(C++17) | ||||
| Sequence | ||||
(C++11) | ||||
(C++26) | ||||
(C++26) | ||||
(C++11) | ||||
| Associative | ||||
| Unordered associative | ||||
(C++11) | ||||
(C++11) | ||||
(C++11) | ||||
(C++11) | ||||
| Adaptors | ||||
(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
| Views | ||||
(C++20) | ||||
(C++23) | ||||
| Tables | ||||
| Iterator invalidation | ||||
| Member function table | ||||
| Non-member function table |
| Member functions | ||||
| Element access | ||||
(C++26) | ||||
| Iterators | ||||
(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
| Observers | ||||
span::size_bytes | ||||
| Subviews | ||||
| Non-member functions | ||||
| Non-member constant | ||||
| Deduction guides |
constexpr size_type size_bytes()constnoexcept; | (since C++20) | |
Returns the size of the sequence in bytes.
size()* sizeof(element_type).
#include <cstdint>#include <iostream>#include <span> constexprstaticstd::int32_t a[]{1,2,3,4,5};constexprstaticstd::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
(C++20) | returns the number of elements in the sequence (public member function)[edit] |
