29 template <typename ElementType> class Span : public SpanBase {
48   Span() : Data(nullptr), Size(0) {}  in Span()  function
52   Span(std::nullptr_t) : Data(nullptr), Size(0) {}  in Span()  function
55   Span(pointer Ptr, index_type Count) : Data(Ptr), Size(Count) {  in Span()  function
62   Span(pointer FirstElem, pointer LastElem)  in Span()  function
70   template <typename T, size_t N> Span(T (&Arr)[N]) : Data(Arr), Size(N) {}  in Span()  function
75   Span(const std::array<typename std::remove_const<element_type>::type, N> &Arr)  in Span()  function
85   Span(Container &Cont,
102   Span(Container &&Cont,
112   Span(const Span &) noexcept = default;
113   Span(Span &&) noexcept;
119   Span(const Span<OtherElementType> &Other)  in Span()  function
126   Span(Span<OtherElementType> &&Other) : Data(Other.Data), Size(Other.Size) {}  in Span()  function
128   ~Span() = default;
130   Span &operator=(const Span &) noexcept = default;
131   Span &operator=(Span &&) noexcept;
139   Span<element_type> first(index_type Count) const {  in first()
143     return Span<element_type>(data(), Count);  in first()
147   Span<element_type> last(index_type Count) const {  in last()
151     return Span<element_type>(Count == 0 ? data() : data() + (size() - Count),  in last()
159   Span<element_type> subspan(index_type Offset,
166     return Span<element_type>(
208   template <typename OtherElementType> friend class Span;
215 Span<ElementType>::Span(Span &&) noexcept = default;
217 Span<ElementType> &Span<ElementType>::operator=(Span &&) noexcept = default;