\begin{code}
module TcHsType (
- tcHsSigType, tcHsDeriv,
+ tcHsSigType, tcHsSigTypeNC, tcHsDeriv,
tcHsInstHead, tcHsQuantifiedType,
UserTypeCtxt(..),
#include "HsVersions.h"
+#ifdef GHCI /* Only if bootstrapped */
+import {-# SOURCE #-} TcSplice( kcSpliceType )
+#endif
+
import HsSyn
import RnHsSyn
import TcRnMonad
import TyCon
import Class
import Name
-import OccName
import NameSet
import PrelNames
import TysWiredIn
import UniqSupply
import Outputable
import FastString
-
-import Control.Monad
\end{code}
%************************************************************************
\begin{code}
-tcHsSigType :: UserTypeCtxt -> LHsType Name -> TcM Type
+tcHsSigType, tcHsSigTypeNC :: UserTypeCtxt -> LHsType Name -> TcM Type
-- Do kind checking, and hoist for-alls to the top
-- NB: it's important that the foralls that come from the top-level
-- HsForAllTy in hs_ty occur *first* in the returned type.
-- See Note [Scoped] with TcSigInfo
tcHsSigType ctxt hs_ty
= addErrCtxt (pprHsSigCtxt ctxt hs_ty) $
- do { kinded_ty <- kcTypeType hs_ty
+ tcHsSigTypeNC ctxt hs_ty
+
+tcHsSigTypeNC ctxt hs_ty
+ = do { (kinded_ty, _kind) <- kc_lhs_type hs_ty
+ -- The kind is checked by checkValidType, and isn't necessarily
+ -- of kind * in a Template Haskell quote eg [t| Maybe |]
; ty <- tcHsKindedType kinded_ty
; checkValidType ctxt ty
; return ty }
; return (HsForAllTy exp tv_names' ctxt' ty', liftedTypeKind) }
-kc_hs_type (HsBangTy b ty) = do
- (ty', kind) <- kc_lhs_type ty
- return (HsBangTy b ty', kind)
+kc_hs_type (HsBangTy b ty)
+ = do { (ty', kind) <- kc_lhs_type ty
+ ; return (HsBangTy b ty', kind) }
+
+kc_hs_type ty@(HsRecTy _)
+ = failWithTc (ptext (sLit "Unexpected record type") <+> ppr ty)
+ -- Record types (which only show up temporarily in constructor signatures)
+ -- should have been removed by now
-kc_hs_type ty@(HsSpliceTy _)
- = failWithTc (ptext (sLit "Unexpected type splice:") <+> ppr ty)
+#ifdef GHCI /* Only if bootstrapped */
+kc_hs_type (HsSpliceTy sp) = kcSpliceType sp
+#else
+kc_hs_type ty@(HsSpliceTy _) = failWithTc (ptext (sLit "Unexpected type splice:") <+> ppr ty)
+#endif
-- remove the doc nodes here, no need to worry about the location since
-- its the same for a doc node and it's child type node
ds_type (HsParTy ty) -- Remove the parentheses markers
= dsHsType ty
-ds_type ty@(HsBangTy _ _) -- No bangs should be here
+ds_type ty@(HsBangTy {}) -- No bangs should be here
= failWithTc (ptext (sLit "Unexpected strictness annotation:") <+> ppr ty)
+ds_type ty@(HsRecTy {}) -- No bangs should be here
+ = failWithTc (ptext (sLit "Unexpected record type:") <+> ppr ty)
+
ds_type (HsKindSig ty _)
= dsHsType ty -- Kind checking done already