std::pair::swap

 

C++

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正则表达式库 （C++11）

原子操作库 （C++11）

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实用工具库

类型的支持 (basic types, RTTI, type traits)

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可变参数函数

日期和时间

函数对象

initializer_list （C++11）

bitset

hash （C++11）

关系运算符 Original: Relational operators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

双和元组 Original: Pairs and tuples The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

pair

tuple （C++11）

piecewise_construct_t （C++11）

piecewise_construct （C++11）

掉期，远期和移动 Original: Swap, forward and move The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

swap

forward （C++11）

move （C++11）

move_if_noexcept （C++11）

declval （C++11）

 

std::pair

成员函数 Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

pair::pair

pair::operator=

pair::swap

非成员函数 Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

make_pair

operator= operator!= operator< operator<= operator> operator>=

std::swap

get （C++11）

Helper类 Original: Helper classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

tuple_size （C++11）

tuple_element （C++11）

 

void swap(pair& other);		（C++11 起）

交换first与other.first和secondother.second.

Original:

Swaps first with other.first and second with other.second.

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参数

other

-

对值进行交换 Original: pair of values to swap The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

返回值

（无）

Original:

(none)

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例外

noexcept specification:  （C++11 起）

noexcept(      noexcept(std::swap(first, p.first)) &&      noexcept(std::swap(second, p.second)) )

为例

#include <iostream>
#include <utility>
#include <string>
int main()
{
    std::pair<int, std::string> p1, p2;
    p1 = std::make_pair(10, "test");
    p2.swap(p1);
    std::cout << "(" << p2.first << ", " << p2.second << ")\n";
}

Output:

(10, test)