std::basic_filebuf<CharT,Traits>::operator=
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< cpp | io | basic filebuf
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std::basic_filebuf
Public member functions
basic_filebuf::operator=
(C++11)
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(C++26)
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Non-member functions
(C++11)
std::basic_filebuf & operator=( std::basic_filebuf && rhs );
(1)
(since C++11)
std::basic_filebuf & operator=( const std::basic_filebuf & rhs ) = delete;
(2)
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.
Contents
[edit] Parameters
rhs
-
another
basic_filebuf that will be moved from
[edit] Return value
*this
[edit] Example
Run this code
#include <cassert> #include <fstream> #include <iostream> #include <string> int main() { std::ofstream {"test.in"} << "test\n"; // writes via a temporary object std::ifstream fin("test.in"); // read-only stream std::ofstream fout("test.out"); // write-only stream std::string s; std::getline (fin, s); std::cout << "s = [" << s << "]\n"; // s contains "test" assert (fout.is_open()); *fin.rdbuf() = std::move(*fout.rdbuf()); assert (!fout.is_open()); std::getline (fin, s); std::cout << "s = [" << s << "]\n"; // s is empty input }
Output:
s = [test] s = []