cpp/io/basic istream/operator=

1) The copy assignment operator is protected, and is deleted. Input streams are not CopyAssignable.

2) The move assignment operator exchanges the gcount values and all data members of the base class, except for, with , as if by calling . This move assignment operator is protected: it is only called by the move assignment operators of the derived movable input stream classes std and std, which know how to correctly move-assign the associated streambuffers.

Example
cpp/io/basic istream/operator= cpp/io/basic istream/operator= cpp/io/basic istream/operator= cpp/io/basic istream/operator= cpp/io/basic istream/operator= cpp/io/basic istream/operator= cpp/io/basic istream/operator= cpp/io/basic istream/operator=