sharg::detail::is_container_option Concept Reference

Whether the option type is considered to be a container. More...

#include <sharg/detail/concept.hpp>

Concept definition

template<typename option_type>
concept sharg::detail::is_container_option =  (!std::is_same_v<std::remove_cvref_t<option_type>, std::string>) &&
                              requires (option_type container,
                                        typename std::ranges::range_value_t<option_type> value)
                              {
                                  { container.push_back(value) };
                              }

Detailed Description

Whether the option type is considered to be a container.

When adding options or positionial arguments, a distinction needs to be made between container and non-container option_types.

In general, all standard library containers except std::string can be considered containers.

In order to be considered a container, the option_type must:

• not be std::string
• define a member type value_type
• provide a member function push_back(value_type)

This entity is not part of the SeqAn API. Do not rely on it in your applications.