| U1 |  | 
| 1 (Data Constructor) | GHC.Generics | 
| 2 (Type/Class) | GHC.Generics | 
| UAddr |  | 
| 1 (Data Constructor) | GHC.Generics | 
| 2 (Type/Class) | GHC.Generics | 
| uAddr# | GHC.Generics | 
| UArray | Data.Array.Unboxed | 
| UChar |  | 
| 1 (Data Constructor) | GHC.Generics | 
| 2 (Type/Class) | GHC.Generics | 
| uChar# | GHC.Generics | 
| UCL_1_0 | Distribution.SPDX.LicenseId, Distribution.SPDX | 
| UDouble |  | 
| 1 (Data Constructor) | GHC.Generics | 
| 2 (Type/Class) | GHC.Generics | 
| uDouble# | GHC.Generics | 
| UFloat |  | 
| 1 (Data Constructor) | GHC.Generics | 
| 2 (Type/Class) | GHC.Generics | 
| uFloat# | GHC.Generics | 
| UHC | Distribution.Compiler, Distribution.Simple.Compiler, Distribution.Simple | 
| uhcProgram | Distribution.Simple.Program.Builtin, Distribution.Simple.Program | 
| UInfixE | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| uInfixE | Language.Haskell.TH.Lib.Internal, Language.Haskell.TH.Lib, Language.Haskell.TH | 
| UInfixP | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| uInfixP | Language.Haskell.TH.Lib.Internal, Language.Haskell.TH.Lib, Language.Haskell.TH | 
| UInfixT | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| uInfixT | Language.Haskell.TH.Lib.Internal, Language.Haskell.TH.Lib, Language.Haskell.TH | 
| UInt |  | 
| 1 (Data Constructor) | GHC.Generics | 
| 2 (Type/Class) | GHC.Generics | 
| uInt# | GHC.Generics | 
| ulist | Text.XHtml.Strict, Text.XHtml.Frameset, Text.XHtml.Transitional, Text.XHtml | 
| unAbiHash | Distribution.Types.AbiHash, Distribution.Package, Distribution.Make, Distribution.Simple | 
| Unambiguous | Distribution.Simple.PackageIndex | 
| unBigNat |  | 
| 1 (Function) | GHC.Natural | 
| 2 (Function) | GHC.Num.BigNat | 
| 3 (Function) | GHC.Integer.GMP.Internals | 
| unblockSignals | System.Posix.Signals, System.Posix.Signals.Exts, System.Posix.ByteString, System.Posix | 
| UnboundVarE | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| unboundVarE | Language.Haskell.TH.Lib.Internal, Language.Haskell.TH.Lib, Language.Haskell.TH | 
| unboxedSumBars | Language.Haskell.TH.Ppr | 
| unboxedSumDataName | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| UnboxedSumE | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| unboxedSumE | Language.Haskell.TH.Lib.Internal, Language.Haskell.TH.Lib, Language.Haskell.TH | 
| UnboxedSumP | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| unboxedSumP | Language.Haskell.TH.Lib.Internal, Language.Haskell.TH.Lib, Language.Haskell.TH | 
| UnboxedSums |  | 
| 1 (Data Constructor) | Language.Haskell.Extension, Distribution.Simple | 
| 2 (Data Constructor) | GHC.LanguageExtensions.Type | 
| 3 (Data Constructor) | GHC.LanguageExtensions | 
| 4 (Data Constructor) | Language.Haskell.TH.LanguageExtensions, Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| UnboxedSumT | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| unboxedSumT | Language.Haskell.TH.Lib.Internal, Language.Haskell.TH.Lib, Language.Haskell.TH | 
| unboxedSumTypeName | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| UnboxedTupE | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| unboxedTupE |  | 
| 1 (Function) | Language.Haskell.TH.Lib, Language.Haskell.TH | 
| 2 (Function) | Language.Haskell.TH.Lib.Internal | 
| unboxedTupleDataName | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| UnboxedTuples |  | 
| 1 (Data Constructor) | Language.Haskell.Extension, Distribution.Simple | 
| 2 (Data Constructor) | GHC.LanguageExtensions.Type | 
| 3 (Data Constructor) | GHC.LanguageExtensions | 
| 4 (Data Constructor) | Language.Haskell.TH.LanguageExtensions, Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| UnboxedTupleT | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| unboxedTupleT | Language.Haskell.TH.Lib.Internal, Language.Haskell.TH.Lib, Language.Haskell.TH | 
| unboxedTupleTypeName | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| UnboxedTupP | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| unboxedTupP | Language.Haskell.TH.Lib.Internal, Language.Haskell.TH.Lib, Language.Haskell.TH | 
| uncheckedIShiftL# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| uncheckedIShiftL64# | GHC.Int, GHC.Exts | 
| uncheckedIShiftRA# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| uncheckedIShiftRA64# | GHC.Int, GHC.Exts | 
| uncheckedIShiftRL# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| uncheckedShiftL# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| uncheckedShiftL64# | GHC.Word, GHC.Exts | 
| uncheckedShiftRL# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| uncheckedShiftRL64# | GHC.Word, GHC.Exts | 
| unComp1 | GHC.Generics | 
| unComponentId | Distribution.Types.ComponentId, Distribution.Package, Distribution.Make, Distribution.Simple | 
| unconfigureProgram | Distribution.Simple.Program.Db | 
| uncons |  | 
| 1 (Function) | Data.List.NonEmpty | 
| 2 (Function) | GHC.List, Data.List, GHC.OldList | 
| 3 (Function) | Data.ByteString.Char8 | 
| 4 (Function) | Data.ByteString.Lazy.Char8 | 
| 5 (Function) | Data.ByteString.Lazy | 
| 6 (Function) | Data.ByteString | 
| 7 (Function) | Text.Parsec.Prim, Text.Parsec | 
| 8 (Function) | Data.Text.Lazy | 
| 9 (Function) | Data.Text | 
| 10 (Function) | Data.Text.Internal.Fusion.Common | 
| unconsQ | Utils.Containers.Internal.BitQueue | 
| uncurry |  | 
| 1 (Function) | Distribution.Compat.Prelude.Internal | 
| 2 (Function) | Data.Tuple, Prelude | 
| 3 (Function) | System.Directory.Internal.Prelude | 
| UndecidableInstances |  | 
| 1 (Data Constructor) | Language.Haskell.Extension, Distribution.Simple | 
| 2 (Data Constructor) | GHC.LanguageExtensions.Type | 
| 3 (Data Constructor) | GHC.LanguageExtensions | 
| 4 (Data Constructor) | Language.Haskell.TH.LanguageExtensions, Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| UndecidableSuperClasses |  | 
| 1 (Data Constructor) | Language.Haskell.Extension, Distribution.Simple | 
| 2 (Data Constructor) | GHC.LanguageExtensions.Type | 
| 3 (Data Constructor) | GHC.LanguageExtensions | 
| 4 (Data Constructor) | Language.Haskell.TH.LanguageExtensions, Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| undefined |  | 
| 1 (Function) | Distribution.Compat.Prelude.Internal | 
| 2 (Function) | GHC.Base, GHC.Err, Prelude | 
| 3 (Function) | System.Directory.Internal.Prelude | 
| UndefinedElement | GHC.IO.Exception, Control.Exception, Control.Exception.Base | 
| unDefUnitId | Distribution.Types.UnitId, Distribution.Backpack, Distribution.Package, Distribution.Make, Distribution.Simple | 
| Underflow | GHC.Exception, Control.Exception, Control.Exception.Base, GHC.Exception.Type | 
| underflowError | GHC.Real | 
| underflowException | GHC.Exception, GHC.Exception.Type | 
| UNDERFLOW_FRAME | GHC.Exts.Heap.ClosureTypes, GHC.Exts.Heap | 
| underline | Text.XHtml.Transitional, Text.XHtml | 
| underlineAttr | System.Console.Terminfo.Effects, System.Console.Terminfo | 
| undl | System.Posix.DynamicLinker.ByteString, System.Posix.DynamicLinker, System.Posix.ByteString, System.Posix | 
| unescapeArgs | GHC.ResponseFile | 
| UnExpect | Text.Parsec.Error, Text.ParserCombinators.Parsec.Error | 
| unexpected |  | 
| 1 (Function) | Distribution.Compat.Parsing, Distribution.Compat.CharParsing | 
| 2 (Function) | Text.Parsec.Prim, Text.Parsec, Text.ParserCombinators.Parsec.Prim, Text.ParserCombinators.Parsec | 
| unexpectedValue | GHC.Num.Primitives | 
| unexpectedValue_Int# | GHC.Num.Primitives | 
| unexpectedValue_Word# | GHC.Num.Primitives | 
| unFlagAssignment | Distribution.Types.Flag, Distribution.PackageDescription | 
| unFlagName | Distribution.Types.Flag, Distribution.PackageDescription | 
| unfold | Data.List.NonEmpty | 
| unfoldForest | Data.Tree | 
| unfoldForestM | Data.Tree | 
| unfoldForestM_BF | Data.Tree | 
| unfoldl | Data.Sequence.Internal, Data.Sequence | 
| unfoldr |  | 
| 1 (Function) | Distribution.Compat.Prelude.Internal | 
| 2 (Function) | Data.List.NonEmpty | 
| 3 (Function) | Data.List, GHC.OldList | 
| 4 (Function) | Data.ByteString.Char8 | 
| 5 (Function) | Data.ByteString.Lazy.Char8 | 
| 6 (Function) | Data.ByteString.Lazy | 
| 7 (Function) | Data.ByteString | 
| 8 (Function) | Data.Sequence.Internal, Data.Sequence | 
| 9 (Function) | Data.Text.Lazy | 
| 10 (Function) | Data.Text | 
| 11 (Function) | Data.Text.Internal.Fusion.Common | 
| unfoldrM | Distribution.Utils.Generic | 
| unfoldrN |  | 
| 1 (Function) | Data.ByteString.Char8 | 
| 2 (Function) | Data.ByteString | 
| 3 (Function) | Data.Text.Lazy | 
| 4 (Function) | Data.Text.Internal.Lazy.Fusion | 
| 5 (Function) | Data.Text | 
| 6 (Function) | Data.Text.Internal.Fusion | 
| unfoldrNI | Data.Text.Internal.Fusion.Common | 
| unfoldTree | Data.Tree | 
| unfoldTreeM | Data.Tree | 
| unfoldTreeM_BF | Data.Tree | 
| unGetTBQueue | Control.Concurrent.STM.TBQueue, Control.Concurrent.STM | 
| unGetTChan | Control.Concurrent.STM.TChan, Control.Concurrent.STM | 
| unGetTQueue | Control.Concurrent.STM.TQueue, Control.Concurrent.STM | 
| Uni | Data.Fixed | 
| UnicodeException | Data.Text.Encoding.Error | 
| UnicodeSyntax |  | 
| 1 (Data Constructor) | Language.Haskell.Extension, Distribution.Simple | 
| 2 (Data Constructor) | GHC.LanguageExtensions.Type | 
| 3 (Data Constructor) | GHC.LanguageExtensions | 
| 4 (Data Constructor) | Language.Haskell.TH.LanguageExtensions, Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| unicodeVersion | GHC.Unicode | 
| Unicode_DFS_2015 | Distribution.SPDX.LicenseId, Distribution.SPDX | 
| Unicode_DFS_2016 | Distribution.SPDX.LicenseId, Distribution.SPDX | 
| Unicode_TOU | Distribution.SPDX.LicenseId, Distribution.SPDX | 
| Unidir | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| unidir | Language.Haskell.TH.Lib.Internal, Language.Haskell.TH.Lib, Language.Haskell.TH | 
| unifiedIPIDRequired | Distribution.Simple.Compiler, Distribution.Simple | 
| uninterruptibleMask |  | 
| 1 (Function) | GHC.IO, Control.Exception, Control.Exception.Base | 
| 2 (Function) | Control.Monad.Catch, Control.Monad.Catch.Pure | 
| uninterruptibleMask_ |  | 
| 1 (Function) | GHC.IO, Control.Exception, Control.Exception.Base | 
| 2 (Function) | Control.Monad.Catch, Control.Monad.Catch.Pure | 
| unintersperse | Distribution.Utils.Generic, Distribution.Simple.Utils | 
| unIO | GHC.Base, GHC.IO | 
| union |  | 
| 1 (Function) | Distribution.Simple.Program.Hpc | 
| 2 (Function) | Data.List, GHC.OldList | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Strict.Internal, Data.IntMap.Strict, Data.IntMap.Lazy, Data.IntMap | 
| 4 (Function) | Data.IntSet.Internal, Data.IntSet | 
| 5 (Function) | Data.Map.Internal, Data.Map.Strict.Internal, Data.Map.Strict, Data.Map.Lazy, Data.Map | 
| 6 (Function) | Data.Set.Internal, Data.Set | 
| unionBy | Data.List, GHC.OldList | 
| unionFileModes | System.Posix.Files.ByteString, System.Posix.Files, System.Posix.ByteString, System.Posix | 
| unionLeft | Distribution.Compat.Graph | 
| unionRight | Distribution.Compat.Graph | 
| unions |  | 
| 1 (Function) | Data.IntMap.Internal, Data.IntMap.Strict.Internal, Data.IntMap.Strict, Data.IntMap.Lazy, Data.IntMap | 
| 2 (Function) | Data.IntSet.Internal, Data.IntSet | 
| 3 (Function) | Data.Map.Internal, Data.Map.Strict.Internal, Data.Map.Strict, Data.Map.Lazy, Data.Map | 
| 4 (Function) | Data.Set.Internal, Data.Set | 
| unionSize | Data.Text.Internal.Fusion.Size | 
| unionsWith |  | 
| 1 (Function) | Data.IntMap.Strict.Internal, Data.IntMap.Strict | 
| 2 (Function) | Data.Map.Strict.Internal, Data.Map.Strict | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Lazy, Data.IntMap | 
| 4 (Function) | Data.Map.Internal, Data.Map.Lazy, Data.Map | 
| unionVersionIntervals | Distribution.Types.VersionInterval, Distribution.Version, Distribution.Simple | 
| UnionVersionRanges | Distribution.Types.VersionRange.Internal | 
| unionVersionRanges | Distribution.Types.VersionRange.Internal, Distribution.Types.VersionRange, Distribution.Version, Distribution.Simple | 
| UnionVersionRangesF | Distribution.Types.VersionRange.Internal, Distribution.Types.VersionRange, Distribution.Version, Distribution.Simple | 
| unionWith |  | 
| 1 (Function) | Data.IntMap.Strict.Internal, Data.IntMap.Strict | 
| 2 (Function) | Data.Map.Strict.Internal, Data.Map.Strict | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Lazy, Data.IntMap | 
| 4 (Function) | Data.Map.Internal, Data.Map.Lazy, Data.Map | 
| unionWithKey |  | 
| 1 (Function) | Data.IntMap.Strict.Internal, Data.IntMap.Strict | 
| 2 (Function) | Data.Map.Strict.Internal, Data.Map.Strict | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Lazy, Data.IntMap | 
| 4 (Function) | Data.Map.Internal, Data.Map.Lazy, Data.Map | 
| Uniq | Language.Haskell.TH.Syntax | 
| Unique | Data.Unique | 
| uniqueField | Distribution.FieldGrammar.Class, Distribution.FieldGrammar | 
| uniqueFieldAla | Distribution.FieldGrammar.Class, Distribution.FieldGrammar | 
| uniqueSubdir | GHC.UniqueSubdir | 
| unitAbiDepends | GHC.Unit.Database | 
| unitAbiHash | GHC.Unit.Database | 
| unitCcOptions | GHC.Unit.Database | 
| unitComponentName | GHC.Unit.Database | 
| unitDepends | GHC.Unit.Database | 
| unitExposedModules | GHC.Unit.Database | 
| unitExtDepFrameworkDirs | GHC.Unit.Database | 
| unitExtDepFrameworks | GHC.Unit.Database | 
| unitExtDepLibsGhc | GHC.Unit.Database | 
| unitExtDepLibsSys | GHC.Unit.Database | 
| unitHaddockHTMLs | GHC.Unit.Database | 
| unitHaddockInterfaces | GHC.Unit.Database | 
| unitHiddenModules | GHC.Unit.Database | 
| UnitId | Distribution.Types.UnitId, Distribution.Package, Distribution.Make, Distribution.Simple | 
| unitId | GHC.Unit.Database | 
| unitIdSupported | Distribution.Simple.Compiler, Distribution.Simple | 
| unitIdTarget | Distribution.Types.LocalBuildInfo | 
| unitIdTarget' | Distribution.Types.LocalBuildInfo | 
| unitImportDirs | GHC.Unit.Database | 
| unitIncludeDirs | GHC.Unit.Database | 
| unitIncludes | GHC.Unit.Database | 
| unitInstanceOf | GHC.Unit.Database | 
| unitInstantiations | GHC.Unit.Database | 
| unitIsExposed | GHC.Unit.Database | 
| unitIsIndefinite | GHC.Unit.Database | 
| unitIsTrusted | GHC.Unit.Database | 
| unitLibraries | GHC.Unit.Database | 
| unitLibraryDirs | GHC.Unit.Database | 
| unitLibraryDynDirs | GHC.Unit.Database | 
| unitLinkerOptions | GHC.Unit.Database | 
| unitPackageId | GHC.Unit.Database | 
| unitPackageName | GHC.Unit.Database | 
| unitPackageVersion | GHC.Unit.Database | 
| universalNewlineMode | System.IO, GHC.IO.Handle.Types, GHC.IO.Handle | 
| UniversalTime | Data.Time.Clock, Data.Time | 
| Universal_FOSS_exception_1_0 | Distribution.SPDX.LicenseExceptionId, Distribution.SPDX | 
| unK1 | GHC.Generics | 
| unknownCompilerInfo | Distribution.Compiler, Distribution.Simple.Compiler, Distribution.Simple | 
| unknownError | Text.Parsec.Prim, Text.Parsec | 
| UnknownExtension | Language.Haskell.Extension, Distribution.Simple | 
| UnknownLanguage | Language.Haskell.Extension, Distribution.Simple | 
| UnknownLicense | Distribution.License, Distribution.Make, Distribution.Simple | 
| unknownSize | Data.Text.Internal.Fusion.Size | 
| unless |  | 
| 1 (Function) | Distribution.Compat.Prelude.Internal | 
| 2 (Function) | Control.Monad | 
| 3 (Function) | System.Directory.Internal.Prelude | 
| 4 (Function) | Control.Monad.Identity, Control.Monad.State.Strict, Control.Monad.State.Lazy, Control.Monad.State, Control.Monad.Reader, Control.Monad.List, Control.Monad.Except, Control.Monad.Error, Control.Monad.Cont, Control.Monad.RWS.Strict, Control.Monad.RWS.Lazy, Control.Monad.RWS, Control.Monad.Writer.Lazy, Control.Monad.Writer, Control.Monad.Writer.Strict | 
| unLex | Distribution.Fields.LexerMonad | 
| Unlicense | Distribution.SPDX.LicenseId, Distribution.SPDX | 
| unLift | Control.Applicative.Lift | 
| Unlifted | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| UnliftedFFITypes |  | 
| 1 (Data Constructor) | Language.Haskell.Extension, Distribution.Simple | 
| 2 (Data Constructor) | GHC.LanguageExtensions.Type | 
| 3 (Data Constructor) | GHC.LanguageExtensions | 
| 4 (Data Constructor) | Language.Haskell.TH.LanguageExtensions, Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| UnliftedNewtypes |  | 
| 1 (Data Constructor) | Language.Haskell.Extension, Distribution.Simple | 
| 2 (Data Constructor) | GHC.LanguageExtensions.Type | 
| 3 (Data Constructor) | GHC.LanguageExtensions | 
| 4 (Data Constructor) | Language.Haskell.TH.LanguageExtensions, Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| UnliftedRep |  | 
| 1 (Data Constructor) | GHC.Base, GHC.Exts | 
| 2 (Data Constructor) | GHC.Types | 
| unlines |  | 
| 1 (Function) | Distribution.Compat.Prelude.Internal | 
| 2 (Function) | Data.String, Data.List, GHC.OldList, Prelude | 
| 3 (Function) | Data.ByteString.Char8 | 
| 4 (Function) | Data.ByteString.Lazy.Char8 | 
| 5 (Function) | System.Directory.Internal.Prelude | 
| 6 (Function) | Data.Text.Lazy | 
| 7 (Function) | Data.Text | 
| unListT | System.Directory.Internal | 
| unlit | Distribution.Simple.PreProcess.Unlit | 
| UnloadObj | GHCi.Message | 
| unloadObj | GHCi.ObjLink | 
| Unlock | System.Posix.IO.ByteString, System.Posix.IO, System.Posix.ByteString, System.Posix | 
| unlockPackageDb | GHC.Unit.Database | 
| unM1 | GHC.Generics | 
| unmaskAsyncExceptions# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| Unmasked | GHC.IO, Control.Exception, Control.Exception.Base | 
| unopPrec | Language.Haskell.TH.Ppr | 
| unordList | Text.XHtml.Strict, Text.XHtml.Frameset, Text.XHtml.Transitional, Text.XHtml | 
| unpack |  | 
| 1 (Function) | Distribution.Compat.Newtype | 
| 2 (Function) | Data.ByteString.Char8 | 
| 3 (Function) | Data.ByteString.Lazy.Char8 | 
| 4 (Function) | Data.ByteString.Lazy | 
| 5 (Function) | Data.ByteString | 
| 6 (Function) | Data.ByteString.Short.Internal, Data.ByteString.Short | 
| 7 (Function) | Data.Text.Lazy | 
| 8 (Function) | Data.Text | 
| unpack' | Distribution.Compat.Newtype | 
| unPackageName | Distribution.Types.PackageName, Distribution.Package, Distribution.PackageDescription, Distribution.Make, Distribution.Simple | 
| unPackageNameST | Distribution.Types.PackageName, Distribution.Package, Distribution.PackageDescription, Distribution.Make, Distribution.Simple | 
| unpackAppendBytesLazy | Data.ByteString.Internal | 
| unpackAppendBytesStrict | Data.ByteString.Internal | 
| unpackAppendCharsLazy | Data.ByteString.Internal | 
| unpackAppendCharsStrict | Data.ByteString.Internal | 
| unpackAppendCString# |  | 
| 1 (Function) | GHC.Base, GHC.Pack, GHC.Exts | 
| 2 (Function) | GHC.CString | 
| unpackAppendCStringUtf8# |  | 
| 1 (Function) | GHC.Base | 
| 2 (Function) | GHC.CString | 
| unpackBytes |  | 
| 1 (Function) | Data.ByteString.Lazy.Internal | 
| 2 (Function) | Data.ByteString.Internal | 
| unpackChars |  | 
| 1 (Function) | Data.ByteString.Lazy.Internal | 
| 2 (Function) | Data.ByteString.Internal | 
| unpackClosure# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| unpackCString | GHC.Pack | 
| unpackCString# |  | 
| 1 (Function) | GHC.Base, GHC.Pack, GHC.Exts | 
| 2 (Function) | GHC.CString | 
| 3 (Function) | Data.Text | 
| unpackCStringUtf8# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.CString | 
| unpackDoubleX2# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackDoubleX4# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackDoubleX8# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpacked | Language.Haskell.TH.Lib.Internal, Language.Haskell.TH.Lib, Language.Haskell.TH | 
| unpackFloatX16# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackFloatX4# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackFloatX8# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackFoldrCString# |  | 
| 1 (Function) | GHC.Base, GHC.Pack, GHC.Exts | 
| 2 (Function) | GHC.CString | 
| unpackFoldrCStringUtf8# |  | 
| 1 (Function) | GHC.Base | 
| 2 (Function) | GHC.CString | 
| unpackInt16X16# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackInt16X32# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackInt16X8# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackInt32X16# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackInt32X4# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackInt32X8# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackInt64X2# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackInt64X4# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackInt64X8# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackInt8X16# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackInt8X32# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackInt8X64# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackNBytes# |  | 
| 1 (Function) | GHC.Base, GHC.Pack, GHC.Exts | 
| 2 (Function) | GHC.CString | 
| unpackWord16X16# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackWord16X32# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackWord16X8# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackWord32X16# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackWord32X4# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackWord32X8# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackWord64X2# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackWord64X4# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackWord64X8# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackWord8X16# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackWord8X32# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unpackWord8X64# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unPar1 | GHC.Generics | 
| unPkgconfigName | Distribution.Types.PkgconfigName, Distribution.Package, Distribution.Make, Distribution.Simple | 
| unPP | Distribution.Parsec | 
| unPut | Data.Binary.Put | 
| unQ | Language.Haskell.TH.Syntax | 
| UnqualComponentName | Distribution.Types.UnqualComponentName, Distribution.PackageDescription | 
| unqualComponentNameToPackageName | Distribution.Types.UnqualComponentName, Distribution.PackageDescription | 
| unRec1 | GHC.Generics | 
| unregHook | Distribution.Simple.UserHooks, Distribution.Simple | 
| unregister |  | 
| 1 (Function) | Distribution.Simple.Register | 
| 2 (Function) | Distribution.Simple.Program.HcPkg | 
| unregisterCommand | Distribution.Simple.Setup | 
| unregisterFd | GHC.Event | 
| unregisterFd_ | GHC.Event | 
| unregisterInvocation | Distribution.Simple.Program.HcPkg | 
| unregisterTimeout | GHC.Event | 
| Unsafe |  | 
| 1 (Data Constructor) | Language.Haskell.Extension, Distribution.Simple | 
| 2 (Data Constructor) | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| unsafe | Language.Haskell.TH.Lib.Internal, Language.Haskell.TH.Lib, Language.Haskell.TH | 
| unsafeAccum | GHC.Arr | 
| unsafeAccumArray | GHC.Arr | 
| unsafeAccumArray' | GHC.Arr | 
| unsafeArray | GHC.Arr | 
| unsafeArray' | GHC.Arr | 
| unsafeAt | GHC.Arr | 
| unsafeChr |  | 
| 1 (Function) | GHC.Base | 
| 2 (Function) | Data.Text.Internal.Unsafe.Char | 
| unsafeChr32 | Data.Text.Internal.Unsafe.Char | 
| unsafeChr8 | Data.Text.Internal.Unsafe.Char | 
| unsafeCodeCoerce | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| unsafeCoerce | Unsafe.Coerce | 
| unsafeCoerce# |  | 
| 1 (Function) | Unsafe.Coerce, GHC.Exts | 
| 2 (Function) | GHC.Prim | 
| unsafeCoerceAddr | Unsafe.Coerce | 
| unsafeCoerceUnlifted | Unsafe.Coerce | 
| unsafeCopyToPtr | Data.Text.Foreign | 
| unsafeCreate | Data.ByteString.Internal | 
| unsafeCreateUptoN | Data.ByteString.Internal | 
| unsafeCreateUptoN' | Data.ByteString.Internal | 
| unsafeDrop | Data.ByteString.Unsafe | 
| unsafeDupableInterleaveIO | GHC.IO, GHC.IO.Unsafe | 
| unsafeDupableInterleaveST | GHC.ST, Control.Monad.ST.Unsafe | 
| unsafeDupablePerformIO |  | 
| 1 (Function) | System.IO.Unsafe, GHC.IO, GHC.IO.Unsafe | 
| 2 (Function) | Data.Text.Unsafe | 
| UnsafeEquality | Unsafe.Coerce | 
| unsafeEqualityProof | Unsafe.Coerce | 
| unsafeFinalize | Data.ByteString.Unsafe | 
| unsafeFixIO | System.IO.Unsafe | 
| unsafeForeignPtrToPtr | GHC.ForeignPtr, Foreign.ForeignPtr.Unsafe | 
| unsafeForeignPtrToStorableArray | Data.Array.Unsafe | 
| unsafeForeignRefToRemoteRef | GHCi.RemoteTypes | 
| unsafeFreeze |  | 
| 1 (Function) | Data.Array.Unsafe | 
| 2 (Function) | Data.Text.Array | 
| unsafeFreezeArray# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| unsafeFreezeArrayArray# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| unsafeFreezeByteArray# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| unsafeFreezeSmallArray# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| unsafeFreezeSTArray | GHC.Arr | 
| unsafeFromUTF8BS | Distribution.Utils.ShortText | 
| unsafeHead |  | 
| 1 (Function) | Data.ByteString.Unsafe | 
| 2 (Function) | Data.Text.Unsafe | 
| unsafeIndex |  | 
| 1 (Function) | GHC.Ix, GHC.Arr | 
| 2 (Function) | Data.ByteString.Unsafe | 
| 3 (Function) | Data.ByteString.Short.Internal | 
| 4 (Function) | Data.Text.Array | 
| unsafeInit | Data.ByteString.Unsafe | 
| unsafeInterleaveIO | System.IO.Unsafe, GHC.IO, GHC.IO.Unsafe | 
| unsafeInterleaveST |  | 
| 1 (Function) | Control.Monad.ST.Lazy.Unsafe | 
| 2 (Function) | GHC.ST, Control.Monad.ST.Unsafe | 
| unsafeIOToST |  | 
| 1 (Function) | Control.Monad.ST.Lazy.Unsafe | 
| 2 (Function) | GHC.IO, Control.Monad.ST.Unsafe | 
| unsafeIOToSTM | GHC.Conc.Sync, GHC.Conc | 
| unsafeLast | Data.ByteString.Unsafe | 
| unsafeLocalState | Foreign.Marshal.Unsafe | 
| unsafeLookupStaticPtr | GHC.StaticPtr | 
| unsafeMkDefUnitId | Distribution.Types.UnitId, Distribution.Package, Distribution.Make, Distribution.Simple | 
| unsafePackAddress | Data.ByteString.Internal, Data.ByteString.Unsafe | 
| unsafePackAddressLen | Data.ByteString.Unsafe | 
| unsafePackCString | Data.ByteString.Unsafe | 
| unsafePackCStringFinalizer | Data.ByteString.Unsafe | 
| unsafePackCStringLen | Data.ByteString.Unsafe | 
| unsafePackLenBytes | Data.ByteString.Internal | 
| unsafePackLenChars | Data.ByteString.Internal | 
| unsafePackMallocCString | Data.ByteString.Unsafe | 
| unsafePackMallocCStringLen | Data.ByteString.Unsafe | 
| unsafePerformIO | System.IO.Unsafe, GHC.IO, GHC.IO.Unsafe | 
| unsafeRangeSize | GHC.Ix, GHC.Arr | 
| unsafeReadIOArray | GHC.IOArray | 
| unsafeReadSTArray | GHC.Arr | 
| UnsafeRefl | Unsafe.Coerce | 
| unsafeReplace | GHC.Arr | 
| UnsafeShift | Data.Text.Internal.Unsafe.Shift | 
| unsafeShiftL | Data.Bits, Foreign, Foreign.Safe | 
| unsafeShiftR | Data.Bits, Foreign, Foreign.Safe | 
| unsafeSTToIO | GHC.IO, Control.Monad.ST.Unsafe | 
| unsafeTail |  | 
| 1 (Function) | Data.ByteString.Unsafe | 
| 2 (Function) | Data.Text.Unsafe | 
| unsafeTake | Data.ByteString.Unsafe | 
| unsafeTExpCoerce | Language.Haskell.TH.Syntax | 
| unsafeThaw | Data.Array.Unsafe | 
| unsafeThawArray# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| unsafeThawSmallArray# |  | 
| 1 (Function) | GHC.Base, GHC.Exts | 
| 2 (Function) | GHC.PrimopWrappers | 
| 3 (Function) | GHC.Prim | 
| unsafeThawSTArray | GHC.Arr | 
| unsafeUnmask | GHC.IO | 
| unsafeUseAsCString | Data.ByteString.Unsafe | 
| unsafeUseAsCStringLen | Data.ByteString.Unsafe | 
| unsafeWithForeignPtr |  | 
| 1 (Function) | GHC.ForeignPtr | 
| 2 (Function) | Data.ByteString.Internal | 
| 3 (Function) | Data.Text.Internal.Functions | 
| unsafeWrite |  | 
| 1 (Function) | Data.Text.Internal.Unsafe.Char | 
| 2 (Function) | Data.Text.Array | 
| unsafeWriteIOArray | GHC.IOArray | 
| unsafeWriteSTArray | GHC.Arr | 
| UnsatisfiedConstraints | GHC.IO.Exception | 
| unsetEnv |  | 
| 1 (Function) | System.Environment.Blank | 
| 2 (Function) | System.Environment | 
| 3 (Function) | System.Posix.Env.ByteString, System.Posix.ByteString | 
| 4 (Function) | System.Posix.Env, System.Posix | 
| unsnoc |  | 
| 1 (Function) | Distribution.Utils.Generic | 
| 2 (Function) | Data.ByteString.Char8 | 
| 3 (Function) | Data.ByteString.Lazy.Char8 | 
| 4 (Function) | Data.ByteString.Lazy | 
| 5 (Function) | Data.ByteString | 
| 6 (Function) | Data.Text.Lazy | 
| 7 (Function) | Data.Text | 
| unsnocNE | Distribution.Utils.Generic | 
| UnspecifiedLicense | Distribution.License, Distribution.Make, Distribution.Simple | 
| unstableSort | Data.Sequence.Internal.Sorting, Data.Sequence | 
| unstableSortBy | Data.Sequence.Internal.Sorting, Data.Sequence | 
| unstableSortOn | Data.Sequence.Internal.Sorting, Data.Sequence | 
| unstream |  | 
| 1 (Function) | Data.Text.Internal.Lazy.Fusion | 
| 2 (Function) | Data.Text.Internal.Encoding.Fusion | 
| 3 (Function) | Data.Text.Internal.Lazy.Encoding.Fusion | 
| 4 (Function) | Data.Text.Internal.Fusion | 
| unstreamChunks | Data.Text.Internal.Lazy.Fusion | 
| unstreamList | Data.Text.Internal.Fusion.Common | 
| UnsupportedClosure | GHC.Exts.Heap.Closures, GHC.Exts.Heap | 
| unsupportedExtensions | Distribution.Simple.Compiler, Distribution.Simple | 
| unsupportedLanguages | Distribution.Simple.Compiler, Distribution.Simple | 
| UnsupportedOperation |  | 
| 1 (Data Constructor) | GHC.IO.Exception | 
| 2 (Data Constructor) | System.Directory.Internal.Prelude | 
| unsupportedOperation | GHC.IO.Exception | 
| untangle | GHC.IO.Exception | 
| until |  | 
| 1 (Function) | Distribution.Compat.Prelude.Internal | 
| 2 (Function) | GHC.Base, Prelude | 
| 3 (Function) | System.Directory.Internal.Prelude | 
| untrimmedStrategy | Data.ByteString.Builder.Internal, Data.ByteString.Builder.Extra, Data.ByteString.Lazy.Builder.Extras | 
| unType | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| unTypeCode | Language.Haskell.TH.Syntax, Language.Haskell.TH | 
| unTypeQ | Language.Haskell.TH.Syntax | 
| unUnitId | Distribution.Types.UnitId, Distribution.Package, Distribution.Make, Distribution.Simple | 
| unUnqualComponentName | Distribution.Types.UnqualComponentName, Distribution.PackageDescription | 
| unUnqualComponentNameST | Distribution.Types.UnqualComponentName, Distribution.PackageDescription | 
| unvalidateBenchmark | Distribution.PackageDescription.FieldGrammar | 
| unvalidateTestSuite | Distribution.PackageDescription.FieldGrammar | 
| unwords |  | 
| 1 (Function) | Distribution.Compat.Prelude.Internal | 
| 2 (Function) | Data.String, Data.List, GHC.OldList, Prelude | 
| 3 (Function) | Data.ByteString.Char8 | 
| 4 (Function) | Data.ByteString.Lazy.Char8 | 
| 5 (Function) | System.Directory.Internal.Prelude | 
| 6 (Function) | Data.Text.Lazy | 
| 7 (Function) | Data.Text | 
| unwrapArrow | Control.Applicative | 
| unwrapHandles | System.Process.Internals | 
| unwrapMonad | Control.Applicative | 
| unwrapMonoid | Data.Semigroup | 
| unzip |  | 
| 1 (Function) | Distribution.Compat.Prelude.Internal | 
| 2 (Function) | Data.List.NonEmpty | 
| 3 (Function) | GHC.List, Data.List, GHC.OldList, Prelude | 
| 4 (Function) | Data.ByteString.Char8 | 
| 5 (Function) | Data.ByteString.Lazy | 
| 6 (Function) | Data.ByteString | 
| 7 (Function) | Data.Sequence.Internal, Data.Sequence | 
| 8 (Function) | System.Directory.Internal.Prelude | 
| unzip3 |  | 
| 1 (Function) | Distribution.Compat.Prelude.Internal | 
| 2 (Function) | GHC.List, Data.List, GHC.OldList, Prelude | 
| 3 (Function) | System.Directory.Internal.Prelude | 
| unzip4 | Data.List, GHC.OldList | 
| unzip5 | Data.List, GHC.OldList | 
| unzip6 | Data.List, GHC.OldList | 
| unzip7 | Data.List, GHC.OldList | 
| unzipWith | Data.Sequence.Internal, Data.Sequence | 
| update |  | 
| 1 (Function) | Data.IntMap.Strict.Internal, Data.IntMap.Strict | 
| 2 (Function) | Data.Map.Strict.Internal, Data.Map.Strict | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Lazy, Data.IntMap | 
| 4 (Function) | Data.Map.Internal, Data.Map.Lazy, Data.Map | 
| 5 (Function) | Data.Sequence.Internal, Data.Sequence | 
| updateAt |  | 
| 1 (Function) | Data.Map.Strict.Internal, Data.Map.Strict | 
| 2 (Function) | Data.Map.Internal, Data.Map.Lazy, Data.Map | 
| updateLookupWithKey |  | 
| 1 (Function) | Data.IntMap.Strict.Internal, Data.IntMap.Strict | 
| 2 (Function) | Data.Map.Strict.Internal, Data.Map.Strict | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Lazy, Data.IntMap | 
| 4 (Function) | Data.Map.Internal, Data.Map.Lazy, Data.Map | 
| updateMax |  | 
| 1 (Function) | Data.IntMap.Strict.Internal, Data.IntMap.Strict | 
| 2 (Function) | Data.Map.Strict.Internal, Data.Map.Strict | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Lazy, Data.IntMap | 
| 4 (Function) | Data.Map.Internal, Data.Map.Lazy, Data.Map | 
| updateMaxWithKey |  | 
| 1 (Function) | Data.IntMap.Strict.Internal, Data.IntMap.Strict | 
| 2 (Function) | Data.Map.Strict.Internal, Data.Map.Strict | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Lazy, Data.IntMap | 
| 4 (Function) | Data.Map.Internal, Data.Map.Lazy, Data.Map | 
| updateMin |  | 
| 1 (Function) | Data.IntMap.Strict.Internal, Data.IntMap.Strict | 
| 2 (Function) | Data.Map.Strict.Internal, Data.Map.Strict | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Lazy, Data.IntMap | 
| 4 (Function) | Data.Map.Internal, Data.Map.Lazy, Data.Map | 
| updateMinWithKey |  | 
| 1 (Function) | Data.IntMap.Strict.Internal, Data.IntMap.Strict | 
| 2 (Function) | Data.Map.Strict.Internal, Data.Map.Strict | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Lazy, Data.IntMap | 
| 4 (Function) | Data.Map.Internal, Data.Map.Lazy, Data.Map | 
| updatePackageDescription | Distribution.Types.PackageDescription, Distribution.PackageDescription | 
| updateParserState | Text.Parsec.Prim, Text.Parsec | 
| updatePosChar | Text.Parsec.Pos, Text.ParserCombinators.Parsec.Pos | 
| updatePosString | Text.Parsec.Pos, Text.ParserCombinators.Parsec.Pos | 
| updateProgram | Distribution.Simple.Program.Db, Distribution.Simple.Program | 
| updateState | Text.Parsec.Prim, Text.Parsec, Text.ParserCombinators.Parsec.Prim, Text.ParserCombinators.Parsec | 
| updateTimeout | GHC.Event | 
| updateTix | Trace.Hpc.Reflect | 
| updateWithKey |  | 
| 1 (Function) | Data.IntMap.Strict.Internal, Data.IntMap.Strict | 
| 2 (Function) | Data.Map.Strict.Internal, Data.Map.Strict | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Lazy, Data.IntMap | 
| 4 (Function) | Data.Map.Internal, Data.Map.Lazy, Data.Map | 
| UPDATE_FRAME | GHC.Exts.Heap.ClosureTypes, GHC.Exts.Heap | 
| UPL_1_0 | Distribution.SPDX.LicenseId, Distribution.SPDX | 
| upper |  | 
| 1 (Function) | Distribution.Compat.CharParsing | 
| 2 (Function) | Text.Parsec.Char, Text.Parsec, Text.ParserCombinators.Parsec.Char, Text.ParserCombinators.Parsec | 
| UpperBound |  | 
| 1 (Data Constructor) | Distribution.Types.VersionInterval, Distribution.Version, Distribution.Simple | 
| 2 (Type/Class) | Distribution.Types.VersionInterval, Distribution.Version, Distribution.Simple | 
| upperBound | Data.Text.Internal.Fusion.Size | 
| UppercaseLetter | GHC.Unicode, Data.Char | 
| upperMapping | Data.Text.Internal.Fusion.CaseMapping | 
| URec | GHC.Generics | 
| urgentDataAvailable | System.Posix.Signals, System.Posix.Signals.Exts, System.Posix.ByteString, System.Posix | 
| URL | Text.XHtml.Strict, Text.XHtml.Frameset, Text.XHtml.Transitional, Text.XHtml | 
| usageAlternatives | Distribution.Simple.Command | 
| usageDefault | Distribution.Simple.Command | 
| usageInfo | System.Console.GetOpt | 
| use | Distribution.Compat.Lens | 
| useAsCString |  | 
| 1 (Function) | Data.ByteString, Data.ByteString.Char8 | 
| 2 (Function) | Data.ByteString.Short.Internal, Data.ByteString.Short | 
| useAsCStringLen |  | 
| 1 (Function) | Data.ByteString, Data.ByteString.Char8 | 
| 2 (Function) | Data.ByteString.Short.Internal, Data.ByteString.Short | 
| useAsPtr | Data.Text.Foreign | 
| usedExtensions | Distribution.Types.BuildInfo, Distribution.PackageDescription | 
| useFile | System.Console.Haskeline | 
| useFileHandle | System.Console.Haskeline | 
| UseHandle | System.Process.Internals, System.Process | 
| usemap | Text.XHtml.Strict, Text.XHtml.Frameset, Text.XHtml.Transitional, Text.XHtml | 
| user | GHC.RTS.Flags | 
| userBug | Distribution.PackageDescription.Utils | 
| UserBuildTarget | Distribution.Simple.BuildTarget | 
| UserBuildTargetProblem | Distribution.Simple.BuildTarget | 
| UserBuildTargetUnrecognised | Distribution.Simple.BuildTarget | 
| userDefinedSignal1 | System.Posix.Signals, System.Posix.Signals.Exts, System.Posix.ByteString, System.Posix | 
| userDefinedSignal2 | System.Posix.Signals, System.Posix.Signals.Exts, System.Posix.ByteString, System.Posix | 
| UserEntry |  | 
| 1 (Data Constructor) | System.Posix.User, System.Posix.ByteString, System.Posix | 
| 2 (Type/Class) | System.Posix.User, System.Posix.ByteString, System.Posix | 
| UserError | GHC.IO.Exception | 
| userError |  | 
| 1 (Function) | Distribution.Compat.Prelude.Internal | 
| 2 (Function) | GHC.IO.Exception, System.IO.Error, Prelude | 
| 3 (Function) | System.Directory.Internal.Prelude | 
| userErrorType | System.IO.Error | 
| userGecos | System.Posix.User, System.Posix.ByteString, System.Posix | 
| userGroupID | System.Posix.User, System.Posix.ByteString, System.Posix | 
| UserHooks |  | 
| 1 (Data Constructor) | Distribution.Simple.UserHooks, Distribution.Simple | 
| 2 (Type/Class) | Distribution.Simple.UserHooks, Distribution.Simple | 
| UserID |  | 
| 1 (Type/Class) | System.Posix.Types | 
| 2 (Type/Class) | System.Process.Internals | 
| 3 (Type/Class) | System.Posix.ByteString, System.Posix | 
| userID | System.Posix.User, System.Posix.ByteString, System.Posix | 
| UserInterrupt | GHC.IO.Exception, Control.Exception, Control.Exception.Base | 
| userMaybeSpecifyPath | Distribution.Simple.Program.Db, Distribution.Simple.Program | 
| userName | System.Posix.User, System.Posix.ByteString, System.Posix | 
| UserPackageDB | Distribution.Simple.Compiler, Distribution.Simple | 
| userPassword | System.Posix.User, System.Posix.ByteString, System.Posix | 
| userShell | System.Posix.User, System.Posix.ByteString, System.Posix | 
| UserSpecified | Distribution.Simple.Program.Types, Distribution.Simple.Program | 
| userSpecifiedArgs | Distribution.Simple.Program.Db, Distribution.Simple.Program | 
| userSpecifyArgs | Distribution.Simple.Program.Db, Distribution.Simple.Program | 
| userSpecifyArgss | Distribution.Simple.Program.Db, Distribution.Simple.Program | 
| userSpecifyPath | Distribution.Simple.Program.Db, Distribution.Simple.Program | 
| userSpecifyPaths | Distribution.Simple.Program.Db, Distribution.Simple.Program | 
| userTime | System.Posix.Process.ByteString, System.Posix.Process, System.Posix.ByteString, System.Posix | 
| useSandboxThread | GHCi.Message | 
| usesTemplateHaskellOrQQ | Distribution.Types.BuildInfo, Distribution.PackageDescription | 
| use_process_jobs | System.Process.Internals, System.Process | 
| usleep | System.Posix.Unistd, System.Posix.ByteString, System.Posix | 
| ut1ToLocalTime | Data.Time.LocalTime, Data.Time | 
| utc | Data.Time.LocalTime, Data.Time | 
| utcDayLength | Data.Time.Clock.TAI | 
| utctDay | Data.Time.Clock, Data.Time | 
| utctDayTime | Data.Time.Clock, Data.Time | 
| UTCTime |  | 
| 1 (Data Constructor) | Data.Time.Clock, Data.Time | 
| 2 (Type/Class) | Data.Time.Clock, Data.Time | 
| utcTimeFormat | Data.Time.Format.ISO8601 | 
| utcTimeToPOSIXSeconds | Data.Time.Clock.POSIX | 
| utcToLocalTime | Data.Time.LocalTime, Data.Time | 
| utcToLocalTimeOfDay | Data.Time.LocalTime, Data.Time | 
| utcToLocalZonedTime | Data.Time.LocalTime, Data.Time | 
| utcToSystemTime | Data.Time.Clock.System | 
| utcToTAITime | Data.Time.Clock.TAI | 
| utcToZonedTime | Data.Time.LocalTime, Data.Time | 
| utf16 |  | 
| 1 (Function) | System.IO, GHC.IO.Encoding | 
| 2 (Function) | GHC.IO.Encoding.UTF16 | 
| utf16be |  | 
| 1 (Function) | System.IO, GHC.IO.Encoding | 
| 2 (Function) | GHC.IO.Encoding.UTF16 | 
| utf16be_decode | GHC.IO.Encoding.UTF16 | 
| utf16be_encode | GHC.IO.Encoding.UTF16 | 
| utf16le |  | 
| 1 (Function) | System.IO, GHC.IO.Encoding | 
| 2 (Function) | GHC.IO.Encoding.UTF16 | 
| utf16le_decode | GHC.IO.Encoding.UTF16 | 
| utf16le_encode | GHC.IO.Encoding.UTF16 | 
| utf16_decode | GHC.IO.Encoding.UTF16 | 
| utf16_encode | GHC.IO.Encoding.UTF16 | 
| utf32 |  | 
| 1 (Function) | System.IO, GHC.IO.Encoding | 
| 2 (Function) | GHC.IO.Encoding.UTF32 | 
| utf32be |  | 
| 1 (Function) | System.IO, GHC.IO.Encoding | 
| 2 (Function) | GHC.IO.Encoding.UTF32 | 
| utf32be_decode | GHC.IO.Encoding.UTF32 | 
| utf32be_encode | GHC.IO.Encoding.UTF32 | 
| utf32le |  | 
| 1 (Function) | System.IO, GHC.IO.Encoding | 
| 2 (Function) | GHC.IO.Encoding.UTF32 | 
| utf32le_decode | GHC.IO.Encoding.UTF32 | 
| utf32le_encode | GHC.IO.Encoding.UTF32 | 
| utf32_decode | GHC.IO.Encoding.UTF32 | 
| utf32_encode | GHC.IO.Encoding.UTF32 | 
| utf8 |  | 
| 1 (Function) | System.IO, GHC.IO.Encoding | 
| 2 (Function) | GHC.IO.Encoding.UTF8 | 
| utf8_bom |  | 
| 1 (Function) | System.IO, GHC.IO.Encoding | 
| 2 (Function) | GHC.IO.Encoding.UTF8 | 
| UWord |  | 
| 1 (Data Constructor) | GHC.Generics | 
| 2 (Type/Class) | GHC.Generics | 
| uWord# | GHC.Generics | 
| U_boot_exception_2_0 | Distribution.SPDX.LicenseExceptionId, Distribution.SPDX |