std::swap(std::array)

 

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std::array

Member types
Member functions
Element access array::at array::operator[]    array::front array::back array::data Operations array::fill array::swap	Iterators array::beginarray::cbegin array::endarray::cend array::rbeginarray::crbegin    array::rendarray::crend	Capacity array::empty array::size array::max_size
Non-member functions
operator==operator<=> (C++20) get(std::array) swap(std::array) to_array (C++20)	operator|=operator<operator>operator<=operator>= (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)
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Defined in header <array>
template<class T, std::size_t N > void swap(std::array<T, N>& lhs,            std::array<T, N>& rhs );		(since C++11) (until C++17)
template<class T, std::size_t N > void swap(std::array<T, N>& lhs,            std::array<T, N>& rhs )                noexcept(/* see below */);		(since C++17) (constexpr since C++20)

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

This overload participates in overload resolution only if N ==0 or std::is_swappable_v<T> is true.

(since C++17)

Parameters

lhs, rhs

-

containers whose contents to swap

Return value

(none)

Complexity

Linear in size of the containers.

Exceptions

noexcept specification:   noexcept(noexcept(lhs.swap(rhs)))

(since C++17)

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 =[](constint& n){std::cout<<' '<< n;};   // Print state before swapstd::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 swapstd::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

See also

swap	swaps the contents (public member function)