constexpr const E* begin() const noexcept;
Returns: A pointer to the beginning of the array
. If
size() == 0 the
values of
begin() and
end() are unspecified but they shall be
identical
.constexpr const E* end() const noexcept;
Returns: begin() + size(). constexpr size_t size() const noexcept;
Returns: The number of elements in the array
. Complexity: Constant time
.