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std::flat_set::extract(3)     C++ Standard Libary    std::flat_set::extract(3)

NAME
       std::flat_set::extract -	std::flat_set::extract

Synopsis
	  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.

Parameters
	  (none)

Return value
	  std::move(c).

Complexity
	  Constant.

Example
       // Run this code

	#include <cassert>
	#include <flat_set>
	#include <print>
	#include <type_traits>
	#include <vector>

	int main()
	{
	    std::flat_set<int> set{1, 2, 3};
	    const auto size = set.size();

	    auto c = 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
	  replace replaces the underlying container
		  (public member function)

http://cppreference.com		  2024.06.10	     std::flat_set::extract(3)

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