diff options
Diffstat (limited to 'haddock-api/src/Haddock')
| -rw-r--r-- | haddock-api/src/Haddock/Interface/AttachInstances.hs | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/haddock-api/src/Haddock/Interface/AttachInstances.hs b/haddock-api/src/Haddock/Interface/AttachInstances.hs index 6ef0ed19..d5b80888 100644 --- a/haddock-api/src/Haddock/Interface/AttachInstances.hs +++ b/haddock-api/src/Haddock/Interface/AttachInstances.hs @@ -179,19 +179,28 @@ findFixity iface ifaceMap instIfaceMap = \name -> -- Collecting and sorting instances -------------------------------------------------------------------------------- +-- | Stable name for stable comparisons. GHC's `Name` uses unstable +-- ordering based on their `Unique`'s. +newtype SName = SName Name + +instance Eq SName where + SName n1 == SName n2 = n1 `stableNameCmp` n2 == EQ + +instance Ord SName where + SName n1 `compare` SName n2 = n1 `stableNameCmp` n2 -- | Simplified type for sorting types, ignoring qualification (not visible -- in Haddock output) and unifying special tycons with normal ones. -- For the benefit of the user (looks nice and predictable) and the -- tests (which prefer output to be deterministic). -data SimpleType = SimpleType Name [SimpleType] +data SimpleType = SimpleType SName [SimpleType] | SimpleTyLit TyLit deriving (Eq,Ord) -instHead :: ([TyVar], [PredType], Class, [Type]) -> ([Int], Name, [SimpleType]) +instHead :: ([TyVar], [PredType], Class, [Type]) -> ([Int], SName, [SimpleType]) instHead (_, _, cls, args) - = (map argCount args, className cls, map simplify args) + = (map argCount args, SName (className cls), map simplify args) argCount :: Type -> Int argCount (AppTy t _) = argCount t + 1 @@ -202,12 +211,12 @@ argCount (CastTy t _) = argCount t argCount _ = 0 simplify :: Type -> SimpleType -simplify (FunTy _ _ t1 t2) = SimpleType funTyConName [simplify t1, simplify t2] +simplify (FunTy _ _ t1 t2) = SimpleType (SName funTyConName) [simplify t1, simplify t2] simplify (ForAllTy _ t) = simplify t simplify (AppTy t1 t2) = SimpleType s (ts ++ maybeToList (simplify_maybe t2)) where (SimpleType s ts) = simplify t1 -simplify (TyVarTy v) = SimpleType (tyVarName v) [] -simplify (TyConApp tc ts) = SimpleType (tyConName tc) +simplify (TyVarTy v) = SimpleType (SName (tyVarName v)) [] +simplify (TyConApp tc ts) = SimpleType (SName (tyConName tc)) (mapMaybe simplify_maybe ts) simplify (LitTy l) = SimpleTyLit l simplify (CastTy ty _) = simplify ty @@ -218,9 +227,9 @@ simplify_maybe (CoercionTy {}) = Nothing simplify_maybe ty = Just (simplify ty) -- Used for sorting -instFam :: FamInst -> ([Int], Name, [SimpleType], Int, SimpleType) +instFam :: FamInst -> ([Int], SName, [SimpleType], Int, SimpleType) instFam FamInst { fi_fam = n, fi_tys = ts, fi_rhs = t } - = (map argCount ts, n, map simplify ts, argCount t, simplify t) + = (map argCount ts, SName n, map simplify ts, argCount t, simplify t) -------------------------------------------------------------------------------- |