22 Containers library [containers]

22.7 Views [views]

22.7.3 Class template span [views.span]

22.7.3.6 Element access [span.elem]

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constexpr reference operator[](size_type idx) const;
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Preconditions: idx < size() is true.
2
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Effects: Equivalent to: return *(data() + idx);
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constexpr reference front() const;
3
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Preconditions: empty() is false.
4
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Effects: Equivalent to: return *data();
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constexpr reference back() const;
5
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Preconditions: empty() is false.
6
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Effects: Equivalent to: return *(data() + (size() - 1));
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constexpr pointer data() const noexcept;
7
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Effects: Equivalent to: return data_­;