| octal | Text.Parsec.Token, Text.ParserCombinators.Parsec.Token |
| octDigit | Text.Parsec.Char, Text.Parsec, Text.ParserCombinators.Parsec.Char, Text.ParserCombinators.Parsec |
| Ok | Text.Parsec.Prim, Text.Parsec |
| oneOf | Text.Parsec.Char, Text.Parsec, Text.ParserCombinators.Parsec.Char, Text.ParserCombinators.Parsec |
| Operator | |
| 1 (Type/Class) | Text.Parsec.Expr |
| 2 (Type/Class) | Text.ParserCombinators.Parsec.Expr |
| operator | Text.Parsec.Token, Text.ParserCombinators.Parsec.Token |
| OperatorTable | |
| 1 (Type/Class) | Text.Parsec.Expr |
| 2 (Type/Class) | Text.ParserCombinators.Parsec.Expr |
| opLetter | Text.Parsec.Token, Text.ParserCombinators.Parsec.Language, Text.ParserCombinators.Parsec.Token |
| opStart | Text.Parsec.Token, Text.ParserCombinators.Parsec.Language, Text.ParserCombinators.Parsec.Token |
| option | Text.Parsec.Combinator, Text.Parsec, Text.ParserCombinators.Parsec.Combinator, Text.ParserCombinators.Parsec |
| optional | Text.Parsec.Combinator, Text.Parsec, Text.ParserCombinators.Parsec.Combinator, Text.ParserCombinators.Parsec |
| optionMaybe | Text.Parsec.Combinator, Text.Parsec, Text.ParserCombinators.Parsec.Combinator, Text.ParserCombinators.Parsec |