If compiled without \tr{#define COMPILING_GHC}, you get
(part of) a Haskell-abstract-syntax library. With it,
you get part of GHC.
-[OLD COMMENT -- SOF 7/97]
\begin{code}
-#include "HsVersions.h"
-
module HsTypes (
HsType(..), HsTyVar(..),
- SYN_IE(Context), SYN_IE(ClassAssertion)
+ Context, ClassAssertion
, mkHsForAllTy
, getTyVarName, replaceTyVarName
, pprParendHsType
- , pprContext
- , cmpHsType, cmpContext
+ , pprContext, pprClassAssertion
+ , cmpHsType, cmpHsTypes, cmpContext
) where
-IMP_Ubiq()
+#include "HsVersions.h"
-import CmdLineOpts ( opt_PprUserLength )
-import Outputable ( Outputable(..), PprStyle(..), pprQuote, interppSP )
+import Outputable
import Kind ( Kind {- instance Outputable -} )
import Name ( nameOccName )
-import Pretty
-import Util ( thenCmp, cmpList, isIn, panic# )
+import Util ( thenCmp, cmpList, isIn, panic )
+import GlaExts ( Int#, (<#) )
\end{code}
This is the syntax for types as seen in type signatures.
\begin{code}
type Context name = [ClassAssertion name]
-type ClassAssertion name = (name, HsType name)
+type ClassAssertion name = (name, [HsType name])
-- The type is usually a type variable, but it
-- doesn't have to be when reading interface files
-- these next two are only used in unfoldings in interfaces
| MonoDictTy name -- Class
- (HsType name)
+ [HsType name]
mkHsForAllTy [] [] ty = ty
mkHsForAllTy tvs ctxt ty = HsForAllTy tvs ctxt ty
\begin{code}
instance (Outputable name) => Outputable (HsType name) where
- ppr sty ty = pprQuote sty $ \ sty -> pprHsType sty ty
+ ppr ty = pprHsType ty
instance (Outputable name) => Outputable (HsTyVar name) where
- ppr sty (UserTyVar name) = ppr sty name
- ppr sty (IfaceTyVar name kind) = pprQuote sty $ \ sty ->
- hsep [ppr sty name, ptext SLIT("::"), ppr sty kind]
+ ppr (UserTyVar name) = ppr name
+ ppr (IfaceTyVar name kind) = hsep [ppr name, ptext SLIT("::"), ppr kind]
-ppr_forall sty ctxt_prec [] [] ty
- = ppr_mono_ty sty ctxt_prec ty
-ppr_forall sty ctxt_prec tvs ctxt ty
+ppr_forall ctxt_prec [] [] ty
+ = ppr_mono_ty ctxt_prec ty
+ppr_forall ctxt_prec tvs ctxt ty
= maybeParen (ctxt_prec >= pREC_FUN) $
- sep [ptext SLIT("_forall_"), brackets (interppSP sty tvs),
- pprContext sty ctxt, ptext SLIT("=>"),
- pprHsType sty ty]
-
-pprContext :: (Outputable name) => PprStyle -> (Context name) -> Doc
-pprContext sty [] = empty
-pprContext sty context
- = pprQuote sty $ \ sty -> parens (hsep (punctuate comma (map ppr_assert context)))
- where
- ppr_assert (clas, ty) = hsep [ppr sty clas, ppr sty ty]
+ sep [ptext SLIT("_forall_"), brackets (interppSP tvs),
+ pprContext ctxt, ptext SLIT("=>"),
+ pprHsType ty]
+
+pprContext :: (Outputable name) => Context name -> SDoc
+pprContext [] = empty
+pprContext context = parens (hsep (punctuate comma (map pprClassAssertion context)))
+
+pprClassAssertion :: (Outputable name) => ClassAssertion name -> SDoc
+pprClassAssertion (clas, tys)
+ = ppr clas <+> hsep (map ppr tys)
\end{code}
\begin{code}
pREC_FUN = (1 :: Int)
pREC_CON = (2 :: Int)
-maybeParen :: Bool -> Doc -> Doc
+maybeParen :: Bool -> SDoc -> SDoc
maybeParen True p = parens p
maybeParen False p = p
-- printing works more-or-less as for Types
-pprHsType, pprParendHsType :: (Outputable name) => PprStyle -> HsType name -> Doc
+pprHsType, pprParendHsType :: (Outputable name) => HsType name -> SDoc
-pprHsType sty ty = ppr_mono_ty sty pREC_TOP ty
-pprParendHsType sty ty = ppr_mono_ty sty pREC_CON ty
+pprHsType ty = ppr_mono_ty pREC_TOP ty
+pprParendHsType ty = ppr_mono_ty pREC_CON ty
-ppr_mono_ty sty ctxt_prec (HsPreForAllTy ctxt ty) = ppr_forall sty ctxt_prec [] ctxt ty
-ppr_mono_ty sty ctxt_prec (HsForAllTy tvs ctxt ty) = ppr_forall sty ctxt_prec tvs ctxt ty
+ppr_mono_ty ctxt_prec (HsPreForAllTy ctxt ty) = ppr_forall ctxt_prec [] ctxt ty
+ppr_mono_ty ctxt_prec (HsForAllTy tvs ctxt ty) = ppr_forall ctxt_prec tvs ctxt ty
-ppr_mono_ty sty ctxt_prec (MonoTyVar name) = ppr sty name
+ppr_mono_ty ctxt_prec (MonoTyVar name) = ppr name
-ppr_mono_ty sty ctxt_prec (MonoFunTy ty1 ty2)
- = let p1 = ppr_mono_ty sty pREC_FUN ty1
- p2 = ppr_mono_ty sty pREC_TOP ty2
+ppr_mono_ty ctxt_prec (MonoFunTy ty1 ty2)
+ = let p1 = ppr_mono_ty pREC_FUN ty1
+ p2 = ppr_mono_ty pREC_TOP ty2
in
maybeParen (ctxt_prec >= pREC_FUN)
(sep [p1, (<>) (ptext SLIT("-> ")) p2])
-ppr_mono_ty sty ctxt_prec (MonoTupleTy _ tys)
- = parens (sep (punctuate comma (map (ppr sty) tys)))
+ppr_mono_ty ctxt_prec (MonoTupleTy _ tys)
+ = parens (sep (punctuate comma (map ppr tys)))
-ppr_mono_ty sty ctxt_prec (MonoListTy _ ty)
- = brackets (ppr_mono_ty sty pREC_TOP ty)
+ppr_mono_ty ctxt_prec (MonoListTy _ ty)
+ = brackets (ppr_mono_ty pREC_TOP ty)
-ppr_mono_ty sty ctxt_prec (MonoTyApp fun_ty arg_ty)
+ppr_mono_ty ctxt_prec (MonoTyApp fun_ty arg_ty)
= maybeParen (ctxt_prec >= pREC_CON)
- (hsep [ppr_mono_ty sty pREC_FUN fun_ty, ppr_mono_ty sty pREC_CON arg_ty])
+ (hsep [ppr_mono_ty pREC_FUN fun_ty, ppr_mono_ty pREC_CON arg_ty])
-ppr_mono_ty sty ctxt_prec (MonoDictTy clas ty)
- = hsep [ppr sty clas, ppr_mono_ty sty pREC_CON ty]
+ppr_mono_ty ctxt_prec (MonoDictTy clas tys)
+ = ppr clas <+> hsep (map (ppr_mono_ty pREC_CON) tys)
\end{code}
wrong}, so be careful!
\begin{code}
-cmpHsTyVar :: (a -> a -> TAG_) -> HsTyVar a -> HsTyVar a -> TAG_
---cmpHsType :: (a -> a -> TAG_) -> HsType a -> HsType a -> TAG_
---cmpContext :: (a -> a -> TAG_) -> Context a -> Context a -> TAG_
+cmpHsTyVar :: (a -> a -> Ordering) -> HsTyVar a -> HsTyVar a -> Ordering
+cmpHsType :: (a -> a -> Ordering) -> HsType a -> HsType a -> Ordering
+cmpHsTypes :: (a -> a -> Ordering) -> [HsType a] -> [HsType a] -> Ordering
+cmpContext :: (a -> a -> Ordering) -> Context a -> Context a -> Ordering
cmpHsTyVar cmp (UserTyVar v1) (UserTyVar v2) = v1 `cmp` v2
cmpHsTyVar cmp (IfaceTyVar v1 _) (IfaceTyVar v2 _) = v1 `cmp` v2
-cmpHsTyVar cmp (UserTyVar _) other = LT_
-cmpHsTyVar cmp other1 other2 = GT_
+cmpHsTyVar cmp (UserTyVar _) other = LT
+cmpHsTyVar cmp other1 other2 = GT
+
+cmpHsTypes cmp [] [] = EQ
+cmpHsTypes cmp [] tys2 = LT
+cmpHsTypes cmp tys1 [] = GT
+cmpHsTypes cmp (ty1:tys1) (ty2:tys2) = cmpHsType cmp ty1 ty2 `thenCmp` cmpHsTypes cmp tys1 tys2
-- We assume that HsPreForAllTys have been smashed by now.
# ifdef DEBUG
-cmpHsType _ (HsPreForAllTy _ _) _ = panic# "cmpHsType:HsPreForAllTy:1st arg"
-cmpHsType _ _ (HsPreForAllTy _ _) = panic# "cmpHsType:HsPreForAllTy:2nd arg"
+cmpHsType _ (HsPreForAllTy _ _) _ = panic "cmpHsType:HsPreForAllTy:1st arg"
+cmpHsType _ _ (HsPreForAllTy _ _) = panic "cmpHsType:HsPreForAllTy:2nd arg"
# endif
cmpHsType cmp (HsForAllTy tvs1 c1 t1) (HsForAllTy tvs2 c2 t2)
cmpHsType cmp (MonoFunTy a1 b1) (MonoFunTy a2 b2)
= cmpHsType cmp a1 a2 `thenCmp` cmpHsType cmp b1 b2
-cmpHsType cmp (MonoDictTy c1 ty1) (MonoDictTy c2 ty2)
- = cmp c1 c2 `thenCmp` cmpHsType cmp ty1 ty2
+cmpHsType cmp (MonoDictTy c1 tys1) (MonoDictTy c2 tys2)
+ = cmp c1 c2 `thenCmp` cmpHsTypes cmp tys1 tys2
cmpHsType cmp ty1 ty2 -- tags must be different
= let tag1 = tag ty1
tag2 = tag ty2
in
- if tag1 _LT_ tag2 then LT_ else GT_
+ if tag1 _LT_ tag2 then LT else GT
where
tag (MonoTyVar n1) = (ILIT(1) :: FAST_INT)
tag (MonoTupleTy _ tys1) = ILIT(2)
tag (MonoListTy _ ty1) = ILIT(3)
tag (MonoTyApp tc1 tys1) = ILIT(4)
tag (MonoFunTy a1 b1) = ILIT(5)
- tag (MonoDictTy c1 ty1) = ILIT(7)
+ tag (MonoDictTy c1 tys1) = ILIT(7)
tag (HsForAllTy _ _ _) = ILIT(8)
tag (HsPreForAllTy _ _) = ILIT(9)
cmpContext cmp a b
= cmpList cmp_ctxt a b
where
- cmp_ctxt (c1, ty1) (c2, ty2)
- = cmp c1 c2 `thenCmp` cmpHsType cmp ty1 ty2
+ cmp_ctxt (c1, tys1) (c2, tys2)
+ = cmp c1 c2 `thenCmp` cmpHsTypes cmp tys1 tys2
\end{code}
projects / ghc-hetmet.git / blobdiff