std::front_insert_iterator::operator++

From cppreference.com

front_insert_iterator& operator++();
(until C++20)
constexpr front_insert_iterator& operator++();
(since C++20)
front_insert_iterator& operator++( int );
(until C++20)
constexpr front_insert_iterator& operator++( int );
(since C++20)

Does nothing. These operator overloads are provided to satisfy the requirements of LegacyOutputIterator. They make it possible for the expressions *iter++=value and *++iter=value to be used to output (insert) a value into the underlying container.

Parameters

(none)

Return value

*this