This also provides some of the scaffolding needed by D102992 and D101729, and mops up after D101730 etc.
Differential Revision: https://reviews.llvm.org/D103055
Use the same visiblity attributes as for all other template
specializations in the same file; declare the specialization itself
using _LIBCPP_TYPE_VIS, and don't use _LIBCPP_EXPORTED_FROM_ABI on
the destructor. Methods that are excluded from the ABI are marked
with _LIBCPP_INLINE_VISIBILITY.
This makes the vtable exported from DLL builds of libc++. Practically,
it doesn't make any difference for the CI configuration, but it
can make a difference in mingw setups.
Differential Revision: https://reviews.llvm.org/D102717
Not only do we conscientiously avoid using `__wrap_iter` for non-contiguous
iterators (in vector, string, span...) but also we make the assumption
(in regex) that `__wrap_iter<_Iter>` is contiguous for all `_Iter`.
So `__wrap_iter<reverse_iterator<int*>>` should be considered IFNDR,
and every `__wrap_iter` should correctly advertise contiguity in C++20.
Drive-by simplify some type traits.
Reviewed as part of https://reviews.llvm.org/D102781
This commit alphabetizes all includes in libcxx. This is a NFC.
This can also serve as a pseudo "announcement" for how we should order these headers going forward (note: double underscores go before other headers).
Differential Revision: https://reviews.llvm.org/D102941
This is the second to last one! Based on D101396. Depends on D100255. Refs D101079 and D101193.
Differential Revision: https://reviews.llvm.org/D101476
* adds `sized_range` and conformance tests
* moves `disable_sized_range` into namespace `std::ranges`
* removes explicit type parameter
Implements part of P0896 'The One Ranges Proposal'.
Differential Revision: https://reviews.llvm.org/D102434
Add this attribute to some types to ensure that they have
debug info.
The debug info for these classes are required for debuggers to display
some STL types. With constructor homing (a new debug info optimization)
their debug info isn't emitted because their constructors are never
called.
The list of types with the attribute added are __hash_value_type,
__value_type, __tree_node_base, __tree_node, __hash_node, __list_node,
and __forward_list_node.
Differential Revision: https://reviews.llvm.org/D98750
Fix __bitop_unsigned_integer and rename to __libcpp_is_unsigned_integer.
There are only five unsigned integer types, so we should just list them out.
Also provide `__libcpp_is_signed_integer`, even though the Standard doesn't
consume that trait anywhere yet.
Notice that `concept uniform_random_bit_generator` is specifically specified
to rely on `concept unsigned_integral` and *not* `__is_unsigned_integer`.
Instantiating `std::ranges::sample` with a type `U` satisfying
`uniform_random_bit_generator` where `unsigned_integral<U::result_type>`
and not `__is_unsigned_integer<U::result_type>` is simply IFNDR.
Orthogonally, fix an undefined behavior in std::countr_zero(__uint128_t).
Orthogonally, improve tests for the <bit> manipulation functions.
It was these new tests that detected the bug in countr_zero.
Differential Revision: https://reviews.llvm.org/D102328
Before this commit, we'd get a compilation error because the operator() overload was ambiguous.
Differential Revision: https://reviews.llvm.org/D102263
D85051's honeypot solution was a bit too aggressive swallowed up the
comparison types, which made comparing objects of different ordering
types ambiguous.
Depends on D101707.
Differential Revision: https://reviews.llvm.org/D101708
Both `<type_traits>` and `<charconv>` implemented this function with
different names and a slightly different behavior. This removes the
version in `<charconv>` and improves the version in `<typetraits>`.
- The code can be used again in C++11.
- The original claimed C++14 support, but `[[nodiscard]]` is not
available in C++14.
- Adds `_LIBCPP_INLINE_VISIBILITY`.
Reviewed By: zoecarver, #libc, Quuxplusone
Differential Revision: https://reviews.llvm.org/D102332
C++17 deprecates `std::raw_storage_iterator` and C++20 removes it.
Implements part of:
* P0174R2 'Deprecating Vestigial Library Parts in C++17'
* P0619R4 'Reviewing Deprecated Facilities of C++17 for C++20'
Differential Revision: https://reviews.llvm.org/D101730
The standard leaves it up to the implementation to decide whether or not
these operators are hidden friends. There are several (well-documented)
reasons to prefer hidden friends, as well as an argument for improved
readability.
Depends on D100342.
Differential Revision: https://reviews.llvm.org/D101707
* `operator!=` isn't in the spec
* `<compare>` is designed to work with `operator<=>` so it doesn't
really make sense to have `operator<=>`-less friendly sections.
Depends on D100283.
Differential Revision: https://reviews.llvm.org/D100342
`weak_equality` and `strong_equality` were removed before being
standardised, and need to be removed.
Also adjusts `common_comparison_category` since its test needed
adjusting due to the equality deletions.
Differential Revision: https://reviews.llvm.org/D100283
This is a rough reapplication of the change that fixed std::to_address
to avoid relying on element_type (da456167). It is somewhat different
because the fix to avoid breaking Clang (which caused it to be reverted
in 347f69c55) was a bit more involved.
Differential Revision: https://reviews.llvm.org/D101638
This appears to be a bug in our string::assign: when assigning into
a longer string, from a shorter snippet of itself, we invalidate
iterators before doing the copy. We should invalidate them afterward.
Also drive-by improve the formatting of a function header.
Differential Revision: https://reviews.llvm.org/D101675
This allocator is not intended for libc++'s users to use;
it's strictly an implementation detail of `src/locale.cpp`.
So, move it to the `src/include/` directory.
Drive-by const-qualify its comparison operators.
For consistency with `__hidden_allocator` (defined in `src/thread.cpp`),
do *not* remove it from "libcxx/lib/libc++unexp.exp",
"libcxx/utils/symcheck-blacklists/linux_blacklist.txt", etc.
Differential Revision: https://reviews.llvm.org/D101293
This reverts commit da456167, which broke the Clang build. I'm able to
reproduce it but I want to give myself a bit more time to investigate.
Differential Revision: https://reviews.llvm.org/D101638
In std::tuple, we should try to avoid calling std::is_copy_constructible
whenever we can to avoid surprising interactions with (I believe) compiler
builtins. This bug was reported in https://reviews.llvm.org/D96523#2730953.
The issue was that when tuple<_Up...> was the same as tuple<_Tp...>, we
would short-circuit the _Or (because sizeof...(_Tp) != 1) and go evaluate
the following `is_constructible<_Tp, const _Up&>...`. That shouldn't
actually be a problem, but see the analysis in https://reviews.llvm.org/D101770#2736470
for why it is with Clang and GCC.
Instead, after this patch, we check whether the constructed-from tuple
is the same as the current tuple regardless of the number of elements,
since we should always prefer the normal copy constructor in that case
anyway.
Differential Revision: https://reviews.llvm.org/D101770
This fixes the issue by implementing _And using the short-circuiting
SFINAE trick that we previously used only in std::tuple. One thing we
could look into is use the naive recursive implementation for disjunctions
with a small number of arguments, and use that trick with larger numbers
of arguments. It might be the case that the constant overhead for setting
up the SFINAE trick makes it only worth doing for larger packs, but that's
left for further work.
This problem was raised in https://reviews.llvm.org/D96523.
Differential Revision: https://reviews.llvm.org/D101661
This patch gets rid of technical debt around std::pointer_safety which,
I claim, is entirely unnecessary. I don't think anybody has used
std::pointer_safety in actual code because we do not implement the
underlying garbage collection support. In fact, P2186 even proposes
removing these facilities entirely from a future C++ version. As such,
I think it's entirely fine to get rid of complex workarounds whose goals
were to avoid breaking the ABI back in 2017.
I'm putting this up both to get reviews and to discuss this proposal for
a breaking change. I think we should be comfortable with making these
tiny breaks if we are confident they won't hurt anyone, which I'm fairly
confident is the case here.
Differential Revision: https://reviews.llvm.org/D100410
This reverts a224bf8ec4 and fixes the
underlying issue.
The underlying issue is simply that MSVC headers contains a define
like "#define __in", where __in is one macro in the MSVC Source
Code Annotation Language, defined in sal.h
Just use a different variable name than "__in"
__indirectly_readable_impl, and add "__in" to nasty_macros.h just
like the existing __out. (Also adding a couple more potentially
conflicting ones.)
Differential Revision: https://reviews.llvm.org/D101613
A span has no idea what container (if any) "owns" its iterators, nor
under what circumstances they might become invalidated.
However, continue to use `__wrap_iter<T*>` instead of raw `T*` outside
of debug mode, because we've been shipping `std::span` since Clang 7
and ldionne doesn't want to break ABI. (Namely, the mangling of functions
taking `span::iterator` as a parameter.) Permit using raw `T*` there,
but only under an ABI macro: `_LIBCPP_ABI_SPAN_POINTER_ITERATORS`.
Differential Revision: https://reviews.llvm.org/D101003
* `std::ranges::range`
* `std::ranges::sentinel_t`
* `std::ranges::range_difference_t`
* `std::ranges::range_value_t`
* `std::ranges::range_reference_t`
* `std::ranges::range_rvalue_reference_t`
* `std::ranges::common_range`
`range_size_t` depends on `sized_range` and will be added alongside it.
Implements parts of:
* P0896R4 The One Ranges Proposal`
Depends on D100255.
Differential Revision: https://reviews.llvm.org/D100269
Arthur O'Dwyer