Index - U
| Unconstrained | Control.Monad.Constrained |
| uncurry | Control.Monad.Constrained, Control.Monad.Constrained.Ap |
| undefined | Control.Monad.Constrained, Control.Monad.Constrained.Ap |
| unlines | Control.Monad.Constrained, Control.Monad.Constrained.Ap |
| until | Control.Monad.Constrained, Control.Monad.Constrained.Ap |
| unwords | Control.Monad.Constrained, Control.Monad.Constrained.Ap |
| unwrapConstrained | Control.Monad.Constrained.Ap |
| unzip | Control.Monad.Constrained, Control.Monad.Constrained.Ap |
| unzip3 | Control.Monad.Constrained, Control.Monad.Constrained.Ap |
| userError | Control.Monad.Constrained, Control.Monad.Constrained.Ap |