std::experimental::ostream_joiner<DelimT,CharT,Traits>::operator++

From cppreference.com
ostream_joiner& operator++() noexcept;
(library fundamentals TS v2)
ostream_joiner& operator++( int ) noexcept;
(library fundamentals TS v2)

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 stream.

Parameters

(none)

Return value

*this