PR libstdc++/84601
* include/std/optional (_Optional_payload): Split into multiple
specializations that can handle different cases of trivial or
non-trivial assignment operators.
* testsuite/20_util/optional/84601.cc: New.
* testsuite/20_util/optional/cons/value_neg.cc: Adjust.
From-SVN: r258304
PR libstdc++/83658
* include/std/any (any::__do_emplace): Only set _M_manager after
constructing the contained object.
* testsuite/20_util/any/misc/any_cast_neg.cc: Adjust dg-error line.
* testsuite/20_util/any/modifiers/83658.cc: New test.
From-SVN: r257141
* include/std/optional (_Optional_payload): Fix the comment in
the class head and turn into a primary and one specialization.
(_Optional_payload::_M_engaged): Strike the NSDMI.
(_Optional_payload<_Tp, false>::operator=(const _Optional_payload&)):
New.
(_Optional_payload<_Tp, false>::operator=(_Optional_payload&&)):
Likewise.
(_Optional_payload<_Tp, false>::_M_get): Likewise.
(_Optional_payload<_Tp, false>::_M_reset): Likewise.
(_Optional_base_impl): Likewise.
(_Optional_base): Turn into a primary and three specializations.
(optional(nullopt)): Change the base init.
* testsuite/20_util/optional/assignment/8.cc: New.
* testsuite/20_util/optional/cons/trivial.cc: Likewise.
* testsuite/20_util/optional/cons/value_neg.cc: Adjust.
From-SVN: r256694
PR libstdc++/83427
* include/bits/refwrap.h (_Maybe_unary_or_binary_function): Move here
from <bits/std_function.h>.
(_Mem_fn_traits_base, _Mem_fn_traits): Move here, from <functional>.
(_Weak_result_type_impl, _Reference_wrapper_base): Deduce noexcept
for function types. Remove partial specializations for member
functions.
(_Weak_result_type_impl): Remove unused partial specializations for
non-referenceable function types and for references to functions.
(_Weak_result_type_memfun, _Reference_wrapper_base_memfun): New
helpers to handle member functions via _Mem_fn_traits.
(_Weak_result_type, reference_wrapper): Derive from new helpers.
* include/bits/std_function.h (_Maybe_unary_or_binary_function): Move
to <bits/refwrap.h>.
* include/std/functional (_Pack, _AllConvertible, _NotSame): Remove.
(_Mem_fn_traits_base, _Mem_fn_traits): Move to <bits/refwrap.h>.
* testsuite/20_util/bind/83427.cc: New test.
* testsuite/20_util/bind/refqual.cc: Add noexcept to functions and
check for weak result types.
* testsuite/20_util/reference_wrapper/83427.cc: New test.
From-SVN: r255651
PR libstdc++/59568
* include/std/complex (operator>>): Implement proposed resolution to
LWG 2714. Use putback if and only if a character has been successfully
extracted but isn't a delimiter. Use ctype::widen and traits::eq when
testing if extracted characters match delimiters.
* testsuite/26_numerics/complex/dr2714.cc: New test.
From-SVN: r255608
* include/experimental/string_view (basic_string_view::_S_compare):
Use value-init so narrowing conversions are not ill-formed.
* include/std/string_view (basic_string_view::_S_compare): Likewise.
From-SVN: r255321
* include/std/fstream (basic_ifstream, basic_ofstream, basic_fstream):
Remove outdated comments about calling c_str() to create a file stream
from a std::string.
(basic_ofstream::basic_ofstream, basic_ofstream::open): Remove
redundant ios_mode::trunc bits from default arguments and comments.
From-SVN: r254226
* include/bits/hashtable_policy.h: Include <tuple>.
* include/std/unordered_map: Only include <bits/stl_pair.h> instead
of <utility> and <tuple>.
* include/std/unordered_set: Likewise.
From-SVN: r254223
PR libstdc++/82716
* include/std/array (tuple_size, tuple_element): Change class-key
from class to struct, to avoid annoying Clang warnings.
From-SVN: r254077
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
* include/std/chrono (__cpp_lib_chrono): Update macro value to
indicate support for P0505R0.
* testsuite/20_util/duration/arithmetic/constexpr_c++17.cc: Check
for updated macro.
From-SVN: r253959
This adds the integral overloads of std::to_chars and std::from_chars,
including the changes made by P0682R0. Support for floating point types
is absent.
* include/Makefile.am: Add new <charconv> header.
* include/Makefile.in: Regenerate.
* include/precompiled/stdc++.h: Include <charconv>.
* include/std/charconv: New file.
(to_chars_result, to_chars, from_chars_result, from_chars): Define.
* testsuite/20_util/from_chars/1.cc: New test.
* testsuite/20_util/from_chars/1_neg.cc: New test.
* testsuite/20_util/from_chars/2.cc: New test.
* testsuite/20_util/from_chars/requirements.cc: New test.
* testsuite/20_util/to_chars/1.cc: New test.
* testsuite/20_util/to_chars/1_neg.cc: New test.
* testsuite/20_util/to_chars/2.cc: New test.
* testsuite/20_util/to_chars/requirements.cc: New test.
From-SVN: r253353
PR libstdc++/82262
* include/std/optional (__optional_hash_call_base): Add template
parameter for remove_const_t<_Tp> and use it consistently.
* testsuite/20_util/optional/hash.cc: Test optional<const T>.
From-SVN: r253010
PR libstdc++/82254
* include/std/type_traits (__is_invocable): Add partial specialization
for INVOKE<void> case and remove is_void<R> check from partial
specialization for INVOKE<R> case.
(__is_nt_invocable_impl): New helper for is_nothrow_invocable_r.
(is_nothrow_invocable_r): Use __is_nt_invocable_impl.
* testsuite/20_util/is_nothrow_invocable/value.cc: Add tests for
conversions that can throw or fail to convert. Use static assert
strings to explain negative results.
* testsuite/20_util/is_nothrow_invocable/value_ext.cc: Use
is_nothrow_constructible in is_nt_invocable_conv.
From-SVN: r252977
PR libstdc++/71187
* include/std/type_traits (__declval): New function to deduce return
type of declval.
(__declval_protector::_delegate): Remove.
(declval): Use __declval instead of add_rvalue_reference and
__declval_protector::__delegate.
* testsuite/20_util/declval/requirements/1_neg.cc: Adjust dg-error
lineno.
* testsuite/20_util/make_signed/requirements/typedefs_neg.cc:
Likewise.
* testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc:
Likewise.
From-SVN: r252922
PR libstdc++/79433
* doc/xml/manual/status_cxx2017.xml: Update feature-test macros.
* doc/html/*: Regenerate.
* include/Makefile.am: Remove <bits/c++17_warning.h>.
* include/Makefile.in: Regenerate.
* include/bits/c++17_warning.h: Remove.
* include/bits/string_view.tcc: Do not include <bits/c++17_warning.h>
for pre-C++17 modes.
* include/std/any: Likewise.
(__cpp_lib_any): Define.
* include/std/mutex (__cpp_lib_scoped_lock): Adjust value as per new
SD-6 draft.
* include/std/numeric (__cpp_lib_gcd_lcm): Define as per new SD-6
draft.
* include/std/optional: Do not include <bits/c++17_warning.h>.
(__cpp_lib_optional): Define.
* include/std/shared_mutex: Do not include <bits/c++14_warning.h>.
* include/std/string_view: Do not include <bits/c++17_warning.h>.
(__cpp_lib_string_view): Define.
* include/std/variant: Do not include <bits/c++17_warning.h>.
(__cpp_lib_variant): Define.
* testsuite/20_util/optional/cons/value_neg.cc: Adjust dg-error line
numbers.
* testsuite/26_numerics/gcd/1.cc: Test for __cpp_lib_gcd_lcm.
* testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line
numbers.
* testsuite/26_numerics/lcm/1.cc: Test for __cpp_lib_gcd_lcm.
* testsuite/26_numerics/lcm/lcm_neg.cc: Adjust dg-error line
numbers.
* testsuite/30_threads/scoped_lock/requirements/typedefs.cc: Adjust
expected value of __cpp_lib_scoped_lock.
From-SVN: r252018
* include/std/type_traits (_GLIBCXX_NO_BUILTIN_HAS_UNIQ_OBJ_REP):
Replace with _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP and use
__is_identifier to set it.
From-SVN: r251009
* include/bits/ios_base.h (ios_base::io_state, ios_base::open_mode)
(ios_base::seek_dir): Remove for C++17.
* include/std/streambuf (basic_streambuf::stossc): Remove for C++17.
Add deprecated attribute for C++11 and C++14.
* testsuite/27_io/types/1.cc: Don't run for C++17 and later.
* testsuite/27_io/types/4.cc: New.
From-SVN: r250531
2017-07-14 Jason Merrill <jason@redhat.com>
Jonathan Wakely <jwakely@redhat.com>
* include/std/variant (variant::variant(_Tp&&)): Constrain to remove
the constructor for empty variants from the candidate functions
during class template argument deduction.
* testsuite/20_util/variant/deduction.cc: New.
Co-Authored-By: Jonathan Wakely <jwakely@redhat.com>
From-SVN: r250213
PR libstdc++/80187
* include/std/variant (variant::variant, variant::~variant,
variant::operator=): Implement triviality forwarding for four
special member functions.
* testsuite/20_util/variant/compile.cc: Tests.
From-SVN: r249706
* include/std/istream:
(__is_convertible_to_basic_istream_test(basic_istream<_Ch, _Up>*)): New.
(__do_is_convertible_to_basic_istream_impl): Likewise.
(__is_convertible_to_basic_istream_impl): Likewise.
(__is_convertible_to_basic_istream): Use the new base.
(__rvalue_istream_type): New.
(operator>>(_Istream&&, _Tp&&)): Use the new helper alias
for the SFINAE check, convert to the helper alias type before
doing the actual extraction.
* include/std/ostream:
(__is_convertible_to_basic_ostream_test(basic_ostream<_Ch, _Up>*)): New.
(__do_is_convertible_to_basic_ostream_impl): Likewise.
(__is_convertible_to_basic_ostream_impl): Likewise.
(__is_convertible_to_basic_ostream): Use the new base.
(__rvalue_ostream_type): New.
(operator<<(_Ostream&&, const _Tp&)): Use the new helper alias
for the SFINAE check, convert to the helper alias type before
doing the actual insertion.
* testsuite/27_io/rvalue_streams-2.cc: Add new tests.
From-SVN: r249468
PR libstdc++/80478
* include/std/functional (_Mem_fn_traits_base): Add specializations
for noexcept member function types.
* testsuite/20_util/function_objects/mem_fn/80478.cc: New test.
From-SVN: r248245
* include/std/optional: Use a separate static_assert per condition.
* testsuite/20_util/optional/cons/value_neg.cc: Update dg-error line
numbers.
From-SVN: r247748
PR libstdc++/80316
* include/std/future (_State_baseV2::_Setter::operator()): Remove
_S_check calls that are done after the pointer to the shared state is
already dereferenced.
(_State_baseV2::_Setter<_Res, void>): Define specialization for void
as partial specialization so it can be defined within the definition
of _State_baseV2.
(_State_baseV2::__setter): Call _S_check.
(_State_baseV2::__setter(promise<void>*)): Add overload for use by
promise<void>::set_value and promise<void>::set_value_at_thread_exit.
(promise<T>, promise<T&>, promise<void>): Make _State a friend.
(_State_baseV2::_Setter<void, void>): Remove explicit specialization.
(promise<void>::set_value, promise<void>::set_value_at_thread_exit):
Use new __setter overload.
* testsuite/30_threads/promise/members/at_thread_exit2.cc: New test.
* testsuite/30_threads/promise/members/set_exception.cc: Test
promise<T&> and promise<void> specializations.
* testsuite/30_threads/promise/members/set_exception2.cc: Likewise.
Test for no_state error condition.
* testsuite/30_threads/promise/members/set_value2.cc: Likewise.
From-SVN: r247064
* include/std/functional (default_searcher, __boyer_moore_array_base)
(__is_std_equal_to, __boyer_moore_base_t, boyer_moore_searcher)
(boyer_moore_horspool_searcher): Remove redundant namespace
qualification.
(default_searcher::operator()): Construct return value early and
advance second member in-place.
(boyer_moore_horspool_searcher::operator()): Increment random access
iterator directly instead of using std::next.
(boyer_moore_searcher::operator()): Fix return value.
* testsuite/20_util/function_objects/searchers.cc: Check both parts
of return values.
From-SVN: r246964
2017-03-23 Daniel Kruegler <daniel.kruegler@gmail.com>
Implement LWG 2686, Why is std::hash specialized for error_code,
but not error_condition?
* include/std/system_error (hash<error_condition>): Define for C++17.
* testsuite/20_util/hash/operators/size_t.cc (hash<error_condition>):
Instantiate test for error_condition.
* testsuite/20_util/hash/requirements/explicit_instantiation.cc
(hash<error_condition>): Instantiate hash<error_condition>.
From-SVN: r246424
Implement LWG 2857, {variant,optional,any}::emplace should
return the constructed value.
* include/std/any (emplace(_Args&&...)): Change the return type and
return a reference to the constructed value.
(emplace(initializer_list<_Up>, _Args&&...)): Likewise.
* include/std/optional (emplace(_Args&&...)): Likewise.
(emplace(initializer_list<_Up>, _Args&&...)): Likewise.
* include/std/variant (emplace<_Tp>(_Args&&...)): Likewise.
(emplace<_Tp>(initializer_list<_Up>, _Args&&...)): Likewise.
(emplace<_Np>(_Args&&...)): Likewise.
(emplace<_Np>(initializer_list<_Up>, _Args&&...)): Likewise.
* testsuite/20_util/any/assign/emplace.cc: Add tests for
checking the return value of emplace.
* testsuite/20_util/any/misc/any_cast_neg.cc: Adjust.
* testsuite/20_util/optional/assignment/6.cc: Add tests for
checking the return value of emplace.
* testsuite/20_util/variant/run.cc: Likewise.
From-SVN: r246182
* include/bits/invoke.h (__invoke): Use __invoke_result instead of
result_of, and __is_nothrow_invocable instead of
__is_nothrow_callable.
* include/bits/shared_ptr_base.h (__shared_ptr): Use __is_invocable
instead of __is_callable.
* include/std/functional (invoke): use invoke_result_t instead of
result_of_t and is_nothrow_invocable instead of is_nothrow_callable.
(_Not_fn): Use __invoke_result instead of result_of.
* include/std/type_traits (__result_of_memobj, __result_of_memfun):
Remove partial specializations for reference_wrapper types.
(__result_of_impl): Use __inv_unwrap to strip reference_wrapper.
(__invoke_result): Define replacement for result_of and then use it to
define result_of.
(__is_callable_impl, __is_callable, __is_nothrow_callable): Replace
with __is_invocable_impl, __is_invocable, and __is_nothrow_invocable
respectively.
(invoke_result, invoke_result_t): Define for C++17.
(is_callable, is_nothrow_callable): Replace with is_invocable,
is_invocable_r, is_nothrow_invocable, and is_nothrow_invocable_r.
(is_callable_v, is_nothrow_callable_v): Replace with is_invocable_v,
is_invocable_r_v, is_nothrow_invocable_v, and is_nothrow_invocable_r_v.
* include/std/variant (hash<variant<T...>>): Use is_nothrow_invocable_v
instead of is_nothrow_callable_v.
* testsuite/20_util/function_objects/invoke/59768.cc: Remove unused
main function.
* testsuite/20_util/function_objects/not_fn/1.cc: Use is_invocable
instead of is_callable.
* testsuite/20_util/is_callable/*: Rename directory and adjust tests
to use new traits.
* testsuite/20_util/is_notjrow_callable/*: Likewise.
* testsuite/20_util/optional/hash.cc: Use is_invocable_v instead of
is_callable.
* testsuite/20_util/variant/hash.cc: Likewise.
From-SVN: r246036
PR libstdc++/79798
* include/std/functional (bind::_Res_type_impl): Fix incorrect use of
result_of that loses top-level cv-qualifiers.
* testsuite/20_util/bind/79798.cc: New test.
From-SVN: r245827
* include/bits/functional_hash.h
(__poison_hash::__enable_hash_call): New.
* include/std/optional (__optional_hash_call_base): New.
(hash<optional<_Tp>>): Derive from the new base,
move the hash function into that base.
* include/std/variant (__variant_hash_call_base_impl): New.
(__variant_hash_call_base): Likewise.
(hash<variant<_Types...>>): Derive from the new base,
move the hash function into that base.
* testsuite/20_util/optional/hash.cc: Add tests for is_callable.
* testsuite/20_util/variant/hash.cc: Likewise.
From-SVN: r244748
PR libstdc++/72792
* include/bits/alloc_traits.h (__allocator_traits_base::__diff_type)
(__allocator_traits_base::__size_type): Remove.
(allocator_traits::_Ptr): New class template to detect const and void
pointer types without instantiating pointer_traits::rebind
unnecessarily.
(allocator_traits::_Diff): Likewise for detecting difference_type.
(allocator_traits::_Size): New class template to detect size_type
without instantiating make_unsigned unnecessarily.
* include/bits/ptr_traits.h (pointer_traits::element_type): Use
__detected_or_t instead of __detected_or_t_.
* include/std/type_traits (__detected_or_t_): Remove.
* testsuite/20_util/allocator_traits/members/pointers.cc: New test.
From-SVN: r244706
Reduce the size of variant, it doesn't need an index of
type size_t internally.
* include/std/variant (parse_numbers.h): New include.
(__select_index): New.
(_Variant_storage<false, _Types...>::_M_reset_impl): Use
_index_type for comparison with variant_npos.
(_Variant_storage<false, _Types...>::__index_type): New.
(_Variant_storage<false, _Types...>::_M_index): Change the
type from size_t to __index_type.
(_Variant_storage<true, _Types...>::__index_type): New.
(_Variant_storage<true, _Types...>::_M_index): Change the
type from size_t to __index_type.
(_Variant_base::_M_valid): Use _Storage::__index_type
for comparison with variant_npos.
(variant::index): Use _Base::_Storage::__index_type
for comparison with variant_npos.
* testsuite/20_util/variant/index_type.cc: New.
From-SVN: r244309
François Dumont