constexpr front_insert_iterator();
Effects: Value-initializes container.
explicit front_insert_iterator(Container& x);
Effects: Initializes container with addressof(x).
front_insert_iterator&
operator=(const value_type_t<Container>& value);
Effects: Equivalent to container->push_front(value).
Returns: *this.
front_insert_iterator&
operator=(value_type_t<Container>&& value);
Effects: Equivalent to container->push_front(std::move(value)).
Returns: *this.
front_insert_iterator& operator*();
Returns: *this.
front_insert_iterator& operator++();
front_insert_iterator operator++(int);
Returns: *this.
template <class Container>
front_insert_iterator<Container> front_inserter(Container& x);
Returns: front_insert_iterator<Container>(x).