27 Input/output library [input.output]

27.7 Formatting and manipulators [iostream.format]

27.7.2 Input streams [input.streams]

27.7.2.5 Class template basic_iostream [iostreamclass]

27.7.2.5.3 basic_iostream assign and swap [iostream.assign]

basic_iostream& operator=(basic_iostream&& rhs);

Effects: swap(rhs).

void swap(basic_iostream& rhs);

Effects: Calls basic_istream<charT, traits>::swap(rhs).