Index - O
| ObjectBinder | Language.PureScript.AST.Binders, Language.PureScript.AST, Language.PureScript | 
| ObjectConstructor | Language.PureScript.AST.Declarations, Language.PureScript.AST, Language.PureScript | 
| ObjectGetter | Language.PureScript.AST.Declarations, Language.PureScript.AST, Language.PureScript | 
| ObjectLiteral | |
| 1 (Data Constructor) | Language.PureScript.CoreFn.Literals, Language.PureScript.CoreFn | 
| 2 (Data Constructor) | Language.PureScript.AST.Declarations, Language.PureScript.AST, Language.PureScript | 
| ObjectUpdate | |
| 1 (Data Constructor) | Language.PureScript.CoreFn.Expr, Language.PureScript.CoreFn | 
| 2 (Data Constructor) | Language.PureScript.AST.Declarations, Language.PureScript.AST, Language.PureScript | 
| ObjectUpdater | Language.PureScript.AST.Declarations, Language.PureScript.AST, Language.PureScript | 
| one | Language.PureScript.Constants | 
| onErrorMessages | Language.PureScript.Errors, Language.PureScript | 
| onTypesInErrorMessageM | Language.PureScript.Errors, Language.PureScript | 
| Op | Language.PureScript.Names, Language.PureScript | 
| OperatorSection | Language.PureScript.AST.Declarations, Language.PureScript.AST, Language.PureScript | 
| optimize | Language.PureScript.CodeGen.JS.Optimizer | 
| Options | |
| 1 (Type/Class) | Language.PureScript.Options, Language.PureScript | 
| 2 (Data Constructor) | Language.PureScript.Options, Language.PureScript | 
| optionsMain | Language.PureScript.Options, Language.PureScript | 
| optionsNoComments | Language.PureScript.Options, Language.PureScript | 
| optionsNoMagicDo | Language.PureScript.Options, Language.PureScript | 
| optionsNoOptimizations | Language.PureScript.Options, Language.PureScript | 
| optionsNoTco | Language.PureScript.Options, Language.PureScript | 
| optionsRequirePath | Language.PureScript.Options, Language.PureScript | 
| optionsVerboseErrors | Language.PureScript.Options, Language.PureScript | 
| Or | Language.PureScript.CodeGen.JS.AST, Language.PureScript.CodeGen.JS, Language.PureScript.CodeGen | 
| ordBoolean | Language.PureScript.Constants | 
| ordChar | Language.PureScript.Constants | 
| ordInt | Language.PureScript.Constants | 
| ordNumber | Language.PureScript.Constants | 
| ordString | Language.PureScript.Constants | 
| OrphanFixityDeclaration | Language.PureScript.Errors, Language.PureScript | 
| OrphanInstance | Language.PureScript.Errors, Language.PureScript | 
| OrphanTypeDeclaration | Language.PureScript.Errors, Language.PureScript | 
| OtherError | |
| 1 (Type/Class) | Language.PureScript.Publish.ErrorsWarnings | 
| 2 (Data Constructor) | Language.PureScript.Publish.ErrorsWarnings | 
| otherError | Language.PureScript.Publish | 
| OtherHint | Language.PureScript.Errors, Language.PureScript | 
| OtherModule | Language.PureScript.Docs.RenderedCode.Types, Language.PureScript.Docs.RenderedCode, Language.PureScript.Docs.Types, Language.PureScript.Docs | 
| outputWith | Language.PureScript.Docs.RenderedCode.Types, Language.PureScript.Docs.RenderedCode, Language.PureScript.Docs | 
| OverlappingArgNames | Language.PureScript.Errors, Language.PureScript | 
| OverlappingInstances | Language.PureScript.Errors, Language.PureScript | 
| OverlappingNamesInLet | Language.PureScript.Errors, Language.PureScript | 
| OverlappingPattern | Language.PureScript.Errors, Language.PureScript |