FreeBSD Manual Pages
std::span::front(3) C++ Standard Libary std::span::front(3) NAME std::span::front - std::span::front Synopsis constexpr reference front() const; Returns a reference to the first element in the span. Calling front on an empty span results in undefined behavior. Parameters (none) Return value A reference to the first element. Complexity Constant Notes For a span c, the expression c.front() is equivalent to *c.begin(). Example // Run this code #include <span> #include <iostream> void print(std::span<const int> const data) { for (auto offset{0U}; offset != data.size(); ++offset) { std::cout << data.subspan(offset).front() << ' '; } std::cout << '\n'; } int main() { constexpr int data[] { 0, 1, 2, 3, 4, 5, 6 }; print({data, 4}); } Output: 0 1 2 3 See also back access the last element (C++20) (public member function) http://cppreference.com 2022.07.31 std::span::front(3)
NAME | Synopsis | Parameters | Return value | Complexity | Notes | Example | Output: | See also
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=std::span::front&sektion=3&manpath=FreeBSD+Ports+15.0>