| I/O manipulators | ||||
| Print functions(C++23) | ||||
| C-style I/O | ||||
| Buffers | ||||
(C++23) | ||||
(C++98/26*) | ||||
(C++20) | ||||
| Streams | ||||
| Abstractions | ||||
| File I/O | ||||
| String I/O | ||||
| Array I/O | ||||
(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
(C++98/26*) | ||||
(C++98/26*) | ||||
(C++98/26*) | ||||
| Synchronized Output | ||||
(C++20) | ||||
| Types | ||||
| Error category interface | ||||
(C++11) | ||||
(C++11) |
| Global objects | ||||
| Member functions | ||||
(C++11) | ||||
| Formatted input | ||||
| Unformatted input | ||||
| Positioning | ||||
| Miscellaneous | ||||
basic_istream::swap (C++11) | ||||
| Member classes | ||||
| Non-member functions | ||||
protected: void swap( basic_istream& rhs); | (since C++11) | |
Callsbasic_ios::swap(rhs) to swap all data members of the base class except forrdbuf(), and swaps the values of thegcount() counters between*this andrhs. This swap function is protected: it is called by the swap functions of the swappable input stream classesstd::basic_ifstream andstd::basic_istringstream, which know how to correctly swap the associated streambuffers.
| rhs | - | differentbasic_istream object of the same type to swap with |
#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
