Difference between revisions of "cpp/container/array/swap2"
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Latest revision as of 07:27, 30 September 2020
| Defined in header <array>
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template< class T, std::size_t N > void swap( std::array<T, N>& lhs, |
(since C++11) (until C++17) |
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| template< class T, std::size_t N > void swap( std::array<T, N>& lhs, |
(since C++17) (constexpr since C++20) |
|
|
This overload participates in overload resolution only if N == 0 or std::is_swappable_v<T> is true. |
(since C++17) |
Contents |
[edit] Parameters
| lhs, rhs | - | containers whose contents to swap |
[edit] Return value
(none)
[edit] Complexity
Linear in size of the containers.
Exceptions
|
noexcept specification:
noexcept(noexcept(lhs.swap(rhs))) |
(since C++17) |
[edit] Example
Run this code
#include <algorithm> #include <iostream> #include <array> int main() { std::array<int, 3> alice{1, 2, 3}; std::array<int, 3> bob{7, 8, 9}; 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 -- SWAP Alice: 7 8 9 Bobby: 1 2 3
[edit] See also
| swaps the contents (public member function) |
