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1. readTVar :: MonadSTM stm => TVar stm a -> stm a

   concurrency	Control.Concurrent.Classy.STM.TVar

   Return the current value stored in a TVar.

2. readTVarConc :: MonadConc m => TVar (STM m) a -> m a

   concurrency	Control.Concurrent.Classy.STM.TVar

   Read the current value stored in a TVar. This may be implemented differently for speed.

   readTVarConc = atomically . readTVar
   

3. readForCAS :: MonadConc m => IORef m a -> m (Ticket m a)

   concurrency	Control.Monad.Conc.Class

   Read the current value stored in a reference, returning a Ticket, for use in future compare-and-swap operations.

4. readIORef :: MonadConc m => IORef m a -> m a

   concurrency	Control.Monad.Conc.Class

   Read the current value stored in a reference.

   readIORef ioref = readForCAS ioref >>= peekTicket
   

5. readMVar :: MonadConc m => MVar m a -> m a

   concurrency	Control.Monad.Conc.Class

   Block until a value is present in the MVar, and then return it. This does not "remove" the value, multiple reads are possible.

6. readTVarConc :: MonadConc m => TVar (STM m) a -> m a

   concurrency	Control.Monad.Conc.Class

   Read the current value stored in a TVar. This may be implemented differently for speed.

   readTVarConc = atomically . readTVar
   

7. readTVar :: MonadSTM stm => TVar stm a -> stm a

   concurrency	Control.Monad.STM.Class

   Return the current value stored in a TVar.

8. readable :: (Read a, Typeable a) => Text -> Either String a

   config-ini	Data.Ini.Config

   Try to use the Read instance for a type to parse a value, failing with a human-readable error message if reading fails.

   >>> readable "(5, 7)" :: Either String (Int, Int)
   Right (5,7)
   
   >>> readable "hello" :: Either String (Int, Int)
   Left "Unable to parse \"hello\" as a value of type (Int,Int)"
   

9. readable :: (Show a, Read a, Typeable a) => FieldValue a

   config-ini	Data.Ini.Config.Bidir

   A FieldValue for parsing and serializing values according to the logic of the Read and Show instances for that type, providing a convenient human-readable error message if the parsing step fails.

10. readURef :: (PrimMonad m, Unbox a) => URef (PrimState m) a -> m a

    data-sketches-core	DataSketches.Core.Internal.URef

    Read the value in a URef

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