table of contents
std::span::empty(3) | C++ Standard Libary | std::span::empty(3) |
NAME¶
std::span::empty - std::span::empty
Synopsis¶
[[nodiscard]] constexpr bool empty() const noexcept;
Checks if the span is empty.
Parameters¶
(none)
Return value¶
true if the span is empty (i.e., size() == 0); false otherwise.
Example¶
// Run this code
#include <span>
#include <iostream>
#include <iomanip>
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¶
size returns the number of elements in the sequence
(public member function)
2022.07.31 | http://cppreference.com |