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