| LabelVarId | Language.Haskell.Exts.Lexer, Language.Haskell.Exts | 
| Lambda | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| LambdaCase | Language.Haskell.Exts.Extension, Language.Haskell.Exts | 
| lamE | Language.Haskell.Exts.Build, Language.Haskell.Exts | 
| LANGUAGE | Language.Haskell.Exts.Lexer, Language.Haskell.Exts | 
| Language | Language.Haskell.Exts.Extension, Language.Haskell.Exts | 
| LanguagePragma | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| layout | Language.Haskell.Exts.Pretty, Language.Haskell.Exts | 
| LazyTy | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| LCase | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| LeftArrApp | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| LeftArrHighApp | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| LeftArrow | Language.Haskell.Exts.Lexer, Language.Haskell.Exts | 
| LeftArrowTail | Language.Haskell.Exts.Lexer, Language.Haskell.Exts | 
| LeftCurly | Language.Haskell.Exts.Lexer, Language.Haskell.Exts | 
| LeftDblArrowTail | Language.Haskell.Exts.Lexer, Language.Haskell.Exts | 
| LeftHashParen | Language.Haskell.Exts.Lexer, Language.Haskell.Exts | 
| LeftMode | Language.Haskell.Exts.Pretty, Language.Haskell.Exts | 
| LeftParen | Language.Haskell.Exts.Lexer, Language.Haskell.Exts | 
| LeftSection | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| LeftSquare | Language.Haskell.Exts.Lexer, Language.Haskell.Exts | 
| Let | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| letE | Language.Haskell.Exts.Build, Language.Haskell.Exts | 
| letIndent | Language.Haskell.Exts.Pretty, Language.Haskell.Exts | 
| LetStmt | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| letStmt | Language.Haskell.Exts.Build, Language.Haskell.Exts | 
| lexTokenStream | Language.Haskell.Exts.Lexer, Language.Haskell.Exts | 
| lexTokenStreamWithMode | Language.Haskell.Exts.Lexer, Language.Haskell.Exts | 
| LiberalTypeSynonyms | Language.Haskell.Exts.Extension, Language.Haskell.Exts | 
| lineLength | Language.Haskell.Exts.Pretty, Language.Haskell.Exts | 
| linePragmas | Language.Haskell.Exts.Pretty, Language.Haskell.Exts | 
| List | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| ListComp | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| ListCon | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| listE | Language.Haskell.Exts.Build, Language.Haskell.Exts | 
| ListOf |   | 
| 1 (Type/Class) | Language.Haskell.Exts.Parser, Language.Haskell.Exts | 
| 2 (Data Constructor) | Language.Haskell.Exts.Parser, Language.Haskell.Exts | 
| list_cons_name | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| list_con_name | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| list_tycon | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| list_tycon_name | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| Lit | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| Literal | Language.Haskell.Exts.Syntax, Language.Haskell.Exts | 
| Loc |   | 
| 1 (Type/Class) | Language.Haskell.Exts.SrcLoc, Language.Haskell.Exts.Lexer, Language.Haskell.Exts | 
| 2 (Data Constructor) | Language.Haskell.Exts.SrcLoc, Language.Haskell.Exts.Lexer, Language.Haskell.Exts | 
| loc | Language.Haskell.Exts.SrcLoc, Language.Haskell.Exts.Lexer, Language.Haskell.Exts |