std::basic_filebuf<CharT,Traits>::operator=
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< cpp | io | basic filebuf
std::basic_filebuf& operator=(std::basic_filebuf&& rhs ); | (1) | (since C++11) |
std::basic_filebuf& operator=(conststd::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 objectstd::ifstream fin("test.in");// read-only streamstd::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 = []
[edit]See also
constructs a basic_filebuf object (public member function) | |
(C++11) | swaps two basic_filebuf objects (public member function) |
