void swap( array& other ) noexcept(/* see below */);
(since C++11)Exchanges the contents of the container with those of other. Does not cause iterators and references to associate with the other container.
[edit] Parameters other - container to exchange the contents with [edit] Return value(none)
[edit] ExceptionsFor zero-sized arrays,
[edit] ComplexityLinear in size of the container.
[edit] Example#include <array>
#include <iostream>
template<class Os, class V> Os& operator<<(Os& os, const V& v)
{
os << '{';
for (auto i : v)
os << ' ' << i;
return os << " } ";
}
int main()
{
std::array<int, 3> a1{1, 2, 3}, a2{4, 5, 6};
auto it1 = a1.begin();
auto it2 = a2.begin();
int& ref1 = a1[1];
int& ref2 = a2[1];
std::cout << a1 << a2 << *it1 << ' ' << *it2 << ' ' << ref1 << ' ' << ref2 << '\n';
a1.swap(a2);
std::cout << a1 << a2 << *it1 << ' ' << *it2 << ' ' << ref1 << ' ' << ref2 << '\n';
// Note that after swap iterators and references stay associated with their original
// array, e.g. `it1` still points to element a1[0], `ref1` still refers to a1[1].
}
Output:
{ 1 2 3 } { 4 5 6 } 1 4 2 5
{ 4 5 6 } { 1 2 3 } 4 1 5 2[edit] Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
DR Applied to Behavior as published Correct behavior LWG 2456 C++11 thenoexcept specification is ill-formed made to work [edit] See also
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