| JavaScript | Language.Haskell.TH.Syntax, Language.Haskell.TH |
| javaScript | Language.Haskell.TH.Lib.Internal, Language.Haskell.TH.Lib, Language.Haskell.TH |
| JavaScriptCallConv | GHC.Types.ForeignCall |
| JavaScriptFFI | GHC.LanguageExtensions.Type, GHC.LanguageExtensions, Language.Haskell.TH.LanguageExtensions, Language.Haskell.TH.Syntax, Language.Haskell.TH |
| JoinArity | GHC.Types.Basic, GHC.Types.Id.Info |
| joinCode | Language.Haskell.TH.Syntax, Language.Haskell.TH |
| JoinId | |
| 1 (Type/Class) | GHC.Types.Var, GHC.Types.Id |
| 2 (Data Constructor) | GHC.Types.Id.Info |
| joinMIdKey | GHC.Builtin.Names |
| joinMName | GHC.Builtin.Names |
| joinPointBindings_maybe | GHC.Core.SimpleOpt |
| joinPointBinding_maybe | GHC.Core.SimpleOpt |
| joinRhsArity | GHC.Core.Opt.Arity |
| JSArray | GHC.Utils.Json |
| JSBool | GHC.Utils.Json |
| JSInt | GHC.Utils.Json |
| JSNull | GHC.Utils.Json |
| JSObject | GHC.Utils.Json |
| json | GHC.Utils.Json |
| JsonDoc | GHC.Utils.Json |
| jsonLogAction | GHC.Utils.Logger |
| JSString | GHC.Utils.Json |
| JumpTable | GHC.Cmm.Switch |
| Just | GHC.Prelude, GHC.Data.Maybe |
| justDataCon | GHC.Builtin.Types |
| justDataConKey | GHC.Builtin.Names |
| justDataConName | GHC.Builtin.Types |
| justName | Language.Haskell.TH.Syntax |
| JustO | GHC.Cmm.Dataflow.Block |