std::span<T,Extent>::empty
From cppreference.com
| constexpr bool empty() const noexcept; |
(since C++20) | |
Checks if the span is empty.
Parameters
(none)
Return value
true if the span is empty (i.e., size() == 0); false otherwise.
Example
Run this code
#include <iomanip> #include <iostream> #include <span> int main() { std::span<const char> span{"ABCDEF"}; while (!span.empty()) { std::cout << std::quoted(span.data()) << '\n'; span = span.last(span.size() - 1); } }
Output:
"ABCDEF" "BCDEF" "CDEF" "DEF" "EF" "F" ""
See also
| (C++20) |
returns the number of elements in the sequence (public member function) |