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std::swap(std::flat_set)

From cppreference.com
< cpp‎ | container‎ | flat set
 
 
 
 
Defined in header <flat_set>
friend void swap( std::flat_set& lhs, std::flat_set& rhs ) noexcept;
(since C++23)

Specializes the std::swap algorithm for std::flat_set. Swaps the contents of lhs and rhs. Calls lhs.swap(rhs).

Contents

[edit] Parameters

lhs, rhs - containers whose contents to swap

[edit] Return value

(none)

[edit] Complexity

Same as swapping the underlying container.

[edit] Example

#include <algorithm>
#include <iostream>
#include <flat_set>
 
int main()
{
    std::flat_set<int> alice{1, 2, 3};
    std::flat_set<int> bob{7, 8, 9, 10};
 
    auto print = [](const int& n) { std::cout << ' ' << n; };
 
    // Print state before swap
    std::cout << "Alice:";
    std::for_each(alice.begin(), alice.end(), print);
    std::cout << "\n" "Bob  :";
    std::for_each(bob.begin(), bob.end(), print);
    std::cout << '\n';
 
    std::cout << "-- SWAP\n";
    std::swap(alice, bob);
 
    // Print state after swap
    std::cout << "Alice:";
    std::for_each(alice.begin(), alice.end(), print);
    std::cout << "\n" "Bob  :";
    std::for_each(bob.begin(), bob.end(), print);
    std::cout << '\n';
}

Output:

Alice: 1 2 3
Bob  : 7 8 9 10
-- SWAP
Alice: 7 8 9 10
Bob  : 1 2 3

[edit] See also

swaps the contents
(public member function) [edit]