...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Return a const reverse iterator to the element following the last element of the reversed container.
const_reverse_iterator crend() const;
The pointed-to element corresponds to the element preceding the first element of the non-reversed container. This element acts as a placeholder, attempting to access it results in undefined behavior.
Constant.
No-throw guarantee.