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

From cppreference.com
< cpp‎ | container‎ | span
 
 
 
 
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"
""

[edit] See also

(C++20)
returns the number of elements in the sequence
(public member function) [edit]
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