std::span<T,Extent>::size_bytes
From cppreference.com
constexpr size_type size_bytes() const noexcept;
|
(since C++20) | |
Returns the size of the sequence in bytes.
Return value
size() * sizeof(element_type).
Example
Run this code
#include <cstdint>
#include <iostream>
#include <span>
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
);
int main()
{
// typically, a static span holds only a pointer:
std::cout << sizeof(s) << '\n';
}
Possible output:
8