X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FhsSyn%2FHsDecls.lhs;h=9543cadfca61366620e0dc556e65ef7e7e71d594;hb=3ad8f84f6a75f240383e62a14472d14eb372dcd1;hp=2128ad399f4659c9eeb88d9c3a4cf59cf4c2c4ee;hpb=5537ba01a8cd93ea209ef67f3431d9f5f9cd9d34;p=ghc-hetmet.git

diff --git a/compiler/hsSyn/HsDecls.lhs b/compiler/hsSyn/HsDecls.lhs
index 2128ad3..9543cad 100644
--- a/compiler/hsSyn/HsDecls.lhs
+++ b/compiler/hsSyn/HsDecls.lhs
@@ -9,7 +9,7 @@ Definitions for: @TyDecl@ and @oCnDecl@, @ClassDecl@,
 \begin{code}
 module HsDecls (
 	HsDecl(..), LHsDecl, TyClDecl(..), LTyClDecl, 
-	InstDecl(..), LInstDecl, NewOrData(..),
+	InstDecl(..), LInstDecl, DerivDecl(..), LDerivDecl, NewOrData(..),
 	RuleDecl(..), LRuleDecl, RuleBndr(..),
 	DefaultDecl(..), LDefaultDecl, SpliceDecl(..),
 	ForeignDecl(..), LForeignDecl, ForeignImport(..), ForeignExport(..),
@@ -67,6 +67,7 @@ type LHsDecl id = Located (HsDecl id)
 data HsDecl id
   = TyClD	(TyClDecl id)
   | InstD	(InstDecl  id)
+  | DerivD      (DerivDecl id)
   | ValD	(HsBind id)
   | SigD	(Sig id)
   | DefD	(DefaultDecl id)
@@ -95,6 +96,7 @@ data HsGroup id
 	hs_valds  :: HsValBinds id,
 	hs_tyclds :: [LTyClDecl id],
 	hs_instds :: [LInstDecl id],
+        hs_derivds :: [LDerivDecl id],
 
 	hs_fixds  :: [LFixitySig id],
 		-- Snaffled out of both top-level fixity signatures,
@@ -110,7 +112,7 @@ emptyGroup, emptyRdrGroup, emptyRnGroup :: HsGroup a
 emptyRdrGroup = emptyGroup { hs_valds = emptyValBindsIn }
 emptyRnGroup  = emptyGroup { hs_valds = emptyValBindsOut }
 
-emptyGroup = HsGroup { hs_tyclds = [], hs_instds = [],
+emptyGroup = HsGroup { hs_tyclds = [], hs_instds = [], hs_derivds = [],
 		       hs_fixds = [], hs_defds = [], hs_fords = [], 
 		       hs_depds = [], hs_ruleds = [],
 		       hs_valds = error "emptyGroup hs_valds: Can't happen" }
@@ -121,6 +123,7 @@ appendGroups
 	hs_valds  = val_groups1,
 	hs_tyclds = tyclds1, 
 	hs_instds = instds1,
+        hs_derivds = derivds1,
 	hs_fixds  = fixds1, 
 	hs_defds  = defds1,
 	hs_fords  = fords1, 
@@ -130,6 +133,7 @@ appendGroups
 	hs_valds  = val_groups2,
 	hs_tyclds = tyclds2, 
 	hs_instds = instds2,
+        hs_derivds = derivds2,
 	hs_fixds  = fixds2, 
 	hs_defds  = defds2,
 	hs_fords  = fords2, 
@@ -140,6 +144,7 @@ appendGroups
 	hs_valds  = val_groups1 `plusHsValBinds` val_groups2,
 	hs_tyclds = tyclds1 ++ tyclds2, 
 	hs_instds = instds1 ++ instds2,
+        hs_derivds = derivds1 ++ derivds2,
 	hs_fixds  = fixds1 ++ fixds2, 
 	hs_defds  = defds1 ++ defds2,
 	hs_fords  = fords1 ++ fords2, 
@@ -153,6 +158,7 @@ instance OutputableBndr name => Outputable (HsDecl name) where
     ppr (ValD binds) = ppr binds
     ppr (DefD def)   = ppr def
     ppr (InstD inst) = ppr inst
+    ppr (DerivD deriv) = ppr deriv
     ppr (ForD fd)    = ppr fd
     ppr (SigD sd)    = ppr sd
     ppr (RuleD rd)   = ppr rd
@@ -163,6 +169,7 @@ instance OutputableBndr name => Outputable (HsGroup name) where
     ppr (HsGroup { hs_valds  = val_decls,
 		   hs_tyclds = tycl_decls,
 		   hs_instds = inst_decls,
+                   hs_derivds = deriv_decls,
 		   hs_fixds  = fix_decls,
 		   hs_depds  = deprec_decls,
 		   hs_fords  = foreign_decls,
@@ -172,6 +179,7 @@ instance OutputableBndr name => Outputable (HsGroup name) where
 		ppr_ds deprec_decls, ppr_ds rule_decls,
 		ppr val_decls,
 		ppr_ds tycl_decls, ppr_ds inst_decls,
+                ppr_ds deriv_decls,
 		ppr_ds foreign_decls]
 	where
 	  ppr_ds [] = empty
@@ -715,6 +723,23 @@ instDeclATs (InstDecl _ _ _ ats) = ats
 
 %************************************************************************
 %*									*
+\subsection[DerivDecl]{A stand-alone instance deriving declaration
+%*									*
+%************************************************************************
+
+\begin{code}
+type LDerivDecl name = Located (DerivDecl name)
+
+data DerivDecl name
+  = DerivDecl (LHsType name) (Located name)
+
+instance (OutputableBndr name) => Outputable (DerivDecl name) where
+    ppr (DerivDecl ty n) 
+        = hsep [ptext SLIT("deriving"), ppr ty, ptext SLIT("for"), ppr n]
+\end{code}
+
+%************************************************************************
+%*									*
 \subsection[DefaultDecl]{A @default@ declaration}
 %*									*
 %************************************************************************