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988b853f9c
gcc/libstdc++-v3/include/bits
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Jonathan Wakely 988b853f9c libstdc++: Simplify filesystem::path SFINAE constraints 
This replaces the filesystem::__detail::_Path SFINAE helper with two
separate helpers, _Path and _Path2. This avoids having one helper which
tries to check two different sets of requirements.

The _Path helper now uses variable templates instead of a set of
overloaded functions to detect specializations of basic_string or
basic_string_view.

The __not_<is_void<remove_pointer_t<_Tp1>> check is not necessary in
C++20 because iterator_traits<void*> is now empty. For C++17 replace
that check with a __safe_iterator_traits helper with partial
specializations for void pointers.

Finally, the __is_encoded_char check no longer uses remove_const_t,
which means that iterators with a const value_type will no longer be
accepted as arguments for path creation. Such iterators resulted in
undefined behaviour anyway, so it's still conforming to reject them in
the constraint checks.

	* include/bits/fs_path.h (filesystem::__detail::__is_encoded_char):
	Replace alias template with variable template. Don't remove const.
	(filesystem::__detail::__is_path_src): Replace overloaded function
	template with variable template and specializations.
	(filesystem::__detail::__is_path_iter_src): Replace alias template
	with class template.
	(filesystem::__detail::_Path): Use __is_path_src. Remove support for
	iterator pairs.
	(filesystem::__detail::_Path2): New alias template for checking
	InputIterator requirements.
	(filesystem::__detail::__constructible_from): Remove.
	(filesystem::path): Replace _Path<Iter, Iter> with _Path2<Iter>.
	* testsuite/27_io/filesystem/path/construct/80762.cc: Check with two
	constructor arguments of void and void* types.
2020-05-23 09:40:16 +01:00
..
algorithmfwd.h Update copyright years. 2020-01-01 12:51:42 +01:00
alloc_traits.h libstdc++: Avoid errors in allocator's noexcept-specifier (PR 89510) 2020-04-30 16:01:43 +01:00
allocated_ptr.h Update copyright years. 2020-01-01 12:51:42 +01:00
allocator.h libstdc++: Avoid errors in allocator's noexcept-specifier (PR 89510) 2020-04-30 16:01:43 +01:00
atomic_base.h Implent C++20 std::atomic_flag::test 2020-05-12 07:37:09 +02:00
atomic_futex.h Update copyright years. 2020-01-01 12:51:42 +01:00
basic_ios.h Update copyright years. 2020-01-01 12:51:42 +01:00
basic_ios.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
basic_string.h libstdc++: Add comparison operators for string and regex types 2020-04-17 16:40:11 +01:00
basic_string.tcc libstdc++: Fix outdated comment about std::string instantiations (PR 94854) 2020-04-29 19:00:58 +01:00
boost_concept_check.h libstdc++: Make _GLIBCXX_CONCEPT_CHECKS more constexpr-friendly 2020-02-27 10:52:28 +00:00
c++0x_warning.h Update copyright years. 2020-01-01 12:51:42 +01:00
c++config libstdc++: Fix freestanding build PR 92376) 2020-01-17 17:03:46 +00:00
char_traits.h libstdc++: Add comparison operators for string and regex types 2020-04-17 16:40:11 +01:00
charconv.h Update copyright years. 2020-01-01 12:51:42 +01:00
codecvt.h Update copyright years. 2020-01-01 12:51:42 +01:00
concept_check.h Update copyright years. 2020-01-01 12:51:42 +01:00
cpp_type_traits.h libstdc++: Fix comment on __memcpyable 2020-03-04 15:35:20 +00:00
deque.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
enable_special_members.h Update copyright years. 2020-01-01 12:51:42 +01:00
erase_if.h libstdc++: Update __cpp_lib_erase_if macro (P1115R3) 2020-02-15 10:25:23 +00:00
forward_list.h libstdc++: Add comparison operators to sequence containers 2020-04-17 23:41:04 +01:00
forward_list.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
fs_dir.h libstdc++: Add comparison operators to std::filesystem types 2020-04-15 21:01:42 +01:00
fs_fwd.h libstdc++: Add comparison operators to std::filesystem types 2020-04-15 21:01:42 +01:00
fs_ops.h Update copyright years. 2020-01-01 12:51:42 +01:00
fs_path.h libstdc++: Simplify filesystem::path SFINAE constraints 2020-05-23 09:40:16 +01:00
fstream.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
functexcept.h Update copyright years. 2020-01-01 12:51:42 +01:00
functional_hash.h Update copyright years. 2020-01-01 12:51:42 +01:00
gslice_array.h Update copyright years. 2020-01-01 12:51:42 +01:00
gslice.h Update copyright years. 2020-01-01 12:51:42 +01:00
hashtable_policy.h libstdc++ Hastable: Move std::is_permutation to limit includes 2020-02-29 18:40:39 +01:00
hashtable.h libstdc++: Add missing std:: qualification of a forward call 2020-02-12 22:09:41 +01:00
indirect_array.h Update copyright years. 2020-01-01 12:51:42 +01:00
int_limits.h libstdc++: Add lightweight replacement for std::numeric_limits (PR 92546) 2020-02-17 15:11:04 +00:00
invoke.h Update copyright years. 2020-01-01 12:51:42 +01:00
ios_base.h Update copyright years. 2020-01-01 12:51:42 +01:00
istream.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
iterator_concepts.h libstdc++: Avoid constraint recursion with iterator_traits (PR 93983) 2020-05-21 07:32:15 +01:00
list.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
locale_classes.h libstdc++: Add comparison operators to types from Utilities clause 2020-04-15 19:47:48 +01:00
locale_classes.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
locale_conv.h Update copyright years. 2020-01-01 12:51:42 +01:00
locale_facets_nonio.h Update copyright years. 2020-01-01 12:51:42 +01:00
locale_facets_nonio.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
locale_facets.h Update copyright years. 2020-01-01 12:51:42 +01:00
locale_facets.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
localefwd.h Update copyright years. 2020-01-01 12:51:42 +01:00
mask_array.h Update copyright years. 2020-01-01 12:51:42 +01:00
memoryfwd.h Update copyright years. 2020-01-01 12:51:42 +01:00
move.h Update copyright years. 2020-01-01 12:51:42 +01:00
node_handle.h Update copyright years. 2020-01-01 12:51:42 +01:00
ostream_insert.h Update copyright years. 2020-01-01 12:51:42 +01:00
ostream.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
parse_numbers.h libstdc++: Add lightweight replacement for std::numeric_limits (PR 92546) 2020-02-17 15:11:04 +00:00
postypes.h Update copyright years. 2020-01-01 12:51:42 +01:00
predefined_ops.h Update copyright years. 2020-01-01 12:51:42 +01:00
ptr_traits.h libstdc++: Add missing feature test macros 2020-04-22 22:54:34 +01:00
quoted_string.h Update copyright years. 2020-01-01 12:51:42 +01:00
random.h libstdc++: Reduce header dependencies for C++20 (PR 92546) 2020-02-17 15:43:43 +00:00
random.tcc libstdc++: Fix undefined behaviour in random dist serialization (PR93205) 2020-01-09 16:50:51 +00:00
range_access.h libstdc++: Add missing feature test macros 2020-04-22 22:54:34 +01:00
range_cmp.h libstdc++: Define __cpp_lib_ranges macro for C++20 2020-03-27 23:26:03 +00:00
ranges_algo.h libstdc++: Fix some C++20 algorithms to work in parallel mode 2020-05-07 21:43:49 +01:00
ranges_algobase.h libstdc++: Fix incorrect use of memset in ranges::fill_n (PR 94017) 2020-03-03 22:46:39 -05:00
ranges_uninitialized.h libstdc++: Move-only input iterator support in <memory> algorithms (LWG 3355) 2020-03-03 22:44:39 -05:00
refwrap.h libstdc++: Avoid using sizeof with function types (PR 93470) 2020-01-28 13:24:09 +00:00
regex_automaton.h Update copyright years. 2020-01-01 12:51:42 +01:00
regex_automaton.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
regex_compiler.h Update copyright years. 2020-01-01 12:51:42 +01:00
regex_compiler.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
regex_constants.h Update copyright years. 2020-01-01 12:51:42 +01:00
regex_error.h Update copyright years. 2020-01-01 12:51:42 +01:00
regex_executor.h Update copyright years. 2020-01-01 12:51:42 +01:00
regex_executor.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
regex_scanner.h Update copyright years. 2020-01-01 12:51:42 +01:00
regex_scanner.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
regex.h libstdc++: Add comparison operators for string and regex types 2020-04-17 16:40:11 +01:00
regex.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
shared_ptr_atomic.h Update copyright years. 2020-01-01 12:51:42 +01:00
shared_ptr_base.h libstdc++: Add comparison operators to std::shared_ptr (PR 94562) 2020-04-14 21:54:55 +01:00
shared_ptr.h libstdc++: Add comparison operators to std::shared_ptr (PR 94562) 2020-04-14 21:54:55 +01:00
slice_array.h libstdc++: Add comparison operators to types from Numerics clause 2020-04-08 16:51:59 +01:00
specfun.h Update copyright years. 2020-01-01 12:51:42 +01:00
sstream.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
std_abs.h Update copyright years. 2020-01-01 12:51:42 +01:00
std_function.h libstdc++: Add comparison operators to types from Utilities clause 2020-04-15 19:47:48 +01:00
std_mutex.h Update copyright years. 2020-01-01 12:51:42 +01:00
stl_algo.h libstdc++ Hastable: Move std::is_permutation to limit includes 2020-02-29 18:40:39 +01:00
stl_algobase.h libstdc++: Fix some C++20 algorithms to work in parallel mode 2020-05-07 21:43:49 +01:00
stl_bvector.h libstdc++ std::fill overload for std::vector<bool>::iterator 2020-05-06 23:28:22 +02:00
stl_construct.h libstdc++: Fix regression in std::_Construct (PR 94831) 2020-04-28 23:39:38 +01:00
stl_deque.h libstdc++: Add comparison operators to sequence containers 2020-04-17 23:41:04 +01:00
stl_function.h Update copyright years. 2020-01-01 12:51:42 +01:00
stl_heap.h Update copyright years. 2020-01-01 12:51:42 +01:00
stl_iterator_base_funcs.h Update copyright years. 2020-01-01 12:51:42 +01:00
stl_iterator_base_types.h libstdc++: Define __cpp_lib_ranges macro for C++20 2020-03-27 23:26:03 +00:00
stl_iterator.h libstdc++: Fixes for feature test macros (PR 91480) 2020-04-28 23:40:18 +01:00
stl_list.h libstdc++: Add comparison operators to sequence containers 2020-04-17 23:41:04 +01:00
stl_map.h libstdc++: Remove non-standard feature test macros 2020-04-22 22:54:34 +01:00
stl_multimap.h libstdc++: Add comparison operators to associative containers 2020-04-20 17:50:10 +01:00
stl_multiset.h libstdc++: Add comparison operators to associative containers 2020-04-20 17:50:10 +01:00
stl_numeric.h libstdc++: P1645R1 constexpr for <numeric> algorithms 2020-02-26 10:23:17 -05:00
stl_pair.h libstdc++: Fixes for feature test macros (PR 91480) 2020-04-28 23:40:18 +01:00
stl_queue.h libstdc++: Define operator<=> for std::stack and std::queue 2020-04-19 21:30:15 +01:00
stl_raw_storage_iter.h Update copyright years. 2020-01-01 12:51:42 +01:00
stl_relops.h Update copyright years. 2020-01-01 12:51:42 +01:00
stl_set.h libstdc++: Add comparison operators to associative containers 2020-04-20 17:50:10 +01:00
stl_stack.h libstdc++: Define operator<=> for std::stack and std::queue 2020-04-19 21:30:15 +01:00
stl_tempbuf.h Update copyright years. 2020-01-01 12:51:42 +01:00
stl_tree.h libstdc++: Add comparison operators to associative containers 2020-04-20 17:50:10 +01:00
stl_uninitialized.h Update copyright years. 2020-01-01 12:51:42 +01:00
stl_vector.h libstdc++: Add comparison operators to sequence containers 2020-04-17 23:41:04 +01:00
stream_iterator.h libstdc++: Fix compilation with released versions of Clang 2020-03-18 12:55:29 +00:00
streambuf_iterator.h libstdc++: Fix compilation with released versions of Clang 2020-03-18 12:55:29 +00:00
streambuf.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
string_view.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
stringfwd.h Update copyright years. 2020-01-01 12:51:42 +01:00
uniform_int_dist.h libstdc++: Reduce header dependencies for C++20 (PR 92546) 2020-02-17 15:43:43 +00:00
unique_lock.h Update copyright years. 2020-01-01 12:51:42 +01:00
unique_ptr.h libstdc++: Add comparison operators to std::shared_ptr (PR 94562) 2020-04-14 21:54:55 +01:00
unordered_map.h libstdc++: Remove non-standard feature test macros 2020-04-22 22:54:34 +01:00
unordered_set.h libstdc++: Remove operator!= overloads for unordered containers 2020-04-19 21:05:32 +01:00
uses_allocator.h Update copyright years. 2020-01-01 12:51:42 +01:00
valarray_after.h Update copyright years. 2020-01-01 12:51:42 +01:00
valarray_array.h Update copyright years. 2020-01-01 12:51:42 +01:00
valarray_array.tcc Update copyright years. 2020-01-01 12:51:42 +01:00
valarray_before.h Update copyright years. 2020-01-01 12:51:42 +01:00
vector.tcc Update copyright years. 2020-01-01 12:51:42 +01:00