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Jonathan Wakely 1dfd95f0a0 libstdc++: Fix filesystem::rename on Windows [PR 98985]
The _wrename function won't overwrite an existing file, so use
MoveFileEx instead. That allows renaming directories over files, which
POSIX doesn't allow, so check for that case explicitly and report an
error.

Also document the deviation from the expected behaviour, and add a test
for filesystem::rename which was previously missing.

The Filesystem TS experimental::filesystem::rename doesn't have that
extra code to handle directories correctly, so the relevant parts of the
new test are not run on Windows.

libstdc++-v3/ChangeLog:

	* doc/xml/manual/status_cxx2014.xml: Document implementation
	specific properties of std::experimental::filesystem::rename.
	* doc/xml/manual/status_cxx2017.xml: Document implementation
	specific properties of std::filesystem::rename.
	* doc/html/*: Regenerate.
	* src/c++17/fs_ops.cc (fs::rename): Implement correct behaviour
	for directories on Windows.
	* src/filesystem/ops-common.h (__gnu_posix::rename): Use
	MoveFileExW on Windows.
	* testsuite/27_io/filesystem/operations/rename.cc: New test.
	* testsuite/experimental/filesystem/operations/rename.cc: New test.
2021-02-12 15:29:50 +00:00
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libstdc++-v3 libstdc++: Fix filesystem::rename on Windows [PR 98985] 2021-02-12 15:29:50 +00:00
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.gitignore Sync .gitignore with binutils-gdb 2020-12-02 11:04:01 -07:00
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ChangeLog Daily bump. 2021-01-26 00:16:34 +00:00
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ltmain.sh Do not use HAVE_DOS_BASED_FILE_SYSTEM for Cygwin. 2020-04-17 09:22:51 +02:00
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