| UnaryArithOpHs | Indigo.Lorentz, Indigo |
| UnaryArithResHs | Indigo.Lorentz, Indigo.Lorentz, Indigo, Indigo |
| unaryOp | Indigo.Internal.Expr.Compilation, Indigo.Internal.Expr, Indigo.Internal, Indigo |
| unaryOpFlat | Indigo.Internal.Expr.Compilation, Indigo.Internal.Expr, Indigo.Internal, Indigo |
| unBigMap | Indigo.Lorentz, Indigo |
| uncons | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| uncurry | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| Undefined | |
| 1 (Type/Class) | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| 2 (Data Constructor) | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| undefined | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| underflowError | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| unFieldObj | Indigo.Internal.Object, Indigo.Internal, Indigo |
| unfoldr | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| unFutureContract | Indigo.Lorentz, Indigo |
| unHasEntrypoints | Indigo.Lorentz, Indigo |
| unHash | Indigo.Lorentz, Indigo |
| UnicodeException | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| unIndigoM | Indigo.Frontend.Program, Indigo.Frontend, Indigo |
| uninterruptibleMask | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| Unit | Indigo.Backend.Scope, Indigo.Backend |
| unless | |
| 1 (Function) | Indigo.Backend.Prelude |
| 2 (Function) | Indigo.Frontend.Language, Indigo.Frontend, Indigo |
| unlessM | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| unlines | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| unLorentzInstr | Indigo.Lorentz, Indigo |
| UnName | Indigo.Internal.Expr.Types, Indigo.Internal.Expr, Indigo.Internal, Indigo |
| unName | Indigo.Internal.Expr.Symbolic, Indigo.Internal.Expr, Indigo.Internal, Indigo |
| unNamedFieldExpr | Indigo.Internal.Expr.Types, Indigo.Internal.Expr, Indigo.Internal, Indigo |
| Unpack | Indigo.Internal.Expr.Types, Indigo.Internal.Expr, Indigo.Internal, Indigo |
| unpack | Indigo.Internal.Expr.Symbolic, Indigo.Internal.Expr, Indigo.Internal, Indigo |
| unPacked | Indigo.Lorentz, Indigo |
| UnpackRaw | Indigo.Internal.Expr.Types, Indigo.Internal.Expr, Indigo.Internal, Indigo |
| unpackRaw | Indigo.Internal.Expr.Symbolic, Indigo.Internal.Expr, Indigo.Internal, Indigo |
| UnpackUParam | Indigo.Lorentz, Indigo |
| unpackUParam | Indigo.Lorentz, Indigo |
| unParamBuilder | Indigo.Lorentz, Indigo |
| unParameterWraper | Indigo.Lorentz, Indigo |
| unSIS | Indigo.Internal.SIS, Indigo.Internal, Indigo |
| UnspecifiedError | |
| 1 (Data Constructor) | Indigo.Lorentz, Indigo |
| 2 (Type/Class) | Indigo.Lorentz, Indigo |
| unstableNub | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| unTAddress | Indigo.Lorentz, Indigo |
| unTSignature | Indigo.Lorentz, Indigo |
| unwords | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| Unwrap | Indigo.Internal.Expr.Types, Indigo.Internal.Expr, Indigo.Internal, Indigo |
| unwrap | Indigo.Internal.Expr.Symbolic, Indigo.Internal.Expr, Indigo.Internal, Indigo |
| Unwrappable | Indigo.Lorentz, Indigo.Lorentz, Indigo, Indigo |
| unwrapUnsafe_ | Indigo.Lorentz, Indigo |
| unwrapUParam | Indigo.Lorentz, Indigo |
| unzip | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| unzip3 | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| UParam | Indigo.Lorentz, Indigo |
| UParamFallback | Indigo.Lorentz, Indigo |
| uparamFallbackFail | Indigo.Lorentz, Indigo |
| uparamFromAdt | Indigo.Lorentz, Indigo |
| UParamLinearize | Indigo.Lorentz, Indigo |
| UParamLinearized | Indigo.Lorentz, Indigo |
| UParamUnsafe | Indigo.Lorentz, Indigo |
| UParam_ | Indigo.Lorentz, Indigo |
| Update | Indigo.Internal.Expr.Types, Indigo.Internal.Expr, Indigo.Internal, Indigo |
| update | Indigo.Internal.Expr.Symbolic, Indigo.Internal.Expr, Indigo.Internal, Indigo |
| updateClauses | Indigo.Compilation.Sequential |
| updateStorageField | Indigo.Frontend.Language, Indigo.Frontend, Indigo |
| updateVar | Indigo.Backend.Var, Indigo.Backend |
| UpdOpHs | Indigo.Lorentz, Indigo |
| UpdOpKeyHs | Indigo.Lorentz, Indigo.Lorentz, Indigo, Indigo |
| UpdOpParamsHs | Indigo.Lorentz, Indigo.Lorentz, Indigo, Indigo |
| use | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| useHasEntrypointArg | Indigo.Lorentz, Indigo |
| useNumericErrors | Indigo.Lorentz, Indigo |
| usingIndigoState | Indigo.Internal.State, Indigo.Internal, Indigo |
| usingReader | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| usingReaderT | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| usingState | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |
| usingStateT | Indigo.Backend.Prelude, Indigo.Prelude, Indigo |