# std::basic_iostream<CharT,Traits>::basic_iostream

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< cpp‎ | io‎ | basic iostream

explicit basic_iostream( std::basic_streambuf<CharT,Traits>* sb ); | (1) |
basic_iostream( const basic_iostream& other ) = delete; | (2) | (since C++11)
protected: basic_iostream( basic_iostream&& other ); | (3) | (since C++11)

Constructs new stream object.

1) Initializes with streambuf `sb`. The base classes are initialized as basic_istream<CharT,Traits>(sb) and basic_ostream<CharT,Traits>(sb). After the call rdbuf() == sb and gcount() == 0.
2) Copy construction is not allowed.
3) Move constructor: move-constructs the first base class `basic_istream` as basic_istream<CharT,Traits>(std::move(rhs));, which in turn move-constructs and initializes the virtual base std::basic_ios. The initialization of the other base, `basic_ostream`, is implementation-defined (e.g., a protected default constructor may be added to std::basic_ostream, which does nothing) because move-construction cannot use `rhs` twice. This move constructor is protected: it is called by the move constructors of the derived stream classes std::basic_fstream and std::basic_stringstream before they move-construct and associate the stream buffer.

### Parameters

sb | - | streambuf to initialize with
other | - | another stream to initialize with

### See also

operator= (C++11) | move-assigns another `basic_iostream` (protected member function)

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