...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Retrieves the underlying value as an uint64
(unchecked access).
constexpr std::uint64_t get_uint64() const;
this->is_uint64()
== true
(if violated, results in undefined behavior).
No-throw guarantee.