9 Iterators library [iterators]

9.7 Iterator adaptors [iterators.predef]

9.7.4 Common iterators [iterators.common]

9.7.4.2 common_iterator operations [common.iter.ops]

9.7.4.2.3 common_iterator::operator* [common.iter.op.star]

decltype(auto) operator*(); decltype(auto) operator*() const requires dereferenceable<const I>;

Requires: !is_sentinel

Effects: Equivalent to: return *iter;