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642020ab7e5ba659a626a0808347e0488ae69394
gcc/libstdc++-v3/include/bits
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Ivan Lazaric 642020ab7e libstdc++: implement formatter for std::filesystem::path 
This patch implements formatting for std::filesystem::path from P2845R8,
and defines the feature test macro __cpp_lib_format_path to 202403L,
provided only in <filesystem>.

Formatting options are performed (if applicable) in order:
'g', '?', transcoding, fill-and-align & width

The standard specifies transcoding behaviour only when literal encoding
is UTF-8, leaving all other cases implementation defined.
Current implementation of filesystem::path assumes:
* char encoding is UTF-8
* wchar_t encoding is either UTF-32 or UTF-16

libstdc++-v3/ChangeLog:

	* include/bits/fs_path.h: Include bits/formatfwd.h.
	(std::formatter<filesystem::path, _CharT>): Define.
	* include/bits/version.def (format_path): Define.
	* include/bits/version.h: Regenerate.
	* include/std/filesystem: Expose __cpp_lib_format_path.
	* testsuite/std/format/fs_path.cc: New test.

Reviewed-by: Tomasz Kamiński <tkaminsk@redhat.com>
Signed-off-by: Ivan Lazaric <ivan.lazaric1@gmail.com>
Co-authored-by: Jonathan Wakely <jwakely@redhat.com>
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algorithmfwd.h
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align.h
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atomic_base.h
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atomic_futex.h
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atomic_timed_wait.h
libstdc++: Fix proxy wait detection in atomic wait
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atomic_wait.h
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binders.h
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erase_if.h
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fs_path.h
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regex.h
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regex.tcc
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requires_hosted.h
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sat_arith.h
libstdc++: Extend __is_standard_integer to cover extended integer types
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semaphore_base.h
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stl_multimap.h
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version.def
libstdc++: implement formatter for std::filesystem::path
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version.h
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version.tpl
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