const_reverse_iterator crend() const noexcept;
Returns an iterator to the reverse-end; that is, one before the first element. This element acts as a placeholder, attempting to access it results in undefined behavior.
reverse iterator to the element following the last element
No-throw guarantee: this member function never throws exceptions.
Constant.
??? example
The following code shows an example for `eend()`. ```cpp --8<-- "examples/crend.cpp" ``` Output: ```json --8<-- "examples/crend.output" ```