void swap( std::basic_filebuf& rhs ); | (since C++11) |
Swaps the state and the contents of *this and rhs.
Parameters
| rhs | - | another basic_filebuf |
Return value
(none).
Notes
This function is called automatically when swapping std::fstream objects, it is rarely necessary to call it directly.
Example
#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'; // outputs the first line of test.in
fin.rdbuf()->swap(*fout.rdbuf()); //swap the underlying buffers
getline(fin, s); // fails: cannot read from a write-only filebuf
std::cout << s << '\n'; // prints empty line
}See also
| operator=
(C++11) | assigns a basic_filebuf object (public member function) |
| (C++11) | specializes the std::swap algorithm (function template) |
| (C++11) | swaps two file streams (public member function of std::basic_fstream) |
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