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std::basic_istream::swap(3) C++ Standard Libary std::basic_istream::swap(3) NAME std::basic_istream::swap - std::basic_istream::swap Synopsis protected: (since C++11) void swap(basic_istream& rhs); 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::ba- sic_istringstream, which know how to correctly swap the associated streambuffers. Parameters rhs - different basic_istream object of the same type to swap with Example // Run this code #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(); } Output: hello http://cppreference.com 2022.07.31 std::basic_istream::swap(3)
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