X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FhsSyn%2FHsBinds.lhs;h=f2da8bfef7b39e692ad2f053154f926cbfaab282;hp=41097d888ee73d88f367cb2b350b1be7ee444dfc;hb=367b0590cc0d8ba3d1561c85b366a183b8a71d24;hpb=d5934bbb856aa0aa620c9b2e0fa51c90a1a5a048

diff --git a/compiler/hsSyn/HsBinds.lhs b/compiler/hsSyn/HsBinds.lhs
index 41097d8..f2da8bf 100644
--- a/compiler/hsSyn/HsBinds.lhs
+++ b/compiler/hsSyn/HsBinds.lhs
@@ -52,7 +52,9 @@ data HsValBinds id	-- Value bindings (not implicit parameters)
 					-- Recursive by default
 
   | ValBindsOut				-- After renaming
-	[(RecFlag, LHsBinds id)]	-- Dependency analysed
+	[(RecFlag, LHsBinds id)]	-- Dependency analysed, later bindings 
+                                        -- in the list may depend on earlier
+                                        -- ones.
 	[LSig Name]
 
 type LHsBinds id  = Bag (LHsBind id)
@@ -93,7 +95,7 @@ data HsBind id
 				-- Before renaming, and after typechecking, 
 				-- the field is unused; it's just an error thunk
 
-        fun_tick :: Maybe Int   -- This is the (optional) module-local tick number. 
+        fun_tick :: Maybe (Int,[id])   -- This is the (optional) module-local tick number. 
     }
 
   | PatBind {	-- The pattern is never a simple variable;
@@ -112,7 +114,7 @@ data HsBind id
   | AbsBinds {					-- Binds abstraction; TRANSLATION
 	abs_tvs     :: [TyVar],  
 	abs_dicts   :: [DictId],
-	abs_exports :: [([TyVar], id, id, [Prag])],	-- (tvs, poly_id, mono_id, prags)
+	abs_exports :: [([TyVar], id, id, [LPrag])],	-- (tvs, poly_id, mono_id, prags)
 	abs_binds   :: LHsBinds id		-- The dictionary bindings and typechecked user bindings
 						-- mixed up together; you can tell the dict bindings because
 						-- they are all VarBinds
@@ -383,26 +385,38 @@ serves for both.
 \begin{code}
 type LSig name = Located (Sig name)
 
-data Sig name
-  = TypeSig	(Located name)	-- A bog-std type signature
+data Sig name	-- Signatures and pragmas
+  = 	-- An ordinary type signature
+	-- f :: Num a => a -> a
+    TypeSig	(Located name)	-- A bog-std type signature
 		(LHsType name)
 
-  | SpecSig 	(Located name)	-- Specialise a function or datatype ...
-		(LHsType name)	-- ... to these types
-		InlineSpec
+	-- An ordinary fixity declaration
+	--	infixl *** 8
+  | FixSig	(FixitySig name)	-- Fixity declaration
 
+	-- An inline pragma
+	-- {#- INLINE f #-}
   | InlineSig	(Located name)	-- Function name
 		InlineSpec
 
+	-- A specialisation pragma
+	-- {-# SPECIALISE f :: Int -> Int #-}
+  | SpecSig 	(Located name)	-- Specialise a function or datatype ...
+		(LHsType name)	-- ... to these types
+		InlineSpec
+
+	-- A specialisation pragma for instance declarations only
+	-- {-# SPECIALISE instance Eq [Int] #-}
   | SpecInstSig (LHsType name)	-- (Class tys); should be a specialisation of the 
 				-- current instance decl
 
-  | FixSig	(FixitySig name)	-- Fixity declaration
 
 type LFixitySig name = Located (FixitySig name)
 data FixitySig name = FixitySig (Located name) Fixity 
 
 -- A Prag conveys pragmas from the type checker to the desugarer
+type LPrag = Located Prag
 data Prag 
   = InlinePrag 
 	InlineSpec
@@ -411,13 +425,15 @@ data Prag
 	(HsExpr Id)	-- An expression, of the given specialised type, which
 	PostTcType 	-- specialises the polymorphic function
 	[Id]		-- Dicts mentioned free in the expression
+			--   Apr07: I think this is pretty useless
+			--	    see Note [Const rule dicts] in DsBinds
 	InlineSpec 	-- Inlining spec for the specialised function
 
 isInlinePrag (InlinePrag _) = True
 isInlinePrag prag	    = False
 
-isSpecPrag (SpecPrag _ _ _ _) = True
-isSpecPrag prag		      = False
+isSpecPrag (SpecPrag {}) = True
+isSpecPrag prag		 = False
 \end{code}
 
 \begin{code}
@@ -526,7 +542,7 @@ pprVarSig var ty = sep [ppr var <+> dcolon, nest 2 (ppr ty)]
 pprSpec :: (Outputable id, Outputable ty) => id -> ty -> InlineSpec -> SDoc
 pprSpec var ty inl = sep [ptext SLIT("SPECIALIZE") <+> ppr inl <+> pprVarSig var ty]
 
-pprPrag :: Outputable id => id -> Prag -> SDoc
-pprPrag var (InlinePrag inl)         = ppr inl <+> ppr var
-pprPrag var (SpecPrag expr ty _ inl) = pprSpec var ty inl
+pprPrag :: Outputable id => id -> LPrag -> SDoc
+pprPrag var (L _ (InlinePrag inl))         = ppr inl <+> ppr var
+pprPrag var (L _ (SpecPrag expr ty _ inl)) = pprSpec var ty inl
 \end{code}