...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Return an iterator to the end.
const_iterator cend() const;
Returns an iterator to the character following the last character of the string. This character acts as a placeholder, attempting to access it results in undefined behavior.
Constant.
No-throw guarantee.