std::span<T,Extent>::empty
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std::span
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span::empty
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
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" ""