24 Iterators library [iterators]

24.5 Iterator adaptors [predef.iterators]

24.5.2 Insert iterators [insert.iterators]

24.5.2.2 back_insert_iterator operations [back.insert.iter.ops]

24.5.2.2.4 back_insert_iterator::operator++ [back.insert.iter.op++]

back_insert_iterator<Container>& operator++(); back_insert_iterator<Container> operator++(int);

Returns: *this.