20 Memory management library [mem]

20.3 Pointer tagging [ptrtag]

20.3.2 Class template pointer_tag_pair [ptrtag.pair]

20.3.2.5 Accessors [ptrtag.pair.accessors]

constexpr pointer_type pointer() const noexcept;
Returns: The pointer value represented by *this.
constexpr tag_type tag() const noexcept;
Returns: The tag value represented by *this.