std::span<T,Extent>::empty - cppreference.com (original) (raw)

| constexpr bool empty() const noexcept; | | (since C++20) | | -------------------------------------- | | ------------- |

Checks if the span is empty. Equivalent to return size() == 0;.

[edit] Return value

true if the span is empty; false otherwise.

[edit] Example

#include #include #include   int main() { std::span 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" ""

[edit] See also

| | returns the number of elements in the sequence (public member function) [edit] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |