unique

unique_t kumi::unique {}

inlineconstexprnodiscard

Callable object returning a product type with consecutive duplicate types removed (pairwise uniqueness).

On record types, this function operates on the underlying values, not on the fields themselves.

Header file

#include <kumi/algorithm/unique.hpp>

Call Signature

template<product_type T>
constexpr auto unique(T && t);

Parameters

• t: Product Type to process

Return value

• A product type containing elements of t with consecutive duplicates removed.

Helper type

    template<kumi::concepts::product_type T> struct unique
    {
      using type = decltype(kumi::unique(std::declval<T>()));
    };
 
    template<kumi::concepts::product_type T> using unique_t = typename kumi::result::unique<T>::type;
 

Computes the return type of a call to kumi::unique

Examples

Tuple

#include <kumi/kumi.hpp>
#include <iostream>
 
int main()
{
    using tuple = kumi::tuple<int, int, char, int, float, float>;
 
    tuple a = {1, 2, 'x', 3, 1.f, 2.f};
 
    std::cout << kumi::unique(a) << "\n";
}

Record

#include <kumi/kumi.hpp>
#include <iostream>
 
int main()
{
  using namespace kumi::literals;
  auto a = kumi::record{"a"_id = 1, "b"_id = 2, "c"_id = 'x', "d"_id = 3,"e"_id =  1.f, "f"_id = 2.f};
 
  std::cout << kumi::unique(a) << "\n";
}