std::span<T,Extent>::size_bytes

constexpr size_type size_bytes() const noexcept;

(since C++20)

Returns the size of the sequence in bytes.

Parameters

(none)

Return value

The size of the sequence in bytes, i.e., size() * sizeof(element_type).

Example

#include <cstdint>
#include <span>
 
int main()
{
    constexpr static std::int32_t a[]{1, 2, 3, 4, 5};
    constexpr static std::span s{a};
 
    static_assert
    (
        sizeof(int32_t) == 4 &&
        std::size(a) == 5 &&
        sizeof a == 20 &&
        s.size() == 5 &&
        s.size_bytes() == 20
    );
}

See also

(C++20)

returns the number of elements in the sequence
(public member function)

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