module TcMonad(
TcType,
TcTauType, TcPredType, TcThetaType, TcRhoType,
- TcTyVar, TcTyVarSet,
+ TcTyVar, TcTyVarSet, TcClassContext,
TcKind,
TcM, NF_TcM, TcDown, TcEnv,
listNF_Tc, mapAndUnzipNF_Tc, mapBagNF_Tc,
checkTc, checkTcM, checkMaybeTc, checkMaybeTcM,
- failTc, failWithTc, addErrTc, addErrsTc, warnTc, recoverTc, checkNoErrsTc, recoverNF_Tc, discardErrsTc,
+ failTc, failWithTc, addErrTc, addErrsTc, warnTc,
+ recoverTc, checkNoErrsTc, recoverNF_Tc, discardErrsTc,
addErrTcM, addInstErrTcM, failWithTcM,
tcGetEnv, tcSetEnv,
tcGetDefaultTys, tcSetDefaultTys,
- tcGetUnique, tcGetUniques, tcGetDFunUniq,
+ tcGetUnique, tcGetUniques,
+ doptsTc, getDOptsTc,
tcAddSrcLoc, tcGetSrcLoc, tcGetInstLoc,
tcAddErrCtxtM, tcSetErrCtxtM,
import Type ( Type, Kind, PredType, ThetaType, RhoType, TauType,
)
import ErrUtils ( addShortErrLocLine, addShortWarnLocLine, ErrMsg, Message, WarnMsg )
-import CmdLineOpts ( opt_PprStyle_Debug )
import Bag ( Bag, emptyBag, isEmptyBag,
foldBag, unitBag, unionBags, snocBag )
-import Class ( Class )
+import Class ( Class, ClassContext )
import Name ( Name )
import Var ( Id, TyVar, newMutTyVar, newSigTyVar, readMutTyVar, writeMutTyVar )
import VarEnv ( TidyEnv, emptyTidyEnv )
import VarSet ( TyVarSet )
-import UniqSupply ( UniqSupply, uniqFromSupply, uniqsFromSupply, splitUniqSupply,
+import UniqSupply ( UniqSupply, uniqFromSupply, uniqsFromSupply,
+ splitUniqSupply, mkSplitUniqSupply,
UniqSM, initUs_ )
import SrcLoc ( SrcLoc, noSrcLoc )
-import FiniteMap ( FiniteMap, lookupFM, addToFM, emptyFM )
-import UniqFM ( UniqFM, emptyUFM )
+import UniqFM ( emptyUFM )
import Unique ( Unique )
-import BasicTypes ( Unused )
+import CmdLineOpts
import Outputable
-import FastString ( FastString )
import IOExts ( IORef, newIORef, readIORef, writeIORef,
unsafeInterleaveIO, fixIO
-- a cannot occur inside a MutTyVar in T; that is,
-- T is "flattened" before quantifying over a
-type TcPredType = PredType
-type TcThetaType = ThetaType
-type TcRhoType = RhoType
-type TcTauType = TauType
-type TcKind = TcType
+type TcClassContext = ClassContext
+type TcPredType = PredType
+type TcThetaType = ThetaType
+type TcRhoType = RhoType
+type TcTauType = TauType
+type TcKind = TcType
\end{code}
\begin{code}
type NF_TcM r = TcDown -> TcEnv -> IO r -- Can't raise UserError
type TcM r = TcDown -> TcEnv -> IO r -- Can raise UserError
- -- ToDo: nuke the 's' part
- -- The difference between the two is
- -- now for documentation purposes only
type Either_TcM r = TcDown -> TcEnv -> IO r -- Either NF_TcM or TcM
-- Used only in this file for type signatures which
\end{code}
\begin{code}
-initTc :: TcEnv
- -> SrcLoc
+
+initTc :: DynFlags
+ -> TcEnv
-> TcM r
- -> IO (Maybe r, (Bag ErrMsg, Bag WarnMsg))
+ -> IO (Maybe r, (Bag WarnMsg, Bag ErrMsg))
-initTc tc_env src_loc do_this
+initTc dflags tc_env do_this
= do {
us <- mkSplitUniqSupply 'a' ;
us_var <- newIORef us ;
- dfun_var <- newIORef emptyFM ;
errs_var <- newIORef (emptyBag,emptyBag) ;
tvs_var <- newIORef emptyUFM ;
let
- init_down = TcDown [] us_var dfun_var
- src_loc
- [] errs_var
+ init_down = TcDown { tc_dflags = dflags, tc_def = [],
+ tc_us = us_var, tc_loc = noSrcLoc,
+ tc_ctxt = [], tc_errs = errs_var }
;
- maybe_res <- catch (do { res <- do_this init_down env ;
+ maybe_res <- catch (do { res <- do_this init_down tc_env ;
return (Just res)})
(\_ -> return Nothing) ;
\begin{code}
forkNF_Tc :: NF_TcM r -> NF_TcM r
-forkNF_Tc m (TcDown deflts u_var df_var src_loc err_cxt err_var) env
+forkNF_Tc m down@(TcDown { tc_us = u_var }) env
= do
-- Get a fresh unique supply
us <- readIORef u_var
unsafeInterleaveIO (do {
us_var' <- newIORef us2 ;
err_var' <- newIORef (emptyBag,emptyBag) ;
- tv_var' <- newIORef emptyUFM ;
- let { down' = TcDown deflts us_var' df_var src_loc err_cxt err_var' } ;
+ let { down' = down { tc_us = us_var', tc_errs = err_var' } };
m down' env
-- ToDo: optionally dump any error messages
})
\begin{code}
traceTc :: SDoc -> NF_TcM ()
-traceTc doc down env = printErrs doc
+traceTc doc down env = printDump doc
ioToTc :: IO a -> NF_TcM a
ioToTc io down env = io
addErrsTc :: [Message] -> NF_TcM ()
addErrsTc [] = returnNF_Tc ()
-addErrsTc err_msgs = listNF_Tc_ (map addErrTc err_msgs) `thenNF_Tc_` returnNF_Tc ()
+addErrsTc err_msgs = listNF_Tc (map addErrTc err_msgs) `thenNF_Tc_` returnNF_Tc ()
-- The 'M' variants do the TidyEnv bit
failWithTcM :: (TidyEnv, Message) -> TcM a -- Add an error message and fail
\end{code}
-\begin{code}
-tcGetDFunUniq :: String -> NF_TcM Int
-tcGetDFunUniq key down env
- = do dfun_supply <- readIORef d_var
- let uniq = case lookupFM dfun_supply key of
- Just x -> x+1
- Nothing -> 0
- let dfun_supply' = addToFM dfun_supply key uniq
- writeIORef d_var dfun_supply'
- return uniq
- where
- d_var = getDFunSupplyVar down
-\end{code}
-
%************************************************************************
%* *
\begin{code}
data TcDown
- = TcDown
- [Type] -- Types used for defaulting
-
- (TcRef UniqSupply) -- Unique supply
- (TcRef DFunNameSupply) -- Name supply for dictionary function names
-
- SrcLoc -- Source location
- ErrCtxt -- Error context
- (TcRef (Bag WarnMsg, Bag ErrMsg))
+ = TcDown {
+ tc_dflags :: DynFlags,
+ tc_def :: [Type], -- Types used for defaulting
+ tc_us :: (TcRef UniqSupply), -- Unique supply
+ tc_loc :: SrcLoc, -- Source location
+ tc_ctxt :: ErrCtxt, -- Error context
+ tc_errs :: (TcRef (Bag WarnMsg, Bag ErrMsg))
+ }
type ErrCtxt = [TidyEnv -> NF_TcM (TidyEnv, Message)]
-- Innermost first. Monadic so that we have a chance
-- to deal with bound type variables just before error
-- message construction
-
-type DFunNameSupply = FiniteMap String Int
- -- This is used as a name supply for dictionary functions
- -- From the inst decl we derive a string, usually by glomming together
- -- the class and tycon name -- but it doesn't matter exactly how;
- -- this map then gives a unique int for each inst decl with that
- -- string. (In Haskell 98 there can only be one,
- -- but not so in more extended versions; also class CC type T
- -- and class C type TT might both give the string CCT
- --
- -- We could just use one Int for all the instance decls, but this
- -- way the uniques change less when you add an instance decl,
- -- hence less recompilation
\end{code}
-- These selectors are *local* to TcMonad.lhs
\begin{code}
-getTcErrs (TcDown def us ds loc ctxt errs) = errs
-setTcErrs (TcDown def us ds loc ctxt _ ) errs = TcDown def us ds loc ctxt errs
+getTcErrs (TcDown{tc_errs=errs}) = errs
+setTcErrs down errs = down{tc_errs=errs}
+
+getDefaultTys (TcDown{tc_def=def}) = def
+setDefaultTys down def = down{tc_def=def}
-getDefaultTys (TcDown def us ds loc ctxt errs) = def
-setDefaultTys (TcDown _ us ds loc ctxt errs) def = TcDown def us ds loc ctxt errs
+getLoc (TcDown{tc_loc=loc}) = loc
+setLoc down loc = down{tc_loc=loc}
-getLoc (TcDown def us ds loc ctxt errs) = loc
-setLoc (TcDown def us ds _ ctxt errs) loc = TcDown def us ds loc ctxt errs
+getUniqSupplyVar (TcDown{tc_us=us}) = us
-getUniqSupplyVar (TcDown def us ds loc ctxt errs) = us
-getDFunSupplyVar (TcDown def us ds loc ctxt errs) = ds
+getErrCtxt (TcDown{tc_ctxt=ctxt}) = ctxt
+setErrCtxt down msg = down{tc_ctxt=[msg]}
+addErrCtxt down msg = down{tc_ctxt = msg : tc_ctxt down}
-setErrCtxt (TcDown def us ds loc ctxt errs) msg = TcDown def us ds loc [msg] errs
-addErrCtxt (TcDown def us ds loc ctxt errs) msg = TcDown def us ds loc (msg:ctxt) errs
-getErrCtxt (TcDown def us ds loc ctxt errs) = ctxt
+doptsTc :: DynFlag -> TcM Bool
+doptsTc dflag (TcDown{tc_dflags=dflags}) env_down
+ = return (dopt dflag dflags)
+
+getDOptsTc :: TcM DynFlags
+getDOptsTc (TcDown{tc_dflags=dflags}) env_down
+ = return dflags
\end{code}
data InstOrigin
= OccurrenceOf Id -- Occurrence of an overloaded identifier
+ | IPOcc Name -- Occurrence of an implicit parameter
+ | IPBind Name -- Binding site of an implicit parameter
+
| RecordUpdOrigin
| DataDeclOrigin -- Typechecking a data declaration
where
pp_orig (OccurrenceOf id)
= hsep [ptext SLIT("use of"), quotes (ppr id)]
+ pp_orig (IPOcc name)
+ = hsep [ptext SLIT("use of implicit parameter"), quotes (char '?' <> ppr name)]
+ pp_orig (IPBind name)
+ = hsep [ptext SLIT("binding for implicit parameter"), quotes (char '?' <> ppr name)]
pp_orig (LiteralOrigin lit)
= hsep [ptext SLIT("the literal"), quotes (ppr lit)]
pp_orig (PatOrigin pat)
projects / ghc-hetmet.git / blobdiff