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Diffstat (limited to 'src/GF/Speech/Relation.hs')
| -rw-r--r-- | src/GF/Speech/Relation.hs | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/GF/Speech/Relation.hs b/src/GF/Speech/Relation.hs index 2ad3faccb..c66a07d10 100644 --- a/src/GF/Speech/Relation.hs +++ b/src/GF/Speech/Relation.hs @@ -100,10 +100,10 @@ purgeEmpty r = Map.filter (not . Set.null) r -- | Get the equivalence classes from an equivalence relation. -equivalenceClasses :: Ord a => Rel a -> [[a]] +equivalenceClasses :: Ord a => Rel a -> [Set a] equivalenceClasses r = equivalenceClasses_ (Map.keys r) r where equivalenceClasses_ [] _ = [] - equivalenceClasses_ (x:xs) r = Set.toList ys:equivalenceClasses_ zs r + equivalenceClasses_ (x:xs) r = ys:equivalenceClasses_ zs r where ys = allRelated r x zs = [x' | x' <- xs, not (x' `Set.member` ys)] |