# Introduction

This is the Doxygen API documentation for CLI11 parser. There is a friendly introduction to CLI11 on the [Github page](https://github.com/henryiii/CLI11).

The main classes are:

| Name          | Where used                          |
|---------------|-------------------------------------|
|CLI::Option    | Options, stored in the app          |
|CLI::App       | The main application or subcommands |


Groups of related topics:

| Name                 | Description                                    |
|----------------------|------------------------------------------------|
| @ref error_group     | Errors that can be thrown                      |
| @ref validator_group | Common validators used in CLI::Option::check() |