protected member function
<ostream> <iostream>

std::ostream::swap

void swap (ostream& x);
Swap internals
Exchanges all internal members between x and *this, except the pointers to the associated stream buffers: rdbuf shall return the same in both objects as before the call.

Internally, the function calls ios::swap.

Derived classes can call this function to implement custom swap functions.

Parameters

x
Another ostream object.

Return Value

none

Data races

Modifies both stream objects (*this and x).

Exception safety

No-throw guarantee: this member function never throws exceptions.

See also

ostream::operator=
Move assignment (protected member function )
ios::swap
Swap internals (protected member function )

C++

<ostream>