std::basic_ostream<CharT,Traits>::swap
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< cpp | io | basic ostream
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basic_ostream::swap (C++11) | ||||
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| protected: void swap( basic_ostream& rhs ); |
(since C++11) | |
Calls basic_ios::swap(rhs) to swap all data members of the base class, except for rdbuf(), between *this and rhs. This swap function is protected: it is called by the swap functions of the swappable output stream classes std::basic_ofstream and std::basic_ostringstream, which know how to correctly swap the associated streambuffers.
[edit] Parameters
| rhs | - | a basic_ostream of the same type to swap with |
[edit] Example
Run this code
#include <iostream> #include <sstream> #include <utility> int main() { std::ostringstream s1("hello"); std::ostringstream s2("bye"); s1.swap(s2); / OK, ostringstream has a public swap() std::swap(s1, s2); / OK, calls s1.swap(s2) / std::cout.swap(s2); / ERROR: swap is a protected member std::cout << s1.str() << '\n'; }
Output:
hello
