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std::tuple::swap

提供: cppreference.com
< cpp‎ | utility‎ | tuple

Defined in header <tuple>
void swap( tuple& other );
(C++11およびそれ以降)
std::swap*this内の対応する要素の各要素に対してother呼び出し.
Original:
Calls std::swap for each element in *this and its corresponding element in other.
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目次

[編集] パラメータ

other -
交換する値のタプル
Original:
tuple of values to swap
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[編集] 値を返します

(なし)
Original:
(none)
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[編集] 例外

noexcept specification:  (C++11およびそれ以降)
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&>())) &&
    ...

)

[編集]

#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";
}

出力:

(10, test, 3.14)

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