21 Containers library [containers]

21.7 Views [views]

21.7.3 Class template span [views.span]

21.7.3.6 Iterator support [span.iterators]

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constexpr iterator begin() const noexcept;
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Returns: An iterator referring to the first element in the span.
If empty() is true, then it returns the same value as end().
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constexpr iterator end() const noexcept;
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Returns: An iterator which is the past-the-end value.
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constexpr reverse_iterator rbegin() const noexcept;
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Effects: Equivalent to: return reverse_­iterator(end());
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constexpr reverse_iterator rend() const noexcept;
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Returns: Equivalent to: return reverse_­iterator(begin());
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constexpr const_iterator cbegin() const noexcept;
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Returns: A constant iterator referring to the first element in the span.
If empty() is true, then it returns the same value as cend().
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constexpr const_iterator cend() const noexcept;
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Returns: A constant iterator which is the past-the-end value.
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constexpr const_reverse_iterator crbegin() const noexcept;
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Effects: Equivalent to: return const_­reverse_­iterator(cend());
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constexpr const_reverse_iterator crend() const noexcept;
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Effects: Equivalent to: return const_­reverse_­iterator(cbegin());