| UArray | Data.Array.Unboxed |
| UnboxedTuples | Language.Haskell.Extension, Distribution.Extension, Distribution.Simple |
| UndecidableInstances | Language.Haskell.Extension, Distribution.Extension, Distribution.Simple |
| UndefinedElement | Control.Exception |
| Underflow | Control.Exception |
| UndoBegin | System.Console.Readline |
| UndoCode | System.Console.Readline |
| UndoDelete | System.Console.Readline |
| UndoEnd | System.Console.Readline |
| UndoInsert | System.Console.Readline |
| UnicodeSyntax | Language.Haskell.Extension, Distribution.Extension, Distribution.Simple |
| UnionVersionRanges | Distribution.Version, Distribution.Simple |
| Uniq | Language.Haskell.TH.Syntax |
| Unique | Data.Unique |
| UnliftedFFITypes | Language.Haskell.Extension, Distribution.Extension, Distribution.Simple |
| Unlock | System.Posix.IO, System.Posix |
| UnregisterCmd | Distribution.Simple.Setup, Distribution.Setup |
| Unsafe | Language.Haskell.TH.Syntax, Language.Haskell.TH |
| UppercaseLetter | Data.Char |
| UserEntry |
| 1 (Type/Class) | System.Posix.User, System.Posix |
| 2 (Data Constructor) | System.Posix.User, System.Posix |
| UserHooks |
| 1 (Type/Class) | Distribution.Simple |
| 2 (Data Constructor) | Distribution.Simple |
| UserID | System.Posix.Types, System.Posix |
| UserPackageDB | Distribution.Simple.Compiler, Distribution.Simple.Setup, Distribution.Setup, Distribution.Simple |
| UserSpecified | Distribution.Simple.Program |
| unGM | Data.Generics.Aliases, Data.Generics |
| unGQ | Data.Generics.Aliases, Data.Generics |
| unGT | Data.Generics.Aliases, Data.Generics |
| unGeneric' | Data.Generics.Aliases, Data.Generics |
| unGetChan | Control.Concurrent.Chan, Control.Concurrent |
| unbindCommandInMap | System.Console.Readline |
| unbindKey | System.Console.Readline |
| unbindKeyInMap | System.Console.Readline |
| unblock | Control.Exception |
| unblockAsyncExceptions# | GHC.Prim, GHC.Exts |
| unblockSignals | System.Posix.Signals, System.Posix.Signals.Exts, System.Posix |
| uncheckedIShiftL# | GHC.Prim, GHC.Exts |
| uncheckedIShiftL64# | GHC.Exts |
| uncheckedIShiftRA# | GHC.Prim, GHC.Exts |
| uncheckedIShiftRA64# | GHC.Exts |
| uncheckedIShiftRL# | GHC.Prim, GHC.Exts |
| uncheckedShiftL# | GHC.Prim, GHC.Exts |
| uncheckedShiftL64# | GHC.Exts |
| uncheckedShiftRL# | GHC.Prim, GHC.Exts |
| uncheckedShiftRL64# | GHC.Exts |
| uncons |
| 1 (Function) | Data.ByteString |
| 2 (Function) | Data.ByteString.Char8 |
| 3 (Function) | Data.ByteString.Lazy |
| 4 (Function) | Data.ByteString.Lazy.Char8 |
| uncurry | Data.Tuple, Prelude |
| undefined | Prelude |
| undl | System.Posix.DynamicLinker |
| unfoldForest | Data.Tree |
| unfoldForestM | Data.Tree |
| unfoldForestM_BF | Data.Tree |
| unfoldTree | Data.Tree |
| unfoldTreeM | Data.Tree |
| unfoldTreeM_BF | Data.Tree |
| unfoldr |
| 1 (Function) | Data.ByteString |
| 2 (Function) | Data.ByteString.Char8 |
| 3 (Function) | Data.ByteString.Lazy |
| 4 (Function) | Data.ByteString.Lazy.Char8 |
| 5 (Function) | Data.List, List |
| unfoldrN |
| 1 (Function) | Data.ByteString |
| 2 (Function) | Data.ByteString.Char8 |
| union |
| 1 (Function) | Data.IntMap |
| 2 (Function) | Data.IntSet |
| 3 (Function) | Data.List, List |
| 4 (Function) | Data.Map |
| 5 (Function) | Data.Set |
| unionBy | Data.List, List |
| unionFileModes | System.Posix.Files, System.Posix |
| unionWith |
| 1 (Function) | Data.IntMap |
| 2 (Function) | Data.Map |
| unionWithKey |
| 1 (Function) | Data.IntMap |
| 2 (Function) | Data.Map |
| unions |
| 1 (Function) | Data.IntMap |
| 2 (Function) | Data.IntSet |
| 3 (Function) | Data.Map |
| 4 (Function) | Data.Set |
| unionsWith |
| 1 (Function) | Data.IntMap |
| 2 (Function) | Data.Map |
| unless | Control.Monad, Monad |
| unlines |
| 1 (Function) | Data.ByteString.Char8 |
| 2 (Function) | Data.ByteString.Lazy.Char8 |
| 3 (Function) | Data.List, Prelude, List |
| unlinesPS | Data.PackedString |
| unlit | Distribution.Simple.PreProcess.Unlit |
| unmarshalObject | GHC.Dotnet |
| unmarshalString | GHC.Dotnet |
| unpack |
| 1 (Function) | Data.ByteString |
| 2 (Function) | Data.ByteString.Char8 |
| 3 (Function) | Data.ByteString.Lazy |
| 4 (Function) | Data.ByteString.Lazy.Char8 |
| unpackClosure# | GHC.Prim, GHC.Exts |
| unpackPS | Data.PackedString |
| unregHook | Distribution.Simple |
| unregister | Distribution.Simple.Register |
| unsafe | Language.Haskell.TH.Lib, Language.Haskell.TH |
| unsafeCoerce | Unsafe.Coerce |
| unsafeCoerce# | GHC.Prim, GHC.Exts |
| unsafeCreate | Data.ByteString.Internal |
| unsafeDrop | Data.ByteString.Unsafe |
| unsafeFinalize | Data.ByteString.Unsafe |
| unsafeForeignPtrToPtr | Foreign.ForeignPtr, Foreign, ForeignPtr |
| unsafeForeignPtrToStorableArray | Data.Array.Storable |
| unsafeFreeze | Data.Array.MArray, Data.Array.ST, Data.Array.Storable, Data.Array.IO |
| unsafeFreezeArray# | GHC.Prim, GHC.Exts |
| unsafeFreezeByteArray# | GHC.Prim, GHC.Exts |
| unsafeHead | Data.ByteString.Unsafe |
| unsafeIOToST |
| 1 (Function) | Control.Monad.ST.Lazy |
| 2 (Function) | Control.Monad.ST, Control.Monad.ST.Strict |
| unsafeIOToSTM | GHC.Conc |
| unsafeIndex | Data.ByteString.Unsafe |
| unsafeInterleaveIO | System.IO.Unsafe |
| unsafeInterleaveST |
| 1 (Function) | Control.Monad.ST.Lazy |
| 2 (Function) | Control.Monad.ST, Control.Monad.ST.Strict |
| unsafePackAddress | Data.ByteString.Unsafe |
| unsafePackAddressLen | Data.ByteString.Unsafe |
| unsafePackCString | Data.ByteString.Unsafe |
| unsafePackCStringFinalizer | Data.ByteString.Unsafe |
| unsafePackCStringLen | Data.ByteString.Unsafe |
| unsafePackMallocCString | Data.ByteString.Unsafe |
| unsafePerformIO | System.IO.Unsafe, Foreign |
| unsafeSTToIO | Control.Monad.ST, Control.Monad.ST.Strict |
| unsafeTail | Data.ByteString.Unsafe |
| unsafeTake | Data.ByteString.Unsafe |
| unsafeThaw | Data.Array.MArray, Data.Array.ST, Data.Array.Storable, Data.Array.IO |
| unsafeThawArray# | GHC.Prim, GHC.Exts |
| unsafeUseAsCString | Data.ByteString.Unsafe |
| unsafeUseAsCStringLen | Data.ByteString.Unsafe |
| unsetEnv | System.Posix.Env, System.Posix |
| unsupportedExtensions | Distribution.Simple.Compiler, Distribution.Simple |
| until | Prelude |
| unwords |
| 1 (Function) | Data.ByteString.Char8 |
| 2 (Function) | Data.ByteString.Lazy.Char8 |
| 3 (Function) | Data.List, Prelude, List |
| unwordsPS | Data.PackedString |
| unwrapArrow | Control.Applicative |
| unwrapMonad | Control.Applicative |
| unzip |
| 1 (Function) | Data.ByteString |
| 2 (Function) | Data.ByteString.Char8 |
| 3 (Function) | Data.ByteString.Lazy |
| 4 (Function) | Data.List, Prelude, List |
| unzip3 | Data.List, Prelude, List |
| unzip4 | Data.List, List |
| unzip5 | Data.List, List |
| unzip6 | Data.List, List |
| unzip7 | Data.List, List |
| update |
| 1 (Function) | Data.HashTable |
| 2 (Function) | Data.IntMap |
| 3 (Function) | Data.Map |
| 4 (Function) | Data.Sequence |
| updateAt | Data.Map |
| updateLookupWithKey |
| 1 (Function) | Data.IntMap |
| 2 (Function) | Data.Map |
| updateMax |
| 1 (Function) | Data.IntMap |
| 2 (Function) | Data.Map |
| updateMaxWithKey |
| 1 (Function) | Data.IntMap |
| 2 (Function) | Data.Map |
| updateMin |
| 1 (Function) | Data.IntMap |
| 2 (Function) | Data.Map |
| updateMinWithKey |
| 1 (Function) | Data.IntMap |
| 2 (Function) | Data.Map |
| updatePackageDescription | Distribution.PackageDescription |
| updateProgram | Distribution.Simple.Program |
| updateTix | Trace.Hpc.Reflect |
| updateWithKey |
| 1 (Function) | Data.IntMap |
| 2 (Function) | Data.Map |
| urgentDataAvailable | System.Posix.Signals, System.Posix.Signals.Exts, System.Posix |
| usageInfo | System.Console.GetOpt |
| useAsCString | Data.ByteString, Data.ByteString.Char8 |
| useAsCStringLen | Data.ByteString, Data.ByteString.Char8 |
| userDefinedSignal1 | System.Posix.Signals, System.Posix.Signals.Exts, System.Posix |
| userDefinedSignal2 | System.Posix.Signals, System.Posix.Signals.Exts, System.Posix |
| userError | System.IO.Error, Prelude, IO |
| userErrorType | System.IO.Error, MarshalError |
| userErrors | Control.Exception |
| userGecos | System.Posix.User, System.Posix |
| userGroupID | System.Posix.User, System.Posix |
| userID | System.Posix.User, System.Posix |
| userMaybeSpecifyPath | Distribution.Simple.Program |
| userName | System.Posix.User, System.Posix |
| userPassword | System.Posix.User, System.Posix |
| userShell | System.Posix.User, System.Posix |
| userSpecifyArgs | Distribution.Simple.Program |
| userSpecifyPath | Distribution.Simple.Program |
| userTime | System.Posix.Process, System.Posix |
| usernameCompletionFunction | System.Console.Readline |
| usleep | System.Posix.Unistd, System.Posix |
