21 Strings library [strings]

21.4 String view classes [string.view]

21.4.3 Class template basic_­string_­view [string.view.template]

21.4.3.3 Iterator support [string.view.iterators]

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using const_iterator = implementation-defined;
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#
A type that meets the requirements of a constant Cpp17RandomAccessIterator ([random.access.iterators]), models contiguous_­iterator ([iterator.concept.contiguous]), and meets the constexpr iterator requirements ([iterator.requirements.general]), whose value_­type is the template parameter charT.
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All requirements on container iterators ([container.requirements]) apply to basic_­string_­view​::​const_­iterator as well.
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constexpr const_iterator begin() const noexcept; constexpr const_iterator cbegin() const noexcept;
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Returns: An iterator such that
  • (3.1)
    if !empty(), addressof(*begin()) == data_­,
  • (3.2)
    otherwise, an unspecified value such that [begin(), end()) is a valid range.
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constexpr const_iterator end() const noexcept; constexpr const_iterator cend() const noexcept;
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Returns: begin() + size().
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constexpr const_reverse_iterator rbegin() const noexcept; constexpr const_reverse_iterator crbegin() const noexcept;
5
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Returns: const_­reverse_­iterator(end()).
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constexpr const_reverse_iterator rend() const noexcept; constexpr const_reverse_iterator crend() const noexcept;
6
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Returns: const_­reverse_­iterator(begin()).