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-rw-r--r--haddock-api/src/Haddock/Interface/Specialize.hs16
1 files changed, 11 insertions, 5 deletions
diff --git a/haddock-api/src/Haddock/Interface/Specialize.hs b/haddock-api/src/Haddock/Interface/Specialize.hs
index 66627c15..28806f04 100644
--- a/haddock-api/src/Haddock/Interface/Specialize.hs
+++ b/haddock-api/src/Haddock/Interface/Specialize.hs
@@ -178,19 +178,25 @@ parseTupleArity _ = Nothing
-- not converted to 'String' or alike to avoid new allocations. Additionally,
-- since it is stored mostly in 'Set', fast comparison of 'FastString' is also
-- quite nice.
-type NameRep = FastString
+newtype NameRep
+ = NameRep FastString
+ deriving (Eq)
+
+instance Ord NameRep where
+ compare (NameRep fs1) (NameRep fs2) = uniqCompareFS fs1 fs2
+
getNameRep :: NamedThing name => name -> NameRep
-getNameRep = getOccFS
+getNameRep = NameRep . getOccFS
nameRepString :: NameRep -> String
-nameRepString = unpackFS
+nameRepString (NameRep fs) = unpackFS fs
stringNameRep :: String -> NameRep
-stringNameRep = mkFastString
+stringNameRep = NameRep . mkFastString
setInternalNameRep :: SetName name => NameRep -> name -> name
-setInternalNameRep = setInternalOccName . mkVarOccFS
+setInternalNameRep (NameRep fs) = setInternalOccName (mkVarOccFS fs)
setInternalOccName :: SetName name => OccName -> name -> name
setInternalOccName occ name =