31 Input/output library [input.output]

31.10 File-based streams [file.streams]

31.10.3 Class template basic_filebuf [filebuf]

31.10.3.3 Assignment and swap [filebuf.assign]

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basic_filebuf& operator=(basic_filebuf&& rhs);
1
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Effects: Calls close() then move assigns from rhs.
After the move assignment *this has the observable state it would have had if it had been move constructed from rhs (see [filebuf.cons]).
2
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Returns: *this.
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void swap(basic_filebuf& rhs);
3
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Effects: Exchanges the state of *this and rhs.
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template<class charT, class traits> void swap(basic_filebuf<charT, traits>& x, basic_filebuf<charT, traits>& y);
4
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Effects: Equivalent to x.swap(y).