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With the upcoming introduction of iterator concepts in ranges,
the meaning of "__is_contiguous_iterator" changes drastically.
Currently we intend it to mean "does it have this iterator category",
but it could now also mean "does it meet the requirements of this
concept", and these can be different.
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Summary:
This avoids symbols being accidentally exported from the dylib when they
shouldn't. The next step is to use a pragma to apply hidden visibility
to all declarations (unless otherwise specified), which will allow us
to drop the per-declaration hidden visibility attributes we currently
have.
This also has the nice side effect of making sure the dylib exports the
same symbols regardless of the optimization level.
PR38138
Reviewers: EricWF, mclow.lists
Subscribers: mgorny, christof, jkorous, dexonsmith, libcxx-commits
Tags: #libc
Differential Revision: https://reviews.llvm.org/D62868
llvm-svn: 368703
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Summary:
Also add the corresponding XFAILs to tests that require filesystem.
The approach taken to mark <filesystem> as unavailable in this patch
is to mark all the header as unavailable using #pragma clang attribute.
Marking each declaration using the attribute is more intrusive and
does not provide a lot of value right now because pretty much everything
in <filesystem> requires dylib support, often transitively.
This is an alternative to https://reviews.llvm.org/D59093.
A similar (but partial) patch was already applied in r356558.
Reviewers: mclow.lists, EricWF, serge-sans-paille
Subscribers: christof, jkorous, dexonsmith, libcxx-commits
Differential Revision: https://reviews.llvm.org/D59224
llvm-svn: 356616
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Summary:
Otherwise, implicit instantiations of templates with these types can
cause the dylib to start exporting the vtable/RTTI of the instantiation.
Giving hidden visibility to those types causes the compiler to understand
that they are not used outside the dylib, and as a result implicitly
instantiated vtables/RTTI of templates with those internal types will
get hidden visibility.
Reviewers: EricWF
Subscribers: christof, jkorous, dexonsmith, jdoerfert, libcxx-commits
Differential Revision: https://reviews.llvm.org/D59550
llvm-svn: 356488
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llvm-svn: 353180
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_LIBCPP_FUNC_VIS is redundant since the class is already annotated with
_LIBCPP_EXCEPTION_ABI.
Fixes this build error:
In file included from fstream:188:
filesystem(1350,3): error: attribute 'dllimport' cannot be applied to member of 'dllimport' class
_LIBCPP_FUNC_VIS
__config(674,37): note: expanded from macro '_LIBCPP_FUNC_VIS'
#define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS
__config(666,38): note: expanded from macro '_LIBCPP_DLL_VIS'
# define _LIBCPP_DLL_VIS __declspec(dllimport)
filesystem(1313,7): note: previous attribute is here
class _LIBCPP_EXCEPTION_ABI filesystem_error : public system_error {
__config(675,37): note: expanded from macro '_LIBCPP_EXCEPTION_ABI'
#define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS
__config(666,38): note: expanded from macro '_LIBCPP_DLL_VIS'
# define _LIBCPP_DLL_VIS __declspec(dllimport)
Differential Revision: https://reviews.llvm.org/D57354
llvm-svn: 352525
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to reflect the new license. These used slightly different spellings that
defeated my regular expressions.
We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.
Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.
llvm-svn: 351648
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This prevents things like:
using namespace std::filesystem;
auto x = L"a/b" == std::string("a/b");
llvm-svn: 349884
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This patch adds std::chrono::file_clock, but without breaking the
existing ABI for std::filesystem.
llvm-svn: 349883
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This patch disables shift-sign-overflow warnings for now. It also
fixes most -Wfloat-equal warnings and -Wextra-semi warnings.
llvm-svn: 343438
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feature test macros, though. Reviewed as: https://reviews.llvm.org/D51955
llvm-svn: 342073
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This patch implements the <filesystem> header and uses that
to provide <experimental/filesystem>.
Unlike other standard headers, the symbols needed for <filesystem>
have not yet been placed in libc++.so. Instead they live in the
new libc++fs.a library. Users of filesystem are required to link this
library. (Also note that libc++experimental no longer contains the
definition of <experimental/filesystem>, which now requires linking libc++fs).
The reason for keeping <filesystem> out of the dylib for now is that
it's still somewhat experimental, and the possibility of requiring an
ABI breaking change is very real. In the future the symbols will likely
be moved into the dylib, or the dylib will be made to link libc++fs automagically).
Note that moving the symbols out of libc++experimental may break user builds
until they update to -lc++fs. This should be OK, because the experimental
library provides no stability guarantees. However, I plan on looking into
ways we can force libc++experimental to automagically link libc++fs.
In order to use a single implementation and set of tests for <filesystem>, it
has been placed in a special `__fs` namespace. This namespace is inline in
C++17 onward, but not before that. As such implementation is available
in C++11 onward, but no filesystem namespace is present "directly", and
as such name conflicts shouldn't occur in C++11 or C++14.
llvm-svn: 338093
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