\section[TcIfaceSig]{Type checking of type signatures in interface files}
\begin{code}
-#include "HsVersions.h"
-
module TcIfaceSig ( tcInterfaceSigs ) where
-IMP_Ubiq()
+#include "HsVersions.h"
+import HsSyn ( HsDecl(..), IfaceSig(..) )
import TcMonad
-import TcMonoType ( tcHsType, tcHsTypeKind )
-import TcEnv ( tcLookupGlobalValue, tcExtendTyVarEnv, tcExtendGlobalValEnv,
- tcLookupTyConByKey, tcLookupGlobalValueMaybe, tcLookupLocalValue,
- tcExplicitLookupGlobal
+import TcMonoType ( tcHsType, tcHsTypeKind, tcTyVarScope )
+import TcEnv ( tcExtendTyVarEnv, tcExtendGlobalValEnv, tcSetGlobalValEnv,
+ tcLookupTyConByKey, tcLookupGlobalValueMaybe,
+ tcExplicitLookupGlobal,
+ GlobalValueEnv
)
import TcKind ( TcKind, kindToTcKind )
-import HsSyn ( IfaceSig(..), HsDecl(..), TyDecl, ClassDecl, InstDecl, DefaultDecl, HsBinds,
- Fake, InPat, HsType )
-import RnHsSyn ( RenamedHsDecl(..) )
+import RnHsSyn ( RenamedHsDecl )
import HsCore
import HsDecls ( HsIdInfo(..), HsStrictnessInfo(..) )
import Literal ( Literal(..) )
import CoreUnfold
import MagicUFs ( MagicUnfoldingFun )
import WwLib ( mkWrapper )
-import SpecEnv ( SpecEnv )
import PrimOp ( PrimOp(..) )
-import Id ( GenId, mkImported, mkUserId, addInlinePragma,
- isPrimitiveId_maybe, dataConArgTys, SYN_IE(Id) )
-import Type ( mkSynTy, getAppDataTyConExpandingDicts )
+import MkId ( mkImportedId, mkUserId )
+import Id ( Id, addInlinePragma, isPrimitiveId_maybe, dataConArgTys )
+import IdInfo
+import SpecEnv ( addToSpecEnv )
+import Type ( mkSynTy, splitAlgTyConApp )
import TyVar ( mkSysTyVar )
import Name ( Name )
import Unique ( rationalTyConKey, uniqueOf )
import TysWiredIn ( integerTy )
-import PragmaInfo ( PragmaInfo(..) )
import ErrUtils ( pprBagOfErrors )
-import Maybes ( maybeToBool )
-import Pretty
-import Outputable ( Outputable(..), PprStyle(..) )
-import Util ( zipWithEqual, panic, pprTrace, pprPanic )
+import Maybes ( maybeToBool, MaybeErr(..) )
+import Outputable
+import Util ( zipWithEqual )
-import IdInfo
\end{code}
Ultimately, type signatures in interfaces will have pragmatic
signatures.
\begin{code}
-tcInterfaceSigs :: TcEnv s -- Envt to use when checking unfoldings
+tcInterfaceSigs :: GlobalValueEnv -- Envt to use when checking unfoldings
-> [RenamedHsDecl] -- Ignore non-sig-decls in these decls
-> TcM s [Id]
= tcAddSrcLoc src_loc (
tcAddErrCtxt (ifaceSigCtxt name) (
tcHsType ty `thenTc` \ sigma_ty ->
- tcIdInfo unf_env name sigma_ty noIdInfo id_infos `thenTc` \ id_info' ->
- let
- imp_id = mkImported name sigma_ty id_info'
- sig_id | any inline_please id_infos = addInlinePragma imp_id
- | otherwise = imp_id
-
- inline_please (HsUnfold inline _) = inline
- inline_please other = False
- in
- returnTc sig_id
+ tcIdInfo unf_env name sigma_ty noIdInfo id_infos `thenTc` \ id_info ->
+ returnTc (mkImportedId name sigma_ty id_info)
)) `thenTc` \ sig_id ->
tcInterfaceSigs unf_env rest `thenTc` \ sig_ids ->
returnTc (sig_id : sig_ids)
\begin{code}
tcIdInfo unf_env name ty info info_ins
- = go noIdInfo info_ins
+ = foldlTc tcPrag noIdInfo info_ins
where
- go info_so_far [] = returnTc info_so_far
- go info (HsArity arity : rest) = go (info `addArityInfo` arity) rest
- go info (HsUpdate upd : rest) = go (info `addUpdateInfo` upd) rest
- go info (HsFBType fb : rest) = go (info `addFBTypeInfo` fb) rest
- go info (HsArgUsage au : rest) = go (info `addArgUsageInfo` au) rest
-
- go info (HsUnfold inline expr : rest) = tcUnfolding unf_env name expr `thenNF_Tc` \ unfold_info ->
- go (info `addUnfoldInfo` unfold_info) rest
-
- go info (HsStrictness strict : rest) = tcStrictness unf_env ty info strict `thenTc` \ info' ->
- go info' rest
+ tcPrag info (HsArity arity) = returnTc (arity `setArityInfo` info)
+ tcPrag info (HsUpdate upd) = returnTc (upd `setUpdateInfo` info)
+ tcPrag info (HsFBType fb) = returnTc (fb `setFBTypeInfo` info)
+ tcPrag info (HsArgUsage au) = returnTc (au `setArgUsageInfo` info)
+
+ tcPrag info (HsUnfold inline expr)
+ = tcPragExpr unf_env name expr `thenNF_Tc` \ maybe_expr' ->
+ let
+ -- maybe_expr doesn't get looked at if the unfolding
+ -- is never inspected; so the typecheck doesn't even happen
+ unfold_info = case maybe_expr' of
+ Nothing -> NoUnfolding
+ Just expr' -> mkUnfolding expr'
+ info1 = unfold_info `setUnfoldingInfo` info
+
+ info2 | inline = IWantToBeINLINEd `setInlinePragInfo` info1
+ | otherwise = info1
+ in
+ returnTc info2
+
+ tcPrag info (HsStrictness strict)
+ = tcStrictness unf_env ty info strict
+
+ tcPrag info (HsSpecialise tyvars tys rhs)
+ = tcTyVarScope tyvars $ \ tyvars' ->
+ mapAndUnzipTc tcHsTypeKind tys `thenTc` \ (kinds, tys') ->
+ -- Assume that the kinds match the kinds of the
+ -- type variables of the function; this is, after all, an
+ -- interface file generated by the compiler!
+
+ tcPragExpr unf_env name rhs `thenNF_Tc` \ maybe_rhs' ->
+ let
+ -- If spec_env isn't looked at, none of this
+ -- actually takes place
+ spec_env = specInfo info
+ spec_env' = case maybe_rhs' of
+ Nothing -> spec_env
+ Just rhs' -> case addToSpecEnv True {- overlap ok -} spec_env tyvars' tys' rhs' of
+ Succeeded spec_env' -> spec_env'
+ Failed err -> pprTrace "tcIdInfo: bad specialisation"
+ (ppr name <+> ppr err) $
+ spec_env
+ in
+ returnTc (spec_env' `setSpecInfo` info)
\end{code}
\begin{code}
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 NoPragmaInfo (wrap_fn worker_id)
+ Just worker_id -> setUnfoldingInfo (mkUnfolding (wrap_fn worker_id)) $
+ setInlinePragInfo IWantToBeINLINEd info
+
Nothing -> info
+
has_worker = maybeToBool maybe_worker_id
in
- returnTc (info' `addStrictnessInfo` StrictnessInfo demands has_worker)
+ returnTc (StrictnessInfo demands has_worker `setStrictnessInfo` info')
-- Boring to write these out, but the result type differs from the arg type...
tcStrictness unf_env ty info HsBottom
- = returnTc (info `addStrictnessInfo` BottomGuaranteed)
+ = returnTc (BottomGuaranteed `setStrictnessInfo` info)
\end{code}
\begin{code}
maybe_worker_id = tcExplicitLookupGlobal unf_env worker_name
-- The trace is so we can see what's getting dropped
- trace_maybe Nothing = pprTrace "tcWorker failed:" (ppr PprDebug worker_name) Nothing
+ trace_maybe Nothing = pprTrace "tcWorker failed:" (ppr worker_name) Nothing
trace_maybe (Just x) = Just x
\end{code}
an unfolding that isn't going to be looked at.
\begin{code}
-tcUnfolding unf_env name core_expr
+tcPragExpr unf_env name core_expr
= forkNF_Tc (
recoverNF_Tc no_unfolding (
- tcSetEnv unf_env $
+ tcSetGlobalValEnv unf_env $
tcCoreExpr core_expr `thenTc` \ core_expr' ->
- returnTc (mkUnfolding NoPragmaInfo core_expr')
+ returnTc (Just 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:"
- (hang (ppr PprDebug name) 4 (pprBagOfErrors PprDebug errs))
- NoUnfolding)
+ (hang (ppr name) 4 (pprBagOfErrors errs))
+ Nothing)
\end{code}
= tcLookupGlobalValueMaybe name `thenNF_Tc` \ maybe_id ->
case maybe_id of {
Just id -> returnTc id;
- Nothing -> failTc (noDecl name)
+ Nothing -> failWithTc (noDecl name)
}
-noDecl name sty = hsep [ptext SLIT("Warning: no binding for"), ppr sty name]
+noDecl name = hsep [ptext SLIT("Warning: no binding for"), ppr name]
\end{code}
UfCore expressions.
mapTc tcCoreArg args `thenTc` \ args' ->
returnTc (Prim primop args')
+tcCoreExpr (UfLam bndr body)
+ = tcCoreLamBndr bndr $ \ bndr' ->
+ tcCoreExpr body `thenTc` \ body' ->
+ returnTc (Lam bndr' body')
+
tcCoreExpr (UfApp fun arg)
= tcCoreExpr fun `thenTc` \ fun' ->
tcCoreArg arg `thenTc` \ arg' ->
tcCoreAlts (coreExprType scrut') 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' ->
returnTc (Let (Rec (bndrs' `zip` rhss')) body')
where
(bndrs, rhss) = unzip pairs
+
+tcCoreExpr (UfNote note expr)
+ = tcCoreExpr expr `thenTc` \ expr' ->
+ case note of
+ UfCoerce to_ty -> tcHsTypeKind to_ty `thenTc` \ (_,to_ty') ->
+ returnTc (Note (Coerce to_ty' (coreExprType expr')) expr')
+ UfInlineCall -> returnTc (Note InlineCall expr')
+ UfSCC cc -> returnTc (Note (SCC cc) expr')
+
+tcCoreNote (UfSCC cc) = returnTc (SCC cc)
+tcCoreNote UfInlineCall = returnTc InlineCall
\end{code}
\begin{code}
tcCoreLamBndr (UfValBinder name ty) thing_inside
= tcHsType ty `thenTc` \ ty' ->
let
- id = mkUserId name ty' NoPragmaInfo
+ id = mkUserId name ty'
in
tcExtendGlobalValEnv [id] $
thing_inside (ValBinder id)
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 = mk_id name ty'
+ id = mkUserId name ty'
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'
+ ids = zipWithEqual "tcCoreValBndr" mkUserId names tys'
in
tcExtendGlobalValEnv ids $
thing_inside ids
where
names = map (\ (UfValBinder name _) -> name) bndrs
tys = map (\ (UfValBinder _ ty) -> ty) bndrs
-
-mk_id name ty = mkUserId name ty NoPragmaInfo
\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 scrut_ty (UfAlgAlts alts deflt)
= mapTc tc_alt alts `thenTc` \ alts' ->
= tcVar con `thenTc` \ con' ->
let
arg_tys = dataConArgTys con' inst_tys
- (tycon, inst_tys, cons) = getAppDataTyConExpandingDicts scrut_ty
- arg_ids = zipWithEqual "tcCoreAlts" mk_id names arg_tys
+ (tycon, inst_tys, cons) = splitAlgTyConApp scrut_ty
+ arg_ids = zipWithEqual "tcCoreAlts" mkUserId names arg_tys
in
tcExtendGlobalValEnv arg_ids $
tcCoreExpr rhs `thenTc` \ rhs' ->
tcCoreDefault scrut_ty UfNoDefault = returnTc NoDefault
tcCoreDefault scrut_ty (UfBindDefault name rhs)
= let
- deflt_id = mk_id name scrut_ty
+ deflt_id = mkUserId name scrut_ty
in
tcExtendGlobalValEnv [deflt_id] $
tcCoreExpr rhs `thenTc` \ rhs' ->
returnTc (BindDefault deflt_id 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)
+ Nothing -> pprPanic "tcCorePrim" (ppr op_id)
tcCorePrim (UfCCallOp str casm gc arg_tys res_ty)
= mapTc tcHsType arg_tys `thenTc` \ arg_tys' ->
\end{code}
\begin{code}
-ifaceSigCtxt sig_name sty
- = hsep [ptext SLIT("In an interface-file signature for"), ppr sty sig_name]
+ifaceSigCtxt sig_name
+ = hsep [ptext SLIT("In an interface-file signature for"), ppr sig_name]
\end{code}
projects / ghc-hetmet.git / blobdiff