| ArgumentError | |
| BooleanFlag | |
| FlagDocumentation | Encapsulates documentation about a BooleanFlag or ValuedFlag. |
| FlagParseError | |
| PositionalArgument | |
| PositionalArguments | |
| Program | A built program that can parse arguments and execute a main function against those arguments. |
| ProgramBase | |
| ProgramBuilder | Entry point to the library and the way to start constructing a Program to be executed. |
| ProgramError | Base class for any error having to do with ProgramBuilder. |
| ProgramWithAction | |
| ProgramWithSubcommands | |
| TooManyArgumentsError | |
| UnrecognizedSubcommandError | |
| ValuedFlag | |