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

Since C++20

Checks if the span is empty.

# Declarations

constexpr bool empty() const noexcept;

(since C++20)

# Return value

true if the span is empty (i.e., size() == 0); false otherwise.

# Example

#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);
    }
}

# See also

size