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

    From cppreference.com
     
    C++
     
    Containers library
     
    std::span
     
    constexpr bool empty() const noexcept;
    		 (since C++20)
    See More

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

    Return value

    true if the span is empty; 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) [edit]