std::span<T,Extent>::size_bytes
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std::span
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span::size_bytes
constexpr size_type size_bytes() const noexcept;
(since C++20)
Returns the size of the sequence in bytes.
[edit] Return value
size() * sizeof(element_type).
[edit] 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