IMP_Ubiq(){-uitous-}
import Kind ( mkUnboxedTypeKind, mkBoxedTypeKind, mkTypeKind, mkArrowKind )
-import Name ( mkBuiltinName )
-import PrelMods ( pRELUDE_BUILTIN )
+import Name ( mkWiredInTyConName )
import PrimRep ( PrimRep(..) ) -- getPrimRepInfo uses PrimRep repn
-import TyCon ( mkPrimTyCon, mkDataTyCon, NewOrData(..) )
+import TyCon ( mkPrimTyCon, mkDataTyCon, SYN_IE(TyCon) )
+import BasicTypes ( NewOrData(..) )
+import Type ( applyTyCon, mkTyVarTys, mkTyConTy, SYN_IE(Type) )
import TyVar ( GenTyVar(..), alphaTyVars )
-import Type ( applyTyCon, mkTyVarTys )
import Usage ( usageOmega )
+import PrelMods ( gHC__ )
import Unique
-
\end{code}
\begin{code}
pcPrimTyCon :: Unique{-TyConKey-} -> FAST_STRING -> Int -> PrimRep -> TyCon
pcPrimTyCon key str arity primrep
- = mkPrimTyCon name (mk_kind arity) primrep
+ = the_tycon
where
- name = mkBuiltinName key pRELUDE_BUILTIN str
-
+ name = mkWiredInTyConName key gHC__ str the_tycon
+ the_tycon = mkPrimTyCon name (mk_kind arity) primrep
mk_kind 0 = mkUnboxedTypeKind
mk_kind n = mkTypeKind `mkArrowKind` mk_kind (n-1)
system, to parameterise State#.
\begin{code}
-realWorldTy = applyTyCon realWorldTyCon []
-realWorldTyCon
- = mkDataTyCon name mkBoxedTypeKind
- [{-no tyvars-}]
- [{-no context-}]
- [{-no data cons!-}] -- we tell you *nothing* about this guy
- [{-no derivings-}]
- DataType
- where
- name = mkBuiltinName realWorldTyConKey pRELUDE_BUILTIN SLIT("_RealWorld")
-
+realWorldTy = applyTyCon realWorldTyCon []
+realWorldTyCon = mk_no_constr_tycon realWorldTyConKey SLIT("RealWorld")
realWorldStatePrimTy = mkStatePrimTy realWorldTy
\end{code}
Note: the ``state-pairing'' types are not truly primitive, so they are
defined in \tr{TysWiredIn.lhs}, not here.
+\begin{code}
+-- The Void type is represented as a data type with no constructors
+-- It's a built in type (i.e. there's no way to define it in Haskell;
+-- the nearest would be
+--
+-- data Void = -- No constructors!
+--
+-- ) It's boxed; there is only one value of this
+-- type, namely "void", whose semantics is just bottom.
+voidTy = mkTyConTy voidTyCon
+voidTyCon = mk_no_constr_tycon voidTyConKey SLIT("Void")
+\end{code}
+
+\begin{code}
+mk_no_constr_tycon key str
+ = the_tycon
+ where
+ name = mkWiredInTyConName key gHC__ str the_tycon
+ the_tycon = mkDataTyCon name mkBoxedTypeKind
+ [{-no tyvars-}]
+ [{-no context-}]
+ [{-no data cons!-}] -- we tell you *nothing* about this guy
+ [{-no derivings-}]
+ DataType
+\end{code}
+
%************************************************************************
%* *
\subsection[TysPrim-arrays]{The primitive array types}