" ([ErrorItem] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ErrorItem]
suppressed_items)
       ; (SolverReportErrCtxt
ctxt1, [ErrorItem]
items1) <- SolverReportErrCtxt
-> [ReporterSpec]
-> [ErrorItem]
-> TcM (SolverReportErrCtxt, [ErrorItem])
tryReporters SolverReportErrCtxt
ctxt_for_insols [ReporterSpec]
report1 [ErrorItem]
items0
         
         
         
       ; let ctxt2 :: SolverReportErrCtxt
ctxt2 = SolverReportErrCtxt
ctxt1 { cec_suppress :: Bool
cec_suppress = SolverReportErrCtxt -> Bool
cec_suppress SolverReportErrCtxt
ctxt Bool -> Bool -> Bool
|| SolverReportErrCtxt -> Bool
cec_suppress SolverReportErrCtxt
ctxt1 }
       ; (SolverReportErrCtxt
ctxt3, [ErrorItem]
leftovers) <- SolverReportErrCtxt
-> [ReporterSpec]
-> [ErrorItem]
-> TcM (SolverReportErrCtxt, [ErrorItem])
tryReporters SolverReportErrCtxt
ctxt2 [ReporterSpec]
report2 [ErrorItem]
items1
       ; Bool -> SDoc -> TcM ()
forall (m :: * -> *).
(HasCallStack, Applicative m) =>
Bool -> SDoc -> m ()
massertPpr ([ErrorItem] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [ErrorItem]
leftovers)
           (String -> SDoc
text String
"The following unsolved Wanted constraints \
                 \have not been reported to the user:"
           SDoc -> SDoc -> SDoc
$$ [ErrorItem] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ErrorItem]
leftovers)
       ; (Implication -> TcM ()) -> Bag Implication -> TcM ()
forall (m :: * -> *) a b. Monad m => (a -> m b) -> Bag a -> m ()
mapBagM_ (SolverReportErrCtxt -> Implication -> TcM ()
reportImplic SolverReportErrCtxt
ctxt2) Bag Implication
implics
            
            
            
            
            
            
            
       ; TcM () -> TcM ()
whenNoErrs (TcM () -> TcM ()) -> TcM () -> TcM ()
forall a b. (a -> b) -> a -> b
$
         do { (SolverReportErrCtxt
_, [ErrorItem]
more_leftovers) <- SolverReportErrCtxt
-> [ReporterSpec]
-> [ErrorItem]
-> TcM (SolverReportErrCtxt, [ErrorItem])
tryReporters SolverReportErrCtxt
ctxt3 [ReporterSpec]
forall {p}. [(String, ErrorItem -> p -> Bool, Bool, Reporter)]
report3 [ErrorItem]
suppressed_items
            ; Bool -> SDoc -> TcM ()
forall (m :: * -> *).
(HasCallStack, Applicative m) =>
Bool -> SDoc -> m ()
massertPpr ([ErrorItem] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [ErrorItem]
more_leftovers) ([ErrorItem] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ErrorItem]
more_leftovers) } }
 where
    env :: TidyEnv
env       = SolverReportErrCtxt -> TidyEnv
cec_tidy SolverReportErrCtxt
ctxt
    tidy_cts :: [Ct]
tidy_cts  = Cts -> [Ct]
forall a. Bag a -> [a]
bagToList ((Ct -> Ct) -> Cts -> Cts
forall a b. (a -> b) -> Bag a -> Bag b
mapBag (TidyEnv -> Ct -> Ct
tidyCt TidyEnv
env)   Cts
simples)
    tidy_errs :: [DelayedError]
tidy_errs = Bag DelayedError -> [DelayedError]
forall a. Bag a -> [a]
bagToList ((DelayedError -> DelayedError)
-> Bag DelayedError -> Bag DelayedError
forall a b. (a -> b) -> Bag a -> Bag b
mapBag (TidyEnv -> DelayedError -> DelayedError
tidyDelayedError TidyEnv
env) Bag DelayedError
errs)
    partition_errors :: [DelayedError] -> ([Hole], [Hole], [NotConcreteError])
    partition_errors :: [DelayedError] -> ([Hole], [Hole], [NotConcreteError])
partition_errors = [Hole]
-> [Hole]
-> [NotConcreteError]
-> [DelayedError]
-> ([Hole], [Hole], [NotConcreteError])
go [] [] []
      where
        go :: [Hole]
-> [Hole]
-> [NotConcreteError]
-> [DelayedError]
-> ([Hole], [Hole], [NotConcreteError])
go [Hole]
out_of_scope [Hole]
other_holes [NotConcreteError]
syn_eqs []
          = ([Hole]
out_of_scope, [Hole]
other_holes, [NotConcreteError]
syn_eqs)
        go [Hole]
es1 [Hole]
es2 [NotConcreteError]
es3 (DelayedError
err:[DelayedError]
errs)
          | ([Hole]
es1, [Hole]
es2, [NotConcreteError]
es3) <- [Hole]
-> [Hole]
-> [NotConcreteError]
-> [DelayedError]
-> ([Hole], [Hole], [NotConcreteError])
go [Hole]
es1 [Hole]
es2 [NotConcreteError]
es3 [DelayedError]
errs
          = case DelayedError
err of
              DE_Hole Hole
hole
                | Hole -> Bool
isOutOfScopeHole Hole
hole
                -> (Hole
hole Hole -> [Hole] -> [Hole]
forall a. a -> [a] -> [a]
: [Hole]
es1, [Hole]
es2, [NotConcreteError]
es3)
                | Bool
otherwise
                -> ([Hole]
es1, Hole
hole Hole -> [Hole] -> [Hole]
forall a. a -> [a] -> [a]
: [Hole]
es2, [NotConcreteError]
es3)
              DE_NotConcrete NotConcreteError
err
                -> ([Hole]
es1, [Hole]
es2, NotConcreteError
err NotConcreteError -> [NotConcreteError] -> [NotConcreteError]
forall a. a -> [a] -> [a]
: [NotConcreteError]
es3)
      
    suppress :: ErrorItem -> Bool
    suppress :: ErrorItem -> Bool
suppress ErrorItem
item
      | CtFlavour
Wanted <- ErrorItem -> CtFlavour
ei_flavour ErrorItem
item
      = ErrorItem -> Bool
is_ww_fundep_item ErrorItem
item
      | Bool
otherwise
      = Bool
False
    
    
    
    
    
    
    report1 :: [ReporterSpec]
report1 = [ (String
"custom_error", ErrorItem -> Pred -> Bool
forall {p}. ErrorItem -> p -> Bool
is_user_type_error, Bool
True,  Reporter
mkUserTypeErrorReporter)
              , ReporterSpec
given_eq_spec
              , (String
"insoluble2",      ErrorItem -> Pred -> Bool
forall {p}. p -> Pred -> Bool
utterly_wrong,  Bool
True, (SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport)
-> Reporter
mkGroupReporter SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkEqErr)
              , (String
"skolem eq1",      ErrorItem -> Pred -> Bool
very_wrong,     Bool
True, Reporter
mkSkolReporter)
              , (String
"FixedRuntimeRep", ErrorItem -> Pred -> Bool
is_FRR,         Bool
True, (SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport)
-> Reporter
mkGroupReporter (() :: Constraint) =>
SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkFRRErr)
              , (String
"skolem eq2",      ErrorItem -> Pred -> Bool
skolem_eq,      Bool
True, Reporter
mkSkolReporter)
              , (String
"non-tv eq",       ErrorItem -> Pred -> Bool
forall {p}. p -> Pred -> Bool
non_tv_eq,      Bool
True, Reporter
mkSkolReporter)
                  
                  
                  
                  
                  
              , (String
"Homo eqs",      ErrorItem -> Pred -> Bool
forall {p}. p -> Pred -> Bool
is_homo_equality,  Bool
True,  (SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport)
-> Reporter
mkGroupReporter SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkEqErr)
              , (String
"Other eqs",     ErrorItem -> Pred -> Bool
is_equality,       Bool
True,  (SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport)
-> Reporter
mkGroupReporter SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkEqErr)
              ]
    
    report2 :: [ReporterSpec]
report2 = [ (String
"Implicit params", ErrorItem -> Pred -> Bool
is_ip,           Bool
False, (SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport)
-> Reporter
mkGroupReporter SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkIPErr)
              , (String
"Irreds",          ErrorItem -> Pred -> Bool
is_irred,        Bool
False, (SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport)
-> Reporter
mkGroupReporter SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkIrredErr)
              , (String
"Dicts",           ErrorItem -> Pred -> Bool
is_dict,         Bool
False, (SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport)
-> Reporter
mkGroupReporter (() :: Constraint) =>
SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkDictErr) ]
    
    
    report3 :: [(String, ErrorItem -> p -> Bool, Bool, Reporter)]
report3 = [ (String
"wanted/wanted fundeps", ErrorItem -> p -> Bool
forall {p}. ErrorItem -> p -> Bool
is_ww_fundep, Bool
True, (SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport)
-> Reporter
mkGroupReporter SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkEqErr)
              ]
    
    is_dict, is_equality, is_ip, is_FRR, is_irred :: ErrorItem -> Pred -> Bool
    is_given_eq :: ErrorItem -> Pred -> Bool
is_given_eq ErrorItem
item Pred
pred
       | CtFlavour
Given <- ErrorItem -> CtFlavour
ei_flavour ErrorItem
item
       , EqPred {} <- Pred
pred = Bool
True
       | Bool
otherwise         = Bool
False
       
    
    utterly_wrong :: p -> Pred -> Bool
utterly_wrong p
_ (EqPred EqRel
NomEq Type
ty1 Type
ty2) = Type -> Bool
isRigidTy Type
ty1 Bool -> Bool -> Bool
&& Type -> Bool
isRigidTy Type
ty2
    utterly_wrong p
_ Pred
_                      = Bool
False
    
    very_wrong :: ErrorItem -> Pred -> Bool
very_wrong ErrorItem
_ (EqPred EqRel
NomEq Type
ty1 Type
ty2) = TcLevel -> Type -> Bool
isSkolemTy TcLevel
tc_lvl Type
ty1 Bool -> Bool -> Bool
&& Type -> Bool
isRigidTy Type
ty2
    very_wrong ErrorItem
_ Pred
_                      = Bool
False
    
    is_FRR :: ErrorItem -> Pred -> Bool
is_FRR ErrorItem
item Pred
_ = Maybe FixedRuntimeRepErrorInfo -> Bool
forall a. Maybe a -> Bool
isJust (Maybe FixedRuntimeRepErrorInfo -> Bool)
-> Maybe FixedRuntimeRepErrorInfo -> Bool
forall a b. (a -> b) -> a -> b
$ (() :: Constraint) => ErrorItem -> Maybe FixedRuntimeRepErrorInfo
ErrorItem -> Maybe FixedRuntimeRepErrorInfo
fixedRuntimeRepOrigin_maybe ErrorItem
item
    
    skolem_eq :: ErrorItem -> Pred -> Bool
skolem_eq ErrorItem
_ (EqPred EqRel
NomEq Type
ty1 Type
_) = TcLevel -> Type -> Bool
isSkolemTy TcLevel
tc_lvl Type
ty1
    skolem_eq ErrorItem
_ Pred
_                    = Bool
False
    
    non_tv_eq :: p -> Pred -> Bool
non_tv_eq p
_ (EqPred EqRel
NomEq Type
ty1 Type
_) = Bool -> Bool
not (Type -> Bool
isTyVarTy Type
ty1)
    non_tv_eq p
_ Pred
_                    = Bool
False
    is_user_type_error :: ErrorItem -> p -> Bool
is_user_type_error ErrorItem
item p
_ = Type -> Bool
isUserTypeError (ErrorItem -> Type
errorItemPred ErrorItem
item)
    is_homo_equality :: p -> Pred -> Bool
is_homo_equality p
_ (EqPred EqRel
_ Type
ty1 Type
ty2)
      = (() :: Constraint) => Type -> Type
Type -> Type
tcTypeKind Type
ty1 (() :: Constraint) => Type -> Type -> Bool
Type -> Type -> Bool
`tcEqType` (() :: Constraint) => Type -> Type
Type -> Type
tcTypeKind Type
ty2
    is_homo_equality p
_ Pred
_
      = Bool
False
    is_equality :: ErrorItem -> Pred -> Bool
is_equality ErrorItem
_(EqPred {}) = Bool
True
    is_equality ErrorItem
_ Pred
_          = Bool
False
    is_dict :: ErrorItem -> Pred -> Bool
is_dict ErrorItem
_ (ClassPred {}) = Bool
True
    is_dict ErrorItem
_ Pred
_              = Bool
False
    is_ip :: ErrorItem -> Pred -> Bool
is_ip ErrorItem
_ (ClassPred Class
cls [Type]
_) = Class -> Bool
isIPClass Class
cls
    is_ip ErrorItem
_ Pred
_                 = Bool
False
    is_irred :: ErrorItem -> Pred -> Bool
is_irred ErrorItem
_ (IrredPred {}) = Bool
True
    is_irred ErrorItem
_ Pred
_              = Bool
False
     
    is_ww_fundep :: ErrorItem -> p -> Bool
is_ww_fundep ErrorItem
item p
_ = ErrorItem -> Bool
is_ww_fundep_item ErrorItem
item
    is_ww_fundep_item :: ErrorItem -> Bool
is_ww_fundep_item = CtOrigin -> Bool
isWantedWantedFunDepOrigin (CtOrigin -> Bool) -> (ErrorItem -> CtOrigin) -> ErrorItem -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ErrorItem -> CtOrigin
errorItemOrigin
    given_eq_spec :: ReporterSpec
given_eq_spec  
      | Bool
has_gadt_match_here
      = (String
"insoluble1a", ErrorItem -> Pred -> Bool
is_given_eq, Bool
True,  Reporter
mkGivenErrorReporter)
      | Bool
otherwise
      = (String
"insoluble1b", ErrorItem -> Pred -> Bool
is_given_eq, Bool
False, Reporter
ignoreErrorReporter)
          
          
          
          
          
    
    has_gadt_match_here :: Bool
has_gadt_match_here = [Implication] -> Bool
has_gadt_match (SolverReportErrCtxt -> [Implication]
cec_encl SolverReportErrCtxt
ctxt)
    has_gadt_match :: [Implication] -> Bool
has_gadt_match [] = Bool
False
    has_gadt_match (Implication
implic : [Implication]
implics)
      | PatSkol {} <- Implication -> SkolemInfoAnon
ic_info Implication
implic
      , Implication -> HasGivenEqs
ic_given_eqs Implication
implic HasGivenEqs -> HasGivenEqs -> Bool
forall a. Eq a => a -> a -> Bool
/= HasGivenEqs
NoGivenEqs
      , Implication -> Bool
ic_warn_inaccessible Implication
implic
          
          
      = Bool
True
      | Bool
otherwise
      = [Implication] -> Bool
has_gadt_match [Implication]
implics
isSkolemTy :: TcLevel -> Type -> Bool
isSkolemTy :: TcLevel -> Type -> Bool
isSkolemTy TcLevel
tc_lvl Type
ty
  | Just TcId
tv <- Type -> Maybe TcId
getTyVar_maybe Type
ty
  =  TcId -> Bool
isSkolemTyVar TcId
tv
  Bool -> Bool -> Bool
|| (TcId -> Bool
isTyVarTyVar TcId
tv Bool -> Bool -> Bool
&& TcLevel -> TcId -> Bool
isTouchableMetaTyVar TcLevel
tc_lvl TcId
tv)
     
     
  | Bool
otherwise
  = Bool
False
isTyFun_maybe :: Type -> Maybe TyCon
isTyFun_maybe :: Type -> Maybe TyCon
isTyFun_maybe Type
ty = case HasCallStack => Type -> Maybe (TyCon, [Type])
Type -> Maybe (TyCon, [Type])
tcSplitTyConApp_maybe Type
ty of
                      Just (TyCon
tc,[Type]
_) | TyCon -> Bool
isTypeFamilyTyCon TyCon
tc -> TyCon -> Maybe TyCon
forall a. a -> Maybe a
Just TyCon
tc
                      Maybe (TyCon, [Type])
_ -> Maybe TyCon
forall a. Maybe a
Nothing
type Reporter
  = SolverReportErrCtxt -> [ErrorItem] -> TcM ()
type ReporterSpec
  = ( String                      
    , ErrorItem -> Pred -> Bool  
    , Bool                        
    , Reporter)                   
mkSkolReporter :: Reporter
mkSkolReporter :: Reporter
mkSkolReporter SolverReportErrCtxt
ctxt [ErrorItem]
items
  = ([ErrorItem] -> TcM ()) -> [[ErrorItem]] -> TcM ()
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
(a -> m b) -> t a -> m ()
mapM_ ((SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport)
-> Reporter
reportGroup SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkEqErr SolverReportErrCtxt
ctxt) ([ErrorItem] -> [[ErrorItem]]
group [ErrorItem]
items)
  where
     group :: [ErrorItem] -> [[ErrorItem]]
group [] = []
     group (ErrorItem
item:[ErrorItem]
items) = (ErrorItem
item ErrorItem -> [ErrorItem] -> [ErrorItem]
forall a. a -> [a] -> [a]
: [ErrorItem]
yeses) [ErrorItem] -> [[ErrorItem]] -> [[ErrorItem]]
forall a. a -> [a] -> [a]
: [ErrorItem] -> [[ErrorItem]]
group [ErrorItem]
noes
        where
          ([ErrorItem]
yeses, [ErrorItem]
noes) = (ErrorItem -> Bool) -> [ErrorItem] -> ([ErrorItem], [ErrorItem])
forall a. (a -> Bool) -> [a] -> ([a], [a])
partition (ErrorItem -> ErrorItem -> Bool
group_with ErrorItem
item) [ErrorItem]
items
     group_with :: ErrorItem -> ErrorItem -> Bool
group_with ErrorItem
item1 ErrorItem
item2
       | Ordering
EQ <- ErrorItem -> ErrorItem -> Ordering
cmp_loc ErrorItem
item1 ErrorItem
item2 = Bool
True
       | ErrorItem -> ErrorItem -> Bool
eq_lhs_type   ErrorItem
item1 ErrorItem
item2 = Bool
True
       | Bool
otherwise                 = Bool
False
reportHoles :: [ErrorItem]  
            -> SolverReportErrCtxt -> [Hole] -> TcM ()
reportHoles :: [ErrorItem] -> SolverReportErrCtxt -> [Hole] -> TcM ()
reportHoles [ErrorItem]
tidy_items SolverReportErrCtxt
ctxt [Hole]
holes
  = do
      DiagOpts
diag_opts <- DynFlags -> DiagOpts
initDiagOpts (DynFlags -> DiagOpts)
-> IOEnv (Env TcGblEnv TcLclEnv) DynFlags
-> IOEnv (Env TcGblEnv TcLclEnv) DiagOpts
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> IOEnv (Env TcGblEnv TcLclEnv) DynFlags
forall (m :: * -> *). HasDynFlags m => m DynFlags
getDynFlags
      let severity :: Severity
severity = DiagOpts -> DiagnosticReason -> Severity
diagReasonSeverity DiagOpts
diag_opts (SolverReportErrCtxt -> DiagnosticReason
cec_type_holes SolverReportErrCtxt
ctxt)
          holes' :: [Hole]
holes'   = (Hole -> Bool) -> [Hole] -> [Hole]
forall a. (a -> Bool) -> [a] -> [a]
filter (Severity -> Hole -> Bool
keepThisHole Severity
severity) [Hole]
holes
      
      
      (TidyEnv
tidy_env', NameEnv Type
lcl_name_cache) <- TidyEnv -> [TcLclEnv] -> TcM (TidyEnv, NameEnv Type)
zonkTidyTcLclEnvs (SolverReportErrCtxt -> TidyEnv
cec_tidy SolverReportErrCtxt
ctxt) ((Hole -> TcLclEnv) -> [Hole] -> [TcLclEnv]
forall a b. (a -> b) -> [a] -> [b]
map (CtLoc -> TcLclEnv
ctl_env (CtLoc -> TcLclEnv) -> (Hole -> CtLoc) -> Hole -> TcLclEnv
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Hole -> CtLoc
hole_loc) [Hole]
holes')
      let ctxt' :: SolverReportErrCtxt
ctxt' = SolverReportErrCtxt
ctxt { cec_tidy :: TidyEnv
cec_tidy = TidyEnv
tidy_env' }
      [Hole] -> (Hole -> TcM ()) -> TcM ()
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ [Hole]
holes' ((Hole -> TcM ()) -> TcM ()) -> (Hole -> TcM ()) -> TcM ()
forall a b. (a -> b) -> a -> b
$ \Hole
hole -> do { MsgEnvelope TcRnMessage
msg <- NameEnv Type
-> [ErrorItem]
-> SolverReportErrCtxt
-> Hole
-> TcM (MsgEnvelope TcRnMessage)
mkHoleError NameEnv Type
lcl_name_cache [ErrorItem]
tidy_items SolverReportErrCtxt
ctxt' Hole
hole
                                 ; MsgEnvelope TcRnMessage -> TcM ()
reportDiagnostic MsgEnvelope TcRnMessage
msg }
keepThisHole :: Severity -> Hole -> Bool
keepThisHole :: Severity -> Hole -> Bool
keepThisHole Severity
sev Hole
hole
  = case Hole -> HoleSort
hole_sort Hole
hole of
       ExprHole {}    -> Bool
True
       HoleSort
TypeHole       -> Bool
keep_type_hole
       HoleSort
ConstraintHole -> Bool
keep_type_hole
  where
    keep_type_hole :: Bool
keep_type_hole = case Severity
sev of
                         Severity
SevIgnore -> Bool
False
                         Severity
_         -> Bool
True
zonkTidyTcLclEnvs :: TidyEnv -> [TcLclEnv] -> TcM (TidyEnv, NameEnv Type)
zonkTidyTcLclEnvs :: TidyEnv -> [TcLclEnv] -> TcM (TidyEnv, NameEnv Type)
zonkTidyTcLclEnvs TidyEnv
tidy_env [TcLclEnv]
lcls = ((TidyEnv, NameEnv Type)
 -> TcBinder -> TcM (TidyEnv, NameEnv Type))
-> (TidyEnv, NameEnv Type)
-> [TcBinder]
-> TcM (TidyEnv, NameEnv Type)
forall (t :: * -> *) (m :: * -> *) b a.
(Foldable t, Monad m) =>
(b -> a -> m b) -> b -> t a -> m b
foldM (TidyEnv, NameEnv Type) -> TcBinder -> TcM (TidyEnv, NameEnv Type)
go (TidyEnv
tidy_env, NameEnv Type
forall a. NameEnv a
emptyNameEnv) ((TcLclEnv -> [TcBinder]) -> [TcLclEnv] -> [TcBinder]
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap TcLclEnv -> [TcBinder]
tcl_bndrs [TcLclEnv]
lcls)
  where
    go :: (TidyEnv, NameEnv Type) -> TcBinder -> TcM (TidyEnv, NameEnv Type)
go (TidyEnv, NameEnv Type)
envs TcBinder
tc_bndr = case TcBinder
tc_bndr of
          TcTvBndr {} -> (TidyEnv, NameEnv Type) -> TcM (TidyEnv, NameEnv Type)
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (TidyEnv, NameEnv Type)
envs
          TcIdBndr TcId
id TopLevelFlag
_top_lvl -> Name
-> Type -> (TidyEnv, NameEnv Type) -> TcM (TidyEnv, NameEnv Type)
go_one (TcId -> Name
idName TcId
id) (TcId -> Type
idType TcId
id) (TidyEnv, NameEnv Type)
envs
          TcIdBndr_ExpType Name
name ExpType
et TopLevelFlag
_top_lvl ->
            do { Maybe Type
mb_ty <- ExpType -> TcM (Maybe Type)
readExpType_maybe ExpType
et
                   
                   
                   
                   
                   
               ; case Maybe Type
mb_ty of
                   Just Type
ty -> Name
-> Type -> (TidyEnv, NameEnv Type) -> TcM (TidyEnv, NameEnv Type)
go_one Name
name Type
ty (TidyEnv, NameEnv Type)
envs
                   Maybe Type
Nothing -> (TidyEnv, NameEnv Type) -> TcM (TidyEnv, NameEnv Type)
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (TidyEnv, NameEnv Type)
envs
               }
    go_one :: Name
-> Type -> (TidyEnv, NameEnv Type) -> TcM (TidyEnv, NameEnv Type)
go_one Name
name Type
ty (TidyEnv
tidy_env, NameEnv Type
name_env) = do
            if Name
name Name -> NameEnv Type -> Bool
forall a. Name -> NameEnv a -> Bool
`elemNameEnv` NameEnv Type
name_env
              then (TidyEnv, NameEnv Type) -> TcM (TidyEnv, NameEnv Type)
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (TidyEnv
tidy_env, NameEnv Type
name_env)
              else do
                (TidyEnv
tidy_env', Type
tidy_ty) <- TidyEnv -> Type -> TcM (TidyEnv, Type)
zonkTidyTcType TidyEnv
tidy_env Type
ty
                (TidyEnv, NameEnv Type) -> TcM (TidyEnv, NameEnv Type)
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (TidyEnv
tidy_env',  NameEnv Type -> Name -> Type -> NameEnv Type
forall a. NameEnv a -> Name -> a -> NameEnv a
extendNameEnv NameEnv Type
name_env Name
name Type
tidy_ty)
reportNotConcreteErrs :: SolverReportErrCtxt -> [NotConcreteError] -> TcM ()
reportNotConcreteErrs :: SolverReportErrCtxt -> [NotConcreteError] -> TcM ()
reportNotConcreteErrs SolverReportErrCtxt
_ [] = () -> TcM ()
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return ()
reportNotConcreteErrs SolverReportErrCtxt
ctxt errs :: [NotConcreteError]
errs@(NotConcreteError
err0:[NotConcreteError]
_)
  = do { MsgEnvelope TcRnMessage
msg <- TcLclEnv
-> TcRnMessage
-> Maybe SolverReportErrCtxt
-> [SolverReportSupplementary]
-> TcM (MsgEnvelope TcRnMessage)
mkErrorReport (CtLoc -> TcLclEnv
ctLocEnv (NotConcreteError -> CtLoc
nce_loc NotConcreteError
err0)) TcRnMessage
diag (SolverReportErrCtxt -> Maybe SolverReportErrCtxt
forall a. a -> Maybe a
Just SolverReportErrCtxt
ctxt) []
       ; MsgEnvelope TcRnMessage -> TcM ()
reportDiagnostic MsgEnvelope TcRnMessage
msg }
  where
    frr_origins :: [FixedRuntimeRepErrorInfo]
frr_origins = [NotConcreteError] -> [FixedRuntimeRepErrorInfo]
acc_errors [NotConcreteError]
errs
    diag :: TcRnMessage
diag = [SolverReportWithCtxt]
-> DiagnosticReason -> [GhcHint] -> TcRnMessage
TcRnSolverReport
             [SolverReportErrCtxt -> TcSolverReportMsg -> SolverReportWithCtxt
SolverReportWithCtxt SolverReportErrCtxt
ctxt ([FixedRuntimeRepErrorInfo] -> TcSolverReportMsg
FixedRuntimeRepError [FixedRuntimeRepErrorInfo]
frr_origins)]
             DiagnosticReason
ErrorWithoutFlag [GhcHint]
noHints
    
    
    acc_errors :: [NotConcreteError] -> [FixedRuntimeRepErrorInfo]
acc_errors = [FixedRuntimeRepErrorInfo]
-> [NotConcreteError] -> [FixedRuntimeRepErrorInfo]
go []
      where
        go :: [FixedRuntimeRepErrorInfo]
-> [NotConcreteError] -> [FixedRuntimeRepErrorInfo]
go [FixedRuntimeRepErrorInfo]
frr_errs [] = [FixedRuntimeRepErrorInfo]
frr_errs
        go [FixedRuntimeRepErrorInfo]
frr_errs (NotConcreteError
err:[NotConcreteError]
errs)
          | [FixedRuntimeRepErrorInfo]
frr_errs <- [FixedRuntimeRepErrorInfo]
-> [NotConcreteError] -> [FixedRuntimeRepErrorInfo]
go [FixedRuntimeRepErrorInfo]
frr_errs [NotConcreteError]
errs
          = case NotConcreteError
err of
              NCE_FRR
                { nce_frr_origin :: NotConcreteError -> FixedRuntimeRepOrigin
nce_frr_origin = FixedRuntimeRepOrigin
frr_orig
                , nce_reasons :: NotConcreteError -> NonEmpty NotConcreteReason
nce_reasons = NonEmpty NotConcreteReason
_not_conc } ->
                FRR_Info
                  { frr_info_origin :: FixedRuntimeRepOrigin
frr_info_origin       = FixedRuntimeRepOrigin
frr_orig
                  , frr_info_not_concrete :: Maybe (TcId, Type)
frr_info_not_concrete = Maybe (TcId, Type)
forall a. Maybe a
Nothing }
                FixedRuntimeRepErrorInfo
-> [FixedRuntimeRepErrorInfo] -> [FixedRuntimeRepErrorInfo]
forall a. a -> [a] -> [a]
: [FixedRuntimeRepErrorInfo]
frr_errs
mkUserTypeErrorReporter :: Reporter
mkUserTypeErrorReporter :: Reporter
mkUserTypeErrorReporter SolverReportErrCtxt
ctxt
  = (ErrorItem -> TcM ()) -> [ErrorItem] -> TcM ()
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
(a -> m b) -> t a -> m ()
mapM_ ((ErrorItem -> TcM ()) -> [ErrorItem] -> TcM ())
-> (ErrorItem -> TcM ()) -> [ErrorItem] -> TcM ()
forall a b. (a -> b) -> a -> b
$ \ErrorItem
item -> do { let err :: SolverReport
err = SolverReportErrCtxt -> TcSolverReportMsg -> SolverReport
important SolverReportErrCtxt
ctxt (TcSolverReportMsg -> SolverReport)
-> TcSolverReportMsg -> SolverReport
forall a b. (a -> b) -> a -> b
$ ErrorItem -> TcSolverReportMsg
mkUserTypeError ErrorItem
item
                        ; SolverReportErrCtxt -> [ErrorItem] -> SolverReport -> TcM ()
maybeReportError SolverReportErrCtxt
ctxt [ErrorItem
item] SolverReport
err
                        ; SolverReportErrCtxt -> SolverReport -> ErrorItem -> TcM ()
addDeferredBinding SolverReportErrCtxt
ctxt SolverReport
err ErrorItem
item }
mkUserTypeError :: ErrorItem -> TcSolverReportMsg
mkUserTypeError :: ErrorItem -> TcSolverReportMsg
mkUserTypeError ErrorItem
item =
  case Type -> Maybe Type
getUserTypeErrorMsg (ErrorItem -> Type
errorItemPred ErrorItem
item) of
    Just Type
msg -> Type -> TcSolverReportMsg
UserTypeError Type
msg
    Maybe Type
Nothing  -> String -> SDoc -> TcSolverReportMsg
forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"mkUserTypeError" (ErrorItem -> SDoc
forall a. Outputable a => a -> SDoc
ppr ErrorItem
item)
mkGivenErrorReporter :: Reporter
mkGivenErrorReporter :: Reporter
mkGivenErrorReporter SolverReportErrCtxt
ctxt [ErrorItem]
items
  = do { (SolverReportErrCtxt
ctxt, RelevantBindings
relevant_binds, ErrorItem
item) <- Bool
-> SolverReportErrCtxt
-> ErrorItem
-> TcM (SolverReportErrCtxt, RelevantBindings, ErrorItem)
relevantBindings Bool
True SolverReportErrCtxt
ctxt ErrorItem
item
       ; let (Implication
implic:[Implication]
_) = SolverReportErrCtxt -> [Implication]
cec_encl SolverReportErrCtxt
ctxt
                 
             loc' :: CtLoc
loc'  = CtLoc -> TcLclEnv -> CtLoc
setCtLocEnv (ErrorItem -> CtLoc
ei_loc ErrorItem
item) (Implication -> TcLclEnv
ic_env Implication
implic)
             item' :: ErrorItem
item' = ErrorItem
item { ei_loc :: CtLoc
ei_loc = CtLoc
loc' }
                   
                   
                   
       ; (AccReportMsgs
eq_err_msgs, [GhcHint]
_hints) <- SolverReportErrCtxt
-> ErrorItem -> Type -> Type -> TcM (AccReportMsgs, [GhcHint])
mkEqErr_help SolverReportErrCtxt
ctxt ErrorItem
item' Type
ty1 Type
ty2
       
       ; let supplementary :: [SolverReportSupplementary]
supplementary = [ RelevantBindings -> SolverReportSupplementary
SupplementaryBindings RelevantBindings
relevant_binds ]
             msg :: TcRnMessage
msg = Implication -> NonEmpty SolverReportWithCtxt -> TcRnMessage
TcRnInaccessibleCode Implication
implic (NonEmpty SolverReportWithCtxt -> NonEmpty SolverReportWithCtxt
forall a. NonEmpty a -> NonEmpty a
NE.reverse (NonEmpty SolverReportWithCtxt -> NonEmpty SolverReportWithCtxt)
-> (AccReportMsgs -> NonEmpty SolverReportWithCtxt)
-> AccReportMsgs
-> NonEmpty SolverReportWithCtxt
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (TcSolverReportMsg -> SolverReportWithCtxt)
-> AccReportMsgs -> NonEmpty SolverReportWithCtxt
forall a b. (a -> b) -> NonEmpty a -> NonEmpty b
NE.map (SolverReportErrCtxt -> TcSolverReportMsg -> SolverReportWithCtxt
SolverReportWithCtxt SolverReportErrCtxt
ctxt) (AccReportMsgs -> NonEmpty SolverReportWithCtxt)
-> AccReportMsgs -> NonEmpty SolverReportWithCtxt
forall a b. (a -> b) -> a -> b
$ AccReportMsgs
eq_err_msgs)
       ; MsgEnvelope TcRnMessage
msg <- TcLclEnv
-> TcRnMessage
-> Maybe SolverReportErrCtxt
-> [SolverReportSupplementary]
-> TcM (MsgEnvelope TcRnMessage)
mkErrorReport (CtLoc -> TcLclEnv
ctLocEnv CtLoc
loc') TcRnMessage
msg (SolverReportErrCtxt -> Maybe SolverReportErrCtxt
forall a. a -> Maybe a
Just SolverReportErrCtxt
ctxt) [SolverReportSupplementary]
supplementary
       ; MsgEnvelope TcRnMessage -> TcM ()
reportDiagnostic MsgEnvelope TcRnMessage
msg }
  where
    (ErrorItem
item : [ErrorItem]
_ )  = [ErrorItem]
items    
    (Type
ty1, Type
ty2)   = Type -> (Type, Type)
getEqPredTys (ErrorItem -> Type
errorItemPred ErrorItem
item)
ignoreErrorReporter :: Reporter
ignoreErrorReporter :: Reporter
ignoreErrorReporter SolverReportErrCtxt
ctxt [ErrorItem]
items
  = do { String -> SDoc -> TcM ()
traceTc String
"mkGivenErrorReporter no" ([ErrorItem] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ErrorItem]
items SDoc -> SDoc -> SDoc
$$ [Implication] -> SDoc
forall a. Outputable a => a -> SDoc
ppr (SolverReportErrCtxt -> [Implication]
cec_encl SolverReportErrCtxt
ctxt))
       ; () -> TcM ()
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return () }
mkGroupReporter :: (SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport)
                             
                -> Reporter  
mkGroupReporter :: (SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport)
-> Reporter
mkGroupReporter SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mk_err SolverReportErrCtxt
ctxt [ErrorItem]
items
  = (NonEmpty ErrorItem -> TcM ()) -> [NonEmpty ErrorItem] -> TcM ()
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
(a -> m b) -> t a -> m ()
mapM_ ((SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport)
-> Reporter
reportGroup SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mk_err SolverReportErrCtxt
ctxt ([ErrorItem] -> TcM ())
-> (NonEmpty ErrorItem -> [ErrorItem])
-> NonEmpty ErrorItem
-> TcM ()
forall b c a. (b -> c) -> (a -> b) -> a -> c
. NonEmpty ErrorItem -> [ErrorItem]
forall a. NonEmpty a -> [a]
forall (t :: * -> *) a. Foldable t => t a -> [a]
toList) ((ErrorItem -> ErrorItem -> Ordering)
-> [ErrorItem] -> [NonEmpty ErrorItem]
forall a. (a -> a -> Ordering) -> [a] -> [NonEmpty a]
equivClasses ErrorItem -> ErrorItem -> Ordering
cmp_loc [ErrorItem]
items)
eq_lhs_type :: ErrorItem -> ErrorItem -> Bool
eq_lhs_type :: ErrorItem -> ErrorItem -> Bool
eq_lhs_type ErrorItem
item1 ErrorItem
item2
  = case (Type -> Pred
classifyPredType (ErrorItem -> Type
errorItemPred ErrorItem
item1), Type -> Pred
classifyPredType (ErrorItem -> Type
errorItemPred ErrorItem
item2)) of
       (EqPred EqRel
eq_rel1 Type
ty1 Type
_, EqPred EqRel
eq_rel2 Type
ty2 Type
_) ->
         (EqRel
eq_rel1 EqRel -> EqRel -> Bool
forall a. Eq a => a -> a -> Bool
== EqRel
eq_rel2) Bool -> Bool -> Bool
&& (Type
ty1 Type -> Type -> Bool
`eqType` Type
ty2)
       (Pred, Pred)
_ -> String -> SDoc -> Bool
forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"mkSkolReporter" (ErrorItem -> SDoc
forall a. Outputable a => a -> SDoc
ppr ErrorItem
item1 SDoc -> SDoc -> SDoc
$$ ErrorItem -> SDoc
forall a. Outputable a => a -> SDoc
ppr ErrorItem
item2)
cmp_loc :: ErrorItem -> ErrorItem -> Ordering
cmp_loc :: ErrorItem -> ErrorItem -> Ordering
cmp_loc ErrorItem
item1 ErrorItem
item2 = ErrorItem -> RealSrcLoc
get ErrorItem
item1 RealSrcLoc -> RealSrcLoc -> Ordering
forall a. Ord a => a -> a -> Ordering
`compare` ErrorItem -> RealSrcLoc
get ErrorItem
item2
  where
    get :: ErrorItem -> RealSrcLoc
get ErrorItem
ei = RealSrcSpan -> RealSrcLoc
realSrcSpanStart (CtLoc -> RealSrcSpan
ctLocSpan (ErrorItem -> CtLoc
errorItemCtLoc ErrorItem
ei))
             
             
reportGroup :: (SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport) -> Reporter
reportGroup :: (SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport)
-> Reporter
reportGroup SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mk_err SolverReportErrCtxt
ctxt [ErrorItem]
items
  = do { SolverReport
err <- SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mk_err SolverReportErrCtxt
ctxt [ErrorItem]
items
       ; String -> SDoc -> TcM ()
traceTc String
"About to maybeReportErr" (SDoc -> TcM ()) -> SDoc -> TcM ()
forall a b. (a -> b) -> a -> b
$
         [SDoc] -> SDoc
vcat [ String -> SDoc
text String
"Constraint:"             SDoc -> SDoc -> SDoc
<+> [ErrorItem] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ErrorItem]
items
              , String -> SDoc
text String
"cec_suppress ="          SDoc -> SDoc -> SDoc
<+> Bool -> SDoc
forall a. Outputable a => a -> SDoc
ppr (SolverReportErrCtxt -> Bool
cec_suppress SolverReportErrCtxt
ctxt)
              , String -> SDoc
text String
"cec_defer_type_errors =" SDoc -> SDoc -> SDoc
<+> DiagnosticReason -> SDoc
forall a. Outputable a => a -> SDoc
ppr (SolverReportErrCtxt -> DiagnosticReason
cec_defer_type_errors SolverReportErrCtxt
ctxt) ]
       ; SolverReportErrCtxt -> [ErrorItem] -> SolverReport -> TcM ()
maybeReportError SolverReportErrCtxt
ctxt [ErrorItem]
items SolverReport
err
           
       ; String -> SDoc -> TcM ()
traceTc String
"reportGroup" ([ErrorItem] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ErrorItem]
items)
       ; (ErrorItem -> TcM ()) -> [ErrorItem] -> TcM ()
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
(a -> m b) -> t a -> m ()
mapM_ (SolverReportErrCtxt -> SolverReport -> ErrorItem -> TcM ()
addDeferredBinding SolverReportErrCtxt
ctxt SolverReport
err) [ErrorItem]
items }
           
           
           
           
nonDeferrableOrigin :: CtOrigin -> Bool
nonDeferrableOrigin :: CtOrigin -> Bool
nonDeferrableOrigin CtOrigin
NonLinearPatternOrigin  = Bool
True
nonDeferrableOrigin (UsageEnvironmentOf {}) = Bool
True
nonDeferrableOrigin (FRROrigin {})          = Bool
True
nonDeferrableOrigin CtOrigin
_                       = Bool
False
maybeReportError :: SolverReportErrCtxt
                 -> [ErrorItem]     
                 -> SolverReport -> TcM ()
maybeReportError :: SolverReportErrCtxt -> [ErrorItem] -> SolverReport -> TcM ()
maybeReportError SolverReportErrCtxt
ctxt items :: [ErrorItem]
items@(ErrorItem
item1:[ErrorItem]
_) (SolverReport { sr_important_msgs :: SolverReport -> [SolverReportWithCtxt]
sr_important_msgs = [SolverReportWithCtxt]
important
                                                    , sr_supplementary :: SolverReport -> [SolverReportSupplementary]
sr_supplementary = [SolverReportSupplementary]
supp
                                                    , sr_hints :: SolverReport -> [GhcHint]
sr_hints = [GhcHint]
hints })
  = Bool -> TcM () -> TcM ()
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
unless (SolverReportErrCtxt -> Bool
cec_suppress SolverReportErrCtxt
ctxt  
         Bool -> Bool -> Bool
|| (ErrorItem -> Bool) -> [ErrorItem] -> Bool
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
all ErrorItem -> Bool
ei_suppress [ErrorItem]
items) (TcM () -> TcM ()) -> TcM () -> TcM ()
forall a b. (a -> b) -> a -> b
$
                           
                           
                           
                           
    do let reason :: DiagnosticReason
reason | (ErrorItem -> Bool) -> [ErrorItem] -> Bool
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
any (CtOrigin -> Bool
nonDeferrableOrigin (CtOrigin -> Bool) -> (ErrorItem -> CtOrigin) -> ErrorItem -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ErrorItem -> CtOrigin
errorItemOrigin) [ErrorItem]
items = DiagnosticReason
ErrorWithoutFlag
                  | Bool
otherwise                                         = SolverReportErrCtxt -> DiagnosticReason
cec_defer_type_errors SolverReportErrCtxt
ctxt
                  
           diag :: TcRnMessage
diag = [SolverReportWithCtxt]
-> DiagnosticReason -> [GhcHint] -> TcRnMessage
TcRnSolverReport [SolverReportWithCtxt]
important DiagnosticReason
reason [GhcHint]
hints
       MsgEnvelope TcRnMessage
msg <- TcLclEnv
-> TcRnMessage
-> Maybe SolverReportErrCtxt
-> [SolverReportSupplementary]
-> TcM (MsgEnvelope TcRnMessage)
mkErrorReport (CtLoc -> TcLclEnv
ctLocEnv (ErrorItem -> CtLoc
errorItemCtLoc ErrorItem
item1)) TcRnMessage
diag (SolverReportErrCtxt -> Maybe SolverReportErrCtxt
forall a. a -> Maybe a
Just SolverReportErrCtxt
ctxt) [SolverReportSupplementary]
supp
       MsgEnvelope TcRnMessage -> TcM ()
reportDiagnostic MsgEnvelope TcRnMessage
msg
maybeReportError SolverReportErrCtxt
_ [ErrorItem]
_ SolverReport
_ = String -> TcM ()
forall a. String -> a
panic String
"maybeReportError"
addDeferredBinding :: SolverReportErrCtxt -> SolverReport -> ErrorItem -> TcM ()
addDeferredBinding :: SolverReportErrCtxt -> SolverReport -> ErrorItem -> TcM ()
addDeferredBinding SolverReportErrCtxt
ctxt SolverReport
err (EI { ei_evdest :: ErrorItem -> Maybe TcEvDest
ei_evdest = Just TcEvDest
dest, ei_pred :: ErrorItem -> Type
ei_pred = Type
item_ty
                                , ei_loc :: ErrorItem -> CtLoc
ei_loc = CtLoc
loc })
     
  | SolverReportErrCtxt -> Bool
deferringAnyBindings SolverReportErrCtxt
ctxt
  = do { EvTerm
err_tm <- SolverReportErrCtxt -> CtLoc -> Type -> SolverReport -> TcM EvTerm
mkErrorTerm SolverReportErrCtxt
ctxt CtLoc
loc Type
item_ty SolverReport
err
       ; let ev_binds_var :: EvBindsVar
ev_binds_var = SolverReportErrCtxt -> EvBindsVar
cec_binds SolverReportErrCtxt
ctxt
       ; case TcEvDest
dest of
           EvVarDest TcId
evar
             -> EvBindsVar -> EvBind -> TcM ()
addTcEvBind EvBindsVar
ev_binds_var (EvBind -> TcM ()) -> EvBind -> TcM ()
forall a b. (a -> b) -> a -> b
$ TcId -> EvTerm -> EvBind
mkWantedEvBind TcId
evar EvTerm
err_tm
           HoleDest CoercionHole
hole
             -> do { 
                     let co_var :: TcId
co_var = CoercionHole -> TcId
coHoleCoVar CoercionHole
hole
                   ; EvBindsVar -> EvBind -> TcM ()
addTcEvBind EvBindsVar
ev_binds_var (EvBind -> TcM ()) -> EvBind -> TcM ()
forall a b. (a -> b) -> a -> b
$ TcId -> EvTerm -> EvBind
mkWantedEvBind TcId
co_var EvTerm
err_tm
                   ; CoercionHole -> TcCoercionN -> TcM ()
fillCoercionHole CoercionHole
hole (TcId -> TcCoercionN
mkTcCoVarCo TcId
co_var) } }
addDeferredBinding SolverReportErrCtxt
_ SolverReport
_ ErrorItem
_ = () -> TcM ()
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return ()    
mkErrorTerm :: SolverReportErrCtxt -> CtLoc -> Type  
            -> SolverReport -> TcM EvTerm
mkErrorTerm :: SolverReportErrCtxt -> CtLoc -> Type -> SolverReport -> TcM EvTerm
mkErrorTerm SolverReportErrCtxt
ctxt CtLoc
ct_loc Type
ty (SolverReport { sr_important_msgs :: SolverReport -> [SolverReportWithCtxt]
sr_important_msgs = [SolverReportWithCtxt]
important, sr_supplementary :: SolverReport -> [SolverReportSupplementary]
sr_supplementary = [SolverReportSupplementary]
supp })
  = do { MsgEnvelope TcRnMessage
msg <- TcLclEnv
-> TcRnMessage
-> Maybe SolverReportErrCtxt
-> [SolverReportSupplementary]
-> TcM (MsgEnvelope TcRnMessage)
mkErrorReport
                  (CtLoc -> TcLclEnv
ctLocEnv CtLoc
ct_loc)
                  ([SolverReportWithCtxt]
-> DiagnosticReason -> [GhcHint] -> TcRnMessage
TcRnSolverReport [SolverReportWithCtxt]
important DiagnosticReason
ErrorWithoutFlag [GhcHint]
noHints) (SolverReportErrCtxt -> Maybe SolverReportErrCtxt
forall a. a -> Maybe a
Just SolverReportErrCtxt
ctxt) [SolverReportSupplementary]
supp
         
       ; DynFlags
dflags <- IOEnv (Env TcGblEnv TcLclEnv) DynFlags
forall (m :: * -> *). HasDynFlags m => m DynFlags
getDynFlags
       ; let err_msg :: SDoc
err_msg = MsgEnvelope TcRnMessage -> SDoc
forall e. Diagnostic e => MsgEnvelope e -> SDoc
pprLocMsgEnvelope MsgEnvelope TcRnMessage
msg
             err_str :: String
err_str = DynFlags -> SDoc -> String
showSDoc DynFlags
dflags (SDoc -> String) -> SDoc -> String
forall a b. (a -> b) -> a -> b
$
                       SDoc
err_msg SDoc -> SDoc -> SDoc
$$ String -> SDoc
text String
"(deferred type error)"
       ; EvTerm -> TcM EvTerm
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (EvTerm -> TcM EvTerm) -> EvTerm -> TcM EvTerm
forall a b. (a -> b) -> a -> b
$ Type -> String -> EvTerm
evDelayedError Type
ty String
err_str }
tryReporters :: SolverReportErrCtxt -> [ReporterSpec] -> [ErrorItem] -> TcM (SolverReportErrCtxt, [ErrorItem])
tryReporters :: SolverReportErrCtxt
-> [ReporterSpec]
-> [ErrorItem]
-> TcM (SolverReportErrCtxt, [ErrorItem])
tryReporters SolverReportErrCtxt
ctxt [ReporterSpec]
reporters [ErrorItem]
items
  = do { let ([ErrorItem]
vis_items, [ErrorItem]
invis_items)
               = (ErrorItem -> Bool) -> [ErrorItem] -> ([ErrorItem], [ErrorItem])
forall a. (a -> Bool) -> [a] -> ([a], [a])
partition (CtOrigin -> Bool
isVisibleOrigin (CtOrigin -> Bool) -> (ErrorItem -> CtOrigin) -> ErrorItem -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ErrorItem -> CtOrigin
errorItemOrigin) [ErrorItem]
items
       ; String -> SDoc -> TcM ()
traceTc String
"tryReporters {" ([ErrorItem] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ErrorItem]
vis_items SDoc -> SDoc -> SDoc
$$ [ErrorItem] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ErrorItem]
invis_items)
       ; (SolverReportErrCtxt
ctxt', [ErrorItem]
items') <- SolverReportErrCtxt
-> [ReporterSpec]
-> [ErrorItem]
-> [ErrorItem]
-> TcM (SolverReportErrCtxt, [ErrorItem])
go SolverReportErrCtxt
ctxt [ReporterSpec]
reporters [ErrorItem]
vis_items [ErrorItem]
invis_items
       ; String -> SDoc -> TcM ()
traceTc String
"tryReporters }" ([ErrorItem] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ErrorItem]
items')
       ; (SolverReportErrCtxt, [ErrorItem])
-> TcM (SolverReportErrCtxt, [ErrorItem])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (SolverReportErrCtxt
ctxt', [ErrorItem]
items') }
  where
    go :: SolverReportErrCtxt
-> [ReporterSpec]
-> [ErrorItem]
-> [ErrorItem]
-> TcM (SolverReportErrCtxt, [ErrorItem])
go SolverReportErrCtxt
ctxt [] [ErrorItem]
vis_items [ErrorItem]
invis_items
      = (SolverReportErrCtxt, [ErrorItem])
-> TcM (SolverReportErrCtxt, [ErrorItem])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (SolverReportErrCtxt
ctxt, [ErrorItem]
vis_items [ErrorItem] -> [ErrorItem] -> [ErrorItem]
forall a. [a] -> [a] -> [a]
++ [ErrorItem]
invis_items)
    go SolverReportErrCtxt
ctxt (ReporterSpec
r : [ReporterSpec]
rs) [ErrorItem]
vis_items [ErrorItem]
invis_items
       
       
      = do { (SolverReportErrCtxt
ctxt', [ErrorItem]
vis_items') <- SolverReportErrCtxt
-> ReporterSpec
-> [ErrorItem]
-> TcM (SolverReportErrCtxt, [ErrorItem])
tryReporter SolverReportErrCtxt
ctxt ReporterSpec
r [ErrorItem]
vis_items
           ; (SolverReportErrCtxt
ctxt'', [ErrorItem]
invis_items') <- SolverReportErrCtxt
-> ReporterSpec
-> [ErrorItem]
-> TcM (SolverReportErrCtxt, [ErrorItem])
tryReporter SolverReportErrCtxt
ctxt' ReporterSpec
r [ErrorItem]
invis_items
           ; SolverReportErrCtxt
-> [ReporterSpec]
-> [ErrorItem]
-> [ErrorItem]
-> TcM (SolverReportErrCtxt, [ErrorItem])
go SolverReportErrCtxt
ctxt'' [ReporterSpec]
rs [ErrorItem]
vis_items' [ErrorItem]
invis_items' }
                
                
                
tryReporter :: SolverReportErrCtxt -> ReporterSpec -> [ErrorItem] -> TcM (SolverReportErrCtxt, [ErrorItem])
tryReporter :: SolverReportErrCtxt
-> ReporterSpec
-> [ErrorItem]
-> TcM (SolverReportErrCtxt, [ErrorItem])
tryReporter SolverReportErrCtxt
ctxt (String
str, ErrorItem -> Pred -> Bool
keep_me,  Bool
suppress_after, Reporter
reporter) [ErrorItem]
items
  | [ErrorItem] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [ErrorItem]
yeses
  = (SolverReportErrCtxt, [ErrorItem])
-> TcM (SolverReportErrCtxt, [ErrorItem])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (SolverReportErrCtxt
ctxt, [ErrorItem]
items)
  | Bool
otherwise
  = do { String -> SDoc -> TcM ()
traceTc String
"tryReporter{ " (String -> SDoc
text String
str SDoc -> SDoc -> SDoc
<+> [ErrorItem] -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ErrorItem]
yeses)
       ; (()
_, Bool
no_errs) <- TcM () -> TcRn ((), Bool)
forall a. TcRn a -> TcRn (a, Bool)
askNoErrs (Reporter
reporter SolverReportErrCtxt
ctxt [ErrorItem]
yeses)
       ; let suppress_now :: Bool
suppress_now   = Bool -> Bool
not Bool
no_errs Bool -> Bool -> Bool
&& Bool
suppress_after
                            
             ctxt' :: SolverReportErrCtxt
ctxt' = SolverReportErrCtxt
ctxt { cec_suppress :: Bool
cec_suppress = Bool
suppress_now Bool -> Bool -> Bool
|| SolverReportErrCtxt -> Bool
cec_suppress SolverReportErrCtxt
ctxt }
       ; String -> SDoc -> TcM ()
traceTc String
"tryReporter end }" (String -> SDoc
text String
str SDoc -> SDoc -> SDoc
<+> Bool -> SDoc
forall a. Outputable a => a -> SDoc
ppr (SolverReportErrCtxt -> Bool
cec_suppress SolverReportErrCtxt
ctxt) SDoc -> SDoc -> SDoc
<+> Bool -> SDoc
forall a. Outputable a => a -> SDoc
ppr Bool
suppress_after)
       ; (SolverReportErrCtxt, [ErrorItem])
-> TcM (SolverReportErrCtxt, [ErrorItem])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (SolverReportErrCtxt
ctxt', [ErrorItem]
nos) }
  where
    ([ErrorItem]
yeses, [ErrorItem]
nos) = (ErrorItem -> Bool) -> [ErrorItem] -> ([ErrorItem], [ErrorItem])
forall a. (a -> Bool) -> [a] -> ([a], [a])
partition ErrorItem -> Bool
keep [ErrorItem]
items
    keep :: ErrorItem -> Bool
keep ErrorItem
item = ErrorItem -> Pred -> Bool
keep_me ErrorItem
item (Type -> Pred
classifyPredType (ErrorItem -> Type
errorItemPred ErrorItem
item))
mkErrorReport :: TcLclEnv
              -> TcRnMessage
                  
              -> Maybe SolverReportErrCtxt
                  
                  
                  
              -> [SolverReportSupplementary]
                  
              -> TcM (MsgEnvelope TcRnMessage)
mkErrorReport :: TcLclEnv
-> TcRnMessage
-> Maybe SolverReportErrCtxt
-> [SolverReportSupplementary]
-> TcM (MsgEnvelope TcRnMessage)
mkErrorReport TcLclEnv
tcl_env TcRnMessage
msg Maybe SolverReportErrCtxt
mb_ctxt [SolverReportSupplementary]
supplementary
  = do { Maybe SDoc
mb_context <- (SolverReportErrCtxt -> IOEnv (Env TcGblEnv TcLclEnv) SDoc)
-> Maybe SolverReportErrCtxt
-> IOEnv (Env TcGblEnv TcLclEnv) (Maybe SDoc)
forall (t :: * -> *) (f :: * -> *) a b.
(Traversable t, Applicative f) =>
(a -> f b) -> t a -> f (t b)
forall (f :: * -> *) a b.
Applicative f =>
(a -> f b) -> Maybe a -> f (Maybe b)
traverse (\ SolverReportErrCtxt
ctxt -> TidyEnv -> [ErrCtxt] -> IOEnv (Env TcGblEnv TcLclEnv) SDoc
mkErrInfo (SolverReportErrCtxt -> TidyEnv
cec_tidy SolverReportErrCtxt
ctxt) (TcLclEnv -> [ErrCtxt]
tcl_ctxt TcLclEnv
tcl_env)) Maybe SolverReportErrCtxt
mb_ctxt
       ; UnitState
unit_state <- (() :: Constraint) => HscEnv -> UnitState
HscEnv -> UnitState
hsc_units (HscEnv -> UnitState)
-> IOEnv (Env TcGblEnv TcLclEnv) HscEnv
-> IOEnv (Env TcGblEnv TcLclEnv) UnitState
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> IOEnv (Env TcGblEnv TcLclEnv) HscEnv
forall gbl lcl. TcRnIf gbl lcl HscEnv
getTopEnv
       ; HoleFitDispConfig
hfdc <- TcM HoleFitDispConfig
getHoleFitDispConfig
       ; let
           err_info :: ErrInfo
err_info =
             SDoc -> SDoc -> ErrInfo
ErrInfo
               (SDoc -> Maybe SDoc -> SDoc
forall a. a -> Maybe a -> a
fromMaybe SDoc
empty Maybe SDoc
mb_context)
               ([SDoc] -> SDoc
vcat ([SDoc] -> SDoc) -> [SDoc] -> SDoc
forall a b. (a -> b) -> a -> b
$ (SolverReportSupplementary -> SDoc)
-> [SolverReportSupplementary] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (HoleFitDispConfig -> SolverReportSupplementary -> SDoc
pprSolverReportSupplementary HoleFitDispConfig
hfdc) [SolverReportSupplementary]
supplementary)
       ; SrcSpan -> TcRnMessage -> TcM (MsgEnvelope TcRnMessage)
mkTcRnMessage
           (RealSrcSpan -> Maybe BufSpan -> SrcSpan
RealSrcSpan (TcLclEnv -> RealSrcSpan
tcl_loc TcLclEnv
tcl_env) Maybe BufSpan
forall a. Maybe a
Strict.Nothing)
           (UnitState -> TcRnMessageDetailed -> TcRnMessage
TcRnMessageWithInfo UnitState
unit_state (TcRnMessageDetailed -> TcRnMessage)
-> TcRnMessageDetailed -> TcRnMessage
forall a b. (a -> b) -> a -> b
$ ErrInfo -> TcRnMessage -> TcRnMessageDetailed
TcRnMessageDetailed ErrInfo
err_info TcRnMessage
msg) }
pprSolverReportSupplementary :: HoleFitDispConfig -> SolverReportSupplementary -> SDoc
pprSolverReportSupplementary :: HoleFitDispConfig -> SolverReportSupplementary -> SDoc
pprSolverReportSupplementary HoleFitDispConfig
hfdc = \case
  SupplementaryBindings RelevantBindings
binds -> RelevantBindings -> SDoc
pprRelevantBindings RelevantBindings
binds
  SupplementaryHoleFits ValidHoleFits
fits  -> HoleFitDispConfig -> ValidHoleFits -> SDoc
pprValidHoleFits HoleFitDispConfig
hfdc ValidHoleFits
fits
  SupplementaryCts      [(Type, RealSrcSpan)]
cts   -> [(Type, RealSrcSpan)] -> SDoc
pprConstraintsInclude [(Type, RealSrcSpan)]
cts
pprValidHoleFits :: HoleFitDispConfig -> ValidHoleFits -> SDoc
pprValidHoleFits :: HoleFitDispConfig -> ValidHoleFits -> SDoc
pprValidHoleFits HoleFitDispConfig
hfdc (ValidHoleFits (Fits [HoleFit]
fits Bool
discarded_fits) (Fits [HoleFit]
refs Bool
discarded_refs))
  = SDoc
fits_msg SDoc -> SDoc -> SDoc
$$ SDoc
refs_msg
  where
    fits_msg, refs_msg, fits_discard_msg, refs_discard_msg :: SDoc
    fits_msg :: SDoc
fits_msg = Bool -> SDoc -> SDoc
ppUnless ([HoleFit] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [HoleFit]
fits) (SDoc -> SDoc) -> SDoc -> SDoc
forall a b. (a -> b) -> a -> b
$
                    SDoc -> Int -> SDoc -> SDoc
hang (String -> SDoc
text String
"Valid hole fits include") Int
2 (SDoc -> SDoc) -> SDoc -> SDoc
forall a b. (a -> b) -> a -> b
$
                    [SDoc] -> SDoc
vcat ((HoleFit -> SDoc) -> [HoleFit] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (HoleFitDispConfig -> HoleFit -> SDoc
pprHoleFit HoleFitDispConfig
hfdc) [HoleFit]
fits)
                      SDoc -> SDoc -> SDoc
$$ Bool -> SDoc -> SDoc
ppWhen  Bool
discarded_fits SDoc
fits_discard_msg
    refs_msg :: SDoc
refs_msg = Bool -> SDoc -> SDoc
ppUnless ([HoleFit] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [HoleFit]
refs) (SDoc -> SDoc) -> SDoc -> SDoc
forall a b. (a -> b) -> a -> b
$
                  SDoc -> Int -> SDoc -> SDoc
hang (String -> SDoc
text String
"Valid refinement hole fits include") Int
2 (SDoc -> SDoc) -> SDoc -> SDoc
forall a b. (a -> b) -> a -> b
$
                  [SDoc] -> SDoc
vcat ((HoleFit -> SDoc) -> [HoleFit] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (HoleFitDispConfig -> HoleFit -> SDoc
pprHoleFit HoleFitDispConfig
hfdc) [HoleFit]
refs)
                    SDoc -> SDoc -> SDoc
$$ Bool -> SDoc -> SDoc
ppWhen Bool
discarded_refs SDoc
refs_discard_msg
    fits_discard_msg :: SDoc
fits_discard_msg =
      String -> SDoc
text String
"(Some hole fits suppressed;" SDoc -> SDoc -> SDoc
<+>
      String -> SDoc
text String
"use -fmax-valid-hole-fits=N" SDoc -> SDoc -> SDoc
<+>
      String -> SDoc
text String
"or -fno-max-valid-hole-fits)"
    refs_discard_msg :: SDoc
refs_discard_msg =
      String -> SDoc
text String
"(Some refinement hole fits suppressed;" SDoc -> SDoc -> SDoc
<+>
      String -> SDoc
text String
"use -fmax-refinement-hole-fits=N" SDoc -> SDoc -> SDoc
<+>
      String -> SDoc
text String
"or -fno-max-refinement-hole-fits)"
pprConstraintsInclude :: [(PredType, RealSrcSpan)] -> SDoc
pprConstraintsInclude :: [(Type, RealSrcSpan)] -> SDoc
pprConstraintsInclude [(Type, RealSrcSpan)]
cts
  = Bool -> SDoc -> SDoc
ppUnless ([(Type, RealSrcSpan)] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [(Type, RealSrcSpan)]
cts) (SDoc -> SDoc) -> SDoc -> SDoc
forall a b. (a -> b) -> a -> b
$
     SDoc -> Int -> SDoc -> SDoc
hang (String -> SDoc
text String
"Constraints include")
        Int
2 ([SDoc] -> SDoc
vcat ([SDoc] -> SDoc) -> [SDoc] -> SDoc
forall a b. (a -> b) -> a -> b
$ ((Type, RealSrcSpan) -> SDoc) -> [(Type, RealSrcSpan)] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (Type, RealSrcSpan) -> SDoc
forall {a} {a}. (Outputable a, Outputable a) => (a, a) -> SDoc
pprConstraint [(Type, RealSrcSpan)]
cts)
  where
    pprConstraint :: (a, a) -> SDoc
pprConstraint (a
constraint, a
loc) =
      a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
constraint SDoc -> SDoc -> SDoc
<+> Int -> SDoc -> SDoc
nest Int
2 (SDoc -> SDoc
parens (String -> SDoc
text String
"from" SDoc -> SDoc -> SDoc
<+> a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
loc))
mkIrredErr :: SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkIrredErr :: SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkIrredErr SolverReportErrCtxt
ctxt [ErrorItem]
items
  = do { (SolverReportErrCtxt
ctxt, RelevantBindings
binds_msg, ErrorItem
item1) <- Bool
-> SolverReportErrCtxt
-> ErrorItem
-> TcM (SolverReportErrCtxt, RelevantBindings, ErrorItem)
relevantBindings Bool
True SolverReportErrCtxt
ctxt ErrorItem
item1
       ; let msg :: SolverReport
msg = SolverReportErrCtxt -> TcSolverReportMsg -> SolverReport
important SolverReportErrCtxt
ctxt (TcSolverReportMsg -> SolverReport)
-> TcSolverReportMsg -> SolverReport
forall a b. (a -> b) -> a -> b
$
                   [Implication]
-> NonEmpty ErrorItem -> Maybe CND_Extra -> TcSolverReportMsg
CouldNotDeduce (SolverReportErrCtxt -> [Implication]
getUserGivens SolverReportErrCtxt
ctxt) (ErrorItem
item1 ErrorItem -> [ErrorItem] -> NonEmpty ErrorItem
forall a. a -> [a] -> NonEmpty a
:| [ErrorItem]
others) Maybe CND_Extra
forall a. Maybe a
Nothing
       ; SolverReport -> TcM SolverReport
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (SolverReport -> TcM SolverReport)
-> SolverReport -> TcM SolverReport
forall a b. (a -> b) -> a -> b
$ SolverReport
msg SolverReport -> SolverReport -> SolverReport
forall a. Monoid a => a -> a -> a
`mappend` RelevantBindings -> SolverReport
mk_relevant_bindings RelevantBindings
binds_msg }
  where
    (ErrorItem
item1:[ErrorItem]
others) = [ErrorItem]
final_items
    filtered_items :: [ErrorItem]
filtered_items = (ErrorItem -> Bool) -> [ErrorItem] -> [ErrorItem]
forall a. (a -> Bool) -> [a] -> [a]
filter (Bool -> Bool
not (Bool -> Bool) -> (ErrorItem -> Bool) -> ErrorItem -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ErrorItem -> Bool
ei_suppress) [ErrorItem]
items
    final_items :: [ErrorItem]
final_items | [ErrorItem] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [ErrorItem]
filtered_items = [ErrorItem]
items
                    
                    
                    
                    
                    
                | Bool
otherwise           = [ErrorItem]
filtered_items
mkHoleError :: NameEnv Type -> [ErrorItem] -> SolverReportErrCtxt -> Hole -> TcM (MsgEnvelope TcRnMessage)
mkHoleError :: NameEnv Type
-> [ErrorItem]
-> SolverReportErrCtxt
-> Hole
-> TcM (MsgEnvelope TcRnMessage)
mkHoleError NameEnv Type
_ [ErrorItem]
_tidy_simples SolverReportErrCtxt
ctxt hole :: Hole
hole@(Hole { hole_occ :: Hole -> OccName
hole_occ = OccName
occ, hole_loc :: Hole -> CtLoc
hole_loc = CtLoc
ct_loc })
  | Hole -> Bool
isOutOfScopeHole Hole
hole
  = do { DynFlags
dflags  <- IOEnv (Env TcGblEnv TcLclEnv) DynFlags
forall (m :: * -> *). HasDynFlags m => m DynFlags
getDynFlags
       ; GlobalRdrEnv
rdr_env <- TcRn GlobalRdrEnv
getGlobalRdrEnv
       ; ImportAvails
imp_info <- TcRn ImportAvails
getImports
       ; Module
curr_mod <- IOEnv (Env TcGblEnv TcLclEnv) Module
forall (m :: * -> *). HasModule m => m Module
getModule
       ; HomePackageTable
hpt <- TcRnIf TcGblEnv TcLclEnv HomePackageTable
forall gbl lcl. TcRnIf gbl lcl HomePackageTable
getHpt
       ; let ([ImportError]
imp_errs, [GhcHint]
hints)
                = WhatLooking
-> DynFlags
-> HomePackageTable
-> Module
-> GlobalRdrEnv
-> LocalRdrEnv
-> ImportAvails
-> RdrName
-> ([ImportError], [GhcHint])
unknownNameSuggestions WhatLooking
WL_Anything
                    DynFlags
dflags HomePackageTable
hpt Module
curr_mod GlobalRdrEnv
rdr_env
                    (TcLclEnv -> LocalRdrEnv
tcl_rdr TcLclEnv
lcl_env) ImportAvails
imp_info (OccName -> RdrName
mkRdrUnqual OccName
occ)
             errs :: [SolverReportWithCtxt]
errs   = [SolverReportErrCtxt -> TcSolverReportMsg -> SolverReportWithCtxt
SolverReportWithCtxt SolverReportErrCtxt
ctxt (Hole -> HoleError -> TcSolverReportMsg
ReportHoleError Hole
hole (HoleError -> TcSolverReportMsg) -> HoleError -> TcSolverReportMsg
forall a b. (a -> b) -> a -> b
$ [ImportError] -> HoleError
OutOfScopeHole [ImportError]
imp_errs)]
             report :: SolverReport
report = [SolverReportWithCtxt]
-> [SolverReportSupplementary] -> [GhcHint] -> SolverReport
SolverReport [SolverReportWithCtxt]
errs [] [GhcHint]
hints
       ; SolverReportErrCtxt -> Hole -> SolverReport -> TcM ()
maybeAddDeferredBindings SolverReportErrCtxt
ctxt Hole
hole SolverReport
report
       ; TcLclEnv
-> TcRnMessage
-> Maybe SolverReportErrCtxt
-> [SolverReportSupplementary]
-> TcM (MsgEnvelope TcRnMessage)
mkErrorReport TcLclEnv
lcl_env ([SolverReportWithCtxt]
-> DiagnosticReason -> [GhcHint] -> TcRnMessage
TcRnSolverReport [SolverReportWithCtxt]
errs (SolverReportErrCtxt -> DiagnosticReason
cec_out_of_scope_holes SolverReportErrCtxt
ctxt) [GhcHint]
hints) Maybe SolverReportErrCtxt
forall a. Maybe a
Nothing []
          
          
       }
  where
    lcl_env :: TcLclEnv
lcl_env = CtLoc -> TcLclEnv
ctLocEnv CtLoc
ct_loc
 
mkHoleError NameEnv Type
lcl_name_cache [ErrorItem]
tidy_simples SolverReportErrCtxt
ctxt
  hole :: Hole
hole@(Hole { hole_ty :: Hole -> Type
hole_ty = Type
hole_ty
             , hole_sort :: Hole -> HoleSort
hole_sort = HoleSort
sort
             , hole_loc :: Hole -> CtLoc
hole_loc = CtLoc
ct_loc })
  = do { RelevantBindings
rel_binds
           <- Bool
-> TcLclEnv -> NameEnv Type -> TyCoVarSet -> TcM RelevantBindings
relevant_bindings Bool
False TcLclEnv
lcl_env NameEnv Type
lcl_name_cache (Type -> TyCoVarSet
tyCoVarsOfType Type
hole_ty)
               
       ; Bool
show_hole_constraints <- GeneralFlag -> TcRnIf TcGblEnv TcLclEnv Bool
forall gbl lcl. GeneralFlag -> TcRnIf gbl lcl Bool
goptM GeneralFlag
Opt_ShowHoleConstraints
       ; let relevant_cts :: [(Type, RealSrcSpan)]
relevant_cts
               | ExprHole HoleExprRef
_ <- HoleSort
sort, Bool
show_hole_constraints
               = SolverReportErrCtxt -> [(Type, RealSrcSpan)]
givenConstraints SolverReportErrCtxt
ctxt
               | Bool
otherwise
               = []
       ; Bool
show_valid_hole_fits <- GeneralFlag -> TcRnIf TcGblEnv TcLclEnv Bool
forall gbl lcl. GeneralFlag -> TcRnIf gbl lcl Bool
goptM GeneralFlag
Opt_ShowValidHoleFits
       ; (SolverReportErrCtxt
ctxt, ValidHoleFits
hole_fits) <- if Bool
show_valid_hole_fits
                              then SolverReportErrCtxt
-> [ErrorItem] -> Hole -> TcM (SolverReportErrCtxt, ValidHoleFits)
validHoleFits SolverReportErrCtxt
ctxt [ErrorItem]
tidy_simples Hole
hole
                              else (SolverReportErrCtxt, ValidHoleFits)
-> TcM (SolverReportErrCtxt, ValidHoleFits)
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (SolverReportErrCtxt
ctxt, ValidHoleFits
noValidHoleFits)
       ; ([(SkolemInfoAnon, [TcId])]
grouped_skvs, [TcId]
other_tvs) <- Type -> TcM ([(SkolemInfoAnon, [TcId])], [TcId])
zonkAndGroupSkolTvs Type
hole_ty
       ; let reason :: DiagnosticReason
reason | ExprHole HoleExprRef
_ <- HoleSort
sort = SolverReportErrCtxt -> DiagnosticReason
cec_expr_holes SolverReportErrCtxt
ctxt
                    | Bool
otherwise          = SolverReportErrCtxt -> DiagnosticReason
cec_type_holes SolverReportErrCtxt
ctxt
             errs :: [SolverReportWithCtxt]
errs = [SolverReportErrCtxt -> TcSolverReportMsg -> SolverReportWithCtxt
SolverReportWithCtxt SolverReportErrCtxt
ctxt (TcSolverReportMsg -> SolverReportWithCtxt)
-> TcSolverReportMsg -> SolverReportWithCtxt
forall a b. (a -> b) -> a -> b
$ Hole -> HoleError -> TcSolverReportMsg
ReportHoleError Hole
hole (HoleError -> TcSolverReportMsg) -> HoleError -> TcSolverReportMsg
forall a b. (a -> b) -> a -> b
$ HoleSort -> [TcId] -> [(SkolemInfoAnon, [TcId])] -> HoleError
HoleError HoleSort
sort [TcId]
other_tvs [(SkolemInfoAnon, [TcId])]
grouped_skvs]
             supp :: [SolverReportSupplementary]
supp = [ RelevantBindings -> SolverReportSupplementary
SupplementaryBindings RelevantBindings
rel_binds
                    , [(Type, RealSrcSpan)] -> SolverReportSupplementary
SupplementaryCts      [(Type, RealSrcSpan)]
relevant_cts
                    , ValidHoleFits -> SolverReportSupplementary
SupplementaryHoleFits ValidHoleFits
hole_fits ]
       ; SolverReportErrCtxt -> Hole -> SolverReport -> TcM ()
maybeAddDeferredBindings SolverReportErrCtxt
ctxt Hole
hole ([SolverReportWithCtxt]
-> [SolverReportSupplementary] -> [GhcHint] -> SolverReport
SolverReport [SolverReportWithCtxt]
errs [SolverReportSupplementary]
supp [])
       ; TcLclEnv
-> TcRnMessage
-> Maybe SolverReportErrCtxt
-> [SolverReportSupplementary]
-> TcM (MsgEnvelope TcRnMessage)
mkErrorReport TcLclEnv
lcl_env ([SolverReportWithCtxt]
-> DiagnosticReason -> [GhcHint] -> TcRnMessage
TcRnSolverReport [SolverReportWithCtxt]
errs DiagnosticReason
reason [GhcHint]
noHints) (SolverReportErrCtxt -> Maybe SolverReportErrCtxt
forall a. a -> Maybe a
Just SolverReportErrCtxt
ctxt) [SolverReportSupplementary]
supp
       }
  where
    lcl_env :: TcLclEnv
lcl_env = CtLoc -> TcLclEnv
ctLocEnv CtLoc
ct_loc
zonkAndGroupSkolTvs :: Type -> TcM ([(SkolemInfoAnon, [TcTyVar])], [TcTyVar])
zonkAndGroupSkolTvs :: Type -> TcM ([(SkolemInfoAnon, [TcId])], [TcId])
zonkAndGroupSkolTvs Type
hole_ty = do
  [(SkolemInfoAnon, [TcId])]
zonked_info <- ((SkolemInfo, [(TcId, Int)])
 -> IOEnv (Env TcGblEnv TcLclEnv) (SkolemInfoAnon, [TcId]))
-> [(SkolemInfo, [(TcId, Int)])]
-> IOEnv (Env TcGblEnv TcLclEnv) [(SkolemInfoAnon, [TcId])]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
forall (m :: * -> *) a b. Monad m => (a -> m b) -> [a] -> m [b]
mapM (\(SkolemInfo
sk, [(TcId, Int)]
tv) -> (,) (SkolemInfoAnon -> [TcId] -> (SkolemInfoAnon, [TcId]))
-> IOEnv (Env TcGblEnv TcLclEnv) SkolemInfoAnon
-> IOEnv
     (Env TcGblEnv TcLclEnv) ([TcId] -> (SkolemInfoAnon, [TcId]))
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> (SkolemInfoAnon -> IOEnv (Env TcGblEnv TcLclEnv) SkolemInfoAnon
zonkSkolemInfoAnon (SkolemInfoAnon -> IOEnv (Env TcGblEnv TcLclEnv) SkolemInfoAnon)
-> (SkolemInfo -> SkolemInfoAnon)
-> SkolemInfo
-> IOEnv (Env TcGblEnv TcLclEnv) SkolemInfoAnon
forall b c a. (b -> c) -> (a -> b) -> a -> c
. SkolemInfo -> SkolemInfoAnon
getSkolemInfo (SkolemInfo -> IOEnv (Env TcGblEnv TcLclEnv) SkolemInfoAnon)
-> SkolemInfo -> IOEnv (Env TcGblEnv TcLclEnv) SkolemInfoAnon
forall a b. (a -> b) -> a -> b
$ SkolemInfo
sk) IOEnv (Env TcGblEnv TcLclEnv) ([TcId] -> (SkolemInfoAnon, [TcId]))
-> IOEnv (Env TcGblEnv TcLclEnv) [TcId]
-> IOEnv (Env TcGblEnv TcLclEnv) (SkolemInfoAnon, [TcId])
forall a b.
IOEnv (Env TcGblEnv TcLclEnv) (a -> b)
-> IOEnv (Env TcGblEnv TcLclEnv) a
-> IOEnv (Env TcGblEnv TcLclEnv) b
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> [TcId] -> IOEnv (Env TcGblEnv TcLclEnv) [TcId]
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (f :: * -> *) a. Applicative f => a -> f a
pure ((TcId, Int) -> TcId
forall a b. (a, b) -> a
fst ((TcId, Int) -> TcId) -> [(TcId, Int)] -> [TcId]
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> [(TcId, Int)]
tv)) [(SkolemInfo, [(TcId, Int)])]
skolem_list
  ([(SkolemInfoAnon, [TcId])], [TcId])
-> TcM ([(SkolemInfoAnon, [TcId])], [TcId])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return ([(SkolemInfoAnon, [TcId])]
zonked_info, [TcId]
other_tvs)
  where
    tvs :: [TcId]
tvs = Type -> [TcId]
tyCoVarsOfTypeList Type
hole_ty
    ([TcId]
skol_tvs, [TcId]
other_tvs) = (TcId -> Bool) -> [TcId] -> ([TcId], [TcId])
forall a. (a -> Bool) -> [a] -> ([a], [a])
partition (\TcId
tv -> TcId -> Bool
isTcTyVar TcId
tv Bool -> Bool -> Bool
&& TcId -> Bool
isSkolemTyVar TcId
tv) [TcId]
tvs
    group_skolems :: UM.UniqMap SkolemInfo ([(TcTyVar, Int)])
    group_skolems :: UniqMap SkolemInfo [(TcId, Int)]
group_skolems = Bag (TcId, Int) -> [(TcId, Int)]
forall a. Bag a -> [a]
bagToList (Bag (TcId, Int) -> [(TcId, Int)])
-> UniqMap SkolemInfo (Bag (TcId, Int))
-> UniqMap SkolemInfo [(TcId, Int)]
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> (Bag (TcId, Int) -> Bag (TcId, Int) -> Bag (TcId, Int))
-> [(SkolemInfo, Bag (TcId, Int))]
-> UniqMap SkolemInfo (Bag (TcId, Int))
forall k a. Uniquable k => (a -> a -> a) -> [(k, a)] -> UniqMap k a
UM.listToUniqMap_C Bag (TcId, Int) -> Bag (TcId, Int) -> Bag (TcId, Int)
forall a. Bag a -> Bag a -> Bag a
unionBags [(TcId -> SkolemInfo
skolemSkolInfo TcId
tv, (TcId, Int) -> Bag (TcId, Int)
forall a. a -> Bag a
unitBag (TcId
tv, Int
n)) | TcId
tv <- [TcId]
skol_tvs | Int
n <- [Int
0..]]
    skolem_list :: [(SkolemInfo, [(TcId, Int)])]
skolem_list = ((SkolemInfo, [(TcId, Int)])
 -> (SkolemInfo, [(TcId, Int)]) -> Ordering)
-> [(SkolemInfo, [(TcId, Int)])] -> [(SkolemInfo, [(TcId, Int)])]
forall a. (a -> a -> Ordering) -> [a] -> [a]
sortBy (((SkolemInfo, [(TcId, Int)]) -> [Int])
-> (SkolemInfo, [(TcId, Int)])
-> (SkolemInfo, [(TcId, Int)])
-> Ordering
forall a b. Ord a => (b -> a) -> b -> b -> Ordering
comparing ([Int] -> [Int]
forall a. Ord a => [a] -> [a]
sort ([Int] -> [Int])
-> ((SkolemInfo, [(TcId, Int)]) -> [Int])
-> (SkolemInfo, [(TcId, Int)])
-> [Int]
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ((TcId, Int) -> Int) -> [(TcId, Int)] -> [Int]
forall a b. (a -> b) -> [a] -> [b]
map (TcId, Int) -> Int
forall a b. (a, b) -> b
snd ([(TcId, Int)] -> [Int])
-> ((SkolemInfo, [(TcId, Int)]) -> [(TcId, Int)])
-> (SkolemInfo, [(TcId, Int)])
-> [Int]
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (SkolemInfo, [(TcId, Int)]) -> [(TcId, Int)]
forall a b. (a, b) -> b
snd)) (UniqMap SkolemInfo [(TcId, Int)] -> [(SkolemInfo, [(TcId, Int)])]
forall k a. UniqMap k a -> [(k, a)]
UM.nonDetEltsUniqMap UniqMap SkolemInfo [(TcId, Int)]
group_skolems)
maybeAddDeferredBindings :: SolverReportErrCtxt
                         -> Hole
                         -> SolverReport
                         -> TcM ()
maybeAddDeferredBindings :: SolverReportErrCtxt -> Hole -> SolverReport -> TcM ()
maybeAddDeferredBindings SolverReportErrCtxt
ctxt Hole
hole SolverReport
report = do
  case Hole -> HoleSort
hole_sort Hole
hole of
    ExprHole (HER IORef EvTerm
ref Type
ref_ty Unique
_) -> do
      
      
      
      Bool -> TcM () -> TcM ()
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
when (SolverReportErrCtxt -> Bool
deferringAnyBindings SolverReportErrCtxt
ctxt) (TcM () -> TcM ()) -> TcM () -> TcM ()
forall a b. (a -> b) -> a -> b
$ do
        EvTerm
err_tm <- SolverReportErrCtxt -> CtLoc -> Type -> SolverReport -> TcM EvTerm
mkErrorTerm SolverReportErrCtxt
ctxt (Hole -> CtLoc
hole_loc Hole
hole) Type
ref_ty SolverReport
report
          
          
        IORef EvTerm -> EvTerm -> TcM ()
forall a env. IORef a -> a -> IOEnv env ()
writeMutVar IORef EvTerm
ref EvTerm
err_tm
    HoleSort
_ -> () -> TcM ()
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (f :: * -> *) a. Applicative f => a -> f a
pure ()
validHoleFits :: SolverReportErrCtxt    
                                        
              -> [ErrorItem]      
              -> Hole             
              -> TcM (SolverReportErrCtxt, ValidHoleFits)
                
                
                
                
validHoleFits :: SolverReportErrCtxt
-> [ErrorItem] -> Hole -> TcM (SolverReportErrCtxt, ValidHoleFits)
validHoleFits ctxt :: SolverReportErrCtxt
ctxt@(CEC { cec_encl :: SolverReportErrCtxt -> [Implication]
cec_encl = [Implication]
implics
                        , cec_tidy :: SolverReportErrCtxt -> TidyEnv
cec_tidy = TidyEnv
lcl_env}) [ErrorItem]
simps Hole
hole
  = do { (TidyEnv
tidy_env, ValidHoleFits
fits) <- TidyEnv
-> [Implication]
-> [CtEvidence]
-> Hole
-> TcM (TidyEnv, ValidHoleFits)
findValidHoleFits TidyEnv
lcl_env [Implication]
implics ((ErrorItem -> CtEvidence) -> [ErrorItem] -> [CtEvidence]
forall a b. (a -> b) -> [a] -> [b]
map ErrorItem -> CtEvidence
mk_wanted [ErrorItem]
simps) Hole
hole
       ; (SolverReportErrCtxt, ValidHoleFits)
-> TcM (SolverReportErrCtxt, ValidHoleFits)
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (SolverReportErrCtxt
ctxt {cec_tidy :: TidyEnv
cec_tidy = TidyEnv
tidy_env}, ValidHoleFits
fits) }
  where
    mk_wanted :: ErrorItem -> CtEvidence
    mk_wanted :: ErrorItem -> CtEvidence
mk_wanted (EI { ei_pred :: ErrorItem -> Type
ei_pred = Type
pred, ei_evdest :: ErrorItem -> Maybe TcEvDest
ei_evdest = Just TcEvDest
dest, ei_loc :: ErrorItem -> CtLoc
ei_loc = CtLoc
loc })
         = CtWanted { ctev_pred :: Type
ctev_pred      = Type
pred
                    , ctev_dest :: TcEvDest
ctev_dest      = TcEvDest
dest
                    , ctev_loc :: CtLoc
ctev_loc       = CtLoc
loc
                    , ctev_rewriters :: RewriterSet
ctev_rewriters = RewriterSet
emptyRewriterSet }
    mk_wanted ErrorItem
item = String -> SDoc -> CtEvidence
forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"validHoleFits no evdest" (ErrorItem -> SDoc
forall a. Outputable a => a -> SDoc
ppr ErrorItem
item)
givenConstraints :: SolverReportErrCtxt -> [(Type, RealSrcSpan)]
givenConstraints :: SolverReportErrCtxt -> [(Type, RealSrcSpan)]
givenConstraints SolverReportErrCtxt
ctxt
  = do { implic :: Implication
implic@Implic{ ic_given :: Implication -> [TcId]
ic_given = [TcId]
given } <- SolverReportErrCtxt -> [Implication]
cec_encl SolverReportErrCtxt
ctxt
       ; TcId
constraint <- [TcId]
given
       ; (Type, RealSrcSpan) -> [(Type, RealSrcSpan)]
forall a. a -> [a]
forall (m :: * -> *) a. Monad m => a -> m a
return (TcId -> Type
varType TcId
constraint, TcLclEnv -> RealSrcSpan
tcl_loc (Implication -> TcLclEnv
ic_env Implication
implic)) }
mkIPErr :: SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkIPErr :: SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkIPErr SolverReportErrCtxt
ctxt [ErrorItem]
items
  = do { (SolverReportErrCtxt
ctxt, RelevantBindings
binds_msg, ErrorItem
item1) <- Bool
-> SolverReportErrCtxt
-> ErrorItem
-> TcM (SolverReportErrCtxt, RelevantBindings, ErrorItem)
relevantBindings Bool
True SolverReportErrCtxt
ctxt ErrorItem
item1
       ; let msg :: SolverReport
msg = SolverReportErrCtxt -> TcSolverReportMsg -> SolverReport
important SolverReportErrCtxt
ctxt (TcSolverReportMsg -> SolverReport)
-> TcSolverReportMsg -> SolverReport
forall a b. (a -> b) -> a -> b
$ NonEmpty ErrorItem -> TcSolverReportMsg
UnboundImplicitParams (ErrorItem
item1 ErrorItem -> [ErrorItem] -> NonEmpty ErrorItem
forall a. a -> [a] -> NonEmpty a
:| [ErrorItem]
others)
       ; SolverReport -> TcM SolverReport
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (SolverReport -> TcM SolverReport)
-> SolverReport -> TcM SolverReport
forall a b. (a -> b) -> a -> b
$ SolverReport
msg SolverReport -> SolverReport -> SolverReport
forall a. Monoid a => a -> a -> a
`mappend` RelevantBindings -> SolverReport
mk_relevant_bindings RelevantBindings
binds_msg }
  where
    ErrorItem
item1:[ErrorItem]
others = [ErrorItem]
items
mkFRRErr :: HasDebugCallStack => SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkFRRErr :: (() :: Constraint) =>
SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkFRRErr SolverReportErrCtxt
ctxt [ErrorItem]
items
  = do { 
       ; (TidyEnv
_tidy_env, [FixedRuntimeRepErrorInfo]
frr_infos) <-
          TidyEnv
-> [FixedRuntimeRepErrorInfo]
-> TcM (TidyEnv, [FixedRuntimeRepErrorInfo])
zonkTidyFRRInfos (SolverReportErrCtxt -> TidyEnv
cec_tidy SolverReportErrCtxt
ctxt) ([FixedRuntimeRepErrorInfo]
 -> TcM (TidyEnv, [FixedRuntimeRepErrorInfo]))
-> [FixedRuntimeRepErrorInfo]
-> TcM (TidyEnv, [FixedRuntimeRepErrorInfo])
forall a b. (a -> b) -> a -> b
$
            
          (FixedRuntimeRepErrorInfo -> FixedRuntimeRepErrorInfo -> Ordering)
-> [FixedRuntimeRepErrorInfo] -> [FixedRuntimeRepErrorInfo]
forall a. (a -> a -> Ordering) -> [a] -> [a]
nubOrdBy (Type -> Type -> Ordering
nonDetCmpType (Type -> Type -> Ordering)
-> (FixedRuntimeRepErrorInfo -> Type)
-> FixedRuntimeRepErrorInfo
-> FixedRuntimeRepErrorInfo
-> Ordering
forall b c a. (b -> b -> c) -> (a -> b) -> a -> a -> c
`on` (FixedRuntimeRepOrigin -> Type
frr_type (FixedRuntimeRepOrigin -> Type)
-> (FixedRuntimeRepErrorInfo -> FixedRuntimeRepOrigin)
-> FixedRuntimeRepErrorInfo
-> Type
forall b c a. (b -> c) -> (a -> b) -> a -> c
. FixedRuntimeRepErrorInfo -> FixedRuntimeRepOrigin
frr_info_origin)) ([FixedRuntimeRepErrorInfo] -> [FixedRuntimeRepErrorInfo])
-> [FixedRuntimeRepErrorInfo] -> [FixedRuntimeRepErrorInfo]
forall a b. (a -> b) -> a -> b
$
            
          (ErrorItem -> FixedRuntimeRepErrorInfo)
-> [ErrorItem] -> [FixedRuntimeRepErrorInfo]
forall a b. (a -> b) -> [a] -> [b]
map (String
-> Maybe FixedRuntimeRepErrorInfo -> FixedRuntimeRepErrorInfo
forall a. HasCallStack => String -> Maybe a -> a
expectJust String
"mkFRRErr" (Maybe FixedRuntimeRepErrorInfo -> FixedRuntimeRepErrorInfo)
-> (ErrorItem -> Maybe FixedRuntimeRepErrorInfo)
-> ErrorItem
-> FixedRuntimeRepErrorInfo
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (() :: Constraint) => ErrorItem -> Maybe FixedRuntimeRepErrorInfo
ErrorItem -> Maybe FixedRuntimeRepErrorInfo
fixedRuntimeRepOrigin_maybe)
          [ErrorItem]
items
       ; SolverReport -> TcM SolverReport
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (SolverReport -> TcM SolverReport)
-> SolverReport -> TcM SolverReport
forall a b. (a -> b) -> a -> b
$ SolverReportErrCtxt -> TcSolverReportMsg -> SolverReport
important SolverReportErrCtxt
ctxt (TcSolverReportMsg -> SolverReport)
-> TcSolverReportMsg -> SolverReport
forall a b. (a -> b) -> a -> b
$ [FixedRuntimeRepErrorInfo] -> TcSolverReportMsg
FixedRuntimeRepError [FixedRuntimeRepErrorInfo]
frr_infos }
fixedRuntimeRepOrigin_maybe :: HasDebugCallStack => ErrorItem -> Maybe FixedRuntimeRepErrorInfo
fixedRuntimeRepOrigin_maybe :: (() :: Constraint) => ErrorItem -> Maybe FixedRuntimeRepErrorInfo
fixedRuntimeRepOrigin_maybe ErrorItem
item
  
  | FRROrigin FixedRuntimeRepOrigin
frr_orig <- ErrorItem -> CtOrigin
errorItemOrigin ErrorItem
item
  = FixedRuntimeRepErrorInfo -> Maybe FixedRuntimeRepErrorInfo
forall a. a -> Maybe a
Just (FixedRuntimeRepErrorInfo -> Maybe FixedRuntimeRepErrorInfo)
-> FixedRuntimeRepErrorInfo -> Maybe FixedRuntimeRepErrorInfo
forall a b. (a -> b) -> a -> b
$ FRR_Info { frr_info_origin :: FixedRuntimeRepOrigin
frr_info_origin = FixedRuntimeRepOrigin
frr_orig
                    , frr_info_not_concrete :: Maybe (TcId, Type)
frr_info_not_concrete = Maybe (TcId, Type)
forall a. Maybe a
Nothing }
  
  
  
  | Bool
otherwise
  = Maybe FixedRuntimeRepErrorInfo
forall a. Maybe a
Nothing
mkEqErr :: SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkEqErr :: SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkEqErr SolverReportErrCtxt
ctxt [ErrorItem]
items
  | ErrorItem
item:[ErrorItem]
_ <- (ErrorItem -> Bool) -> [ErrorItem] -> [ErrorItem]
forall a. (a -> Bool) -> [a] -> [a]
filter (Bool -> Bool
not (Bool -> Bool) -> (ErrorItem -> Bool) -> ErrorItem -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ErrorItem -> Bool
ei_suppress) [ErrorItem]
items
  = SolverReportErrCtxt -> ErrorItem -> TcM SolverReport
mkEqErr1 SolverReportErrCtxt
ctxt ErrorItem
item
  | ErrorItem
item:[ErrorItem]
_ <- [ErrorItem]
items  
                     
  = SolverReportErrCtxt -> ErrorItem -> TcM SolverReport
mkEqErr1 SolverReportErrCtxt
ctxt ErrorItem
item
  | Bool
otherwise
  = String -> TcM SolverReport
forall a. String -> a
panic String
"mkEqErr"  
mkEqErr1 :: SolverReportErrCtxt -> ErrorItem -> TcM SolverReport
mkEqErr1 :: SolverReportErrCtxt -> ErrorItem -> TcM SolverReport
mkEqErr1 SolverReportErrCtxt
ctxt ErrorItem
item   
                     
  = do { (SolverReportErrCtxt
ctxt, RelevantBindings
binds_msg, ErrorItem
item) <- Bool
-> SolverReportErrCtxt
-> ErrorItem
-> TcM (SolverReportErrCtxt, RelevantBindings, ErrorItem)
relevantBindings Bool
True SolverReportErrCtxt
ctxt ErrorItem
item
       ; GlobalRdrEnv
rdr_env <- TcRn GlobalRdrEnv
getGlobalRdrEnv
       ; FamInstEnvs
fam_envs <- TcM FamInstEnvs
tcGetFamInstEnvs
       ; let mb_coercible_msg :: Maybe TcSolverReportInfo
mb_coercible_msg = case ErrorItem -> EqRel
errorItemEqRel ErrorItem
item of
               EqRel
NomEq  -> Maybe TcSolverReportInfo
forall a. Maybe a
Nothing
               EqRel
ReprEq -> CoercibleMsg -> TcSolverReportInfo
ReportCoercibleMsg (CoercibleMsg -> TcSolverReportInfo)
-> Maybe CoercibleMsg -> Maybe TcSolverReportInfo
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> GlobalRdrEnv -> FamInstEnvs -> Type -> Type -> Maybe CoercibleMsg
mkCoercibleExplanation GlobalRdrEnv
rdr_env FamInstEnvs
fam_envs Type
ty1 Type
ty2
       ; String -> SDoc -> TcM ()
traceTc String
"mkEqErr1" (ErrorItem -> SDoc
forall a. Outputable a => a -> SDoc
ppr ErrorItem
item SDoc -> SDoc -> SDoc
$$ CtOrigin -> SDoc
pprCtOrigin (ErrorItem -> CtOrigin
errorItemOrigin ErrorItem
item))
       ; (TcSolverReportMsg
last_msg :| [TcSolverReportMsg]
prev_msgs, [GhcHint]
hints) <- SolverReportErrCtxt
-> ErrorItem -> Type -> Type -> TcM (AccReportMsgs, [GhcHint])
mkEqErr_help SolverReportErrCtxt
ctxt ErrorItem
item Type
ty1 Type
ty2
       ; let
           report :: SolverReport
report = (TcSolverReportMsg -> SolverReport)
-> [TcSolverReportMsg] -> SolverReport
forall m a. Monoid m => (a -> m) -> [a] -> m
forall (t :: * -> *) m a.
(Foldable t, Monoid m) =>
(a -> m) -> t a -> m
foldMap (SolverReportErrCtxt -> TcSolverReportMsg -> SolverReport
important SolverReportErrCtxt
ctxt) ([TcSolverReportMsg] -> [TcSolverReportMsg]
forall a. [a] -> [a]
reverse [TcSolverReportMsg]
prev_msgs)
                  SolverReport -> SolverReport -> SolverReport
forall a. Monoid a => a -> a -> a
`mappend` (SolverReportErrCtxt -> TcSolverReportMsg -> SolverReport
important SolverReportErrCtxt
ctxt (TcSolverReportMsg -> SolverReport)
-> TcSolverReportMsg -> SolverReport
forall a b. (a -> b) -> a -> b
$ TcSolverReportMsg -> [TcSolverReportInfo] -> TcSolverReportMsg
mkTcReportWithInfo TcSolverReportMsg
last_msg ([TcSolverReportInfo] -> TcSolverReportMsg)
-> [TcSolverReportInfo] -> TcSolverReportMsg
forall a b. (a -> b) -> a -> b
$ Maybe TcSolverReportInfo -> [TcSolverReportInfo]
forall a. Maybe a -> [a]
maybeToList Maybe TcSolverReportInfo
mb_coercible_msg)
                  SolverReport -> SolverReport -> SolverReport
forall a. Monoid a => a -> a -> a
`mappend` (RelevantBindings -> SolverReport
mk_relevant_bindings RelevantBindings
binds_msg)
                  SolverReport -> SolverReport -> SolverReport
forall a. Monoid a => a -> a -> a
`mappend` ([GhcHint] -> SolverReport
mk_report_hints [GhcHint]
hints)
       ; SolverReport -> TcM SolverReport
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return SolverReport
report }
  where
    (Type
ty1, Type
ty2) = Type -> (Type, Type)
getEqPredTys (ErrorItem -> Type
errorItemPred ErrorItem
item)
mkCoercibleExplanation :: GlobalRdrEnv -> FamInstEnvs
                       -> TcType -> TcType -> Maybe CoercibleMsg
mkCoercibleExplanation :: GlobalRdrEnv -> FamInstEnvs -> Type -> Type -> Maybe CoercibleMsg
mkCoercibleExplanation GlobalRdrEnv
rdr_env FamInstEnvs
fam_envs Type
ty1 Type
ty2
  | Just (TyCon
tc, [Type]
tys) <- HasCallStack => Type -> Maybe (TyCon, [Type])
Type -> Maybe (TyCon, [Type])
tcSplitTyConApp_maybe Type
ty1
  , (TyCon
rep_tc, [Type]
_, TcCoercionN
_) <- FamInstEnvs -> TyCon -> [Type] -> (TyCon, [Type], TcCoercionN)
tcLookupDataFamInst FamInstEnvs
fam_envs TyCon
tc [Type]
tys
  , Just CoercibleMsg
msg <- TyCon -> Maybe CoercibleMsg
coercible_msg_for_tycon TyCon
rep_tc
  = CoercibleMsg -> Maybe CoercibleMsg
forall a. a -> Maybe a
Just CoercibleMsg
msg
  | Just (TyCon
tc, [Type]
tys) <- (() :: Constraint) => Type -> Maybe (TyCon, [Type])
Type -> Maybe (TyCon, [Type])
splitTyConApp_maybe Type
ty2
  , (TyCon
rep_tc, [Type]
_, TcCoercionN
_) <- FamInstEnvs -> TyCon -> [Type] -> (TyCon, [Type], TcCoercionN)
tcLookupDataFamInst FamInstEnvs
fam_envs TyCon
tc [Type]
tys
  , Just CoercibleMsg
msg <- TyCon -> Maybe CoercibleMsg
coercible_msg_for_tycon TyCon
rep_tc
  = CoercibleMsg -> Maybe CoercibleMsg
forall a. a -> Maybe a
Just CoercibleMsg
msg
  | Just (Type
s1, Type
_) <- Type -> Maybe (Type, Type)
tcSplitAppTy_maybe Type
ty1
  , Just (Type
s2, Type
_) <- Type -> Maybe (Type, Type)
tcSplitAppTy_maybe Type
ty2
  , Type
s1 Type -> Type -> Bool
`eqType` Type
s2
  , Type -> Bool
has_unknown_roles Type
s1
  = CoercibleMsg -> Maybe CoercibleMsg
forall a. a -> Maybe a
Just (CoercibleMsg -> Maybe CoercibleMsg)
-> CoercibleMsg -> Maybe CoercibleMsg
forall a b. (a -> b) -> a -> b
$ Type -> CoercibleMsg
UnknownRoles Type
s1
  | Bool
otherwise
  = Maybe CoercibleMsg
forall a. Maybe a
Nothing
  where
    coercible_msg_for_tycon :: TyCon -> Maybe CoercibleMsg
coercible_msg_for_tycon TyCon
tc
        | TyCon -> Bool
isAbstractTyCon TyCon
tc
        = CoercibleMsg -> Maybe CoercibleMsg
forall a. a -> Maybe a
Just (CoercibleMsg -> Maybe CoercibleMsg)
-> CoercibleMsg -> Maybe CoercibleMsg
forall a b. (a -> b) -> a -> b
$ TyCon -> CoercibleMsg
TyConIsAbstract TyCon
tc
        | TyCon -> Bool
isNewTyCon TyCon
tc
        , [DataCon
data_con] <- TyCon -> [DataCon]
tyConDataCons TyCon
tc
        , let dc_name :: Name
dc_name = DataCon -> Name
dataConName DataCon
data_con
        , Maybe GlobalRdrElt -> Bool
forall a. Maybe a -> Bool
isNothing (GlobalRdrEnv -> Name -> Maybe GlobalRdrElt
lookupGRE_Name GlobalRdrEnv
rdr_env Name
dc_name)
        = CoercibleMsg -> Maybe CoercibleMsg
forall a. a -> Maybe a
Just (CoercibleMsg -> Maybe CoercibleMsg)
-> CoercibleMsg -> Maybe CoercibleMsg
forall a b. (a -> b) -> a -> b
$ TyCon -> DataCon -> CoercibleMsg
OutOfScopeNewtypeConstructor TyCon
tc DataCon
data_con
        | Bool
otherwise = Maybe CoercibleMsg
forall a. Maybe a
Nothing
    has_unknown_roles :: Type -> Bool
has_unknown_roles Type
ty
      | Just (TyCon
tc, [Type]
tys) <- HasCallStack => Type -> Maybe (TyCon, [Type])
Type -> Maybe (TyCon, [Type])
tcSplitTyConApp_maybe Type
ty
      = [Type]
tys [Type] -> Int -> Bool
forall a. [a] -> Int -> Bool
`lengthAtLeast` TyCon -> Int
tyConArity TyCon
tc  
      | Just (Type
s, Type
_) <- Type -> Maybe (Type, Type)
tcSplitAppTy_maybe Type
ty
      = Type -> Bool
has_unknown_roles Type
s
      | Type -> Bool
isTyVarTy Type
ty
      = Bool
True
      | Bool
otherwise
      = Bool
False
type AccReportMsgs = NonEmpty TcSolverReportMsg
mkEqErr_help :: SolverReportErrCtxt
             -> ErrorItem
             -> TcType -> TcType -> TcM (AccReportMsgs, [GhcHint])
mkEqErr_help :: SolverReportErrCtxt
-> ErrorItem -> Type -> Type -> TcM (AccReportMsgs, [GhcHint])
mkEqErr_help SolverReportErrCtxt
ctxt ErrorItem
item Type
ty1 Type
ty2
  | Just (TcId, TcCoercionN)
casted_tv1 <- Type -> Maybe (TcId, TcCoercionN)
tcGetCastedTyVar_maybe Type
ty1
  = SolverReportErrCtxt
-> ErrorItem
-> (TcId, TcCoercionN)
-> Type
-> TcM (AccReportMsgs, [GhcHint])
mkTyVarEqErr SolverReportErrCtxt
ctxt ErrorItem
item (TcId, TcCoercionN)
casted_tv1 Type
ty2
  | Just (TcId, TcCoercionN)
casted_tv2 <- Type -> Maybe (TcId, TcCoercionN)
tcGetCastedTyVar_maybe Type
ty2
  = SolverReportErrCtxt
-> ErrorItem
-> (TcId, TcCoercionN)
-> Type
-> TcM (AccReportMsgs, [GhcHint])
mkTyVarEqErr SolverReportErrCtxt
ctxt ErrorItem
item (TcId, TcCoercionN)
casted_tv2 Type
ty1
  | Bool
otherwise
  = (AccReportMsgs, [GhcHint]) -> TcM (AccReportMsgs, [GhcHint])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (SolverReportErrCtxt
-> ErrorItem -> Type -> Type -> TcSolverReportMsg
reportEqErr SolverReportErrCtxt
ctxt ErrorItem
item Type
ty1 Type
ty2 TcSolverReportMsg -> [TcSolverReportMsg] -> AccReportMsgs
forall a. a -> [a] -> NonEmpty a
:| [], [])
reportEqErr :: SolverReportErrCtxt
            -> ErrorItem
            -> TcType -> TcType -> TcSolverReportMsg
reportEqErr :: SolverReportErrCtxt
-> ErrorItem -> Type -> Type -> TcSolverReportMsg
reportEqErr SolverReportErrCtxt
ctxt ErrorItem
item Type
ty1 Type
ty2
  = TcSolverReportMsg -> [TcSolverReportInfo] -> TcSolverReportMsg
mkTcReportWithInfo TcSolverReportMsg
mismatch [TcSolverReportInfo]
eqInfos
  where
    mismatch :: TcSolverReportMsg
mismatch = Bool
-> SolverReportErrCtxt
-> ErrorItem
-> Type
-> Type
-> TcSolverReportMsg
misMatchOrCND Bool
False SolverReportErrCtxt
ctxt ErrorItem
item Type
ty1 Type
ty2
    eqInfos :: [TcSolverReportInfo]
eqInfos  = Type -> Type -> [TcSolverReportInfo]
eqInfoMsgs Type
ty1 Type
ty2
mkTyVarEqErr :: SolverReportErrCtxt -> ErrorItem
             -> (TcTyVar, TcCoercionN) -> TcType -> TcM (AccReportMsgs, [GhcHint])
mkTyVarEqErr :: SolverReportErrCtxt
-> ErrorItem
-> (TcId, TcCoercionN)
-> Type
-> TcM (AccReportMsgs, [GhcHint])
mkTyVarEqErr SolverReportErrCtxt
ctxt ErrorItem
item (TcId, TcCoercionN)
casted_tv1 Type
ty2
  = do { String -> SDoc -> TcM ()
traceTc String
"mkTyVarEqErr" (ErrorItem -> SDoc
forall a. Outputable a => a -> SDoc
ppr ErrorItem
item SDoc -> SDoc -> SDoc
$$ (TcId, TcCoercionN) -> SDoc
forall a. Outputable a => a -> SDoc
ppr (TcId, TcCoercionN)
casted_tv1 SDoc -> SDoc -> SDoc
$$ Type -> SDoc
forall a. Outputable a => a -> SDoc
ppr Type
ty2)
       ; SolverReportErrCtxt
-> ErrorItem
-> (TcId, TcCoercionN)
-> Type
-> TcM (AccReportMsgs, [GhcHint])
mkTyVarEqErr' SolverReportErrCtxt
ctxt ErrorItem
item (TcId, TcCoercionN)
casted_tv1 Type
ty2 }
mkTyVarEqErr' :: SolverReportErrCtxt -> ErrorItem
              -> (TcTyVar, TcCoercionN) -> TcType -> TcM (AccReportMsgs, [GhcHint])
mkTyVarEqErr' :: SolverReportErrCtxt
-> ErrorItem
-> (TcId, TcCoercionN)
-> Type
-> TcM (AccReportMsgs, [GhcHint])
mkTyVarEqErr' SolverReportErrCtxt
ctxt ErrorItem
item (TcId
tv1, TcCoercionN
co1) Type
ty2
  
  
  | Just FixedRuntimeRepErrorInfo
frr_info <- Maybe FixedRuntimeRepErrorInfo
mb_concrete_reason
  = do
      (TidyEnv
_, [FixedRuntimeRepErrorInfo]
infos) <- TidyEnv
-> [FixedRuntimeRepErrorInfo]
-> TcM (TidyEnv, [FixedRuntimeRepErrorInfo])
zonkTidyFRRInfos (SolverReportErrCtxt -> TidyEnv
cec_tidy SolverReportErrCtxt
ctxt) [FixedRuntimeRepErrorInfo
frr_info]
      (AccReportMsgs, [GhcHint]) -> TcM (AccReportMsgs, [GhcHint])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return ([FixedRuntimeRepErrorInfo] -> TcSolverReportMsg
FixedRuntimeRepError [FixedRuntimeRepErrorInfo]
infos TcSolverReportMsg -> [TcSolverReportMsg] -> AccReportMsgs
forall a. a -> [a] -> NonEmpty a
:| [], [])
  
  
  | CheckTyEqResult
check_eq_result CheckTyEqResult -> CheckTyEqProblem -> Bool
`cterHasProblem` CheckTyEqProblem
cteImpredicative
  = do
    [TcSolverReportInfo]
tyvar_eq_info <- TcId -> Type -> TcM [TcSolverReportInfo]
extraTyVarEqInfo TcId
tv1 Type
ty2
    let
        poly_msg :: TcSolverReportMsg
poly_msg = ErrorItem -> TcId -> Type -> TcSolverReportMsg
CannotUnifyWithPolytype ErrorItem
item TcId
tv1 Type
ty2
        poly_msg_with_info :: TcSolverReportMsg
poly_msg_with_info
          | TcId -> Bool
isSkolemTyVar TcId
tv1
          = TcSolverReportMsg -> [TcSolverReportInfo] -> TcSolverReportMsg
mkTcReportWithInfo TcSolverReportMsg
poly_msg [TcSolverReportInfo]
tyvar_eq_info
          | Bool
otherwise
          = TcSolverReportMsg
poly_msg
        
        
        
    (AccReportMsgs, [GhcHint]) -> TcM (AccReportMsgs, [GhcHint])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (TcSolverReportMsg
poly_msg_with_info TcSolverReportMsg -> AccReportMsgs -> AccReportMsgs
forall a. a -> NonEmpty a -> NonEmpty a
<| TcSolverReportMsg
headline_msg TcSolverReportMsg -> [TcSolverReportMsg] -> AccReportMsgs
forall a. a -> [a] -> NonEmpty a
:| [], [])
  | TcId -> Bool
isSkolemTyVar TcId
tv1  
                       
    Bool -> Bool -> Bool
|| TcId -> Bool
isTyVarTyVar TcId
tv1 Bool -> Bool -> Bool
&& Bool -> Bool
not (Type -> Bool
isTyVarTy Type
ty2)
    Bool -> Bool -> Bool
|| ErrorItem -> EqRel
errorItemEqRel ErrorItem
item EqRel -> EqRel -> Bool
forall a. Eq a => a -> a -> Bool
== EqRel
ReprEq
     
  = do
    [TcSolverReportInfo]
tv_extra     <- TcId -> Type -> TcM [TcSolverReportInfo]
extraTyVarEqInfo TcId
tv1 Type
ty2
    (AccReportMsgs, [GhcHint]) -> TcM (AccReportMsgs, [GhcHint])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (TcSolverReportMsg -> [TcSolverReportInfo] -> TcSolverReportMsg
mkTcReportWithInfo TcSolverReportMsg
headline_msg [TcSolverReportInfo]
tv_extra TcSolverReportMsg -> [TcSolverReportMsg] -> AccReportMsgs
forall a. a -> [a] -> NonEmpty a
:| [], [GhcHint]
add_sig)
  | CheckTyEqResult -> Bool
cterHasOccursCheck CheckTyEqResult
check_eq_result
    
    
    
  = let extras2 :: [TcSolverReportInfo]
extras2 = Type -> Type -> [TcSolverReportInfo]
eqInfoMsgs Type
ty1 Type
ty2
        interesting_tyvars :: [TcId]
interesting_tyvars = (TcId -> Bool) -> [TcId] -> [TcId]
forall a. (a -> Bool) -> [a] -> [a]
filter (Bool -> Bool
not (Bool -> Bool) -> (TcId -> Bool) -> TcId -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Type -> Bool
noFreeVarsOfType (Type -> Bool) -> (TcId -> Type) -> TcId -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. TcId -> Type
tyVarKind) ([TcId] -> [TcId]) -> [TcId] -> [TcId]
forall a b. (a -> b) -> a -> b
$
                             (TcId -> Bool) -> [TcId] -> [TcId]
forall a. (a -> Bool) -> [a] -> [a]
filter TcId -> Bool
isTyVar ([TcId] -> [TcId]) -> [TcId] -> [TcId]
forall a b. (a -> b) -> a -> b
$
                             FV -> [TcId]
fvVarList (FV -> [TcId]) -> FV -> [TcId]
forall a b. (a -> b) -> a -> b
$
                             Type -> FV
tyCoFVsOfType Type
ty1 FV -> FV -> FV
`unionFV` Type -> FV
tyCoFVsOfType Type
ty2
        extras3 :: [TcSolverReportInfo]
extras3 = case [TcId]
interesting_tyvars of
          [] -> []
          (TcId
tv : [TcId]
tvs) -> [NonEmpty TcId -> TcSolverReportInfo
OccursCheckInterestingTyVars (TcId
tv TcId -> [TcId] -> NonEmpty TcId
forall a. a -> [a] -> NonEmpty a
:| [TcId]
tvs)]
    in (AccReportMsgs, [GhcHint]) -> TcM (AccReportMsgs, [GhcHint])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (TcSolverReportMsg -> [TcSolverReportInfo] -> TcSolverReportMsg
mkTcReportWithInfo TcSolverReportMsg
headline_msg ([TcSolverReportInfo]
extras2 [TcSolverReportInfo]
-> [TcSolverReportInfo] -> [TcSolverReportInfo]
forall a. [a] -> [a] -> [a]
++ [TcSolverReportInfo]
extras3) TcSolverReportMsg -> [TcSolverReportMsg] -> AccReportMsgs
forall a. a -> [a] -> NonEmpty a
:| [], [])
    
    
  | TcCoercionN -> Bool
hasCoercionHoleCo TcCoercionN
co1 Bool -> Bool -> Bool
|| Type -> Bool
hasCoercionHoleTy Type
ty2
  = (AccReportMsgs, [GhcHint]) -> TcM (AccReportMsgs, [GhcHint])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (ErrorItem -> TcSolverReportMsg
mkBlockedEqErr ErrorItem
item TcSolverReportMsg -> [TcSolverReportMsg] -> AccReportMsgs
forall a. a -> [a] -> NonEmpty a
:| [], [])
  
  
  
  
  | (Implication
implic:[Implication]
_) <- SolverReportErrCtxt -> [Implication]
cec_encl SolverReportErrCtxt
ctxt
  , Implic { ic_skols :: Implication -> [TcId]
ic_skols = [TcId]
skols } <- Implication
implic
  , TcId
tv1 TcId -> [TcId] -> Bool
forall a. Eq a => a -> [a] -> Bool
forall (t :: * -> *) a. (Foldable t, Eq a) => a -> t a -> Bool
`elem` [TcId]
skols
  = do
    [TcSolverReportInfo]
tv_extra     <- TcId -> Type -> TcM [TcSolverReportInfo]
extraTyVarEqInfo TcId
tv1 Type
ty2
    (AccReportMsgs, [GhcHint]) -> TcM (AccReportMsgs, [GhcHint])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (TcSolverReportMsg -> [TcSolverReportInfo] -> TcSolverReportMsg
mkTcReportWithInfo TcSolverReportMsg
mismatch_msg [TcSolverReportInfo]
tv_extra TcSolverReportMsg -> [TcSolverReportMsg] -> AccReportMsgs
forall a. a -> [a] -> NonEmpty a
:| [], [])
  
  | (Implication
implic:[Implication]
_) <- SolverReportErrCtxt -> [Implication]
cec_encl SolverReportErrCtxt
ctxt   
  , Implic { ic_skols :: Implication -> [TcId]
ic_skols = [TcId]
skols } <- Implication
implic
  , let esc_skols :: [TcId]
esc_skols = (TcId -> Bool) -> [TcId] -> [TcId]
forall a. (a -> Bool) -> [a] -> [a]
filter (TcId -> TyCoVarSet -> Bool
`elemVarSet` (Type -> TyCoVarSet
tyCoVarsOfType Type
ty2)) [TcId]
skols
  , Bool -> Bool
not ([TcId] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [TcId]
esc_skols)
  = (AccReportMsgs, [GhcHint]) -> TcM (AccReportMsgs, [GhcHint])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (ErrorItem -> Implication -> [TcId] -> TcSolverReportMsg
SkolemEscape ErrorItem
item Implication
implic [TcId]
esc_skols TcSolverReportMsg -> [TcSolverReportMsg] -> AccReportMsgs
forall a. a -> [a] -> NonEmpty a
:| [TcSolverReportMsg
mismatch_msg], [])
  
  
  
  
  
  | (Implication
implic:[Implication]
_) <- SolverReportErrCtxt -> [Implication]
cec_encl SolverReportErrCtxt
ctxt   
  , Implic { ic_tclvl :: Implication -> TcLevel
ic_tclvl = TcLevel
lvl } <- Implication
implic
  = Bool
-> SDoc
-> TcM (AccReportMsgs, [GhcHint])
-> TcM (AccReportMsgs, [GhcHint])
forall a. HasCallStack => Bool -> SDoc -> a -> a
assertPpr (Bool -> Bool
not (TcLevel -> TcId -> Bool
isTouchableMetaTyVar TcLevel
lvl TcId
tv1))
              (TcId -> SDoc
forall a. Outputable a => a -> SDoc
ppr TcId
tv1 SDoc -> SDoc -> SDoc
$$ TcLevel -> SDoc
forall a. Outputable a => a -> SDoc
ppr TcLevel
lvl) (TcM (AccReportMsgs, [GhcHint]) -> TcM (AccReportMsgs, [GhcHint]))
-> TcM (AccReportMsgs, [GhcHint]) -> TcM (AccReportMsgs, [GhcHint])
forall a b. (a -> b) -> a -> b
$ do 
    let tclvl_extra :: TcSolverReportMsg
tclvl_extra = TcId -> Implication -> TcSolverReportMsg
UntouchableVariable TcId
tv1 Implication
implic
    [TcSolverReportInfo]
tv_extra     <- TcId -> Type -> TcM [TcSolverReportInfo]
extraTyVarEqInfo TcId
tv1 Type
ty2
    (AccReportMsgs, [GhcHint]) -> TcM (AccReportMsgs, [GhcHint])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (TcSolverReportMsg -> [TcSolverReportInfo] -> TcSolverReportMsg
mkTcReportWithInfo TcSolverReportMsg
tclvl_extra [TcSolverReportInfo]
tv_extra TcSolverReportMsg -> [TcSolverReportMsg] -> AccReportMsgs
forall a. a -> [a] -> NonEmpty a
:| [TcSolverReportMsg
mismatch_msg], [GhcHint]
add_sig)
  | Bool
otherwise
  = (AccReportMsgs, [GhcHint]) -> TcM (AccReportMsgs, [GhcHint])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (SolverReportErrCtxt
-> ErrorItem -> Type -> Type -> TcSolverReportMsg
reportEqErr SolverReportErrCtxt
ctxt ErrorItem
item (TcId -> Type
mkTyVarTy TcId
tv1) Type
ty2 TcSolverReportMsg -> [TcSolverReportMsg] -> AccReportMsgs
forall a. a -> [a] -> NonEmpty a
:| [], [])
        
        
        
  where
    headline_msg :: TcSolverReportMsg
headline_msg = Bool
-> SolverReportErrCtxt
-> ErrorItem
-> Type
-> Type
-> TcSolverReportMsg
misMatchOrCND Bool
insoluble_occurs_check SolverReportErrCtxt
ctxt ErrorItem
item Type
ty1 Type
ty2
    mismatch_msg :: TcSolverReportMsg
mismatch_msg = ErrorItem -> Type -> Type -> TcSolverReportMsg
mkMismatchMsg ErrorItem
item Type
ty1 Type
ty2
    add_sig :: [GhcHint]
add_sig      = Maybe GhcHint -> [GhcHint]
forall a. Maybe a -> [a]
maybeToList (Maybe GhcHint -> [GhcHint]) -> Maybe GhcHint -> [GhcHint]
forall a b. (a -> b) -> a -> b
$ SolverReportErrCtxt -> Type -> Type -> Maybe GhcHint
suggestAddSig SolverReportErrCtxt
ctxt Type
ty1 Type
ty2
    
    
    
    mb_concrete_reason :: Maybe FixedRuntimeRepErrorInfo
mb_concrete_reason
      | Just ConcreteTvOrigin
frr_orig <- TcId -> Maybe ConcreteTvOrigin
isConcreteTyVar_maybe TcId
tv1
      , Bool -> Bool
not (Type -> Bool
isConcrete Type
ty2)
      = FixedRuntimeRepErrorInfo -> Maybe FixedRuntimeRepErrorInfo
forall a. a -> Maybe a
Just (FixedRuntimeRepErrorInfo -> Maybe FixedRuntimeRepErrorInfo)
-> FixedRuntimeRepErrorInfo -> Maybe FixedRuntimeRepErrorInfo
forall a b. (a -> b) -> a -> b
$ ConcreteTvOrigin -> TcId -> Type -> FixedRuntimeRepErrorInfo
frr_reason ConcreteTvOrigin
frr_orig TcId
tv1 Type
ty2
      | Just (TcId
tv2, ConcreteTvOrigin
frr_orig) <- Type -> Maybe (TcId, ConcreteTvOrigin)
isConcreteTyVarTy_maybe Type
ty2
      , Bool -> Bool
not (TcId -> Bool
isConcreteTyVar TcId
tv1)
      = FixedRuntimeRepErrorInfo -> Maybe FixedRuntimeRepErrorInfo
forall a. a -> Maybe a
Just (FixedRuntimeRepErrorInfo -> Maybe FixedRuntimeRepErrorInfo)
-> FixedRuntimeRepErrorInfo -> Maybe FixedRuntimeRepErrorInfo
forall a b. (a -> b) -> a -> b
$ ConcreteTvOrigin -> TcId -> Type -> FixedRuntimeRepErrorInfo
frr_reason ConcreteTvOrigin
frr_orig TcId
tv2 Type
ty1
      
      
      
      | Bool
otherwise
      = Maybe FixedRuntimeRepErrorInfo
forall a. Maybe a
Nothing
    frr_reason :: ConcreteTvOrigin -> TcId -> Type -> FixedRuntimeRepErrorInfo
frr_reason (ConcreteFRR FixedRuntimeRepOrigin
frr_orig) TcId
conc_tv Type
not_conc
      = FRR_Info { frr_info_origin :: FixedRuntimeRepOrigin
frr_info_origin = FixedRuntimeRepOrigin
frr_orig
                 , frr_info_not_concrete :: Maybe (TcId, Type)
frr_info_not_concrete = (TcId, Type) -> Maybe (TcId, Type)
forall a. a -> Maybe a
Just (TcId
conc_tv, Type
not_conc) }
    ty1 :: Type
ty1 = TcId -> Type
mkTyVarTy TcId
tv1
    check_eq_result :: CheckTyEqResult
check_eq_result = case ErrorItem -> Maybe CtIrredReason
ei_m_reason ErrorItem
item of
      Just (NonCanonicalReason CheckTyEqResult
result) -> CheckTyEqResult
result
      Maybe CtIrredReason
_ -> TcId -> Type -> CheckTyEqResult
checkTyVarEq TcId
tv1 Type
ty2
        
        
        
    insoluble_occurs_check :: Bool
insoluble_occurs_check = CheckTyEqResult
check_eq_result CheckTyEqResult -> CheckTyEqProblem -> Bool
`cterHasProblem` CheckTyEqProblem
cteInsolubleOccurs
eqInfoMsgs :: TcType -> TcType -> [TcSolverReportInfo]
eqInfoMsgs :: Type -> Type -> [TcSolverReportInfo]
eqInfoMsgs Type
ty1 Type
ty2
  = [Maybe TcSolverReportInfo] -> [TcSolverReportInfo]
forall a. [Maybe a] -> [a]
catMaybes [Maybe TcSolverReportInfo
tyfun_msg, Maybe TcSolverReportInfo
ambig_msg]
  where
    mb_fun1 :: Maybe TyCon
mb_fun1 = Type -> Maybe TyCon
isTyFun_maybe Type
ty1
    mb_fun2 :: Maybe TyCon
mb_fun2 = Type -> Maybe TyCon
isTyFun_maybe Type
ty2
      
      
    ambig_tkvs1 :: ([TcId], [TcId])
ambig_tkvs1 = ([TcId], [TcId])
-> (TyCon -> ([TcId], [TcId])) -> Maybe TyCon -> ([TcId], [TcId])
forall b a. b -> (a -> b) -> Maybe a -> b
maybe ([TcId], [TcId])
forall a. Monoid a => a
mempty (\TyCon
_ -> Type -> ([TcId], [TcId])
ambigTkvsOfTy Type
ty1) Maybe TyCon
mb_fun1
    ambig_tkvs2 :: ([TcId], [TcId])
ambig_tkvs2 = ([TcId], [TcId])
-> (TyCon -> ([TcId], [TcId])) -> Maybe TyCon -> ([TcId], [TcId])
forall b a. b -> (a -> b) -> Maybe a -> b
maybe ([TcId], [TcId])
forall a. Monoid a => a
mempty (\TyCon
_ -> Type -> ([TcId], [TcId])
ambigTkvsOfTy Type
ty2) Maybe TyCon
mb_fun2
    ambig_tkvs :: ([TcId], [TcId])
ambig_tkvs@([TcId]
ambig_kvs, [TcId]
ambig_tvs) = ([TcId], [TcId])
ambig_tkvs1 ([TcId], [TcId]) -> ([TcId], [TcId]) -> ([TcId], [TcId])
forall a. Semigroup a => a -> a -> a
S.<> ([TcId], [TcId])
ambig_tkvs2
    ambig_msg :: Maybe TcSolverReportInfo
ambig_msg | Maybe TyCon -> Bool
forall a. Maybe a -> Bool
isJust Maybe TyCon
mb_fun1 Bool -> Bool -> Bool
|| Maybe TyCon -> Bool
forall a. Maybe a -> Bool
isJust Maybe TyCon
mb_fun2
              , Bool -> Bool
not ([TcId] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [TcId]
ambig_kvs Bool -> Bool -> Bool
&& [TcId] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [TcId]
ambig_tvs)
              = TcSolverReportInfo -> Maybe TcSolverReportInfo
forall a. a -> Maybe a
Just (TcSolverReportInfo -> Maybe TcSolverReportInfo)
-> TcSolverReportInfo -> Maybe TcSolverReportInfo
forall a b. (a -> b) -> a -> b
$ Bool -> ([TcId], [TcId]) -> TcSolverReportInfo
Ambiguity Bool
False ([TcId], [TcId])
ambig_tkvs
              | Bool
otherwise
              = Maybe TcSolverReportInfo
forall a. Maybe a
Nothing
    tyfun_msg :: Maybe TcSolverReportInfo
tyfun_msg | Just TyCon
tc1 <- Maybe TyCon
mb_fun1
              , Just TyCon
tc2 <- Maybe TyCon
mb_fun2
              , TyCon
tc1 TyCon -> TyCon -> Bool
forall a. Eq a => a -> a -> Bool
== TyCon
tc2
              , Bool -> Bool
not (TyCon -> Role -> Bool
isInjectiveTyCon TyCon
tc1 Role
Nominal)
              = TcSolverReportInfo -> Maybe TcSolverReportInfo
forall a. a -> Maybe a
Just (TcSolverReportInfo -> Maybe TcSolverReportInfo)
-> TcSolverReportInfo -> Maybe TcSolverReportInfo
forall a b. (a -> b) -> a -> b
$ TyCon -> TcSolverReportInfo
NonInjectiveTyFam TyCon
tc1
              | Bool
otherwise
              = Maybe TcSolverReportInfo
forall a. Maybe a
Nothing
misMatchOrCND :: Bool -> SolverReportErrCtxt -> ErrorItem
              -> TcType -> TcType -> TcSolverReportMsg
misMatchOrCND :: Bool
-> SolverReportErrCtxt
-> ErrorItem
-> Type
-> Type
-> TcSolverReportMsg
misMatchOrCND Bool
insoluble_occurs_check SolverReportErrCtxt
ctxt ErrorItem
item Type
ty1 Type
ty2
  | Bool
insoluble_occurs_check  
    Bool -> Bool -> Bool
|| (Type -> Bool
isRigidTy Type
ty1 Bool -> Bool -> Bool
&& Type -> Bool
isRigidTy Type
ty2)
    Bool -> Bool -> Bool
|| (ErrorItem -> CtFlavour
ei_flavour ErrorItem
item CtFlavour -> CtFlavour -> Bool
forall a. Eq a => a -> a -> Bool
== CtFlavour
Given)
    Bool -> Bool -> Bool
|| [Implication] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [Implication]
givens
  = 
    
    ErrorItem -> Type -> Type -> TcSolverReportMsg
mkMismatchMsg ErrorItem
item Type
ty1 Type
ty2
  | Bool
otherwise
  = [Implication]
-> NonEmpty ErrorItem -> Maybe CND_Extra -> TcSolverReportMsg
CouldNotDeduce [Implication]
givens (ErrorItem
item ErrorItem -> [ErrorItem] -> NonEmpty ErrorItem
forall a. a -> [a] -> NonEmpty a
:| []) (CND_Extra -> Maybe CND_Extra
forall a. a -> Maybe a
Just (CND_Extra -> Maybe CND_Extra) -> CND_Extra -> Maybe CND_Extra
forall a b. (a -> b) -> a -> b
$ TypeOrKind -> Type -> Type -> CND_Extra
CND_Extra TypeOrKind
level Type
ty1 Type
ty2)
  where
    level :: TypeOrKind
level   = CtLoc -> Maybe TypeOrKind
ctLocTypeOrKind_maybe (ErrorItem -> CtLoc
errorItemCtLoc ErrorItem
item) Maybe TypeOrKind -> TypeOrKind -> TypeOrKind
forall a. Maybe a -> a -> a
`orElse` TypeOrKind
TypeLevel
    givens :: [Implication]
givens  = [ Implication
given | Implication
given <- SolverReportErrCtxt -> [Implication]
getUserGivens SolverReportErrCtxt
ctxt, Implication -> HasGivenEqs
ic_given_eqs Implication
given HasGivenEqs -> HasGivenEqs -> Bool
forall a. Eq a => a -> a -> Bool
/= HasGivenEqs
NoGivenEqs ]
              
              
mkBlockedEqErr :: ErrorItem -> TcSolverReportMsg
mkBlockedEqErr :: ErrorItem -> TcSolverReportMsg
mkBlockedEqErr ErrorItem
item = ErrorItem -> TcSolverReportMsg
BlockedEquality ErrorItem
item
extraTyVarEqInfo :: TcTyVar -> TcType -> TcM [TcSolverReportInfo]
 TcId
tv1 Type
ty2
  = (:) (TcSolverReportInfo
 -> [TcSolverReportInfo] -> [TcSolverReportInfo])
-> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo
-> IOEnv
     (Env TcGblEnv TcLclEnv)
     ([TcSolverReportInfo] -> [TcSolverReportInfo])
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> TcId -> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo
extraTyVarInfo TcId
tv1 IOEnv
  (Env TcGblEnv TcLclEnv)
  ([TcSolverReportInfo] -> [TcSolverReportInfo])
-> TcM [TcSolverReportInfo] -> TcM [TcSolverReportInfo]
forall a b.
IOEnv (Env TcGblEnv TcLclEnv) (a -> b)
-> IOEnv (Env TcGblEnv TcLclEnv) a
-> IOEnv (Env TcGblEnv TcLclEnv) b
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> Type -> TcM [TcSolverReportInfo]
ty_extra Type
ty2
  where
    ty_extra :: Type -> TcM [TcSolverReportInfo]
ty_extra Type
ty = case Type -> Maybe (TcId, TcCoercionN)
tcGetCastedTyVar_maybe Type
ty of
                    Just (TcId
tv, TcCoercionN
_) -> (TcSolverReportInfo -> [TcSolverReportInfo] -> [TcSolverReportInfo]
forall a. a -> [a] -> [a]
:[]) (TcSolverReportInfo -> [TcSolverReportInfo])
-> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo
-> TcM [TcSolverReportInfo]
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> TcId -> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo
extraTyVarInfo TcId
tv
                    Maybe (TcId, TcCoercionN)
Nothing      -> [TcSolverReportInfo] -> TcM [TcSolverReportInfo]
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return []
extraTyVarInfo :: TcTyVar -> TcM TcSolverReportInfo
 TcId
tv = Bool
-> SDoc
-> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo
-> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo
forall a. HasCallStack => Bool -> SDoc -> a -> a
assertPpr (TcId -> Bool
isTyVar TcId
tv) (TcId -> SDoc
forall a. Outputable a => a -> SDoc
ppr TcId
tv) (IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo
 -> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo)
-> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo
-> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo
forall a b. (a -> b) -> a -> b
$
  case TcId -> TcTyVarDetails
tcTyVarDetails TcId
tv of
    SkolemTv SkolemInfo
skol_info TcLevel
lvl Bool
overlaps -> do
      SkolemInfo
new_skol_info <- SkolemInfo -> TcM SkolemInfo
zonkSkolemInfo SkolemInfo
skol_info
      TcSolverReportInfo
-> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (TcSolverReportInfo
 -> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo)
-> TcSolverReportInfo
-> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo
forall a b. (a -> b) -> a -> b
$ TcId -> TcSolverReportInfo
TyVarInfo (Name -> Type -> TcTyVarDetails -> TcId
mkTcTyVar (TcId -> Name
tyVarName TcId
tv) (TcId -> Type
tyVarKind TcId
tv) (SkolemInfo -> TcLevel -> Bool -> TcTyVarDetails
SkolemTv SkolemInfo
new_skol_info TcLevel
lvl Bool
overlaps))
    TcTyVarDetails
_ -> TcSolverReportInfo
-> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (TcSolverReportInfo
 -> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo)
-> TcSolverReportInfo
-> IOEnv (Env TcGblEnv TcLclEnv) TcSolverReportInfo
forall a b. (a -> b) -> a -> b
$ TcId -> TcSolverReportInfo
TyVarInfo TcId
tv
suggestAddSig :: SolverReportErrCtxt -> TcType -> TcType -> Maybe GhcHint
suggestAddSig :: SolverReportErrCtxt -> Type -> Type -> Maybe GhcHint
suggestAddSig SolverReportErrCtxt
ctxt Type
ty1 Type
_ty2
  | Name
bndr : [Name]
bndrs <- [Name]
inferred_bndrs
  = GhcHint -> Maybe GhcHint
forall a. a -> Maybe a
Just (GhcHint -> Maybe GhcHint) -> GhcHint -> Maybe GhcHint
forall a b. (a -> b) -> a -> b
$ AvailableBindings -> GhcHint
SuggestAddTypeSignatures (AvailableBindings -> GhcHint) -> AvailableBindings -> GhcHint
forall a b. (a -> b) -> a -> b
$ NonEmpty Name -> AvailableBindings
NamedBindings (Name
bndr Name -> [Name] -> NonEmpty Name
forall a. a -> [a] -> NonEmpty a
:| [Name]
bndrs)
  | Bool
otherwise
  = Maybe GhcHint
forall a. Maybe a
Nothing
  where
    inferred_bndrs :: [Name]
inferred_bndrs =
      case Type -> Maybe TcId
tcGetTyVar_maybe Type
ty1 of
        Just TcId
tv | TcId -> Bool
isSkolemTyVar TcId
tv -> [Implication] -> Bool -> TcId -> [Name]
find (SolverReportErrCtxt -> [Implication]
cec_encl SolverReportErrCtxt
ctxt) Bool
False TcId
tv
        Maybe TcId
_                          -> []
    
    
    
    find :: [Implication] -> Bool -> TcId -> [Name]
find [] Bool
_ TcId
_ = []
    find (Implication
implic:[Implication]
implics) Bool
seen_eqs TcId
tv
       | TcId
tv TcId -> [TcId] -> Bool
forall a. Eq a => a -> [a] -> Bool
forall (t :: * -> *) a. (Foldable t, Eq a) => a -> t a -> Bool
`elem` Implication -> [TcId]
ic_skols Implication
implic
       , InferSkol [(Name, Type)]
prs <- Implication -> SkolemInfoAnon
ic_info Implication
implic
       , Bool
seen_eqs
       = ((Name, Type) -> Name) -> [(Name, Type)] -> [Name]
forall a b. (a -> b) -> [a] -> [b]
map (Name, Type) -> Name
forall a b. (a, b) -> a
fst [(Name, Type)]
prs
       | Bool
otherwise
       = [Implication] -> Bool -> TcId -> [Name]
find [Implication]
implics (Bool
seen_eqs Bool -> Bool -> Bool
|| Implication -> HasGivenEqs
ic_given_eqs Implication
implic HasGivenEqs -> HasGivenEqs -> Bool
forall a. Eq a => a -> a -> Bool
/= HasGivenEqs
NoGivenEqs) TcId
tv
mkMismatchMsg :: ErrorItem -> Type -> Type -> TcSolverReportMsg
mkMismatchMsg :: ErrorItem -> Type -> Type -> TcSolverReportMsg
mkMismatchMsg ErrorItem
item Type
ty1 Type
ty2 =
  case CtOrigin
orig of
    TypeEqOrigin { Type
uo_actual :: Type
uo_actual :: CtOrigin -> Type
uo_actual, Type
uo_expected :: Type
uo_expected :: CtOrigin -> Type
uo_expected, uo_thing :: CtOrigin -> Maybe TypedThing
uo_thing = Maybe TypedThing
mb_thing } ->
      TcSolverReportMsg -> [TcSolverReportInfo] -> TcSolverReportMsg
mkTcReportWithInfo
        (TypeEqMismatch
          { teq_mismatch_ppr_explicit_kinds :: Bool
teq_mismatch_ppr_explicit_kinds = Bool
ppr_explicit_kinds
          , teq_mismatch_item :: ErrorItem
teq_mismatch_item = ErrorItem
item
          , teq_mismatch_ty1 :: Type
teq_mismatch_ty1  = Type
ty1
          , teq_mismatch_ty2 :: Type
teq_mismatch_ty2  = Type
ty2
          , teq_mismatch_actual :: Type
teq_mismatch_actual   = Type
uo_actual
          , teq_mismatch_expected :: Type
teq_mismatch_expected = Type
uo_expected
          , teq_mismatch_what :: Maybe TypedThing
teq_mismatch_what     = Maybe TypedThing
mb_thing})
        [TcSolverReportInfo]
extras
    KindEqOrigin Type
cty1 Type
cty2 CtOrigin
sub_o Maybe TypeOrKind
mb_sub_t_or_k ->
      TcSolverReportMsg -> [TcSolverReportInfo] -> TcSolverReportMsg
mkTcReportWithInfo (Bool -> ErrorItem -> Type -> Type -> TcSolverReportMsg
Mismatch Bool
False ErrorItem
item Type
ty1 Type
ty2)
        (Type -> Type -> CtOrigin -> Maybe TypeOrKind -> TcSolverReportInfo
WhenMatching Type
cty1 Type
cty2 CtOrigin
sub_o Maybe TypeOrKind
mb_sub_t_or_k TcSolverReportInfo -> [TcSolverReportInfo] -> [TcSolverReportInfo]
forall a. a -> [a] -> [a]
: [TcSolverReportInfo]
extras)
    CtOrigin
_ ->
      TcSolverReportMsg -> [TcSolverReportInfo] -> TcSolverReportMsg
mkTcReportWithInfo
        (Bool -> ErrorItem -> Type -> Type -> TcSolverReportMsg
Mismatch Bool
False ErrorItem
item Type
ty1 Type
ty2)
        [TcSolverReportInfo]
extras
  where
    orig :: CtOrigin
orig = ErrorItem -> CtOrigin
errorItemOrigin ErrorItem
item
    extras :: [TcSolverReportInfo]
extras = Type -> Type -> [TcSolverReportInfo]
sameOccExtras Type
ty2 Type
ty1
    ppr_explicit_kinds :: Bool
ppr_explicit_kinds = Type -> Type -> CtOrigin -> Bool
shouldPprWithExplicitKinds Type
ty1 Type
ty2 CtOrigin
orig
shouldPprWithExplicitKinds :: Type -> Type -> CtOrigin -> Bool
shouldPprWithExplicitKinds :: Type -> Type -> CtOrigin -> Bool
shouldPprWithExplicitKinds Type
_ty1 Type
_ty2 (TypeEqOrigin { uo_actual :: CtOrigin -> Type
uo_actual = Type
act
                                                   , uo_expected :: CtOrigin -> Type
uo_expected = Type
exp
                                                   , uo_visible :: CtOrigin -> Bool
uo_visible = Bool
vis })
  | Bool -> Bool
not Bool
vis   = Bool
True                  
  | Bool
otherwise = Type -> Type -> Bool
tcEqTypeVis Type
act Type
exp   
shouldPprWithExplicitKinds Type
ty1 Type
ty2 CtOrigin
_ct
  = Type -> Type -> Bool
tcEqTypeVis Type
ty1 Type
ty2
sameOccExtras :: TcType -> TcType -> [TcSolverReportInfo]
 Type
ty1 Type
ty2
  | Just (TyCon
tc1, [Type]
_) <- HasCallStack => Type -> Maybe (TyCon, [Type])
Type -> Maybe (TyCon, [Type])
tcSplitTyConApp_maybe Type
ty1
  , Just (TyCon
tc2, [Type]
_) <- HasCallStack => Type -> Maybe (TyCon, [Type])
Type -> Maybe (TyCon, [Type])
tcSplitTyConApp_maybe Type
ty2
  , let n1 :: Name
n1 = TyCon -> Name
tyConName TyCon
tc1
        n2 :: Name
n2 = TyCon -> Name
tyConName TyCon
tc2
        same_occ :: Bool
same_occ = Name -> OccName
nameOccName Name
n1                   OccName -> OccName -> Bool
forall a. Eq a => a -> a -> Bool
== Name -> OccName
nameOccName Name
n2
        same_pkg :: Bool
same_pkg = Module -> Unit
forall unit. GenModule unit -> unit
moduleUnit ((() :: Constraint) => Name -> Module
Name -> Module
nameModule Name
n1) Unit -> Unit -> Bool
forall a. Eq a => a -> a -> Bool
== Module -> Unit
forall unit. GenModule unit -> unit
moduleUnit ((() :: Constraint) => Name -> Module
Name -> Module
nameModule Name
n2)
  , Name
n1 Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
/= Name
n2   
  , Bool
same_occ   
  = [Bool -> Name -> Name -> TcSolverReportInfo
SameOcc Bool
same_pkg Name
n1 Name
n2]
  | Bool
otherwise
  = []
mkDictErr :: HasDebugCallStack => SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkDictErr :: (() :: Constraint) =>
SolverReportErrCtxt -> [ErrorItem] -> TcM SolverReport
mkDictErr SolverReportErrCtxt
ctxt [ErrorItem]
orig_items
  = Bool -> TcM SolverReport -> TcM SolverReport
forall a. HasCallStack => Bool -> a -> a
assert (Bool -> Bool
not ([ErrorItem] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [ErrorItem]
items)) (TcM SolverReport -> TcM SolverReport)
-> TcM SolverReport -> TcM SolverReport
forall a b. (a -> b) -> a -> b
$
    do { InstEnvs
inst_envs <- TcM InstEnvs
tcGetInstEnvs
       ; let min_items :: [ErrorItem]
min_items = [ErrorItem] -> [ErrorItem]
elim_superclasses [ErrorItem]
items
             lookups :: [(ErrorItem, ClsInstLookupResult)]
lookups = (ErrorItem -> (ErrorItem, ClsInstLookupResult))
-> [ErrorItem] -> [(ErrorItem, ClsInstLookupResult)]
forall a b. (a -> b) -> [a] -> [b]
map (InstEnvs -> ErrorItem -> (ErrorItem, ClsInstLookupResult)
lookup_cls_inst InstEnvs
inst_envs) [ErrorItem]
min_items
             ([(ErrorItem, ClsInstLookupResult)]
no_inst_items, [(ErrorItem, ClsInstLookupResult)]
overlap_items) = ((ErrorItem, ClsInstLookupResult) -> Bool)
-> [(ErrorItem, ClsInstLookupResult)]
-> ([(ErrorItem, ClsInstLookupResult)],
    [(ErrorItem, ClsInstLookupResult)])
forall a. (a -> Bool) -> [a] -> ([a], [a])
partition (ErrorItem, ClsInstLookupResult) -> Bool
is_no_inst [(ErrorItem, ClsInstLookupResult)]
lookups
       
       
       
       
       
       ; TcSolverReportMsg
err <- HasCallStack =>
SolverReportErrCtxt
-> (ErrorItem, ClsInstLookupResult) -> TcM TcSolverReportMsg
SolverReportErrCtxt
-> (ErrorItem, ClsInstLookupResult) -> TcM TcSolverReportMsg
mk_dict_err SolverReportErrCtxt
ctxt ([(ErrorItem, ClsInstLookupResult)]
-> (ErrorItem, ClsInstLookupResult)
forall a. HasCallStack => [a] -> a
head ([(ErrorItem, ClsInstLookupResult)]
no_inst_items [(ErrorItem, ClsInstLookupResult)]
-> [(ErrorItem, ClsInstLookupResult)]
-> [(ErrorItem, ClsInstLookupResult)]
forall a. [a] -> [a] -> [a]
++ [(ErrorItem, ClsInstLookupResult)]
overlap_items))
       ; SolverReport -> TcM SolverReport
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (SolverReport -> TcM SolverReport)
-> SolverReport -> TcM SolverReport
forall a b. (a -> b) -> a -> b
$ SolverReportErrCtxt -> TcSolverReportMsg -> SolverReport
important SolverReportErrCtxt
ctxt TcSolverReportMsg
err }
  where
    filtered_items :: [ErrorItem]
filtered_items = (ErrorItem -> Bool) -> [ErrorItem] -> [ErrorItem]
forall a. (a -> Bool) -> [a] -> [a]
filter (Bool -> Bool
not (Bool -> Bool) -> (ErrorItem -> Bool) -> ErrorItem -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ErrorItem -> Bool
ei_suppress) [ErrorItem]
orig_items
    items :: [ErrorItem]
items | [ErrorItem] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [ErrorItem]
filtered_items = [ErrorItem]
orig_items  
                                              
          | Bool
otherwise           = [ErrorItem]
filtered_items  
    no_givens :: Bool
no_givens = [Implication] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null (SolverReportErrCtxt -> [Implication]
getUserGivens SolverReportErrCtxt
ctxt)
    is_no_inst :: (ErrorItem, ClsInstLookupResult) -> Bool
is_no_inst (ErrorItem
item, ([InstMatch]
matches, PotentialUnifiers
unifiers, [InstMatch]
_))
      =  Bool
no_givens
      Bool -> Bool -> Bool
&& [InstMatch] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [InstMatch]
matches
      Bool -> Bool -> Bool
&& (PotentialUnifiers -> Bool
nullUnifiers PotentialUnifiers
unifiers Bool -> Bool -> Bool
|| (TcId -> Bool) -> [TcId] -> Bool
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
all (Bool -> Bool
not (Bool -> Bool) -> (TcId -> Bool) -> TcId -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. TcId -> Bool
isAmbiguousTyVar) (Type -> [TcId]
tyCoVarsOfTypeList (ErrorItem -> Type
errorItemPred ErrorItem
item)))
    lookup_cls_inst :: InstEnvs -> ErrorItem -> (ErrorItem, ClsInstLookupResult)
lookup_cls_inst InstEnvs
inst_envs ErrorItem
item
      = (ErrorItem
item, Bool -> InstEnvs -> Class -> [Type] -> ClsInstLookupResult
lookupInstEnv Bool
True InstEnvs
inst_envs Class
clas [Type]
tys)
      where
        (Class
clas, [Type]
tys) = (() :: Constraint) => Type -> (Class, [Type])
Type -> (Class, [Type])
getClassPredTys (ErrorItem -> Type
errorItemPred ErrorItem
item)
    
    
    
    elim_superclasses :: [ErrorItem] -> [ErrorItem]
elim_superclasses [ErrorItem]
items = (ErrorItem -> Type) -> [ErrorItem] -> [ErrorItem]
forall a. (a -> Type) -> [a] -> [a]
mkMinimalBySCs ErrorItem -> Type
errorItemPred [ErrorItem]
items
mk_dict_err :: HasCallStack => SolverReportErrCtxt -> (ErrorItem, ClsInstLookupResult)
            -> TcM TcSolverReportMsg
mk_dict_err :: HasCallStack =>
SolverReportErrCtxt
-> (ErrorItem, ClsInstLookupResult) -> TcM TcSolverReportMsg
mk_dict_err SolverReportErrCtxt
ctxt (ErrorItem
item, ([InstMatch]
matches, PotentialUnifiers
unifiers, [InstMatch]
unsafe_overlapped))
  | [InstMatch] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [InstMatch]
matches  
  = do { (SolverReportErrCtxt
_, RelevantBindings
rel_binds, ErrorItem
item) <- Bool
-> SolverReportErrCtxt
-> ErrorItem
-> TcM (SolverReportErrCtxt, RelevantBindings, ErrorItem)
relevantBindings Bool
True SolverReportErrCtxt
ctxt ErrorItem
item
       ; [ClsInst]
candidate_insts <- TcM [ClsInst]
get_candidate_instances
       ; ([ImportError]
imp_errs, [GhcHint]
field_suggestions) <- TcM ([ImportError], [GhcHint])
record_field_suggestions
       ; TcSolverReportMsg -> TcM TcSolverReportMsg
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (ErrorItem
-> [ClsInst]
-> RelevantBindings
-> [ImportError]
-> [GhcHint]
-> TcSolverReportMsg
cannot_resolve_msg ErrorItem
item [ClsInst]
candidate_insts RelevantBindings
rel_binds [ImportError]
imp_errs [GhcHint]
field_suggestions) }
  | [InstMatch] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [InstMatch]
unsafe_overlapped   
  = TcSolverReportMsg -> TcM TcSolverReportMsg
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (TcSolverReportMsg -> TcM TcSolverReportMsg)
-> TcSolverReportMsg -> TcM TcSolverReportMsg
forall a b. (a -> b) -> a -> b
$ TcSolverReportMsg
overlap_msg
  | Bool
otherwise
  = TcSolverReportMsg -> TcM TcSolverReportMsg
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (TcSolverReportMsg -> TcM TcSolverReportMsg)
-> TcSolverReportMsg -> TcM TcSolverReportMsg
forall a b. (a -> b) -> a -> b
$ TcSolverReportMsg
safe_haskell_msg
  where
    orig :: CtOrigin
orig          = ErrorItem -> CtOrigin
errorItemOrigin ErrorItem
item
    pred :: Type
pred          = ErrorItem -> Type
errorItemPred ErrorItem
item
    (Class
clas, [Type]
tys)   = (() :: Constraint) => Type -> (Class, [Type])
Type -> (Class, [Type])
getClassPredTys Type
pred
    ispecs :: [ClsInst]
ispecs        = [ClsInst
ispec | (ClsInst
ispec, [Maybe Type]
_) <- [InstMatch]
matches]
    unsafe_ispecs :: [ClsInst]
unsafe_ispecs = [ClsInst
ispec | (ClsInst
ispec, [Maybe Type]
_) <- [InstMatch]
unsafe_overlapped]
    get_candidate_instances :: TcM [ClsInst]
    
    get_candidate_instances :: TcM [ClsInst]
get_candidate_instances
      | [Type
ty] <- [Type]
tys   
      = do { InstEnvs
instEnvs <- TcM InstEnvs
tcGetInstEnvs
           ; [ClsInst] -> TcM [ClsInst]
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return ((ClsInst -> Bool) -> [ClsInst] -> [ClsInst]
forall a. (a -> Bool) -> [a] -> [a]
filter (Type -> ClsInst -> Bool
is_candidate_inst Type
ty)
                            (InstEnvs -> Class -> [ClsInst]
classInstances InstEnvs
instEnvs Class
clas)) }
      | Bool
otherwise = [ClsInst] -> TcM [ClsInst]
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return []
    is_candidate_inst :: Type -> ClsInst -> Bool
is_candidate_inst Type
ty ClsInst
inst 
      | [Type
other_ty] <- ClsInst -> [Type]
is_tys ClsInst
inst
      , Just (TyCon
tc1, [Type]
_) <- HasCallStack => Type -> Maybe (TyCon, [Type])
Type -> Maybe (TyCon, [Type])
tcSplitTyConApp_maybe Type
ty
      , Just (TyCon
tc2, [Type]
_) <- HasCallStack => Type -> Maybe (TyCon, [Type])
Type -> Maybe (TyCon, [Type])
tcSplitTyConApp_maybe Type
other_ty
      = let n1 :: Name
n1 = TyCon -> Name
tyConName TyCon
tc1
            n2 :: Name
n2 = TyCon -> Name
tyConName TyCon
tc2
            different_names :: Bool
different_names = Name
n1 Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
/= Name
n2
            same_occ_names :: Bool
same_occ_names = Name -> OccName
nameOccName Name
n1 OccName -> OccName -> Bool
forall a. Eq a => a -> a -> Bool
== Name -> OccName
nameOccName Name
n2
        in Bool
different_names Bool -> Bool -> Bool
&& Bool
same_occ_names
      | Bool
otherwise = Bool
False
    
    record_field_suggestions :: TcM ([ImportError], [GhcHint])
    record_field_suggestions :: TcM ([ImportError], [GhcHint])
record_field_suggestions = ((OccName -> TcM ([ImportError], [GhcHint]))
 -> Maybe OccName -> TcM ([ImportError], [GhcHint]))
-> Maybe OccName
-> (OccName -> TcM ([ImportError], [GhcHint]))
-> TcM ([ImportError], [GhcHint])
forall a b c. (a -> b -> c) -> b -> a -> c
flip (TcM ([ImportError], [GhcHint])
-> (OccName -> TcM ([ImportError], [GhcHint]))
-> Maybe OccName
-> TcM ([ImportError], [GhcHint])
forall b a. b -> (a -> b) -> Maybe a -> b
maybe (TcM ([ImportError], [GhcHint])
 -> (OccName -> TcM ([ImportError], [GhcHint]))
 -> Maybe OccName
 -> TcM ([ImportError], [GhcHint]))
-> TcM ([ImportError], [GhcHint])
-> (OccName -> TcM ([ImportError], [GhcHint]))
-> Maybe OccName
-> TcM ([ImportError], [GhcHint])
forall a b. (a -> b) -> a -> b
$ ([ImportError], [GhcHint]) -> TcM ([ImportError], [GhcHint])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return ([], [GhcHint]
noHints)) Maybe OccName
record_field ((OccName -> TcM ([ImportError], [GhcHint]))
 -> TcM ([ImportError], [GhcHint]))
-> (OccName -> TcM ([ImportError], [GhcHint]))
-> TcM ([ImportError], [GhcHint])
forall a b. (a -> b) -> a -> b
$ \OccName
name ->
       do { GlobalRdrEnv
glb_env <- TcRn GlobalRdrEnv
getGlobalRdrEnv
          ; LocalRdrEnv
lcl_env <- RnM LocalRdrEnv
getLocalRdrEnv
          ; if GlobalRdrEnv -> LocalRdrEnv -> OccName -> Bool
occ_name_in_scope GlobalRdrEnv
glb_env LocalRdrEnv
lcl_env OccName
name
            then ([ImportError], [GhcHint]) -> TcM ([ImportError], [GhcHint])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return ([], [GhcHint]
noHints)
            else do { DynFlags
dflags   <- IOEnv (Env TcGblEnv TcLclEnv) DynFlags
forall (m :: * -> *). HasDynFlags m => m DynFlags
getDynFlags
                    ; ImportAvails
imp_info <- TcRn ImportAvails
getImports
                    ; Module
curr_mod <- IOEnv (Env TcGblEnv TcLclEnv) Module
forall (m :: * -> *). HasModule m => m Module
getModule
                    ; HomePackageTable
hpt      <- TcRnIf TcGblEnv TcLclEnv HomePackageTable
forall gbl lcl. TcRnIf gbl lcl HomePackageTable
getHpt
                    ; ([ImportError], [GhcHint]) -> TcM ([ImportError], [GhcHint])
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (WhatLooking
-> DynFlags
-> HomePackageTable
-> Module
-> GlobalRdrEnv
-> LocalRdrEnv
-> ImportAvails
-> RdrName
-> ([ImportError], [GhcHint])
unknownNameSuggestions WhatLooking
WL_RecField DynFlags
dflags HomePackageTable
hpt Module
curr_mod
                        GlobalRdrEnv
glb_env LocalRdrEnv
emptyLocalRdrEnv ImportAvails
imp_info (OccName -> RdrName
mkRdrUnqual OccName
name)) } }
    occ_name_in_scope :: GlobalRdrEnv -> LocalRdrEnv -> OccName -> Bool
occ_name_in_scope GlobalRdrEnv
glb_env LocalRdrEnv
lcl_env OccName
occ_name = Bool -> Bool
not (Bool -> Bool) -> Bool -> Bool
forall a b. (a -> b) -> a -> b
$
      [GlobalRdrElt] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null (GlobalRdrEnv -> OccName -> [GlobalRdrElt]
lookupGlobalRdrEnv GlobalRdrEnv
glb_env OccName
occ_name) Bool -> Bool -> Bool
&&
      Maybe Name -> Bool
forall a. Maybe a -> Bool
isNothing (LocalRdrEnv -> OccName -> Maybe Name
lookupLocalRdrOcc LocalRdrEnv
lcl_env OccName
occ_name)
    record_field :: Maybe OccName
record_field = case CtOrigin
orig of
      HasFieldOrigin FastString
name -> OccName -> Maybe OccName
forall a. a -> Maybe a
Just (FastString -> OccName
mkVarOccFS FastString
name)
      CtOrigin
_                   -> Maybe OccName
forall a. Maybe a
Nothing
    cannot_resolve_msg :: ErrorItem -> [ClsInst] -> RelevantBindings
                       -> [ImportError] -> [GhcHint] -> TcSolverReportMsg
    cannot_resolve_msg :: ErrorItem
-> [ClsInst]
-> RelevantBindings
-> [ImportError]
-> [GhcHint]
-> TcSolverReportMsg
cannot_resolve_msg ErrorItem
item [ClsInst]
candidate_insts RelevantBindings
binds [ImportError]
imp_errs [GhcHint]
field_suggestions
      = ErrorItem
-> [ClsInst]
-> [ClsInst]
-> [ImportError]
-> [GhcHint]
-> RelevantBindings
-> TcSolverReportMsg
CannotResolveInstance ErrorItem
item (PotentialUnifiers -> [ClsInst]
getPotentialUnifiers PotentialUnifiers
unifiers) [ClsInst]
candidate_insts [ImportError]
imp_errs [GhcHint]
field_suggestions RelevantBindings
binds
    
    overlap_msg, safe_haskell_msg :: TcSolverReportMsg
    
    overlap_msg :: TcSolverReportMsg
overlap_msg
      = Bool -> TcSolverReportMsg -> TcSolverReportMsg
forall a. HasCallStack => Bool -> a -> a
assert (Bool -> Bool
not ([InstMatch] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [InstMatch]
matches)) (TcSolverReportMsg -> TcSolverReportMsg)
-> TcSolverReportMsg -> TcSolverReportMsg
forall a b. (a -> b) -> a -> b
$ ErrorItem -> [ClsInst] -> [ClsInst] -> TcSolverReportMsg
OverlappingInstances ErrorItem
item [ClsInst]
ispecs (PotentialUnifiers -> [ClsInst]
getPotentialUnifiers PotentialUnifiers
unifiers)
    
    
    safe_haskell_msg :: TcSolverReportMsg
safe_haskell_msg
     = Bool -> TcSolverReportMsg -> TcSolverReportMsg
forall a. HasCallStack => Bool -> a -> a
assert ([InstMatch]
matches [InstMatch] -> Int -> Bool
forall a. [a] -> Int -> Bool
`lengthIs` Int
1 Bool -> Bool -> Bool
&& Bool -> Bool
not ([ClsInst] -> Bool
forall a. [a] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [ClsInst]
unsafe_ispecs)) (TcSolverReportMsg -> TcSolverReportMsg)
-> TcSolverReportMsg -> TcSolverReportMsg
forall a b. (a -> b) -> a -> b
$
       ErrorItem -> [ClsInst] -> [ClsInst] -> TcSolverReportMsg
UnsafeOverlap ErrorItem
item [ClsInst]
ispecs [ClsInst]
unsafe_ispecs
relevantBindings :: Bool  
                          
                 -> SolverReportErrCtxt -> ErrorItem
                 -> TcM (SolverReportErrCtxt, RelevantBindings, ErrorItem)
relevantBindings :: Bool
-> SolverReportErrCtxt
-> ErrorItem
-> TcM (SolverReportErrCtxt, RelevantBindings, ErrorItem)
relevantBindings Bool
want_filtering SolverReportErrCtxt
ctxt ErrorItem
item
  = do { String -> SDoc -> TcM ()
traceTc String
"relevantBindings" (ErrorItem -> SDoc
forall a. Outputable a => a -> SDoc
ppr ErrorItem
item)
       ; (TidyEnv
env1, CtOrigin
tidy_orig) <- TidyEnv -> CtOrigin -> TcM (TidyEnv, CtOrigin)
zonkTidyOrigin (SolverReportErrCtxt -> TidyEnv
cec_tidy SolverReportErrCtxt
ctxt) (CtLoc -> CtOrigin
ctLocOrigin CtLoc
loc)
             
             
       ; let extra_tvs :: TyCoVarSet
extra_tvs = case CtOrigin
tidy_orig of
                             KindEqOrigin Type
t1 Type
t2 CtOrigin
_ Maybe TypeOrKind
_ -> [Type] -> TyCoVarSet
tyCoVarsOfTypes [Type
t1,Type
t2]
                             CtOrigin
_                      -> TyCoVarSet
emptyVarSet
             ct_fvs :: TyCoVarSet
ct_fvs = Type -> TyCoVarSet
tyCoVarsOfType (ErrorItem -> Type
errorItemPred ErrorItem
item) TyCoVarSet -> TyCoVarSet -> TyCoVarSet
`unionVarSet` TyCoVarSet
extra_tvs
             
             loc' :: CtLoc
loc'   = CtLoc -> CtOrigin -> CtLoc
setCtLocOrigin CtLoc
loc CtOrigin
tidy_orig
             item' :: ErrorItem
item'  = ErrorItem
item { ei_loc :: CtLoc
ei_loc = CtLoc
loc' }
       ; (TidyEnv
env2, NameEnv Type
lcl_name_cache) <- TidyEnv -> [TcLclEnv] -> TcM (TidyEnv, NameEnv Type)
zonkTidyTcLclEnvs TidyEnv
env1 [TcLclEnv
lcl_env]
       ; RelevantBindings
relev_bds <- Bool
-> TcLclEnv -> NameEnv Type -> TyCoVarSet -> TcM RelevantBindings
relevant_bindings Bool
want_filtering TcLclEnv
lcl_env NameEnv Type
lcl_name_cache TyCoVarSet
ct_fvs
       ; let ctxt' :: SolverReportErrCtxt
ctxt'  = SolverReportErrCtxt
ctxt { cec_tidy :: TidyEnv
cec_tidy = TidyEnv
env2 }
       ; (SolverReportErrCtxt, RelevantBindings, ErrorItem)
-> TcM (SolverReportErrCtxt, RelevantBindings, ErrorItem)
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (SolverReportErrCtxt
ctxt', RelevantBindings
relev_bds, ErrorItem
item') }
  where
    loc :: CtLoc
loc     = ErrorItem -> CtLoc
errorItemCtLoc ErrorItem
item
    lcl_env :: TcLclEnv
lcl_env = CtLoc -> TcLclEnv
ctLocEnv CtLoc
loc
relevant_bindings :: Bool
                  -> TcLclEnv
                  -> NameEnv Type 
                  -> TyCoVarSet
                  -> TcM RelevantBindings
relevant_bindings :: Bool
-> TcLclEnv -> NameEnv Type -> TyCoVarSet -> TcM RelevantBindings
relevant_bindings Bool
want_filtering TcLclEnv
lcl_env NameEnv Type
lcl_name_env TyCoVarSet
ct_tvs
  = do { DynFlags
dflags <- IOEnv (Env TcGblEnv TcLclEnv) DynFlags
forall (m :: * -> *). HasDynFlags m => m DynFlags
getDynFlags
       ; String -> SDoc -> TcM ()
traceTc String
"relevant_bindings" (SDoc -> TcM ()) -> SDoc -> TcM ()
forall a b. (a -> b) -> a -> b
$
           [SDoc] -> SDoc
vcat [ TyCoVarSet -> SDoc
forall a. Outputable a => a -> SDoc
ppr TyCoVarSet
ct_tvs
                , (SDoc -> SDoc) -> [SDoc] -> SDoc
forall a. (a -> SDoc) -> [a] -> SDoc
pprWithCommas SDoc -> SDoc
forall a. a -> a
id [ TcId -> SDoc
forall a. Outputable a => a -> SDoc
ppr TcId
id SDoc -> SDoc -> SDoc
<+> SDoc
dcolon SDoc -> SDoc -> SDoc
<+> Type -> SDoc
forall a. Outputable a => a -> SDoc
ppr (TcId -> Type
idType TcId
id)
                                   | TcIdBndr TcId
id TopLevelFlag
_ <- TcLclEnv -> [TcBinder]
tcl_bndrs TcLclEnv
lcl_env ]
                , (SDoc -> SDoc) -> [SDoc] -> SDoc
forall a. (a -> SDoc) -> [a] -> SDoc
pprWithCommas SDoc -> SDoc
forall a. a -> a
id
                    [ Name -> SDoc
forall a. Outputable a => a -> SDoc
ppr Name
id | TcIdBndr_ExpType Name
id ExpType
_ TopLevelFlag
_ <- TcLclEnv -> [TcBinder]
tcl_bndrs TcLclEnv
lcl_env ] ]
       ; DynFlags
-> Maybe Int
-> TyCoVarSet
-> RelevantBindings
-> [TcBinder]
-> TcM RelevantBindings
go DynFlags
dflags (DynFlags -> Maybe Int
maxRelevantBinds DynFlags
dflags)
                    TyCoVarSet
emptyVarSet ([(Name, Type)] -> Bool -> RelevantBindings
RelevantBindings [] Bool
False)
                    ([TcBinder] -> [TcBinder]
forall a. HasOccName a => [a] -> [a]
removeBindingShadowing ([TcBinder] -> [TcBinder]) -> [TcBinder] -> [TcBinder]
forall a b. (a -> b) -> a -> b
$ TcLclEnv -> [TcBinder]
tcl_bndrs TcLclEnv
lcl_env)
         
         
  }
  where
    run_out :: Maybe Int -> Bool
    run_out :: Maybe Int -> Bool
run_out Maybe Int
Nothing = Bool
False
    run_out (Just Int
n) = Int
n Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
<= Int
0
    dec_max :: Maybe Int -> Maybe Int
    dec_max :: Maybe Int -> Maybe Int
dec_max = (Int -> Int) -> Maybe Int -> Maybe Int
forall a b. (a -> b) -> Maybe a -> Maybe b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (\Int
n -> Int
n Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
1)
    go :: DynFlags -> Maybe Int -> TcTyVarSet
       -> RelevantBindings
       -> [TcBinder]
       -> TcM RelevantBindings
    go :: DynFlags
-> Maybe Int
-> TyCoVarSet
-> RelevantBindings
-> [TcBinder]
-> TcM RelevantBindings
go DynFlags
_ Maybe Int
_ TyCoVarSet
_ (RelevantBindings [(Name, Type)]
bds Bool
discards) []
      = RelevantBindings -> TcM RelevantBindings
forall a. a -> IOEnv (Env TcGblEnv TcLclEnv) a
forall (m :: * -> *) a. Monad m => a -> m a
return (RelevantBindings -> TcM RelevantBindings)
-> RelevantBindings -> TcM RelevantBindings
forall a b. (a -> b) -> a -> b
$ [(Name, Type)] -> Bool -> RelevantBindings
RelevantBindings ([(Name, Type)] -> [(Name, Type)]
forall a. [a] -> [a]
reverse [(Name, Type)]
bds) Bool
discards
    go DynFlags
dflags Maybe Int
n_left TyCoVarSet
tvs_seen rels :: RelevantBindings
rels@(RelevantBindings [(Name, Type)]
bds Bool
discards) (TcBinder
tc_bndr : [TcBinder]
tc_bndrs)
      = case TcBinder
tc_bndr of
          TcTvBndr {} -> TcM RelevantBindings
discard_it
          TcIdBndr TcId
id TopLevelFlag
top_lvl -> Name -> TopLevelFlag -> TcM RelevantBindings
go2 (TcId -> Name
idName TcId
id) TopLevelFlag
top_lvl
          TcIdBndr_ExpType Name
name ExpType
et TopLevelFlag
top_lvl ->
            do { Maybe Type
mb_ty <- ExpType -> TcM (Maybe Type)
readExpType_maybe ExpType
et
                   
                   
                   
                   
                   
               ; case Maybe Type
mb_ty of
                   Just Type
_ty -> Name -> TopLevelFlag -> TcM RelevantBindings
go2 Name
name TopLevelFlag
top_lvl
                   Maybe Type
Nothing -> TcM RelevantBindings
discard_it  
               }
      where
        discard_it :: TcM RelevantBindings
discard_it = DynFlags
-> Maybe Int
-> TyCoVarSet
-> RelevantBindings
-> [TcBinder]
-> TcM RelevantBindings
go DynFlags
dflags Maybe Int
n_left TyCoVarSet
tvs_seen RelevantBindings
rels [TcBinder]
tc_bndrs
        go2 :: Name -> TopLevelFlag -> TcM RelevantBindings
go2 Name
id_name TopLevelFlag
top_lvl
          = do { let tidy_ty :: Type
tidy_ty = case NameEnv Type -> Name -> Maybe Type
forall a. NameEnv a -> Name -> Maybe a
lookupNameEnv NameEnv Type
lcl_name_env Name
id_name of
                                  Just Type
tty -> Type
tty
                                  Maybe Type
Nothing -> String -> SDoc -> Type
forall a. HasCallStack => String -> SDoc -> a
pprPanic String
"relevant_bindings" (Name -> SDoc
forall a. Outputable a => a -> SDoc
ppr Name
id_name)
               ; String -> SDoc -> TcM ()
traceTc String
"relevantBindings 1" (Name -> SDoc
forall a. Outputable a => a -> SDoc
ppr Name
id_name SDoc -> SDoc -> SDoc
<+> SDoc
dcolon SDoc -> SDoc -> SDoc
<+> Type -> SDoc
forall a. Outputable a => a -> SDoc
ppr Type
tidy_ty)
               ; let id_tvs :: TyCoVarSet
id_tvs = Type -> TyCoVarSet
tyCoVarsOfType Type
tidy_ty
                     bd :: (Name, Type)
bd = (Name
id_name, Type
tidy_ty)
                     new_seen :: TyCoVarSet
new_seen = TyCoVarSet
tvs_seen TyCoVarSet -> TyCoVarSet -> TyCoVarSet
`unionVarSet` TyCoVarSet
id_tvs
               ; if (Bool
want_filtering Bool -> Bool -> Bool
&& Bool -> Bool
not (DynFlags -> Bool
hasPprDebug DynFlags
dflags)
                                    Bool -> Bool -> Bool
&& TyCoVarSet
id_tvs TyCoVarSet -> TyCoVarSet -> Bool
`disjointVarSet` TyCoVarSet
ct_tvs)
                          
                          
                 then TcM RelevantBindings
discard_it
                 else if TopLevelFlag -> Bool
isTopLevel TopLevelFlag
top_lvl Bool -> Bool -> Bool
&& Bool -> Bool
not (Maybe Int -> Bool
forall a. Maybe a -> Bool
isNothing Maybe Int
n_left)
                          
                          
                 then TcM RelevantBindings
discard_it
                 else if Maybe Int -> Bool
run_out Maybe Int
n_left Bool -> Bool -> Bool
&& TyCoVarSet
id_tvs TyCoVarSet -> TyCoVarSet -> Bool
`subVarSet` TyCoVarSet
tvs_seen
                          
                          
                 then DynFlags
-> Maybe Int
-> TyCoVarSet
-> RelevantBindings
-> [TcBinder]
-> TcM RelevantBindings
go DynFlags
dflags Maybe Int
n_left TyCoVarSet
tvs_seen ([(Name, Type)] -> Bool -> RelevantBindings
RelevantBindings [(Name, Type)]
bds Bool
True) 
                         [TcBinder]
tc_bndrs
                          
                 else DynFlags
-> Maybe Int
-> TyCoVarSet
-> RelevantBindings
-> [TcBinder]
-> TcM RelevantBindings
go DynFlags
dflags (Maybe Int -> Maybe Int
dec_max Maybe Int
n_left) TyCoVarSet
new_seen
                         ([(Name, Type)] -> Bool -> RelevantBindings
RelevantBindings ((Name, Type)
bd(Name, Type) -> [(Name, Type)] -> [(Name, Type)]
forall a. a -> [a] -> [a]
:[(Name, Type)]
bds) Bool
discards) [TcBinder]
tc_bndrs }
warnDefaulting :: TcTyVar -> [Ct] -> Type -> TcM ()
warnDefaulting :: TcId -> [Ct] -> Type -> TcM ()
warnDefaulting TcId
_ [] Type
_
  = String -> TcM ()
forall a. String -> a
panic String
"warnDefaulting: empty Wanteds"
warnDefaulting TcId
the_tv wanteds :: [Ct]
wanteds@(Ct
ct:[Ct]
_) Type
default_ty
  = do { Bool
warn_default <- WarningFlag -> TcRnIf TcGblEnv TcLclEnv Bool
forall gbl lcl. WarningFlag -> TcRnIf gbl lcl Bool
woptM WarningFlag
Opt_WarnTypeDefaults
       ; TidyEnv
env0 <- TcM TidyEnv
tcInitTidyEnv
            
            
       ; let filtered :: [Ct]
filtered = (Ct -> Bool) -> [Ct] -> [Ct]
forall a. (a -> Bool) -> [a] -> [a]
filter (Bool -> Bool
not (Bool -> Bool) -> (Ct -> Bool) -> Ct -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. CtOrigin -> Bool
isWantedSuperclassOrigin (CtOrigin -> Bool) -> (Ct -> CtOrigin) -> Ct -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Ct -> CtOrigin
ctOrigin) [Ct]
wanteds
             tidy_env :: TidyEnv
tidy_env = TidyEnv -> [TcId] -> TidyEnv
tidyFreeTyCoVars TidyEnv
env0 ([TcId] -> TidyEnv) -> [TcId] -> TidyEnv
forall a b. (a -> b) -> a -> b
$
                        Cts -> [TcId]
tyCoVarsOfCtsList ([Ct] -> Cts
forall a. [a] -> Bag a
listToBag [Ct]
filtered)
             tidy_wanteds :: [Ct]
tidy_wanteds = (Ct -> Ct) -> [Ct] -> [Ct]
forall a b. (a -> b) -> [a] -> [b]
map (TidyEnv -> Ct -> Ct
tidyCt TidyEnv
tidy_env) [Ct]
filtered
             tidy_tv :: Maybe TcId
tidy_tv = UniqFM TcId TcId -> TcId -> Maybe TcId
forall a. VarEnv a -> TcId -> Maybe a
lookupVarEnv (TidyEnv -> UniqFM TcId TcId
forall a b. (a, b) -> b
snd TidyEnv
tidy_env) TcId
the_tv
             diag :: TcRnMessage
diag = [Ct] -> Maybe TcId -> Type -> TcRnMessage
TcRnWarnDefaulting [Ct]
tidy_wanteds Maybe TcId
tidy_tv Type
default_ty
             loc :: CtLoc
loc = Ct -> CtLoc
ctLoc Ct
ct
       ; CtLoc -> TcM () -> TcM ()
forall a. CtLoc -> TcM a -> TcM a
setCtLocM CtLoc
loc (TcM () -> TcM ()) -> TcM () -> TcM ()
forall a b. (a -> b) -> a -> b
$ Bool -> TcRnMessage -> TcM ()
diagnosticTc Bool
warn_default TcRnMessage
diag }
solverReportMsg_ExpectedActuals :: TcSolverReportMsg -> [(Type, Type)]
solverReportMsg_ExpectedActuals :: TcSolverReportMsg -> [(Type, Type)]
solverReportMsg_ExpectedActuals
  = \case
    TcReportWithInfo TcSolverReportMsg
msg NonEmpty TcSolverReportInfo
infos ->
      TcSolverReportMsg -> [(Type, Type)]
solverReportMsg_ExpectedActuals TcSolverReportMsg
msg
      [(Type, Type)] -> [(Type, Type)] -> [(Type, Type)]
forall a. [a] -> [a] -> [a]
++ (TcSolverReportInfo -> [(Type, Type)]
solverReportInfo_ExpectedActuals (TcSolverReportInfo -> [(Type, Type)])
-> [TcSolverReportInfo] -> [(Type, Type)]
forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<< NonEmpty TcSolverReportInfo -> [TcSolverReportInfo]
forall a. NonEmpty a -> [a]
forall (t :: * -> *) a. Foldable t => t a -> [a]
toList NonEmpty TcSolverReportInfo
infos)
    Mismatch { mismatch_ty1 :: TcSolverReportMsg -> Type
mismatch_ty1 = Type
exp, mismatch_ty2 :: TcSolverReportMsg -> Type
mismatch_ty2 = Type
act } ->
      [(Type
exp, Type
act)]
    KindMismatch { kmismatch_expected :: TcSolverReportMsg -> Type
kmismatch_expected = Type
exp, kmismatch_actual :: TcSolverReportMsg -> Type
kmismatch_actual = Type
act } ->
      [(Type
exp, Type
act)]
    TypeEqMismatch { teq_mismatch_expected :: TcSolverReportMsg -> Type
teq_mismatch_expected = Type
exp, teq_mismatch_actual :: TcSolverReportMsg -> Type
teq_mismatch_actual = Type
act } ->
      [(Type
exp,Type
act)]
    TcSolverReportMsg
_ -> []
solverReportInfo_ExpectedActuals :: TcSolverReportInfo -> [(Type, Type)]
solverReportInfo_ExpectedActuals :: TcSolverReportInfo -> [(Type, Type)]
solverReportInfo_ExpectedActuals
  = \case
    ExpectedActual { ea_expected :: TcSolverReportInfo -> Type
ea_expected = Type
exp, ea_actual :: TcSolverReportInfo -> Type
ea_actual = Type
act } ->
      [(Type
exp, Type
act)]
    ExpectedActualAfterTySynExpansion
      { ea_expanded_expected :: TcSolverReportInfo -> Type
ea_expanded_expected = Type
exp, ea_expanded_actual :: TcSolverReportInfo -> Type
ea_expanded_actual = Type
act } ->
      [(Type
exp, Type
act)]
    TcSolverReportInfo
_ -> []