std::as_bytes,std::as_writable_bytes (3) Linux Manual Page

std::as_bytes,std::as_writable_bytes – std::as_bytes,std::as_writable_bytes

Synopsis

template <class T, std::size_t N>
(1)

    std::span<const std::byte, S /* see below */> as_bytes(std::span<T, N> s) noexcept;

template <class T, std::size_t N>
(2)

    std::span<std::byte, S /* see below */> as_writable_bytes(std::span<T, N> s) noexcept;

Obtains a view to the object representation of the elements of the span s.
If N is std::dynamic_extent, the extent of the returned span S is also std::dynamic_extent; otherwise it is sizeof(T) * N.
as_writable_bytes only participates in overload resolution if std::is_const_v<T> is false.

Return value

1) A span constructed with {reinterpret_cast<const std::byte*>(s.data()), s.size_bytes()}.
2) A span constructed with {reinterpret_cast<std::byte*>(s.data()), s.size_bytes()}.