 | Haskell Core Libraries (base package) | Contents | Index |
| Either | Data.Either Prelude |
| Enum | GHC.Enum Prelude |
| Eq | GHC.Base Prelude |
| Errno | Foreign.C Foreign.C.Error |
| Error | Control.Monad.Error |
| ErrorT | Control.Monad.Error |
| Exception | Control.Exception GHC.Exception GHC.IOBase |
| ExitCode | GHC.IOBase System.Exit |