9 Iterators library [iterators]

9.7 Iterator adaptors [iterators.predef]

9.7.2 Insert iterators [iterators.insert]

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

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

back_insert_iterator& operator++(); back_insert_iterator operator++(int);

1

Returns: *this.