std::flat_multiset<Key,Compare,KeyContainer>::extract
From cppreference.com
container_type extract() &&; |
(since C++23) | |
Extracts adapted container c. Equivalent to return std::move(c);.
After this operation *this is empty, even if an exception is thrown.
Return value
std::move(c).
Complexity
Constant.
Example
Run this code
#include <cassert>
#include <flat_set>
#include <print>
#include <type_traits>
#include <utility>
#include <vector>
int main()
{
std::flat_multiset<int> set{1, 2, 3};
const auto size{set.size()};
auto c{std::move(set).extract()};
assert(c.size() == size);
assert(set.empty());
assert(set.keys().empty());
assert(set.values().empty());
// The default keys container is std::vector:
static_assert(std::is_same_v<decltype(c), std::vector<int>>);
std::println("{}", c);
}
Output:
[1, 2, 3]
See also
| replaces the underlying container (public member function) |