std::insert_iterator<Container>::insert_iterator

insert_iterator() = default;	(1)	(since C++20)
	(2)
insert_iterator( Container& c, typename Container::iterator i );		(until C++20)
constexpr insert_iterator( Container& c, ranges::iterator_t<Container> i );		(since C++20)

1) Initializes the underlying pointer to container with nullptr and value-initializes the underlying iterator. (since C++20)

2) Initializes the underlying pointer to the container to std::addressof(c) and the underlying iterator to i.

c	-	container to initialize the inserter with
i	-	iterator to initialize the inserter with

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