module TcIfaceSig ( tcInterfaceSigs ) where
-import Ubiq
+IMP_Ubiq()
-import TcMonad hiding ( rnMtoTcM )
-import TcMonoType ( tcPolyType )
+import TcMonad
+import TcMonoType ( tcHsType, tcHsTypeKind )
+import TcEnv ( tcLookupGlobalValue, tcExtendTyVarEnv, tcExtendGlobalValEnv,
+ tcLookupTyConByKey, tcLookupGlobalValueMaybe, tcLookupLocalValue
+ )
+import TcKind ( TcKind, kindToTcKind )
-import HsSyn ( Sig(..), PolyType )
-import RnHsSyn ( RenamedSig(..), RnName(..) )
+import HsSyn ( IfaceSig(..), HsDecl(..), TyDecl, ClassDecl, InstDecl, DefaultDecl, HsBinds,
+ Fake, InPat, HsType )
+import RnHsSyn ( RenamedHsDecl(..) )
+import HsCore
+import HsDecls ( HsIdInfo(..) )
+import Literal ( Literal(..) )
+import CoreSyn
+import CoreUnfold
+import MagicUFs ( MagicUnfoldingFun )
+import WwLib ( mkWrapper )
+import SpecEnv ( SpecEnv )
+import PrimOp ( PrimOp(..) )
-import CmdLineOpts ( opt_CompilingPrelude )
-import Id ( mkImported )
---import Name ( Name(..) )
+import Id ( GenId, mkImported, mkUserId, isPrimitiveId_maybe )
+import Type ( mkSynTy )
+import TyVar ( mkTyVar )
+import Name ( Name )
+import Unique ( rationalTyConKey )
+import TysWiredIn ( integerTy )
+import PragmaInfo ( PragmaInfo(..) )
+import ErrUtils ( pprBagOfErrors )
+import Maybes ( maybeToBool )
import Pretty
-import Util ( panic )
-
-
---import TcPragmas ( tcGenPragmas )
-import IdInfo ( noIdInfo )
-tcGenPragmas ty id ps = returnNF_Tc noIdInfo
+import PprStyle ( PprStyle(..) )
+import Util ( zipWithEqual, panic, pprTrace, pprPanic )
+import IdInfo
\end{code}
Ultimately, type signatures in interfaces will have pragmatic
signatures.
\begin{code}
-tcInterfaceSigs :: [RenamedSig] -> TcM s [Id]
+tcInterfaceSigs :: [RenamedHsDecl] -> TcM s [Id]
+ -- Ignore non-sig-decls in these decls
+
+tcInterfaceSigs (SigD (IfaceSig name ty id_infos src_loc) : rest)
+ = tcAddSrcLoc src_loc $
+ tcHsType ty `thenTc` \ sigma_ty ->
+ tcIdInfo name sigma_ty noIdInfo id_infos `thenTc` \ id_info' ->
+ let
+ sig_id = mkImported name sigma_ty id_info'
+ in
+ tcInterfaceSigs rest `thenTc` \ sig_ids ->
+ returnTc (sig_id : sig_ids)
+
+tcInterfaceSigs (other_decl : rest) = tcInterfaceSigs rest
tcInterfaceSigs [] = returnTc []
+\end{code}
+
+\begin{code}
+tcIdInfo name ty info [] = returnTc info
+
+tcIdInfo name ty info (HsArity arity : rest)
+ = tcIdInfo name ty (info `addArityInfo` arity) rest
+
+tcIdInfo name ty info (HsUpdate upd : rest)
+ = tcIdInfo name ty (info `addUpdateInfo` upd) rest
+
+tcIdInfo name ty info (HsFBType fb : rest)
+ = tcIdInfo name ty (info `addFBTypeInfo` fb) rest
+
+tcIdInfo name ty info (HsArgUsage au : rest)
+ = tcIdInfo name ty (info `addArgUsageInfo` au) rest
+
+tcIdInfo name ty info (HsDeforest df : rest)
+ = tcIdInfo name ty (info `addDeforestInfo` df) rest
+
+tcIdInfo name ty info (HsUnfold expr : rest)
+ = tcUnfolding name expr `thenNF_Tc` \ unfold_info ->
+ tcIdInfo name ty (info `addUnfoldInfo` unfold_info) rest
+
+tcIdInfo name ty info (HsStrictness strict : rest)
+ = tcStrictness ty info strict `thenTc` \ info' ->
+ tcIdInfo name ty info' rest
+\end{code}
+
+\begin{code}
+tcStrictness ty info (StrictnessInfo demands maybe_worker)
+ = tcWorker maybe_worker `thenNF_Tc` \ maybe_worker_id ->
+ uniqSMToTcM (mkWrapper ty demands) `thenNF_Tc` \ wrap_fn ->
+ let
+ -- Watch out! We can't pull on maybe_worker_id too eagerly!
+ info' = case maybe_worker_id of
+ Just worker_id -> info `addUnfoldInfo` mkUnfolding False (wrap_fn worker_id)
+ Nothing -> info
+ in
+ returnTc (info' `addStrictnessInfo` StrictnessInfo demands maybe_worker_id)
+
+-- Boring to write these out, but the result type differs from the arg type...
+tcStrictness ty info BottomGuaranteed
+ = returnTc (info `addStrictnessInfo` BottomGuaranteed)
+tcStrictness ty info NoStrictnessInfo
+ = returnTc info
+\end{code}
+
+\begin{code}
+tcWorker Nothing = returnNF_Tc Nothing
+
+tcWorker (Just worker_name)
+ = tcLookupGlobalValueMaybe worker_name `thenNF_Tc` \ maybe_worker_id ->
+ returnNF_Tc (trace_maybe maybe_worker_id)
+ where
+ -- The trace is so we can see what's getting dropped
+ trace_maybe Nothing = pprTrace "tcWorker failed:" (ppr PprDebug worker_name) Nothing
+ trace_maybe (Just x) = Just x
+\end{code}
+
+For unfoldings we try to do the job lazily, so that we never type check
+an unfolding that isn't going to be looked at.
+
+\begin{code}
+tcUnfolding name core_expr
+ = forkNF_Tc (
+ recoverNF_Tc no_unfolding (
+ tcCoreExpr core_expr `thenTc` \ core_expr' ->
+ returnTc (mkUnfolding False core_expr')
+ ))
+ where
+ -- The trace tells what wasn't available, for the benefit of
+ -- compiler hackers who want to improve it!
+ no_unfolding = getErrsTc `thenNF_Tc` \ (warns,errs) ->
+ returnNF_Tc (pprTrace "tcUnfolding failed with:"
+ (ppHang (ppr PprDebug name) 4 (pprBagOfErrors PprDebug errs))
+ NoUnfolding)
+\end{code}
+
+
+Variables in unfoldings
+~~~~~~~~~~~~~~~~~~~~~~~
+****** Inside here we use only the Global environment, even for locally bound variables.
+****** Why? Because we know all the types and want to bind them to real Ids.
+
+\begin{code}
+tcVar :: Name -> TcM s Id
+tcVar name
+ = tcLookupGlobalValueMaybe name `thenNF_Tc` \ maybe_id ->
+ case maybe_id of {
+ Just id -> returnTc id;
+ Nothing -> failTc (noDecl name)
+ }
-tcInterfaceSigs (Sig name@(RnName full_name) ty pragmas src_loc : sigs)
- = tcAddSrcLoc src_loc (
- tcPolyType ty `thenTc` \ sigma_ty ->
- fixTc ( \ rec_id ->
- tcGenPragmas (Just sigma_ty) rec_id pragmas
- `thenNF_Tc` \ id_info ->
- returnTc (mkImported full_name sigma_ty id_info)
- )) `thenTc` \ id ->
- tcInterfaceSigs sigs `thenTc` \ sigs' ->
- returnTc (id:sigs')
-
-
-tcInterfaceSigs (Sig odd_name _ _ src_loc : sigs)
- = case odd_name of
- WiredInId _ | opt_CompilingPrelude
- -> tcInterfaceSigs sigs
- _ -> tcAddSrcLoc src_loc $
- failTc (ifaceSigNameErr odd_name)
-
-ifaceSigNameErr name sty
- = ppHang (ppStr "Bad name in an interface type signature (a Prelude name?)")
- 4 (ppr sty name)
+noDecl name sty = ppCat [ppStr "Warning: no binding for", ppr sty name]
\end{code}
+
+UfCore expressions.
+
+\begin{code}
+tcCoreExpr :: UfExpr Name -> TcM s CoreExpr
+
+tcCoreExpr (UfVar name)
+ = tcVar name `thenTc` \ id ->
+ returnTc (Var id)
+
+-- rationalTy isn't built in so we have to construct it
+-- (the "ty" part of the incoming literal is simply bottom)
+tcCoreExpr (UfLit (NoRepRational lit _))
+ = tcLookupTyConByKey rationalTyConKey `thenNF_Tc` \ rational_tycon ->
+ let
+ rational_ty = mkSynTy rational_tycon []
+ in
+ returnTc (Lit (NoRepRational lit rational_ty))
+
+-- Similarly for integers, except that it is wired in
+tcCoreExpr (UfLit (NoRepInteger lit _))
+ = returnTc (Lit (NoRepInteger lit integerTy))
+
+tcCoreExpr (UfLit other_lit)
+ = returnTc (Lit other_lit)
+
+tcCoreExpr (UfCon con args)
+ = tcVar con `thenTc` \ con_id ->
+ mapTc tcCoreArg args `thenTc` \ args' ->
+ returnTc (Con con_id args')
+
+tcCoreExpr (UfPrim prim args)
+ = tcCorePrim prim `thenTc` \ primop ->
+ mapTc tcCoreArg args `thenTc` \ args' ->
+ returnTc (Prim primop args')
+
+tcCoreExpr (UfApp fun arg)
+ = tcCoreExpr fun `thenTc` \ fun' ->
+ tcCoreArg arg `thenTc` \ arg' ->
+ returnTc (App fun' arg')
+
+tcCoreExpr (UfCase scrut alts)
+ = tcCoreExpr scrut `thenTc` \ scrut' ->
+ tcCoreAlts alts `thenTc` \ alts' ->
+ returnTc (Case scrut' alts')
+
+tcCoreExpr (UfSCC cc expr)
+ = tcCoreExpr expr `thenTc` \ expr' ->
+ returnTc (SCC cc expr')
+
+tcCoreExpr(UfCoerce coercion ty body)
+ = tcCoercion coercion `thenTc` \ coercion' ->
+ tcHsTypeKind ty `thenTc` \ (_,ty') ->
+ tcCoreExpr body `thenTc` \ body' ->
+ returnTc (Coerce coercion' ty' body')
+
+tcCoreExpr (UfLam bndr body)
+ = tcCoreLamBndr bndr $ \ bndr' ->
+ tcCoreExpr body `thenTc` \ body' ->
+ returnTc (Lam bndr' body')
+
+tcCoreExpr (UfLet (UfNonRec bndr rhs) body)
+ = tcCoreExpr rhs `thenTc` \ rhs' ->
+ tcCoreValBndr bndr $ \ bndr' ->
+ tcCoreExpr body `thenTc` \ body' ->
+ returnTc (Let (NonRec bndr' rhs') body')
+
+tcCoreExpr (UfLet (UfRec pairs) body)
+ = tcCoreValBndrs bndrs $ \ bndrs' ->
+ mapTc tcCoreExpr rhss `thenTc` \ rhss' ->
+ tcCoreExpr body `thenTc` \ body' ->
+ returnTc (Let (Rec (bndrs' `zip` rhss')) body')
+ where
+ (bndrs, rhss) = unzip pairs
+\end{code}
+
+\begin{code}
+tcCoreLamBndr (UfValBinder name ty) thing_inside
+ = tcHsType ty `thenTc` \ ty' ->
+ let
+ id = mkUserId name ty' NoPragmaInfo
+ in
+ tcExtendGlobalValEnv [id] $
+ thing_inside (ValBinder id)
+
+tcCoreLamBndr (UfTyBinder name kind) thing_inside
+ = let
+ tyvar = mkTyVar name kind
+ in
+ tcExtendTyVarEnv [name] [(kindToTcKind kind, tyvar)] $
+ thing_inside (TyBinder tyvar)
+
+tcCoreLamBndr (UfUsageBinder name) thing_inside
+ = error "tcCoreLamBndr: usage"
+
+tcCoreValBndr (UfValBinder name ty) thing_inside
+ = tcHsType ty `thenTc` \ ty' ->
+ let
+ id = mkUserId name ty' NoPragmaInfo
+ in
+ tcExtendGlobalValEnv [id] $
+ thing_inside id
+
+tcCoreValBndrs bndrs thing_inside -- Expect them all to be ValBinders
+ = mapTc tcHsType tys `thenTc` \ tys' ->
+ let
+ ids = zipWithEqual "tcCoreValBndr" mk_id names tys'
+ mk_id name ty' = mkUserId name ty' NoPragmaInfo
+ in
+ tcExtendGlobalValEnv ids $
+ thing_inside ids
+ where
+ names = map (\ (UfValBinder name _) -> name) bndrs
+ tys = map (\ (UfValBinder _ ty) -> ty) bndrs
+\end{code}
+
+\begin{code}
+tcCoreArg (UfVarArg v) = tcVar v `thenTc` \ v' -> returnTc (VarArg v')
+tcCoreArg (UfTyArg ty) = tcHsTypeKind ty `thenTc` \ (_,ty') -> returnTc (TyArg ty')
+tcCoreArg (UfLitArg lit) = returnTc (LitArg lit)
+tcCoreArg (UfUsageArg u) = error "tcCoreArg: usage"
+
+tcCoreAlts (UfAlgAlts alts deflt)
+ = mapTc tc_alt alts `thenTc` \ alts' ->
+ tcCoreDefault deflt `thenTc` \ deflt' ->
+ returnTc (AlgAlts alts' deflt')
+ where
+ tc_alt (con, bndrs, rhs) = tcVar con `thenTc` \ con' ->
+ tcCoreValBndrs bndrs $ \ bndrs' ->
+ tcCoreExpr rhs `thenTc` \ rhs' ->
+ returnTc (con', bndrs', rhs')
+
+tcCoreAlts (UfPrimAlts alts deflt)
+ = mapTc tc_alt alts `thenTc` \ alts' ->
+ tcCoreDefault deflt `thenTc` \ deflt' ->
+ returnTc (PrimAlts alts' deflt')
+ where
+ tc_alt (lit, rhs) = tcCoreExpr rhs `thenTc` \ rhs' ->
+ returnTc (lit, rhs')
+
+tcCoreDefault UfNoDefault = returnTc NoDefault
+tcCoreDefault (UfBindDefault bndr rhs) = tcCoreValBndr bndr $ \ bndr' ->
+ tcCoreExpr rhs `thenTc` \ rhs' ->
+ returnTc (BindDefault bndr' rhs')
+
+tcCoercion (UfIn n) = tcVar n `thenTc` \ n' -> returnTc (CoerceIn n')
+tcCoercion (UfOut n) = tcVar n `thenTc` \ n' -> returnTc (CoerceOut n')
+
+tcCorePrim (UfOtherOp op)
+ = tcVar op `thenTc` \ op_id ->
+ case isPrimitiveId_maybe op_id of
+ Just prim_op -> returnTc prim_op
+ Nothing -> pprPanic "tcCorePrim" (ppr PprDebug op_id)
+
+tcCorePrim (UfCCallOp str casm gc arg_tys res_ty)
+ = mapTc tcHsType arg_tys `thenTc` \ arg_tys' ->
+ tcHsType res_ty `thenTc` \ res_ty' ->
+ returnTc (CCallOp str casm gc arg_tys' res_ty')
+\end{code}
+
+
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