std::basic_filebuf<CharT,Traits>::swap
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< cpp | io | basic filebuf
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std::basic_filebuf
| Public member functions | ||||
(C++11) | ||||
basic_filebuf::swap (C++11) | ||||
(C++26) | ||||
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(C++11) |
| void swap( std::basic_filebuf& rhs ); |
(since C++11) | |
Swaps the state and the contents of *this and rhs.
Contents |
[edit] Parameters
| rhs | - | another basic_filebuf
|
[edit] Return value
(none)
[edit] Notes
This function is called automatically when swapping std::fstream objects, it is rarely necessary to call it directly.
[edit] Example
Run this code
#include <fstream> #include <iostream> #include <string> 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 }
[edit] See also
| (C++11) |
assigns a basic_filebuf object (public member function) [edit] |
| specializes the std::swap algorithm (function template) [edit] | |
| (C++11) |
swaps two file streams (public member function of std::basic_fstream<CharT,Traits>) [edit]
|
