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11 Commits

Author SHA1 Message Date
Jonathan Wakely b0874c667d LWG 2989 hide path iostream operators from normal lookup 
By only defining these operators as friends (with no namespace-scope
declaration) they can only be found by ADL and do not participate in
overload resolution for arguments of types other than path.

	LWG 2989 hide path iostream operators from normal lookup
	* include/bits/fs_path.h (operator<<, operator>>): Define inline as
	friends.
	* testsuite/27_io/filesystem/path/io/dr2989.cc: New.

From-SVN: r261711
 2018-06-18 19:59:44 +01:00
Jonathan Wakely 9534a5e62d PR libstdc++/78870 support std::filesystem on Windows 
PR libstdc++/78870 support std::filesystem on Windows
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* configure.ac: Check for link, readlink and symlink.
	* include/bits/fs_path.h (path::operator/=(const path&)): Move
	definition out of class body.
	(path::is_absolute(), path::_M_append(path)): Likewise.
	(operator<<(basic_ostream, const path&)): Use std::quoted directly.
	(operator>>(basic_istream, path&)): Likewise.
	(u8path): Reorder definitions and fix Windows implementation.
	(path::is_absolute()): Define inline and fix for Windows.
	[!_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::operator/=(const path&)):
	Define POSIX version inline.
	(path::_M_append(path)): Define inline.
	* include/experimental/bits/fs_path.h (path::is_absolute()): Move
	definition out of class body.
	(operator<<(basic_ostream, const path&)): Fix type of delimiter and
	escape characters.
	(operator>>(basic_istream, path&)): Likewise.
	(path::is_absolute()): Define inline and fix for Windows.
	* src/filesystem/dir-common.h (__gnu_posix): New namespace.
	(__gnu_posix::char_type, __gnu_posix::DIR, __gnu_posix::dirent)
	(__gnu_posix::opendir, __gnu_posix::readdir, __gnu_posix::closedir):
	Define as adaptors for Windows functions/types or as
	using-declarations for POSIX functions/types.
	(_Dir_base, get_file_type): Qualify names to use declarations from
	__gnu_posix namespace.
	(_Dir_base::is_dor_or_dotdot): New helper functions.
	* src/filesystem/dir.cc (_Dir, recursive_directory_iterator): Qualify
	names to use declarations from __gnu_posix namespace.
	* src/filesystem/ops-common.h (__gnu_posix): New nested namespace.
	(__gnu_posix::open, __gnu_posix::close, __gnu_posix::stat_type)
	(__gnu_posix::stat, __gnu_posix::lstat, __gnu_posix::mode_t)
	(__gnu_posix::chmod, __gnu_posix::mkdir, __gnu_posix::getcwd)
	(__gnu_posix::chdir, __gnu_posix::utimbuf, __gnu_posix::utime)
	(__gnu_posix::rename, __gnu_posix::truncate, __gnu_posix::char_type):
	Define as adaptors for Windows functions/types or as
	using-declarations for POSIX functions/types.
	(stat_type, do_copy_file): Qualify names to use declarations from
	__gnu_posix namespace.
	(do_space): Declare new function.
	(make_file_type): Only use S_ISLNK if defined.
	* src/filesystem/ops.cc (char_ptr, filesystem::canonical): Use
	path::value_type not char.
	(filesystem::copy, create_dir, filesystem::create_directory): Qualify
	names to use declarations from __gnu_posix namespace.
	(filesystem::create_hard_link): Check HAVE_LINK autoconf macro and
	add implementation for Windows.
	(filesystem::create_symlink): Check HAVE_SYMLINK autoconf macro.
	(filesystem::current_path(error_code&)): Use __gnu_posix::getcwd.
	[!_PC_PATH_MAX]: Don't use pathconf.
	[PATH_MAX]: Use if defined.
	(filesystem::current_path(const path&, error_code&))
	(filesystem::equivalent, do_stat, filesystem::hard_link_count)
	(filesystem::last_write_time, filesystem::permissions): Use names
	from __gnu_posix.
	(filesystem::read_symlink): Check HAVE_READLINK autoconf macro.
	(filesystem::remove) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Add
	implementation for Windows.
	(filesystem::rename, filesystem::resize_file): Use names from
	__gnu_posix.
	(filesystem::space): Use do_space.
	[_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Get absolute path to directory.
	(filesystem::status, filesystem::symlink_status): Use names from
	__gnu_posix.
	(filesystem::temp_directory_path): Add implementation for Windows.
	* src/filesystem/path.cc (dot): Define constant.
	(path::replace_extension): Use dot.
	(path::_M_find_extension): Likewise. Use path::string_type not
	std::string.
	(path::_M_split_cmpts): Use dot.
	(filesystem_error::_M_get_what): Use u8string() not native().
	* src/filesystem/std-dir.cc (_Dir, recursive_directory_iterator):
	Qualify names to use declarations from __gnu_posix namespace.
	* src/filesystem/std-ops.cc (filesystem::absolute(const path&)): Use
	correct error_code.
	(filesystem::absolute(const path&, error_code&)): Add implementation
	for Windows.
	(char_ptr, filesystem::canonical): Use path::value_type not char.
	(do_copy_file): Use names from __gnu_posix.
	[_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Do not use fchmod, fchmodat or
	sendfile.
	(filesystem::copy, create_dir, filesystem::create_directory): Qualify
	names to use declarations from __gnu_posix namespace.
	(filesystem::create_hard_link): Check HAVE_LINK autoconf macro and
	add implementation for Windows.
	(filesystem::create_symlink): Check HAVE_SYMLINK autoconf macro.
	(filesystem::current_path(error_code&)): Use __gnu_posix::getcwd.
	[!_PC_PATH_MAX]: Don't use pathconf.
	[PATH_MAX]: Use if defined.
	(filesystem::current_path(const path&, error_code&))
	(filesystem::equivalent, do_stat, filesystem::hard_link_count)
	(filesystem::last_write_time, filesystem::permissions): Use names
	from __gnu_posix.
	(filesystem::read_symlink): Check HAVE_READLINK autoconf macro.
	(filesystem::remove) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Add
	implementation for Windows.
	(filesystem::rename, filesystem::resize_file): Use names from
	__gnu_posix.
	(do_space): Define.
	(filesystem::space): Use do_space.
	(filesystem::status, filesystem::symlink_status): Use names from
	__gnu_posix.
	(filesystem::temp_directory_path): Add implementation for Windows.
	* src/filesystem/std-path.cc
	[_GLIBCXX_FILESYSTEM_IS_WINDOWS] (path::operator/=(const path&)):
	Define for Windows.
	(dot): Define constant.
	(path::replace_extension, is_dot): Use dot.
	(path::lexically_normal): Check _M_type instead of calling
	non-existent function.
	(path::_M_find_extension): Use dot. Use path::string_type not
	std::string.
	(path::_M_split_cmpts): Use dot.
	(filesystem_error::_M_get_what): Use u8string() not native().
	* testsuite/27_io/filesystem/iterators/directory_iterator.cc: Do not
	use symlinks.
	* testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
	Likewise.
	* testsuite/27_io/filesystem/operations/absolute.cc: Use
	__gnu_test::root_path() instead of "/" and add Windows-specific tests.
	* testsuite/27_io/filesystem/operations/canonical.cc: Use
	path::string() to get narrow string, not path::native().
	* testsuite/27_io/filesystem/operations/copy.cc: Construct fstreams
	with std::filesystem::path not std::basic_string.
	* testsuite/27_io/filesystem/operations/copy_file.cc: Likewise.
	* testsuite/27_io/filesystem/operations/exists.cc: Use
	__gnu_test::root_path() instead of "/".
	* testsuite/27_io/filesystem/operations/is_empty.cc: Construct
	fstreams with std::filesystem::path not std::basic_string.
	* testsuite/27_io/filesystem/operations/last_write_time.cc: Use
	path::string() to get narrow string.
	* testsuite/27_io/filesystem/operations/space.cc: Check results for
	errors, expect sensible values otherwise.
	* testsuite/27_io/filesystem/operations/temp_directory_path.cc: Add
	helpers for adjusting the environment on Windows.
	* testsuite/27_io/filesystem/path/append/path.cc: Test
	Windows-specific behaviour.
	* testsuite/27_io/filesystem/path/construct/format.cc: Fix creation
	of path::string_type objects.
	* testsuite/27_io/filesystem/path/construct/locale.cc: Compare native
	string to wide string on Windows.
	* testsuite/27_io/filesystem/path/decompose/root_directory.cc: Allow
	for backslash as root-directory.
	* testsuite/27_io/filesystem/path/decompose/stem.cc: Use
	path::string() to get narrow string.
	* testsuite/27_io/filesystem/path/itr/traversal.cc: Test Windows-style
	paths.
	* testsuite/27_io/filesystem/path/native/string.cc: Use string_type
	not std::string.
	* testsuite/27_io/filesystem/path/query/is_absolute.cc: Adjust for
	different definintion of absolute paths on Windows.
	* testsuite/experimental/filesystem/iterators/directory_iterator.cc:
	Do not use symlinks.
	* testsuite/experimental/filesystem/operations/absolute.cc: Test
	Windows behaviour.
	* testsuite/experimental/filesystem/operations/copy.cc: Construct
	fstreams with NTCTS not std::basic_string.
	* testsuite/experimental/filesystem/operations/copy_file.cc: Likewise.
	* testsuite/experimental/filesystem/operations/exists.cc: Use
	__gnu_test::root_path() instead of "/".
	* testsuite/experimental/filesystem/operations/is_empty.cc: Construct
	fstreams with NTCTS not std::basic_string.
	* testsuite/experimental/filesystem/operations/last_write_time.cc:
	Use path::string() to get narrow string.
	* testsuite/experimental/filesystem/operations/space.cc: Use
	__gnu_test::root_path() instead of "/".
	* testsuite/experimental/filesystem/operations/temp_directory_path.cc:
	Add helpers for adjusting the environment on Windows.
	* testsuite/experimental/filesystem/path/append/path.cc: Use
	path::string() to get narrow strings for comparisons.
	* testsuite/experimental/filesystem/path/concat/path.cc: Likewise.
	* testsuite/experimental/filesystem/path/decompose/root_directory.cc:
	Likewise.
	* testsuite/experimental/filesystem/path/decompose/stem.cc: Likewise.
	* testsuite/experimental/filesystem/path/native/string.cc: Use
	string_type not std::string.
	* testsuite/experimental/filesystem/path/query/is_absolute.cc:
	Adjust for different definintion of absolute paths on Windows.
	* testsuite/util/testsuite_fs.h (__gnu_test::root_path()): New
	function.
	(__gnu_test::scoped_file): Construct fstreams with NTCTS not
	std::basic_string.

From-SVN: r261034
 2018-05-31 20:20:24 +01:00
Jonathan Wakely 49d729eaee Refactor path construction from null terminated iterator ranges 
Move duplicated code to new _S_string_from_iter function and fix
constraints to accept iterators with const value type.

	* include/bits/fs_path.h (path::__is_encoded_char): Change from class
	template to alias template.
	(path::__value_type_is_char): Use remove_const_t.
	(path:_S_string_from_iter): New helper function.
	(path::_S_convert(InputIter, __null_terminated))
	(path::_S_convert_loc(InputIter, __null_terminated, const locale&)):
	Use _S_string_from_iter.
	(path::string<_CharT, _Allocator>(const _Allocator&)): Allow sharing
	rep for COW strings.
	* include/experimental/bits/fs_path.h (path::__is_encoded_char):
	Change from class template to alias template.
	(path::__value_type_is_char): Use remove_const.
	(path:_S_string_from_iter): New helper function.
	(path::_S_convert(InputIter, __null_terminated))
	(path::_S_convert_loc(InputIter, __null_terminated, const locale&)):
	Use _S_string_from_iter.
	* testsuite/27_io/filesystem/path/append/source.cc: Test appending
	wide strings.
	* testsuite/27_io/filesystem/path/concat/strings.cc: Check for exact
	string equality, not path equivalence.
	* testsuite/27_io/filesystem/path/construct/format.cc: Check
	construction from std::string and std::wstring and input iterators.
	* testsuite/27_io/filesystem/path/construct/locale.cc: Check
	construction from iterators.
	* testsuite/experimental/filesystem/path/concat/strings.cc: Check for
	exact string equality, not path equivalence.
	* testsuite/experimental/filesystem/path/construct/locale.cc: Check
	construction from iterators.

From-SVN: r260628
 2018-05-23 23:48:51 +01:00
Jonathan Wakely cf290ea325 Fix handling of an empty filename at end of a path 
The C++17 std::filesystem::path grammar allows an empty filename as the
last component (to signify a trailing slash). The existing code does not
handle this consistently, sometimes an empty filename has type _Multi
and sometimes it has type _Filename. This can result in a non-empty
iterator range for an empty filename component.

This change ensures that empty paths always have type _Filename and will
yield an empty iterator range.

	* include/bits/fs_path.h (path::_M_type): Change default member
	initializer to _Filename.
	(path::begin): Create past-the-end iterator for empty path.
	* src/filesystem/std-path.cc (path::remove_filename()): Remove
	debugging check.
	(path::has_relative_path()): Return false for empty filenames.
	(path::_M_split_cmpts): Set _M_type to _Filename for empty paths.
	Fix offset of empty final component.
	* testsuite/27_io/filesystem/path/itr/components.cc: New.
	* testsuite/27_io/filesystem/path/itr/traversal.cc: Add new inputs.

From-SVN: r260616
 2018-05-23 17:11:06 +01:00
Jonathan Wakely c3b61fdadd PR libstdc++/83891 fix path::is_absolute() for non-POSIX targets 
The correct definition seems to be has_root_directory() for all systems
we care about.

	PR libstdc++/83891
	* include/bits/fs_path.h (path::is_absolute()): Use same definition
	for all operating systems.
	* include/experimental/bits/fs_path.h (path::is_absolute()): Likewise.
	* testsuite/27_io/filesystem/path/query/is_absolute.cc: New.
	* testsuite/27_io/filesystem/path/query/is_relative.cc: Fix comment.
	* testsuite/experimental/filesystem/path/query/is_absolute.cc: New.

From-SVN: r260259
 2018-05-15 14:50:49 +01:00
Jonathan Wakely 6cda876da2 PR libstdc++/84159 fix appending strings to paths 
The path::operator/=(const Source&) and path::append overloads were
still following the semantics of the Filesystem TS not C++17. Only
the path::operator/=(const path&) overload was correct.

This change adds more tests for path::operator/=(const path&) and adds
new tests to verify that the other append operations have equivalent
behaviour.

	PR libstdc++/84159
	* include/bits/fs_path.h (path::operator/=, path::append): Construct
	temporary path before calling _M_append.
	(path::_M_append): Change parameter to path and implement C++17
	semantics.
	* testsuite/27_io/filesystem/path/append/path.cc: Add helper function
	and more examples from the standard.
	* testsuite/27_io/filesystem/path/append/source.cc: New.
	* testsuite/27_io/filesystem/path/decompose/filename.cc: Add comment.
	* testsuite/27_io/filesystem/path/nonmember/append.cc: New.

From-SVN: r260255
 2018-05-15 13:07:09 +01:00
Jonathan Wakely a989f6378b PR libstdc++/85671 allow copy elision in path concatenation 
By performing the /= operation on a named local variable instead of a
temporary the copy made for the return value can be elided.

	PR libstdc++/85671
	* include/bits/fs_path.h (operator/): Permit copy elision.
	* include/experimental/bits/fs_path.h (operator/): Likewise.

From-SVN: r260009
 2018-05-07 18:26:28 +01:00
Jakub Jelinek 85ec4feb11 Update copyright years. 
From-SVN: r256169
 2018-01-03 11:03:58 +01:00
Jonathan Wakely d69f1ec7d1 Add [[nodiscard]] attribute to C++17 components 
* include/bits/fs_path.h (path::empty): Add nodiscard attribute.
	* include/bits/range_access.h (empty): Likewise.
	* include/std/string_view (basic_string_view::empty): Likewise.
	* testsuite/21_strings/basic_string_view/capacity/empty_neg.cc: New
	test.
	* testsuite/24_iterators/range_access_cpp17_neg.cc: New test.
	* testsuite/27_io/filesystem/path/query/empty_neg.cc: New test.

From-SVN: r255124
 2017-11-23 22:11:21 +00:00
Jonathan Wakely 0348dd008a Define std::filesystem::path::format enum (P0430R2) 
* include/bits/fs_path.h (path::format): Define new enumeration type.
	(path(string_type&&), path<Source>(const Source&))
	(path<InputIterator>(InputIterator, InputIterator))
	(path<Source>(const Source&, const locale&))
	(path<InputIterator>(InputIterator, InputIterator, const locale&)):
	Add format parameter.
	* testsuite/27_io/filesystem/path/construct/format.cc: New test.

From-SVN: r254144
 2017-10-27 13:01:49 +01:00
Jonathan Wakely 641cb5a675 Implement C++17 Filesystem library 
Based on Filesystem TS implementation, with the changes applied by:

- P0219R1 Relative Paths for Filesystem
- P0317R1 Directory Entry Caching for Filesystem
- P0492R2 Resolution of C++17 National Body Comments

Where appropriate code is shared between the TS and C++17
implementations.

	* include/Makefile.am: Add new headers for C++17 filesystem library.
	* include/Makefile.in: Regenerate.
	* include/bits/fs_dir.h: New header, based on Filesystem TS code in
	include/experimental/bits directory.
	* include/bits/fs_fwd.h: Likewise.
	* include/bits/fs_ops.h: Likewise.
	* include/bits/fs_path.h: Likewise.
	* include/experimental/bits/fs_dir.h: Rename Doxygen group.
	* include/experimental/bits/fs_fwd.h: Likewise.
	* include/experimental/bits/fs_ops.h: Likewise.
	* include/experimental/bits/fs_path.h: Likewise.
	* include/experimental/filesystem (filesystem_error::_M_gen_what):
	Remove inline definition.
	* include/precompiled/stdc++.h: Add <filesystem> to precompiled
	header.
	* include/std/filesystem: New header.
	* python/libstdcxx/v6/printers.py: Enable printer for std::filesystem
	paths.
	* src/filesystem/Makefile.am: Add new files. Compile as C++17.
	* src/filesystem/Makefile.in: Regenerate.
	* src/filesystem/cow-dir.cc: Update comment.
	* src/filesystem/cow-ops.cc: Likewise.
	* src/filesystem/cow-path.cc: Likewise.
	* src/filesystem/cow-std-dir.cc: New file.
	* src/filesystem/cow-std-ops.cc: New file.
	* src/filesystem/cow-std-path.cc: New file.
	* src/filesystem/dir-common.h (_Dir_base, get_file_type): New header
	for common code.
	* src/filesystem/dir.cc (_Dir): Derive from _Dir_base.
	(open_dir): Move to _Dir_base constructor.
	(get_file_type): Move to dir-common.h.
	(recurse): Move to _Dir_base::should_recurse.
	* src/filesystem/ops-common.h: New header for common code.
	* src/filesystem/ops.cc (is_set, make_file_type, make_file_status)
	(is_not_found_errno, file_time, do_copy_file): Move to ops-common.h.
	* src/filesystem/path.cc (filesystem_error::_M_gen_what): Define.
	* src/filesystem/std-dir.cc: New file, based on Filesystem TS code.
	* src/filesystem/std-ops.cc: Likewise.
	* src/filesystem/std-dir.cc: Likewise.
	* testsuite/27_io/filesystem/iterators/directory_iterator.cc: New
	test.
	* testsuite/27_io/filesystem/iterators/pop.cc: New test.
	* testsuite/27_io/filesystem/iterators/recursive_directory_iterator.cc:
	New test.
	* testsuite/27_io/filesystem/operations/absolute.cc: New test.
	* testsuite/27_io/filesystem/operations/canonical.cc: New test.
	* testsuite/27_io/filesystem/operations/copy.cc: New test.
	* testsuite/27_io/filesystem/operations/copy_file.cc: New test.
	* testsuite/27_io/filesystem/operations/create_directories.cc: New
	test.
	* testsuite/27_io/filesystem/operations/create_directory.cc: New test.
	* testsuite/27_io/filesystem/operations/create_symlink.cc: New test.
	* testsuite/27_io/filesystem/operations/current_path.cc: New test.
	* testsuite/27_io/filesystem/operations/equivalent.cc: New test.
	* testsuite/27_io/filesystem/operations/exists.cc: New test.
	* testsuite/27_io/filesystem/operations/file_size.cc: New test.
	* testsuite/27_io/filesystem/operations/is_empty.cc: New test.
	* testsuite/27_io/filesystem/operations/last_write_time.cc: New test.
	* testsuite/27_io/filesystem/operations/permissions.cc: New test.
	* testsuite/27_io/filesystem/operations/proximate.cc: New test.
	* testsuite/27_io/filesystem/operations/read_symlink.cc: New test.
	* testsuite/27_io/filesystem/operations/relative.cc: New test.
	* testsuite/27_io/filesystem/operations/remove_all.cc: New test.
	* testsuite/27_io/filesystem/operations/space.cc: New test.
	* testsuite/27_io/filesystem/operations/status.cc: New test.
	* testsuite/27_io/filesystem/operations/symlink_status.cc: New test.
	* testsuite/27_io/filesystem/operations/temp_directory_path.cc: New
	test.
	* testsuite/27_io/filesystem/operations/weakly_canonical.cc: New test.
	* testsuite/27_io/filesystem/path/append/path.cc: New test.
	* testsuite/27_io/filesystem/path/assign/assign.cc: New test.
	* testsuite/27_io/filesystem/path/assign/copy.cc: New test.
	* testsuite/27_io/filesystem/path/compare/compare.cc: New test.
	* testsuite/27_io/filesystem/path/compare/path.cc: New test.
	* testsuite/27_io/filesystem/path/compare/strings.cc: New test.
	* testsuite/27_io/filesystem/path/concat/path.cc: New test.
	* testsuite/27_io/filesystem/path/concat/strings.cc: New test.
	* testsuite/27_io/filesystem/path/construct/copy.cc: New test.
	* testsuite/27_io/filesystem/path/construct/default.cc: New test.
	* testsuite/27_io/filesystem/path/construct/locale.cc: New test.
	* testsuite/27_io/filesystem/path/construct/range.cc: New test.
	* testsuite/27_io/filesystem/path/construct/string_view.cc: New test.
	* testsuite/27_io/filesystem/path/decompose/extension.cc: New test.
	* testsuite/27_io/filesystem/path/decompose/filename.cc: New test.
	* testsuite/27_io/filesystem/path/decompose/parent_path.cc: New test.
	* testsuite/27_io/filesystem/path/decompose/relative_path.cc: New
	test.
	* testsuite/27_io/filesystem/path/decompose/root_directory.cc: New
	test.
	* testsuite/27_io/filesystem/path/decompose/root_name.cc: New test.
	* testsuite/27_io/filesystem/path/decompose/root_path.cc: New test.
	* testsuite/27_io/filesystem/path/decompose/stem.cc: New test.
	* testsuite/27_io/filesystem/path/generation/normal.cc: New test.
	* testsuite/27_io/filesystem/path/generation/proximate.cc: New test.
	* testsuite/27_io/filesystem/path/generation/relative.cc: New test.
	* testsuite/27_io/filesystem/path/generic/generic_string.cc: New test.
	* testsuite/27_io/filesystem/path/itr/traversal.cc: New test.
	* testsuite/27_io/filesystem/path/modifiers/clear.cc: New test.
	* testsuite/27_io/filesystem/path/modifiers/make_preferred.cc: New
	test.
	* testsuite/27_io/filesystem/path/modifiers/remove_filename.cc: New
	test.
	* testsuite/27_io/filesystem/path/modifiers/replace_extension.cc: New
	test.
	* testsuite/27_io/filesystem/path/modifiers/replace_filename.cc: New
	test.
	* testsuite/27_io/filesystem/path/modifiers/swap.cc: New test.
	* testsuite/27_io/filesystem/path/native/string.cc: New test.
	* testsuite/27_io/filesystem/path/nonmember/hash_value.cc: New test.
	* testsuite/27_io/filesystem/path/query/empty.cc: New test.
	* testsuite/27_io/filesystem/path/query/has_extension.cc: New test.
	* testsuite/27_io/filesystem/path/query/has_filename.cc: New test.
	* testsuite/27_io/filesystem/path/query/has_parent_path.cc: New test.
	* testsuite/27_io/filesystem/path/query/has_relative_path.cc: New
	test.
	* testsuite/27_io/filesystem/path/query/has_root_directory.cc: New
	test.
	* testsuite/27_io/filesystem/path/query/has_root_name.cc: New test.
	* testsuite/27_io/filesystem/path/query/has_root_path.cc: New test.
	* testsuite/27_io/filesystem/path/query/has_stem.cc: New test.
	* testsuite/27_io/filesystem/path/query/is_relative.cc: New test.
	* testsuite/experimental/filesystem/path/construct/string_view.cc:
	Define USE_FILESYSTEM_TS.
	* testsuite/util/testsuite_fs.h: Allow use with C++17 paths as well
	as Filesystem TS.

From-SVN: r254008
 2017-10-23 13:11:22 +01:00