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std::span::front(3) C++ Standard Libary std::span::front(3) NAME std::span::front - std::span::front Synopsis constexpr reference front() const; (since C++20) 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 <iostream> #include <span> 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 (public member function) http://cppreference.com 2024.06.10 std::span::front(3)
NAME | Synopsis | Parameters | Return value | Complexity | Notes | Example | Output: | See also
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