27 Iterators library [iterators]

27.5 Iterator adaptors [predef.iterators]

27.5.2 Insert iterators [insert.iterators]

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

27.5.2.2.3 back_­insert_­iterator​::​operator* [back.insert.iter.op*]

back_insert_iterator& operator*();