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]

24.5.2.2.3 back_insert_iterator::operator* [back.insert.iter.op*]

back_insert_iterator<Container>& operator*();

Returns: *this.