\section[TysPrim]{Wired-in knowledge about primitive types}
\begin{code}
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
module TysPrim(
alphaTyVars, betaTyVars, alphaTyVar, betaTyVar, gammaTyVar, deltaTyVar,
alphaTy, betaTy, gammaTy, deltaTy,
- openAlphaTy, openAlphaTyVar, openAlphaTyVars,
+ openAlphaTy, openBetaTy, openAlphaTyVar, openBetaTyVar, openAlphaTyVars,
primTyCons,
word32PrimTyCon, word32PrimTy,
int64PrimTyCon, int64PrimTy,
- word64PrimTyCon, word64PrimTy
+ word64PrimTyCon, word64PrimTy,
+
+ anyPrimTyCon, anyPrimTy, anyPrimTyCon1, mkAnyPrimTyCon
) where
#include "HsVersions.h"
import Var ( TyVar, mkTyVar )
import Name ( Name, BuiltInSyntax(..), mkInternalName, mkWiredInName )
import OccName ( mkOccNameFS, tcName, mkTyVarOcc )
-import TyCon ( TyCon, ArgVrcs, mkPrimTyCon, mkLiftedPrimTyCon,
+import TyCon ( TyCon, mkPrimTyCon, mkLiftedPrimTyCon,
PrimRep(..) )
import Type ( mkTyConApp, mkTyConTy, mkTyVarTys, mkTyVarTy,
- unliftedTypeKind, liftedTypeKind, openTypeKind,
- Kind, mkArrowKinds,
+ unliftedTypeKind,
+ liftedTypeKind, openTypeKind,
+ Kind, mkArrowKinds, mkArrowKind,
TyThing(..)
)
-import SrcLoc ( noSrcLoc )
-import Unique ( mkAlphaTyVarUnique )
+import SrcLoc
+import Unique ( mkAlphaTyVarUnique, pprUnique )
import PrelNames
-import FastString ( FastString, mkFastString )
+import StaticFlags
+import FastString
import Outputable
import Char ( ord, chr )
, wordPrimTyCon
, word32PrimTyCon
, word64PrimTyCon
+ , anyPrimTyCon, anyPrimTyCon1
]
mkPrimTc :: FastString -> Unique -> TyCon -> Name
mkPrimTc fs uniq tycon
= mkWiredInName gHC_PRIM (mkOccNameFS tcName fs)
uniq
- Nothing -- No parent object
(ATyCon tycon) -- Relevant TyCon
UserSyntax -- None are built-in syntax
bcoPrimTyConName = mkPrimTc FSLIT("BCO#") bcoPrimTyConKey bcoPrimTyCon
weakPrimTyConName = mkPrimTc FSLIT("Weak#") weakPrimTyConKey weakPrimTyCon
threadIdPrimTyConName = mkPrimTc FSLIT("ThreadId#") threadIdPrimTyConKey threadIdPrimTyCon
+anyPrimTyConName = mkPrimTc FSLIT("Any") anyPrimTyConKey anyPrimTyCon
+anyPrimTyCon1Name = mkPrimTc FSLIT("Any1") anyPrimTyCon1Key anyPrimTyCon
\end{code}
%************************************************************************
tyVarList :: Kind -> [TyVar]
tyVarList kind = [ mkTyVar (mkInternalName (mkAlphaTyVarUnique u)
(mkTyVarOcc (mkFastString name))
- noSrcLoc) kind
+ noSrcSpan) kind
| u <- [2..],
let name | c <= 'z' = [c]
| otherwise = 't':show u
-- to a lifted or unlifted type variable. It's used for the
-- result type for "error", so that we can have (error Int# "Help")
openAlphaTyVars :: [TyVar]
-openAlphaTyVars@(openAlphaTyVar:_) = tyVarList openTypeKind
+openAlphaTyVars@(openAlphaTyVar:openBetaTyVar:_) = tyVarList openTypeKind
openAlphaTy = mkTyVarTy openAlphaTyVar
-
-vrcPos,vrcZero :: (Bool,Bool)
-vrcPos = (True,False)
-vrcZero = (False,False)
-
-vrcsP,vrcsZ,vrcsZP :: ArgVrcs
-vrcsP = [vrcPos]
-vrcsZ = [vrcZero]
-vrcsZP = [vrcZero,vrcPos]
+openBetaTy = mkTyVarTy openBetaTyVar
\end{code}
\begin{code}
-- only used herein
-pcPrimTyCon :: Name -> ArgVrcs -> PrimRep -> TyCon
-pcPrimTyCon name arg_vrcs rep
- = mkPrimTyCon name kind arity arg_vrcs rep
+pcPrimTyCon :: Name -> Int -> PrimRep -> TyCon
+pcPrimTyCon name arity rep
+ = mkPrimTyCon name kind arity rep
where
- arity = length arg_vrcs
kind = mkArrowKinds (replicate arity liftedTypeKind) result_kind
- result_kind = unliftedTypeKind -- all primitive types are unlifted
+ result_kind = unliftedTypeKind
pcPrimTyCon0 :: Name -> PrimRep -> TyCon
pcPrimTyCon0 name rep
- = mkPrimTyCon name result_kind 0 [] rep
+ = mkPrimTyCon name result_kind 0 rep
where
- result_kind = unliftedTypeKind -- all primitive types are unlifted
+ result_kind = unliftedTypeKind
charPrimTy = mkTyConTy charPrimTyCon
charPrimTyCon = pcPrimTyCon0 charPrimTyConName WordRep
\begin{code}
mkStatePrimTy ty = mkTyConApp statePrimTyCon [ty]
-statePrimTyCon = pcPrimTyCon statePrimTyConName vrcsZ VoidRep
+statePrimTyCon = pcPrimTyCon statePrimTyConName 1 VoidRep
\end{code}
RealWorld is deeply magical. It is *primitive*, but it is not
RealWorld; it's only used in the type system, to parameterise State#.
\begin{code}
-realWorldTyCon = mkLiftedPrimTyCon realWorldTyConName liftedTypeKind 0 [] PtrRep
+realWorldTyCon = mkLiftedPrimTyCon realWorldTyConName liftedTypeKind 0 PtrRep
realWorldTy = mkTyConTy realWorldTyCon
realWorldStatePrimTy = mkStatePrimTy realWorldTy -- State# RealWorld
\end{code}
%************************************************************************
%* *
+ Any
+%* *
+%************************************************************************
+
+The type constructor Any is type to which you can unsafely coerce any
+lifted type, and back.
+
+ * It is lifted, and hence represented by a pointer
+
+ * It does not claim to be a *data* type, and that's important for
+ the code generator, because the code gen may *enter* a data value
+ but never enters a function value.
+
+It's also used to instantiate un-constrained type variables after type
+checking. For example
+ length Any []
+Annoyingly, we sometimes need Anys of other kinds, such as (*->*) etc.
+This is a bit like tuples. We define a couple of useful ones here,
+and make others up on the fly. If any of these others end up being exported
+into interface files, we'll get a crash; at least until we add interface-file
+syntax to support them.
+
+\begin{code}
+anyPrimTy = mkTyConApp anyPrimTyCon []
+
+anyPrimTyCon :: TyCon -- Kind *
+anyPrimTyCon = mkLiftedPrimTyCon anyPrimTyConName liftedTypeKind 0 PtrRep
+
+anyPrimTyCon1 :: TyCon -- Kind *->*
+anyPrimTyCon1 = mkLiftedPrimTyCon anyPrimTyCon1Name kind 0 PtrRep
+ where
+ kind = mkArrowKind liftedTypeKind liftedTypeKind
+
+mkAnyPrimTyCon :: Unique -> Kind -> TyCon
+-- Grotesque hack alert: the client gives the unique; so equality won't work
+mkAnyPrimTyCon uniq kind
+ = WARN( opt_PprStyle_Debug, ptext SLIT("Urk! Inventing strangely-kinded Any TyCon:") <+> ppr uniq <+> ppr kind )
+ -- See Note [Strangely-kinded void TyCons] in TcHsSyn
+ tycon
+ where
+ name = mkPrimTc (mkFastString ("Any" ++ showSDoc (pprUnique uniq))) uniq tycon
+ tycon = mkLiftedPrimTyCon name kind 0 PtrRep
+\end{code}
+
+
+%************************************************************************
+%* *
\subsection[TysPrim-arrays]{The primitive array types}
%* *
%************************************************************************
\begin{code}
-arrayPrimTyCon = pcPrimTyCon arrayPrimTyConName vrcsP PtrRep
-mutableArrayPrimTyCon = pcPrimTyCon mutableArrayPrimTyConName vrcsZP PtrRep
-mutableByteArrayPrimTyCon = pcPrimTyCon mutableByteArrayPrimTyConName vrcsZ PtrRep
-byteArrayPrimTyCon = pcPrimTyCon0 byteArrayPrimTyConName PtrRep
+arrayPrimTyCon = pcPrimTyCon arrayPrimTyConName 1 PtrRep
+mutableArrayPrimTyCon = pcPrimTyCon mutableArrayPrimTyConName 2 PtrRep
+mutableByteArrayPrimTyCon = pcPrimTyCon mutableByteArrayPrimTyConName 1 PtrRep
+byteArrayPrimTyCon = pcPrimTyCon0 byteArrayPrimTyConName PtrRep
mkArrayPrimTy elt = mkTyConApp arrayPrimTyCon [elt]
byteArrayPrimTy = mkTyConTy byteArrayPrimTyCon
%************************************************************************
\begin{code}
-mutVarPrimTyCon = pcPrimTyCon mutVarPrimTyConName vrcsZP PtrRep
+mutVarPrimTyCon = pcPrimTyCon mutVarPrimTyConName 2 PtrRep
mkMutVarPrimTy s elt = mkTyConApp mutVarPrimTyCon [s, elt]
\end{code}
%************************************************************************
\begin{code}
-mVarPrimTyCon = pcPrimTyCon mVarPrimTyConName vrcsZP PtrRep
+mVarPrimTyCon = pcPrimTyCon mVarPrimTyConName 2 PtrRep
mkMVarPrimTy s elt = mkTyConApp mVarPrimTyCon [s, elt]
\end{code}
%************************************************************************
\begin{code}
-tVarPrimTyCon = pcPrimTyCon tVarPrimTyConName vrcsZP PtrRep
+tVarPrimTyCon = pcPrimTyCon tVarPrimTyConName 2 PtrRep
mkTVarPrimTy s elt = mkTyConApp tVarPrimTyCon [s, elt]
\end{code}
%************************************************************************
\begin{code}
-stablePtrPrimTyCon = pcPrimTyCon stablePtrPrimTyConName vrcsP AddrRep
+stablePtrPrimTyCon = pcPrimTyCon stablePtrPrimTyConName 1 AddrRep
mkStablePtrPrimTy ty = mkTyConApp stablePtrPrimTyCon [ty]
\end{code}
%************************************************************************
\begin{code}
-stableNamePrimTyCon = pcPrimTyCon stableNamePrimTyConName vrcsP PtrRep
+stableNamePrimTyCon = pcPrimTyCon stableNamePrimTyConName 1 PtrRep
mkStableNamePrimTy ty = mkTyConApp stableNamePrimTyCon [ty]
\end{code}
%************************************************************************
\begin{code}
-weakPrimTyCon = pcPrimTyCon weakPrimTyConName vrcsP PtrRep
+weakPrimTyCon = pcPrimTyCon weakPrimTyConName 1 PtrRep
mkWeakPrimTy v = mkTyConApp weakPrimTyCon [v]
\end{code}
projects / ghc-hetmet.git / blobdiff