| UndefinedElement | Language.Haskell.GhcMod.Error |
| Underflow | Language.Haskell.GhcMod.Error |
| unGmlT | Language.Haskell.GhcMod.Monad.Newtypes, Language.Haskell.GhcMod.Monad.Types, Language.Haskell.GhcMod.Monad, Language.Haskell.GhcMod.Internal |
| unGmOutT | Language.Haskell.GhcMod.Monad.Newtypes, Language.Haskell.GhcMod.Monad.Types, Language.Haskell.GhcMod.Monad |
| unGmT | Language.Haskell.GhcMod.Monad.Newtypes, Language.Haskell.GhcMod.Monad.Types, Language.Haskell.GhcMod.Monad |
| uninterruptibleMask | Language.Haskell.GhcMod.Error |
| uninterruptibleMask_ | Language.Haskell.GhcMod.Error |
| uniqTempDirName | Language.Haskell.GhcMod.Utils |
| unless | Language.Haskell.GhcMod.Error |
| unLightGhc | Language.Haskell.GhcMod.Monad.Newtypes, Language.Haskell.GhcMod.Monad.Types, Language.Haskell.GhcMod.Monad |
| unloadMappedFile | Language.Haskell.GhcMod.FileMapping, Language.Haskell.GhcMod.Internal, Language.Haskell.GhcMod |
| Unmasked | Language.Haskell.GhcMod.Error |
| UnString | |
| 1 (Type/Class) | Language.Haskell.GhcMod.PathsAndFiles |
| 2 (Data Constructor) | Language.Haskell.GhcMod.PathsAndFiles |
| unString | Language.Haskell.GhcMod.PathsAndFiles |
| unwrapState | Language.Haskell.GhcMod.Options.Help |
| updateHomeModuleGraph | Language.Haskell.GhcMod.HomeModuleGraph |
| UserDb | Language.Haskell.GhcMod.Types |
| UserInterrupt | Language.Haskell.GhcMod.Error |