Section: 31.10.4 [ifstream] Status: C++11 Submitter: Niels Dekker Opened: 2008-09-20 Last modified: 2023-02-07 02:58:54 UTC
Priority: Not Prioritized
View all issues with C++11 status.
It appears that we have an issue similar to issue 675 regarding the move-assignment of stream types. For example, when assigning to an std::ifstream, ifstream1, it seems preferable to close the file originally held by ifstream1:
ifstream1 = std::move(ifstream2);
The current Draft (N2723) specifies that the move-assignment of stream types like ifstream has the same effect as a swap:
Assign and swap [ifstream.assign]basic_ifstream& operator=(basic_ifstream&& rhs);
[ Batavia (2009-05): ]
Howard agrees with the analysis and the direction proposed.
Move to Open pending specific wording to be supplied by Howard.
[ 2009-07 Frankfurt: ]
Howard is going to write wording.
[ 2009-07-26 Howard provided wording. ]
[ 2009-09-13 Niels adds: ]
Note: The proposed change of 184.108.40.206 [filebuf.assign] p1 depends on the resolution of LWG 1204, which allows implementations to assume that *this and rhs refer to different objects.
[ 2009 Santa Cruz: ]
Leave as Open. Too closely related to 911 to move on at this time.
[ 2010 Pittsburgh: ]
Moved to Ready for Pittsburgh.
Change 220.127.116.11 [stringbuf.assign]/1:
basic_stringbuf& operator=(basic_stringbuf&& rhs);
basic_istringstream& operator=(basic_istringstream&& rhs);
basic_ostringstream& operator=(basic_ostringstream&& rhs);
basic_stringstream& operator=(basic_stringstream&& rhs);
Change 18.104.22.168 [filebuf.assign]/1:
basic_filebuf& operator=(basic_filebuf&& rhs);
basic_ifstream& operator=(basic_ifstream&& rhs);
basic_ofstream& operator=(basic_ofstream&& rhs);
basic_fstream& operator=(basic_fstream&& rhs);