Index - R
| reachable | Data.Graph | 
| replicate | Data.Sequence.Internal, Data.Sequence | 
| replicateA | Data.Sequence.Internal, Data.Sequence | 
| replicateM | Data.Sequence.Internal, Data.Sequence | 
| restrictKeys | |
| 1 (Function) | Data.Map.Internal, Data.Map.Strict.Internal, Data.Map.Strict, Data.Map.Lazy, Data.Map | 
| 2 (Function) | Data.IntMap.Internal, Data.IntMap.Strict.Internal, Data.IntMap.Strict, Data.IntMap.Lazy, Data.IntMap | 
| reverse | Data.Sequence.Internal, Data.Sequence | 
| reverseTopSort | Data.Graph | 
| rootLabel | Data.Tree | 
| runIdentity | Data.Map.Internal | 
| runState | Data.Sequence.Internal | 
| runWhenMatched | |
| 1 (Function) | Data.Map.Internal, Data.Map.Merge.Lazy, Data.Map.Strict.Internal, Data.Map.Merge.Strict | 
| 2 (Function) | Data.IntMap.Internal, Data.IntMap.Merge.Lazy, Data.IntMap.Merge.Strict | 
| runWhenMissing | |
| 1 (Function) | Data.Map.Internal, Data.Map.Merge.Lazy, Data.Map.Strict.Internal, Data.Map.Merge.Strict | 
| 2 (Function) | Data.IntMap.Internal, Data.IntMap.Merge.Lazy, Data.IntMap.Merge.Strict |