21 Containers library [containers]

21.3 Sequence containers [sequences]

21.3.7 Class template array [array]

21.3.7.6 Tuple interface [array.tuple]

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template<class T, size_t N> struct tuple_size<array<T, N>> : integral_constant<size_t, N> { };
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tuple_element<I, array<T, N>>::type
1
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Requires: I < N.
The program is ill-formed if I is out of bounds.
2
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Value: The type T.
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template<size_t I, class T, size_t N> constexpr T& get(array<T, N>& a) noexcept; template<size_t I, class T, size_t N> constexpr T&& get(array<T, N>&& a) noexcept; template<size_t I, class T, size_t N> constexpr const T& get(const array<T, N>& a) noexcept; template<size_t I, class T, size_t N> constexpr const T&& get(const array<T, N>&& a) noexcept;
3
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Requires: I < N.
The program is ill-formed if I is out of bounds.
4
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Returns: A reference to the I element of a, where indexing is zero-based.