traits.hpp File Reference

#include <type_traits>
#include <utility>

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Classes
struct	join::overload<>
	overload resolution. More...
struct	join::overload< First, Ts... >
	overload resolution. More...
struct	join::overload< void, Ts... >
	overload resolution. More...

Namespaces
namespace	join

Typedefs
template<typename T , typename... Ts>
using	join::match_t = typename std::invoke_result_t<overload<Ts...>, T>::type
	find a type that match one of the alternatives of a parameter pack.

Variables
template<typename T , typename... Ts>
constexpr std::size_t	join::find_index_v = 0
	get element position in a parameter pack according its type.
template<typename T , typename First , typename... Ts>
constexpr std::size_t	join::find_index_v< T, First, Ts... >
	get element position in a parameter pack according its type.
template<typename T , typename... Ts>
constexpr std::size_t	join::count_v = (std::size_t{0} + ... + std::is_same_v<T, Ts>)
	count the number of time a type appears in a parameter pack.
template<typename T , typename... Ts>
constexpr bool	join::is_unique_v = count_v<T, Ts...> == 1
	check if a type only appears one time in a parameter pack.