Remove code that is dead now that we need >= 6.12 to build

[ghc-hetmet.git] / compiler / basicTypes / OccName.lhs

diff --git a/compiler/basicTypes/OccName.lhs b/compiler/basicTypes/OccName.lhs
index 8248b5f..439a2f8 100644 (file)
--- a/compiler/basicTypes/OccName.lhs
+++ b/compiler/basicTypes/OccName.lhs
@@ -92,6 +92,8 @@ module OccName (
        startsVarSym, startsVarId, startsConSym, startsConId
     ) where
 
+#include "Typeable.h"
+
 import Util
 import Unique
 import BasicTypes
@@ -100,17 +102,9 @@ import UniqSet
 import FastString
 import Outputable
 import Binary
+import StaticFlags( opt_SuppressUniques )
 import Data.Char
-\end{code}
-
-\begin{code}
--- Unicode TODO: put isSymbol in libcompat
-#if !defined(__GLASGOW_HASKELL__) || __GLASGOW_HASKELL__ > 604
-#else
-isSymbol :: a -> Bool
-isSymbol = const False
-#endif
-
+import Data.Data
 \end{code}
 
 %************************************************************************
@@ -226,6 +220,14 @@ instance Ord OccName where
        -- Compares lexicographically, *not* by Unique of the string
     compare (OccName sp1 s1) (OccName sp2 s2) 
        = (s1  `compare` s2) `thenCmp` (sp1 `compare` sp2)
+
+INSTANCE_TYPEABLE0(OccName,occNameTc,"OccName")
+
+instance Data OccName where
+  -- don't traverse?
+  toConstr _   = abstractConstr "OccName"
+  gunfold _ _  = error "gunfold"
+  dataTypeOf _ = mkNoRepType "OccName"
 \end{code}
 
 
@@ -243,12 +245,26 @@ pprOccName :: OccName -> SDoc
 pprOccName (OccName sp occ) 
   = getPprStyle $ \ sty ->
     if codeStyle sty 
-       then ftext (zEncodeFS occ)
-       else ftext occ <> if debugStyle sty 
-                           then braces (pprNameSpaceBrief sp)
-                           else empty
+    then ftext (zEncodeFS occ)
+    else pp_occ <> pp_debug sty
+  where
+    pp_debug sty | debugStyle sty = braces (pprNameSpaceBrief sp)
+                | otherwise      = empty
+
+    pp_occ | opt_SuppressUniques = text (strip_th_unique (unpackFS occ))
+           | otherwise           = ftext occ
+
+       -- See Note [Suppressing uniques in OccNames]
+    strip_th_unique ('[' : c : _) | isAlphaNum c = []
+    strip_th_unique (c : cs) = c : strip_th_unique cs
+    strip_th_unique []       = []
 \end{code}
 
+Note [Suppressing uniques in OccNames]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+This is a hack to de-wobblify the OccNames that contain uniques from
+Template Haskell that have been turned into a string in the OccName.
+See Note [Unique OccNames from Template Haskell] in Convert.hs
 
 %************************************************************************
 %*                                                                     *