std::span::size(3) C++ Standard Libary std::span::size(3) NAME std::span::size - std::span::size Synopsis constexpr size_type size() const noexcept; (since C++20) Returns the number of elements in the span. Parameters (none) Return value The number of elements in the span. Note Feature-test macro Value Std Feature __cpp_lib_ssize 201902L (C++20) std::ssize and unsigned std::span::size Example // Run this code #include <iostream> #include <span> void show_sizes(std::span<const int> span) { std::cout << span .size() << ' ' // 8 << span.first(7) .size() << ' ' // 7 << span.first<6>() .size() << ' ' // 6 << span.last(5) .size() << ' ' // 5 << span.last<4>() .size() << ' ' // 4 << span.subspan(2, 3) .size() << ' ' // 3 << span.subspan<3, 2>() .size() << ' ' // 2 << '\n'; } int main() { int antique_array[]{1, 2, 3, 4, 5, 6, 7, 8}; show_sizes(antique_array); } Output: 8 7 6 5 4 3 2 See also constructor constructs a span (public member function) size_bytes returns the size of the sequence in bytes (public member function) http://cppreference.com 2024.06.10 std::span::size(3)
NAME | Synopsis | Parameters | Return value | Note | Example | Output: | See also
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