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std::tuple::swap

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< cpp‎ | utility‎ | tuple
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Defined in header <tuple>
void swap( tuple& other );
(since C++11)

Calls std::swap for each element in *this and its corresponding element in other.

Contents

[edit] Parameters

other - tuple of values to swap

[edit] Return value

(none)

[edit] Exceptions

noexcept specification:  
noexcept(

    noexcept(swap(std::declval<T0&>>(), std::declval<T0&>())) &&
    noexcept(swap(std::declval<T1&>>(), std::declval<T1&>())) &&
    noexcept(swap(std::declval<T2&>>(), std::declval<T2&>())) &&
    ...

)

[edit] Example

#include <iostream>
#include <tuple>
#include <string>
 
int main()
{
    std::tuple<int, std::string, float> p1, p2;
    p1 = std::make_tuple(10, "test", 3.14);
    p2.swap(p1);
    std::cout << "("  << std::get<0>(p2)
              << ", " << std::get<1>(p2)
              << ", " << std::get<2>(p2) << ")\n";
}

Output:

(10, test, 3.14)

[edit] See also