std::basic_istream::swap

来自cppreference.com
< cpp‎ | io‎ | basic istream

protected:
void swap(basic_istream& rhs);
(C++11 起)
调用basic_ios::swap(rhs)交换基类的所有数据成员除了rdbuf(),掉期之间gcount()*thisrhs计数器的值。该交换功能的保护:它是所谓的交换功能的的交换输入流类std::basic_ifstreamstd::basic_istringstream,哪知道如何正确地交换相关的streambuffers,.
原文:
Calls basic_ios::swap(rhs) to swap all data members of the base class except for rdbuf(), and swaps the values of the gcount() counters between *this and rhs. This swap function is protected: it is called by the swap functions of the swappable input stream classes std::basic_ifstream and std::basic_istringstream, which know how to correctly swap the associated streambuffers.
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[编辑] 参数

rhs -
交换不同basic_istream相同类型的对象
原文:
different basic_istream object of the same type to swap with
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你可以帮忙校正和验证翻译。点击此处查看指示。

[编辑] 示例

#include <sstream>
#include <iostream>
#include <utility>
int main()
{
    std::istringstream s1("hello");
    std::istringstream s2("bye");
 
    s1.swap(s2); // OK, istringstream has a public swap()
    std::swap(s1, s2); // OK, calls s1.swap(s2)
//  std::cin.swap(s2); // ERROR: swap is a protected member
 
    std::cout << s1.rdbuf();
}

输出:

hello