std:: swap (std::inplace_vector)
From cppreference.com
<
cpp
|
container
|
inplace vector
Defined in header
<inplace_vector>
|
||
constexpr
friend
void
swap
(
std::
inplace_vector
&
lhs,
std:: inplace_vector & rhs ) noexcept ( /* see below */ ) ; |
(since C++26) | |
Specializes the std::swap algorithm for std::inplace_vector . Swaps the contents of lhs and rhs . Calls lhs. swap ( rhs ) .
Parameters
lhs, rhs | - | containers whose contents to swap |
Return value
(none)
Complexity
Linear in size of the containers.
Exceptions
noexcept
specification:
noexcept
(
N
==
0
||
( std:: is_nothrow_swappable_v < T > && std:: is_nothrow_move_constructible_v < T > ) )
( std:: is_nothrow_swappable_v < T > && std:: is_nothrow_move_constructible_v < T > ) )
Example
Run this code
#include <algorithm> #include <iostream> #include <inplace_vector> int main() { std::inplace_vector<int, 4> alice{1, 2, 3}; std::inplace_vector<int, 4> 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 << "\nBobby:"; 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 << "\nBobby:"; std::for_each(bob.begin(), bob.end(), print); std::cout << '\n'; }
Output:
Alice: 1 2 3 Bobby: 7 8 9 10 -- SWAP Alice: 7 8 9 10 Bobby: 1 2 3
See also
swaps the contents
(public member function) |