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std::basic_istream<CharT,Traits>::swap

From cppreference.com
< cpp‎ | io‎ | basic istream
 
 
 
 
protected:
void swap( basic_istream& rhs );
(since C++11)

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.

[edit] Parameters

rhs - different basic_istream object of the same type to swap with

[edit] Example

Run this code
#include <iostream>
#include <sstream>
#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() << '\n';
}

Output:

hello
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