2.7 KiB
2.7 KiB
[span.elem]
23 Containers library [containers]
23.7 Views [views]
23.7.2 Contiguous access [views.contiguous]
23.7.2.2 Class template span [views.span]
23.7.2.2.6 Element access [span.elem]
constexpr reference operator[](size_type idx) const;
Hardened preconditions: idx < size() is true.
Returns: *(data() + idx).
Throws: Nothing.
constexpr reference at(size_type idx) const;
Returns: *(data() + idx).
Throws: out_of_range if idx >= size() is true.
constexpr reference front() const;
Hardened preconditions: empty() is false.
Returns: *data().
Throws: Nothing.
constexpr reference back() const;
Hardened preconditions: empty() is false.
Returns: *(data() + (size() - 1)).
Throws: Nothing.
constexpr pointer data() const noexcept;
Returns: data_.