Index - U
| ulCode | FP.Console |
| uncons | FP.Core, FP |
| uncurry | FP.Core, FP |
| undefined | FP.Core, FP |
| underline | FP.Pretty |
| unDocM | FP.Pretty |
| unEndo | FP.Core, FP |
| UniMonad | Lang.CPS.Semantics, Lang.CPS |
| union | FP.Core, FP |
| uniques | FP.Core, FP |
| Unit | FP.Core, FP |
| unit | FP.Core, FP |
| Unit2 | FP.Core, FP |
| unit2 | FP.Core, FP |
| UniTime | Lang.CPS.Semantics, Lang.CPS |
| UniVal | Lang.CPS.Semantics, Lang.CPS |
| Universal | FP.Core, FP |
| unKleisliEndo | FP.Core, FP |
| unParser | FP.Parser |
| unReaderT | FP.Core, FP |
| unRWST | FP.Core, FP |
| unsafe_coerce | FP.Core, FP |
| unStateT | FP.Core, FP |
| unStStateT | Lang.Lam.Passes, Lang.Lam |
| unzip | FP.Core, FP |
| update | FP.Core, FP |
| updateM | FP.Core, FP |