23 Strings library [strings]

23.4 String classes [string.classes]

23.4.3 Class template basic_­string [basic.string]

23.4.3.4 Iterator support [string.iterators]

constexpr iterator begin() noexcept; constexpr const_iterator begin() const noexcept; constexpr const_iterator cbegin() const noexcept;
Returns: An iterator referring to the first character in the string.
constexpr iterator end() noexcept; constexpr const_iterator end() const noexcept; constexpr const_iterator cend() const noexcept;
Returns: An iterator which is the past-the-end value.
constexpr reverse_iterator rbegin() noexcept; constexpr const_reverse_iterator rbegin() const noexcept; constexpr const_reverse_iterator crbegin() const noexcept;
Returns: An iterator which is semantically equivalent to reverse_­iterator(end()).
constexpr reverse_iterator rend() noexcept; constexpr const_reverse_iterator rend() const noexcept; constexpr const_reverse_iterator crend() const noexcept;
Returns: An iterator which is semantically equivalent to reverse_­iterator(begin()).