std::basic_filebuf::operator= - cppreference.com

##### cppreference.com

##### Search

Create account

##### Namespaces

- Page
- Discussion

##### Variants

##### Views

- View
- Edit
- History

##### Actions

# std::basic_filebuf::operator=

From cppreference.com
< cpp‎ | io‎ | basic filebuf

std::basic_filebuf& operator=( std::basic_filebuf&& rhs ); |  | (since C++11)
std::basic_filebuf& operator=( const std::basic_filebuf& rhs ) = delete; |  |

Assigns another `basic_filebuf` object.

1) First calls close() to close the associated file, then moves the contents of `rhs` into `*this`: the put and get buffers, the associated file, the locale, the openmode, the is_open flag, and any other state. After the move, `rhs` is not associated with a file and rhs.is_open() == false.
2) The copy assignment operator is deleted; `basic_filebuf` is not `CopyAssignable`.

### [edit] Parameters

rhs | - | another `basic_filebuf` that will be moved from

### [edit] Return value

`*this`

### [edit] Example

Run this code

    #include <fstream>
    #include <string>
    #include <iostream>

    int main()
    {

        std::ifstream fin("test.in"); // read-only
        std::ofstream fout("test.out"); // write-only

        std::string s;
        getline(fin, s);
        std::cout << s << '\n'; // output

        *fin.rdbuf() = std::move(*fout.rdbuf());

        getline(fin, s);
        std::cout << s << '\n'; // empty line

        std::cout << std::boolalpha << fout.is_open() << '\n'; // prints "false"

    }

### [edit] See also

(constructor) | constructs a basic_filebuf object (public member function) [edit]
swap (C++11) | swaps two basic_filebuf objects (public member function) [edit]

Retrieved from "http://en.cppreference.com/mwiki/index.php?title=cpp/io/basic_filebuf/operator%3D&oldid=64257"