#ifndef ITER_UNIQUE_JUSTSEEN_HPP

#define ITER_UNIQUE_JUSTSEEN_HPP

#include "groupby.hpp"

#include "imap.hpp"

#include <utility>

#include <iterator>

#include <initializer_list>

namespace iter {

template <typename Container>

auto unique_justseen(Container&& container) {

// explicit return type in lambda so reference types are preserved

return imap([](auto&& group) -> impl::iterator_deref<Container> {

return *std::begin(group.second);

}, groupby(std::forward<Container>(container)));

}

template <typename T>

auto unique_justseen(std::initializer_list<T> il) {

return imap(

[](auto&& group) -> impl::iterator_deref<std::initializer_list<T>> {

return *std::begin(group.second);

},

groupby(il));

}

}

#endif