# std::ios_base::operator=

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< cpp‎ | io‎ | ios base

private: ios_base& operator=( const ios_base& ); |  | (until C++11)
public: ios_base& operator=( const ios_base& ) = delete; |  | (since C++11)

The copy assignment operator is private(until C++11)deleted(since C++11): streams are not copy-assignable.

### Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR | Applied to | Behavior as published | Correct behavior
--- | --- | --- | ---
LWG 50 | C++98 | the copy assignment operator was not specified | specified as private

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