Index - U
| umNextSkolem | Language.PureScript.Errors, Language.PureScript | 
| umNextUnknown | Language.PureScript.Errors, Language.PureScript | 
| umSkolemMap | Language.PureScript.Errors, Language.PureScript | 
| umUnknownMap | Language.PureScript.Errors, Language.PureScript | 
| UnableToParseModule | Language.PureScript.Bundle | 
| UnacceptableVersion | Language.PureScript.Publish.ErrorsWarnings | 
| uname | Language.PureScript.Parser.Lexer, Language.PureScript.Parser, Language.PureScript | 
| uname' | Language.PureScript.Parser.Lexer, Language.PureScript.Parser, Language.PureScript | 
| UnaryMinus | Language.PureScript.AST.Declarations, Language.PureScript.AST, Language.PureScript | 
| UnaryOperator | Language.PureScript.CodeGen.JS.AST, Language.PureScript.CodeGen.JS, Language.PureScript.CodeGen | 
| UndeclaredDependency | Language.PureScript.Publish.ErrorsWarnings | 
| Undefined | Language.PureScript.Environment, Language.PureScript | 
| undefined | Language.PureScript.Constants | 
| UndefinedTypeVariable | Language.PureScript.Errors, Language.PureScript | 
| underscore | Language.PureScript.Parser.Lexer, Language.PureScript.Parser, Language.PureScript | 
| unifiesWith | Language.PureScript.TypeChecker.Unify | 
| unifyRows | Language.PureScript.TypeChecker.Unify | 
| unifyTypes | Language.PureScript.TypeChecker.Unify | 
| unit | Language.PureScript.Constants | 
| Unknown | Language.PureScript.TypeChecker.Monad, Language.PureScript.TypeChecker, Language.PureScript | 
| UnknownDataConstructor | Language.PureScript.Errors, Language.PureScript | 
| UnknownExportDataConstructor | Language.PureScript.Errors, Language.PureScript | 
| UnknownExportModule | Language.PureScript.Errors, Language.PureScript | 
| UnknownExportType | Language.PureScript.Errors, Language.PureScript | 
| UnknownExportTypeClass | Language.PureScript.Errors, Language.PureScript | 
| UnknownExportValue | Language.PureScript.Errors, Language.PureScript | 
| UnknownImportDataConstructor | Language.PureScript.Errors, Language.PureScript | 
| UnknownImportType | Language.PureScript.Errors, Language.PureScript | 
| UnknownImportTypeClass | Language.PureScript.Errors, Language.PureScript | 
| UnknownImportValue | Language.PureScript.Errors, Language.PureScript | 
| UnknownModule | Language.PureScript.Errors, Language.PureScript | 
| UnknownType | Language.PureScript.Errors, Language.PureScript | 
| UnknownTypeClass | Language.PureScript.Errors, Language.PureScript | 
| UnknownTypeConstructor | Language.PureScript.Errors, Language.PureScript | 
| UnknownValue | Language.PureScript.Errors, Language.PureScript | 
| unMake | Language.PureScript.Make, Language.PureScript | 
| UnnecessaryFFIModule | Language.PureScript.Errors, Language.PureScript | 
| unsafeIndex | Language.PureScript.Constants | 
| unSupplyT | Control.Monad.Supply, Language.PureScript | 
| UnsupportedExport | Language.PureScript.Bundle | 
| UnsupportedModulePath | Language.PureScript.Bundle | 
| unThunk | Language.PureScript.CodeGen.JS.Optimizer.Inliner | 
| untilE | Language.PureScript.Constants | 
| UnusedDctorExplicitImport | Language.PureScript.Errors, Language.PureScript | 
| UnusedDctorImport | Language.PureScript.Errors, Language.PureScript | 
| UnusedExplicitImport | Language.PureScript.Errors, Language.PureScript | 
| UnusedImport | Language.PureScript.Errors, Language.PureScript | 
| UnusedTypeVar | Language.PureScript.Errors, Language.PureScript | 
| unwrapErrorMessage | Language.PureScript.Errors, Language.PureScript | 
| updateReExports | Language.PureScript.Docs.Convert.ReExports | 
| UploadedPackage | Language.PureScript.Docs.Types, Language.PureScript.Docs | 
| UsedImports | Language.PureScript.Linter.Imports, Language.PureScript.Linter, Language.PureScript | 
| usedTypeVariables | Language.PureScript.Types, Language.PureScript | 
| UserError | |
| 1 (Type/Class) | Language.PureScript.Publish.ErrorsWarnings | 
| 2 (Data Constructor) | Language.PureScript.Publish.ErrorsWarnings | 
| userError | Language.PureScript.Publish |