#include "HsVersions.h"
import HsSyn ( HsExpr(..), HsLit(..), ArithSeqInfo(..),
- HsBinds(..), MonoBinds(..), Stmt(..), StmtCtxt(..),
- mkMonoBind, nullMonoBinds
+ MonoBinds(..), StmtCtxt(..),
+ mkMonoBind, nullMonoBinds
)
import RnHsSyn ( RenamedHsExpr, RenamedRecordBinds )
-import TcHsSyn ( TcExpr, TcRecordBinds, mkHsConApp,
- mkHsTyApp, mkHsLet
- )
+import TcHsSyn ( TcExpr, TcRecordBinds, mkHsTyApp, mkHsLet )
import TcMonad
import BasicTypes ( RecFlag(..) )
-import Inst ( Inst, InstOrigin(..), OverloadedLit(..),
- LIE, emptyLIE, unitLIE, consLIE, plusLIE, plusLIEs,
- lieToList, listToLIE,
+import Inst ( InstOrigin(..),
+ LIE, emptyLIE, unitLIE, plusLIE, plusLIEs,
newOverloadedLit, newMethod, newIPDict,
instOverloadedFun, newDicts, newClassDicts,
getIPsOfLIE, instToId, ipToId
tcLookupValue, tcLookupClassByKey,
tcLookupValueByKey,
tcExtendGlobalTyVars, tcLookupValueMaybe,
- tcLookupTyCon, tcLookupDataCon
+ tcLookupTyConByKey, tcLookupDataCon
)
import TcMatches ( tcMatchesCase, tcMatchLambda, tcStmts )
import TcMonoType ( tcHsSigType, checkSigTyVars, sigCtxt )
-import TcPat ( badFieldCon )
-import TcSimplify ( tcSimplify, tcSimplifyAndCheck, partitionPredsOfLIE )
+import TcPat ( badFieldCon, simpleHsLitTy )
+import TcSimplify ( tcSimplifyAndCheck, partitionPredsOfLIE )
import TcImprove ( tcImprove )
import TcType ( TcType, TcTauType,
tcInstTyVars,
tcInstTcType, tcSplitRhoTy,
- newTyVarTy, newTyVarTy_OpenKind, zonkTcType )
+ newTyVarTy, newTyVarTys, zonkTcType )
-import Class ( Class )
-import FieldLabel ( FieldLabel, fieldLabelName, fieldLabelType, fieldLabelTyCon )
-import Id ( idType, recordSelectorFieldLabel, isRecordSelector,
- Id, mkVanillaId
- )
+import FieldLabel ( fieldLabelName, fieldLabelType, fieldLabelTyCon )
+import Id ( idType, recordSelectorFieldLabel, isRecordSelector, mkVanillaId )
import DataCon ( dataConFieldLabels, dataConSig,
dataConStrictMarks, StrictnessMark(..)
)
import Name ( Name, getName )
-import Type ( mkFunTy, mkAppTy, mkTyVarTy, mkTyVarTys,
- ipName_maybe,
+import Type ( mkFunTy, mkAppTy, mkTyVarTys, ipName_maybe,
splitFunTy_maybe, splitFunTys, isNotUsgTy,
mkTyConApp, splitSigmaTy,
splitRhoTy,
isTauTy, tyVarsOfType, tyVarsOfTypes,
isSigmaTy, splitAlgTyConApp, splitAlgTyConApp_maybe,
- boxedTypeKind, mkArrowKind,
+ boxedTypeKind, openTypeKind, mkArrowKind,
tidyOpenType
)
import TyCon ( TyCon, tyConTyVars )
import Subst ( mkTopTyVarSubst, substClasses, substTy )
import UsageSPUtils ( unannotTy )
-import VarSet ( emptyVarSet, unionVarSet, elemVarSet, mkVarSet )
-import TyCon ( tyConDataCons )
-import TysPrim ( intPrimTy, charPrimTy, doublePrimTy,
- floatPrimTy, addrPrimTy
- )
-import TysWiredIn ( boolTy, charTy, stringTy )
-import PrelInfo ( ioTyCon_NAME )
-import TcUnify ( unifyTauTy, unifyFunTy, unifyListTy, unifyTupleTy,
- unifyUnboxedTupleTy )
-import Unique ( cCallableClassKey, cReturnableClassKey,
+import VarSet ( elemVarSet, mkVarSet )
+import TysWiredIn ( boolTy )
+import TcUnify ( unifyTauTy, unifyFunTy, unifyListTy, unifyTupleTy )
+import PrelNames ( cCallableClassKey, cReturnableClassKey,
enumFromClassOpKey, enumFromThenClassOpKey,
enumFromToClassOpKey, enumFromThenToClassOpKey,
- thenMClassOpKey, failMClassOpKey, returnMClassOpKey
+ thenMClassOpKey, failMClassOpKey, returnMClassOpKey, ioTyConKey
)
import Outputable
import Maybes ( maybeToBool, mapMaybe )
tcExpr expr ty | isSigmaTy ty = -- Polymorphic case
tcPolyExpr expr ty `thenTc` \ (expr', lie, _, _, _) ->
- returnTc (expr', lie)
+ returnTc (expr', lie)
| otherwise = -- Monomorphic case
tcMonoExpr expr ty
%************************************************************************
%* *
-\subsection{Literals}
-%* *
-%************************************************************************
-
-Overloaded literals.
-
-\begin{code}
-tcMonoExpr (HsLit (HsInt i)) res_ty
- = newOverloadedLit (LiteralOrigin (HsInt i))
- (OverloadedIntegral i)
- res_ty `thenNF_Tc` \ stuff ->
- returnTc stuff
-
-tcMonoExpr (HsLit (HsFrac f)) res_ty
- = newOverloadedLit (LiteralOrigin (HsFrac f))
- (OverloadedFractional f)
- res_ty `thenNF_Tc` \ stuff ->
- returnTc stuff
-
-
-tcMonoExpr (HsLit lit@(HsLitLit s)) res_ty
- = tcLookupClassByKey cCallableClassKey `thenNF_Tc` \ cCallableClass ->
- newClassDicts (LitLitOrigin (_UNPK_ s))
- [(cCallableClass,[res_ty])] `thenNF_Tc` \ (dicts, _) ->
- returnTc (HsLitOut lit res_ty, dicts)
-\end{code}
-
-Primitive literals:
-
-\begin{code}
-tcMonoExpr (HsLit lit@(HsCharPrim c)) res_ty
- = unifyTauTy res_ty charPrimTy `thenTc_`
- returnTc (HsLitOut lit charPrimTy, emptyLIE)
-
-tcMonoExpr (HsLit lit@(HsStringPrim s)) res_ty
- = unifyTauTy res_ty addrPrimTy `thenTc_`
- returnTc (HsLitOut lit addrPrimTy, emptyLIE)
-
-tcMonoExpr (HsLit lit@(HsIntPrim i)) res_ty
- = unifyTauTy res_ty intPrimTy `thenTc_`
- returnTc (HsLitOut lit intPrimTy, emptyLIE)
-
-tcMonoExpr (HsLit lit@(HsFloatPrim f)) res_ty
- = unifyTauTy res_ty floatPrimTy `thenTc_`
- returnTc (HsLitOut lit floatPrimTy, emptyLIE)
-
-tcMonoExpr (HsLit lit@(HsDoublePrim d)) res_ty
- = unifyTauTy res_ty doublePrimTy `thenTc_`
- returnTc (HsLitOut lit doublePrimTy, emptyLIE)
-\end{code}
-
-Unoverloaded literals:
-
-\begin{code}
-tcMonoExpr (HsLit lit@(HsChar c)) res_ty
- = unifyTauTy res_ty charTy `thenTc_`
- returnTc (HsLitOut lit charTy, emptyLIE)
-
-tcMonoExpr (HsLit lit@(HsString str)) res_ty
- = unifyTauTy res_ty stringTy `thenTc_`
- returnTc (HsLitOut lit stringTy, emptyLIE)
-\end{code}
-
-%************************************************************************
-%* *
\subsection{Other expression forms}
%* *
%************************************************************************
\begin{code}
-tcMonoExpr (HsPar expr) res_ty -- preserve parens so printing needn't guess where they go
- = tcMonoExpr expr res_ty
-
--- perform the negate *before* overloading the integer, since the case
--- of minBound on Ints fails otherwise. Could be done elsewhere, but
--- convenient to do it here.
+tcMonoExpr (HsLit lit) res_ty = tcLit lit res_ty
+tcMonoExpr (HsOverLit lit) res_ty = newOverloadedLit (LiteralOrigin lit) lit res_ty
+tcMonoExpr (HsPar expr) res_ty = tcMonoExpr expr res_ty
-tcMonoExpr (NegApp (HsLit (HsInt i)) neg) res_ty
- = tcMonoExpr (HsLit (HsInt (-i))) res_ty
-
-tcMonoExpr (NegApp expr neg) res_ty
- = tcMonoExpr (HsApp neg expr) res_ty
+tcMonoExpr (NegApp expr neg) res_ty
+ = tcMonoExpr (HsApp (HsVar neg) expr) res_ty
tcMonoExpr (HsLam match) res_ty
= tcMatchLambda match res_ty `thenTc` \ (match',lie) ->
= -- Get the callable and returnable classes.
tcLookupClassByKey cCallableClassKey `thenNF_Tc` \ cCallableClass ->
tcLookupClassByKey cReturnableClassKey `thenNF_Tc` \ cReturnableClass ->
- tcLookupTyCon ioTyCon_NAME `thenNF_Tc` \ ioTyCon ->
+ tcLookupTyConByKey ioTyConKey `thenNF_Tc` \ ioTyCon ->
let
new_arg_dict (arg, arg_ty)
= newClassDicts (CCallOrigin (_UNPK_ lbl) (Just arg))
tv_idxs | n_args == 0 = []
| otherwise = [1..n_args]
in
- mapNF_Tc (\ _ -> newTyVarTy_OpenKind) tv_idxs `thenNF_Tc` \ arg_tys ->
+ newTyVarTys (length tv_idxs) openTypeKind `thenNF_Tc` \ arg_tys ->
tcMonoExprs args arg_tys `thenTc` \ (args', args_lie) ->
-- The argument types can be unboxed or boxed; the result
= tcAddErrCtxt (listCtxt expr) $
tcMonoExpr expr elt_ty
-tcMonoExpr (ExplicitTuple exprs boxed) res_ty
- = (if boxed
- then unifyTupleTy (length exprs) res_ty
- else unifyUnboxedTupleTy (length exprs) res_ty
- ) `thenTc` \ arg_tys ->
+tcMonoExpr (ExplicitTuple exprs boxity) res_ty
+ = unifyTupleTy boxity (length exprs) res_ty `thenTc` \ arg_tys ->
mapAndUnzipTc (\ (expr, arg_ty) -> tcMonoExpr expr arg_ty)
(exprs `zip` arg_tys) -- we know they're of equal length.
`thenTc` \ (exprs', lies) ->
- returnTc (ExplicitTuple exprs' boxed, plusLIEs lies)
+ returnTc (ExplicitTuple exprs' boxity, plusLIEs lies)
tcMonoExpr expr@(RecordCon con_name rbinds) res_ty
= tcAddErrCtxt (recordConCtxt expr) $
revBinds b = b
tcIPBinds ((name, expr) : binds)
- = newTyVarTy_OpenKind `thenTc` \ ty ->
+ = newTyVarTy openTypeKind `thenTc` \ ty ->
tcGetSrcLoc `thenTc` \ loc ->
let id = ipToId name ty loc in
tcMonoExpr expr ty `thenTc` \ (expr', lie) ->
= case id_expr of
HsVar name -> tcId name `thenNF_Tc` \ stuff ->
returnTc stuff
- other -> newTyVarTy_OpenKind `thenNF_Tc` \ id_ty ->
+ other -> newTyVarTy openTypeKind `thenNF_Tc` \ id_ty ->
tcMonoExpr id_expr id_ty `thenTc` \ (id_expr', lie_id) ->
returnTc (id_expr', lie_id, id_ty)
\end{code}
-- Check that the result type doesn't have any nested for-alls.
-- For example, a "build" on its own is no good; it must be applied to something.
checkTc (isTauTy actual_result_ty)
- (lurkingRank2Err fun fun_ty) `thenTc_`
+ (lurkingRank2Err fun actual_result_ty) `thenTc_`
returnTc (fun', args', lie_fun `plusLIE` plusLIEs lie_args_s)
tcLookupValueMaybe name `thenNF_Tc` \ maybe_local ->
case maybe_local of
- Just tc_id -> instantiate_it (OccurrenceOf tc_id) (HsVar tc_id) (unannotTy (idType tc_id))
+ Just tc_id -> instantiate_it (OccurrenceOf tc_id) tc_id (unannotTy (idType tc_id))
Nothing -> tcLookupValue name `thenNF_Tc` \ id ->
tcInstId id `thenNF_Tc` \ (tyvars, theta, tau) ->
- instantiate_it2 (OccurrenceOf id) (HsVar id) tyvars theta tau
+ instantiate_it2 (OccurrenceOf id) id tyvars theta tau
where
-- The instantiate_it loop runs round instantiating the Id.
instantiate_it2 orig fun tyvars theta tau
= if null theta then -- Is it overloaded?
- returnNF_Tc (mkHsTyApp fun arg_tys, emptyLIE, tau)
+ returnNF_Tc (mkHsTyApp (HsVar fun) arg_tys, emptyLIE, tau)
else
-- Yes, it's overloaded
instOverloadedFun orig fun arg_tys theta tau `thenNF_Tc` \ (fun', lie1) ->
\end{code}
-% =================================================
+%************************************************************************
+%* *
+\subsection{Literals}
+%* *
+%************************************************************************
-Errors and contexts
-~~~~~~~~~~~~~~~~~~~
+Overloaded literals.
+
+\begin{code}
+tcLit :: HsLit -> TcType -> TcM s (TcExpr, LIE)
+tcLit (HsLitLit s _) res_ty
+ = tcLookupClassByKey cCallableClassKey `thenNF_Tc` \ cCallableClass ->
+ newClassDicts (LitLitOrigin (_UNPK_ s))
+ [(cCallableClass,[res_ty])] `thenNF_Tc` \ (dicts, _) ->
+ returnTc (HsLit (HsLitLit s res_ty), dicts)
+
+tcLit lit res_ty
+ = unifyTauTy res_ty (simpleHsLitTy lit) `thenTc_`
+ returnTc (HsLit lit, emptyLIE)
+\end{code}
+
+
+%************************************************************************
+%* *
+\subsection{Errors and contexts}
+%* *
+%************************************************************************
Mini-utils:
+
\begin{code}
pp_nest_hang :: String -> SDoc -> SDoc
pp_nest_hang lbl stuff = nest 2 (hang (text lbl) 4 stuff)
lurkingRank2Err fun fun_ty
= hang (hsep [ptext SLIT("Illegal use of"), quotes (ppr fun)])
4 (vcat [ptext SLIT("It is applied to too few arguments"),
- ptext SLIT("so that the result type has for-alls in it")])
-
-rank2ArgCtxt arg expected_arg_ty
- = ptext SLIT("In a polymorphic function argument:") <+> ppr arg
+ ptext SLIT("so that the result type has for-alls in it:") <+> ppr fun_ty])
badFieldsUpd rbinds
= hang (ptext SLIT("No constructor has all these fields:"))
notSelector field
= hsep [quotes (ppr field), ptext SLIT("is not a record selector")]
-illegalCcallTyErr isArg ty
- = hang (hsep [ptext SLIT("Unacceptable"), arg_or_res, ptext SLIT("type in _ccall_ or _casm_:")])
- 4 (hsep [ppr ty])
- where
- arg_or_res
- | isArg = ptext SLIT("argument")
- | otherwise = ptext SLIT("result")
-
-
missingStrictFieldCon :: Name -> Name -> SDoc
missingStrictFieldCon con field
= hsep [ptext SLIT("Constructor") <+> quotes (ppr con),
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