[committed] libstdc++: Enable doxygen processing for C++20 components

Improve grouping, add @since and @deprecated information. Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * doc/doxygen/user.cfg.in (PREDEFINED): Enable doxygen processing for C++20 components and components that depend on compiler features. * include/bits

[committed] libstdc++: Improve doxygen comments in

Add notes about deprecation and modern replacements. Fix bogus "memory_adaptors" group name. Use markdown for formatting. Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * include/bits/stl_function.h: Improve doxygen comments. Tested powerpc64le-linux. Committed to trunk. commi

[committed] libstdc++: Improve doxygen documentation for std::unique_ptr

Add more detailed documentation for unique_ptr and related components. The new alias templates for the _MakeUniq SFINAE helper make the generated docs look better too. Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * include/bits/unique_ptr.h (default_delete): Add @since tag.

Re: [PATCH v2] libstdc++: improve documentation for bits/stl_function.h [PR51539]

On Wed, 18 Aug 2021 at 13:49, Jonathan Wakely wrote: > > On Tue, 17 Aug 2021 at 21:39, Krzysztof Żelechowski wrote: > > - /// One of the @link memory_adaptors adaptors for member > > "memory_adaptors" here is a bad name (see > which introduced it) but we can just > ch

[committed] libstdc++: Tweak whitespace

Tested powerpc64le-linux. Committed to trunk. commit c8a1cf1a7a8be1dc0de48035d88fecf4954e37ba Author: Jonathan Wakely Date: Wed Aug 18 16:57:47 2021 libstdc++: Tweak whitespace Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * include/bits/stl_tre

[committed] libstdc++: Improve overflow check for file timestamps

The current code assumes that system_clock::duration is nanoseconds, and also performs a value-changing conversion from nanoseconds::max() to double (which doesn't matter after dividing by 1e9, but triggers a warning with Clang nonetheless). A better solution is to use system_clock::duration::max(

[committed] libstdc++: Improve doxygen docs for smart pointers

Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * include/bits/shared_ptr.h: Add @since and @headerfile tags. * include/bits/unique_ptr.h: Add @headerfile tags. Tested powerpc64le-linux. Committed to trunk. commit 30b300de8eb9a53c8ad8d80caf06e386e916bc66 Author: Jonathan

[committed] libstdc++: Document P1739R4 status [PR100139]

We should document the status of this unimplemented feature. Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: PR libstdc++/100139 * doc/xml/manual/status_cxx2020.xml: Add P1739R4 to status table. * doc/html/manual/status.html: Regenerate. Tested powerpc64le-linux.

[committed] libstdc++: Fix move construction of std::tuple with array elements [PR101960]

An array member cannot be direct-initialized in a ctor-initializer-list, so use the base class' move constructor, which does the right thing for both arrays and non-arrays. This constructor could be defaulted, but that would make it trivial for some specializations, which would change the argument

[committed] libstdc++: Don't check always-true condition [PR101965]

Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: PR libstdc++/101965 * include/std/charconv (__to_chars_i): Remove redundant check. Tested powerpc64le-linux. Committed to trunk. commit 85a709595005b5df4b2ee9d81717a5df19c0023f Author: Jonathan Wakely Date: Thu Aug 19 13

[committed] libstdc++: Update Doxygen config template to Doxygen 1.9.2

This adds my new SHOW_HEADERFILE option, and removes some obsolete options. Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * doc/doxygen/user.cfg.in: Update to Doxygen 1.9.2 Tested powerpc64le-linux. Committed to trunk. commit 778044ccf59205e85bc5fdcd1760d789fdd05022 Author: J

Re: [committed] libstdc++: Document P1739R4 status [PR100139]

On 19/08/21 13:03 +0100, Jonathan Wakely wrote: We should document the status of this unimplemented feature. Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: PR libstdc++/100139 * doc/xml/manual/status_cxx2020.xml: Add P1739R4 to status table. * doc/html/manual/s

[committed] libstdc++: Skip filesystem tests that depend on permissions [PR90787]

Tests that depend on filesystem permissions FAIL if run on Windows or as root. Add a helper function to detect those cases, so the tests can skip those checks gracefully. Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: PR libstdc++/90787 * testsuite/27_io/filesystem/itera

Re: [committed] libstdc++: Skip filesystem tests that depend on permissions [PR90787]

On 20/08/21 15:16 +0100, Jonathan Wakely wrote: Tests that depend on filesystem permissions FAIL if run on Windows or as root. Add a helper function to detect those cases, so the tests can skip those checks gracefully. Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: PR libstdc+

[committed] libstdc++: Use __builtin_expect in __dynamic_cast

The null pointer check is never needed for correct code, only to gracefully handle undefined cases. Add __builtin_expect to be sure that we don't pessimize the valid uses. libstdc++-v3/ChangeLog: * libsupc++/dyncast.cc (__dynamic_cast): Add __builtin_expect to precondition check.

[committed] libstdc++: Add default template argument to basic_istream_view

The standard shows this default template argument in the synopsis, but it was missing in libstdc++. libstdc++-v3/ChangeLog: * include/std/ranges (basic_istream_view): Add default template argument. * testsuite/std/ranges/istream_view.cc: Check it. Tested x86_64-linux. Co

[committed] libstdc++: Fix mismatched class-key tags

Clang warns about this, but GCC doesn't (see PR c++/102036). Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * src/c++11/cxx11-shim_facets.cc: Fix mismatched class-key in explicit instantiation definitions. Tested powerpc64le-linux. Committed to trunk. commit d8b7282ea2

[committed] libstdc++: Add std::is_layout_compatible trait for C++20

Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * include/std/type_traits (is_layout_compatible): Define. (is_corresponding_member): Define. * include/std/version (__cpp_lib_is_layout_compatible): Define. * testsuite/20_util/is_layout_compatible/is_correspo

Re: [committed] libstdc++: Add std::is_layout_compatible trait for C++20

On 24/08/21 16:13 +0100, Jonathan Wakely wrote: Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * include/std/type_traits (is_layout_compatible): Define. (is_corresponding_member): Define. * include/std/version (__cpp_lib_is_layout_compatible): Define. *

Re: [PATCH] c++: Fix unnecessary error when top-level cv-qualifiers is dropped [PR101783]

>PR c++/101387 > >gcc/cp/ChangeLog: >PR c++/101387 >* tree.c (cp_build_qualified_type_real): Excluding typedef from error > >gcc/testsuite/ChangeLog: >PR c++/101387 >* g++.dg/parse/pr101783.C: New test. This is the wrong PR number. How has this ptch been tested? Ha

[committed] wwwdocs: Fix grammar in gcc-11 release notes

Committed as obvious. commit 6404392bcf74d2af7d171cc1df9b5c001d2218f8 Author: Jonathan Wakely Date: Tue Aug 24 18:06:25 2021 +0100 Fix grammar in gcc-11 release notes diff --git a/htdocs/gcc-11/changes.html b/htdocs/gcc-11/changes.html index b8bb2e69..6dec8856 100644 --- a/htdocs/gcc-11/c

[committed] libstdc++: Remove __gnu_cxx::rope::erase(size_type) [PR102048]

This function claims to remove a single character at index p, but it actually removes p+1 characters beginning at p. So r.erase(0) removes the first character, but r.erase(1) removes the second and third, and r.erase(2) removes the second, third and fourth. This is not a useful API. The overload i

[committed] libstdc++: Fix conditions for optimizing uninitialized algos [PR102064]

While laying some groundwork for constexpr std::vector, I noticed some bugs in the std::uninitialized_xxx algorithms. The conditions being checked for optimizing trivial cases were not quite right, as shown in the examples in the PR. This consolidates the checks into a single macro. The macro has

[committed] libstdc++: Fix non-reserved names in

Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * include/std/valarray: Uglify 'func' parameters. * testsuite/17_intro/names.cc: Add 'func' to checks. Tested powerpc64le-linux. Committed to trunk. commit 0163bbaaef119ef9e98c4b3dcba159609f77c818 Author: Jonathan Wakely D

[committed] libstdc++: Fix names.cc test failures on Windows

The Windows CRT headers define structs with members called f, x, y etc so don't check those. There are also lots of unnecessary function parameters in mingw headers using non-reserved names, e.g. uses p and z as parameters of mingw_gettimeofday uses j as a parameter of imaxabs uses l, o and fun

[committed] libstdc++: Add another non-reserved name to tests

Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * testsuite/17_intro/names.cc: Check 'sz'. Tested x86_64-linux. Committed to trunk. commit ea5674687ac45fe7242c57220b699337899881f0 Author: Jonathan Wakely Date: Wed Aug 25 23:19:25 2021 libstdc++: Add another non-reserved

[committed] libstdc++: Make Networking TS headers more portable [PR100285]

Add more preprocessor conditions to check for constants being defined before using them, so that the Networking TS headers can be compiled on a wider range of platforms. Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: PR libstdc++/100285 * configure.ac: Check for O_NONBLO

[committed] libstdc++: Add static assertions for std::function requirements

Add static assertions to std::function, so that more user-friendly diagnostics are given when trying to store a non-copyable target object. These preconditions were added as "Mandates:" by LWG 2447, but I'm committing them separately from implementing that, to allow just this change to be backport

[committed] libstdc:: Use markdown for Doxygen comments in std::function

Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * include/bits/std_function.h (function): Adjust doxygen comments. * include/bits/unique_ptr.h (make_unique_for_overwrite): Change parameter name to match doxygen comment. Tested powerpc64le-linux. Committed

[committed] libstdc++: Avoid a move in std::function construction (LWG 2447)

This makes the std::function constructor use perfect forwarding, to avoid an unnecessary move-construction of the target. This means we need to rewrite the _Function_base::_Base_manager::_M_init_functor function to use a forwarding reference, and so can reuse it for the clone operation. Also simpl

Re: [PATCH] Fix inline versioned namespace bootstrap

On Fri, 27 Aug 2021 at 21:58, François Dumont via Libstdc++ wrote: > > Since std::allocator is not specialized anymore in > _GLIBCXX_INLINE_VERSION mode _ExtPtr_allocator specialization do > not compile > > because std::allocator is incomplete. That doesn't look right ... it should be complete. T

Re: [PATCH] Fix inline versioned namespace bootstrap

On Fri, 27 Aug 2021 at 22:17, Jonathan Wakely wrote: > > On Fri, 27 Aug 2021 at 21:58, François Dumont via Libstdc++ > wrote: > > > > Since std::allocator is not specialized anymore in > > _GLIBCXX_INLINE_VERSION mode _ExtPtr_allocator specialization do > > not compile > > > > because std::alloca

Re: [PATCH] Fix inline versioned namespace bootstrap

On Sat, 28 Aug 2021 at 10:26, Jonathan Wakely wrote: > > On Fri, 27 Aug 2021 at 22:17, Jonathan Wakely wrote: > > > > On Fri, 27 Aug 2021 at 21:58, François Dumont via Libstdc++ > > wrote: > > > > > > Since std::allocator is not specialized anymore in > > > _GLIBCXX_INLINE_VERSION mode _ExtPtr_a

Re: [committed] libstdc++: Avoid a move in std::function construction (LWG 2447)

On 27/08/21 00:13 +0100, Jonathan Wakely wrote: This makes the std::function constructor use perfect forwarding, to avoid an unnecessary move-construction of the target. This means we need to rewrite the _Function_base::_Base_manager::_M_init_functor function to use a forwarding reference, and so

[committed] libstdc++: Fix inefficiency in filesystem::absolute [PR99876]

When the path is already absolute, the call to current_path() is wasteful, because operator/ will ignore the left operand anyway. Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: PR libstdc++/99876 * src/c++17/fs_ops.cc (fs::absolute): Call non-throwing form, to av

[committed] libstdc++: Fix std::allocator for versioned namespace

Removing the allocator specialization for the versioned namespace breaks _Extptr_allocator because the allocator specialization was still declared in , making it an incomplete type. It wrong to remove that specialization anyway, because it is still needed pre-C++20. This removes the #if ! _GLIBCX

[PATCH] c++: Fix docs on assignment of virtual bases [PR60318]

The description of behaviour is incorrect, the virtual base gets assigned before entering the bodies of A::operator= and B::operator=, not after. The example is also ill-formed (passing a string literal to char*) and undefined (missing return from Base::operator=). Signed-off-by: Jonathan Wakely

Re: [PATCH] libstdc++-v3: Check for TLS support on mingw

It looks like my questions about this patch never got an answer, and it never got applied. Could somebody say whether TLS is enabled for native *-*-mingw* builds? If it is, then we definitely need to add GCC_CHECK_TLS to the cross-compiler config too. For a linux-hosted x86_64-w64-mingw32 cross c

[committed] libstdc++: Fix 17_intro/names.cc failures on Solaris

Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * testsuite/17_intro/names.cc: Undefine some more names used by Solaris system headers. Tested x86_64-linux and sparc-solaris2.11. Committed to trunk. commit 69b09c5599b201ac039db564c303f7b20d87e0df Author: Jonathan Wakely

[committed] libstdc++: Fix ip::tcp::resolver test failure on Solaris

Solaris 11 does not have "http" in /etc/services, which causes this test to fail. Try some other services until we find one that works. Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * testsuite/experimental/net/internet/resolver/ops/lookup.cc: Try other service if "http

[committed] libstdc++: Improve error handling in Net TS name resolution

Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: * include/experimental/internet (__make_resolver_error_code): Handle EAI_SYSTEM errors. (basic_resolver_results): Use __make_resolver_error_code. Use Glibc NI_MAXHOST and NI_MAXSERV values for buffer sizes. T

[committed] libstdc++: Add missing return for atomic timed wait [PR102074]

This adds a missing return statement to the non-futex wait-until operation. Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: PR libstdc++/102074 * include/bits/atomic_timed_wait.h (__timed_waiter_pool) [!_GLIBCXX_HAVE_PLATFORM_TIMED_WAIT]: Add missing return. Test

[committed] libstdc++: Remove redundant noexcept-specifier on definitions

These destructors are noexcept anyway. I removed the redundant noexcept from the error_category destructor's declaration in r0-123475, but didn't remove it from the defaulted definition in system_error.cc. That causes warnings if the library is built with Clang. This removes the redundant noexcept

[committed] libstdc++: Fix broken autoconf check for O_NONBLOCK

On 26/08/21 12:46 +0100, Jonathan Wakely wrote: PR libstdc++/100285 * configure.ac: Check for O_NONBLOCK. This check was broken, oops. Fixed like so. Tested x86_64-linux. Committed to trunk. commit 1cacdef0d1a3f587691735d1822d584b68eba593 Author: Jonathan Wakely Date: Tue

[committed] libstdc++: Add valid range checks to std::span constructors [PR98421]

Signed-off-by: Jonathan Wakely libstdc++-v3/ChangeLog: PR libstdc++/98421 * include/std/span (span(Iter, size_type), span(Iter, Iter)): Add valid range checks. * testsuite/23_containers/span/cons_1_assert_neg.cc: New test. * testsuite/23_containers/span/co

[committed] libstdc++: Fix noexcept-specifier for std::bind_front [PR 97101]

libstdc++-v3/ChangeLog: PR libstdc++/97101 * include/std/functional (bind_front): Fix order of parameters in is_nothrow_constructible_v specialization. * testsuite/20_util/function_objects/bind_front/97101.cc: New test. Tested powerpc64le-linux. Committed to trunk.

[committed] libstdc++: Make std::assume_aligned a constexpr function [PR 97132]

The cast from void* to T* in std::assume_aligned is not valid in a constexpr function. The optimization hint is redundant during constant evaluation anyway (the compiler can see the object and knows its alignment). Simply return the original pointer without applying the __builtin_assume_aligned hin

[committed] libstdc++: Relax constraints on transform_view and elements_view iterators

libstdc++-v3/ChangeLog: * include/std/ranges (transform_view, elements_view): Relax constraints on operator- for iterators, as per LWG 3483. * testsuite/std/ranges/adaptors/elements.cc: Check that we can take the difference of two iterators from a non-random

Re: [PATCH] libstdc++: Rebase include/pstl to current upstream

On 15/09/20 20:35 -0700, Thomas Rodgers wrote: From: Thomas Rodgers From llvm-project/pstl @ 0b2e0e80d96 libstdc++-v3/ChangeLog: * include/pstl/algorithm_impl.h: Update file. * include/pstl/execution_impl.h: Likewise. * include/pstl/glue_algorithm_impl.h: Likewise.

Re: [PATCH] Fix overflow handling in std::align

On 21/09/20 10:42 -0400, Glen Fernandes via Libstdc++ wrote: On Mon, Sep 14, 2020 at 5:44 PM Thomas Rodgers wrote: > On Sep 14, 2020, at 7:30 AM, Ville Voutilainen wrote: > > On Mon, 14 Sep 2020 at 15:49, Glen Fernandes wrote: >> Sounds like a good idea. Updated patch attached. > > Looks good

Re: [PATCH] libstdc++: Mark some more algorithms constexpr for C++20

On 18/09/20 21:08 -0400, Patrick Palka via Libstdc++ wrote: As per P0202. Tested on x86_64-pc-linux-gnu. libstdc++-v3/ChangeLog: * include/bits/stl_algo.h (for_each_n): Mark constexpr for C++20. (search): Likewise for the overload that takes a searcher. * testsuite/25_a

Re: [PATCH] libstdc++: Fix division by zero in std::sample

On 18/09/20 21:08 -0400, Patrick Palka via Libstdc++ wrote: This fixes a division by zero in the selection-sampling std::__search overload when the input range is empty (and hence __unsampled_sz is 0). Tested on x86_64-pc-linux-gnu. libstdc++-v3/ChangeLog: * include/bits/stl_algo.h (__

Re: [PATCH] libstdc++: Rebase include/pstl to current upstream

On 21/09/20 08:19 -0700, Thomas Rodgers wrote: On Sep 21, 2020, at 7:40 AM, Jonathan Wakely wrote: On 15/09/20 20:35 -0700, Thomas Rodgers wrote: From: Thomas Rodgers From llvm-project/pstl @ 0b2e0e80d96 libstdc++-v3/ChangeLog: * include/pstl/algorithm_impl.h: Update file.

Re: [PATCH] libstdc++: Remove overzealous static_asserts from std::span

On 21/09/20 15:07 -0400, Patrick Palka via Libstdc++ wrote: On Mon, 21 Sep 2020, Patrick Palka wrote: For a span with empty static extent, we currently model the preconditions of front(), back(), and operator[] as if they were mandates, by using a static_assert to verify that extent != 0. This

[committed] libstdc++: Fix constraints for drop_view::begin() const [LWG 3482]

libstdc++-v3/ChangeLog: * include/std/ranges (drop_view::begin()): Adjust constraints to match the correct condition for O(1) ranges::next (LWG 3482). * testsuite/std/ranges/adaptors/drop.cc: Check that iterator is cached for non-sized_range. Tested powerpc64le-lin

[committed] libstdc++: Use __builtin_expect in __glibcxx_assert

libstdc++-v3/ChangeLog: * include/bits/c++config (__replacement_assert): Add noreturn attribute. (__glibcxx_assert_impl): Use __builtin_expect to hint that the assertion is expected to pass. Tested powerpc64le-linux. Committed to trunk. commit 7db5967f1050eb2b45e9

Re: [committed] libstdc++: Use correct argument type for __use_alloc [PR 96803]

On 26/08/20 19:34 +0100, Jonathan Wakely wrote: The _Tuple_impl constructor for allocator-extended construction from a different tuple type uses the _Tuple_impl's own _Head type in the __use_alloc test. That is incorrect, because the argument tuple could have a different type. Using the wrong typ

Re: [PATCH] libstdc++: use a link test to test for -Wl,-z,relro

On 16/09/20 12:11 +, JonY via Libstdc++ wrote: On 9/13/20 3:37 PM, JonY wrote: On 9/10/20 2:23 PM, JonY wrote: Do a link test instead of just a grep. The linker can support multiple targets, but not all targets can use it. Cygwin/MinGW ld can support ELF but the PE format for Windows itsel

Re: [PATCH] libstdc++: use a link test to test for -Wl,-z,relro

On 22/09/20 09:40 +, JonY via Libstdc++ wrote: On 9/22/20 8:50 AM, Jonathan Wakely wrote: I don't see a patch, or any previous email to the libstdc++ list. Please resend with the patch, CCing libstdc++@ Thanks. Resent for the record. Thanks. I've been told it might not be appropr

Re: [PATH 3/3] libstdc++: Add std::advance ostreambuf_iterator overload

On 14/09/20 22:36 +0200, François Dumont via Libstdc++ wrote: On 10/09/20 5:19 pm, Jonathan Wakely wrote: On 09/09/20 22:12 +0200, François Dumont via Libstdc++ wrote: libstdc++: Add std::advance overload for ostreambuf_iterator Implement std::advance overload for ostreambuf_iterator using

Re: [PATCH] libstdc++: Pretty printers for std::_Bit_reference, std::_Bit_iterator and std::_Bit_const_iterator

On 14/09/20 16:49 +0200, Michael Weghorn via Libstdc++ wrote: Hi, the attached patch implements pretty printers relevant for iteration over std::vector, thus handling the TODO added in commit 36d0dada6773d7fd7c5ace64c90e723930a3b81e ("Have std::vector printer's iterator return bool for vector",

[committed] libstdc++: Introduce new headers for C++20 ranges components

This introduces two new headers: defines the minimal components needed for using C++20 ranges (customization point objects such as std::ranges::begin, concepts such as std::ranges::range, etc.) includes and additionally defines subrange, which is needed by . Most of the content of was previo

Re: [PATCH] Fix overflow handling in std::align

On 21/09/20 15:50 +0100, Jonathan Wakely wrote: On 21/09/20 10:42 -0400, Glen Fernandes via Libstdc++ wrote: On Mon, Sep 14, 2020 at 5:44 PM Thomas Rodgers wrote: On Sep 14, 2020, at 7:30 AM, Ville Voutilainen wrote: On Mon, 14 Sep 2020 at 15:49, Glen Fernandes wrote: Sounds like a good id

[committed] libstdc++: Fix out-of-bounds string_view access in filesystem::path [PR 97167]

libstdc++-v3/ChangeLog: PR libstdc++/97167 * src/c++17/fs_path.cc (path::_Parser::root_path()): Check for empty string before inspecting the first character. * testsuite/27_io/filesystem/path/append/source.cc: Append empty string_view to path. Tested powerp

Re: [PATCH] PR libstdc++/71579 assert that type traits are not misused with an incomplete type

On 24/09/20 10:15 +0300, Antony Polukhin via Libstdc++ wrote: Looks like the last patch was not applied. Do I have to change something in it? No, it just hasn't been reviewed yet.

Re: [PATCH] add move CTOR to auto_vec, use auto_vec for get_loop_exit_edges

On 24/09/20 11:11 +0200, Richard Biener wrote: On Wed, 26 Aug 2020, Richard Biener wrote: On Thu, 6 Aug 2020, Richard Biener wrote: > On Thu, 6 Aug 2020, Richard Biener wrote: > > > This adds a move CTOR to auto_vec and makes use of a > > auto_vec return value for get_loop_exit_edges denoting

Re: [PATCH] libstdc++: Specialize ranges::__detail::__box for semiregular types

On 24/09/20 09:04 -0400, Patrick Palka via Libstdc++ wrote: The class template semiregular-box defined in [range.semi.wrap] is used by a number of views to accomodate non-semiregular subobjects while ensuring that the overall view remains semiregular. It provides a stand-in default constructor,

[committed] libstdc++: Fix misnamed configure option in manual

libstdc++-v3/ChangeLog: * doc/xml/manual/configure.xml: Correct name of option. * doc/html/*: Regenerate. Committed to trunk. commit 61f7995398a719f2ff91d07e8f8ed6d4413db697 Author: Jonathan Wakely Date: Thu Sep 24 17:33:16 2020 libstdc++: Fix misnamed configure option in

Re: [PATCH] PR libstdc++/71579 assert that type traits are not misused with an incomplete type

On 20/08/20 18:31 +0300, Antony Polukhin via Libstdc++ wrote: ср, 19 авг. 2020 г. в 14:29, Jonathan Wakely : <...> Do we also want to check (std::__is_complete_or_unbounded(__type_identity<_ArgTypes>{}) && ...) for invoke_result and the is_invocable traits? Done. Changelog: 2020-08-20 Anton

[committed] libstdc++: Remove redundant -std=gnu++1z flags from makefile

Now that G++ defaults to gnu++17 we don't need special rules for compiling the C++17 allocation and deallocation functions. libstdc++-v3/ChangeLog: * libsupc++/Makefile.am: Remove redundant -std=gnu++1z flags. * libsupc++/Makefile.in: Regenerate. Tested powerpc64le-linux. Committ

[committed] libstdc++: Use __libc_single_threaded to optimise atomics [PR 96817]

Glibc 2.32 adds a global variable that says whether the process is single-threaded. We can use this to decide whether to elide atomic operations, as a more precise and reliable indicator than __gthread_active_p. This means that guard variables for statics and reference counting in shared_ptr can u

Re: [PATCH 1/4] libstdc++: Reduce the size of an unbounded iota_view

On 28/09/20 00:48 -0400, Patrick Palka via Libstdc++ wrote: libstdc++-v3/ChangeLog: * include/std/ranges (iota_view::_M_bound): Give it [[no_unique_address]]. * testsuite/std/ranges/iota/iota_view.cc: Check that an unbounded iota_view has minimal size. OK. lib

Re: [PATCH 2/4] libstdc++: Reduce the size of a subrange with empty sentinel type

On 28/09/20 00:48 -0400, Patrick Palka via Libstdc++ wrote: libstdc++-v3/ChangeLog: * include/bits/ranges_util.h (subrange::_M_end): Give it [[no_unique_adcress]]. * testsuite/std/ranges/subrange/sizeof.cc: New test. OK. libstdc++-v3/include/bits/ranges_util.h |

Re: [PATCH 3/4] libstdc++: Add test that tracks range adaptors' sizes

On 28/09/20 00:48 -0400, Patrick Palka via Libstdc++ wrote: libstdc++-v3/ChangeLog: * testsuite/std/ranges/adaptors/sizeof.cc: New test. OK. .../testsuite/std/ranges/adaptors/sizeof.cc | 49 +++ 1 file changed, 49 insertions(+) create mode 100644 libstdc++-v3/testsui

Re: [PATCH 4/4] libstdc++: Rearrange some range adaptors' data members

On 28/09/20 00:48 -0400, Patrick Palka via Libstdc++ wrote: Since the standard range adaptors are specified to derive from the empty class view_base, making their first data member store the underlying view is suboptimal, for if the underlying view also derives from view_base then the two view_ba

Re: [PATCH] libstdc++: Add C++2a synchronization support

On 11/09/20 16:58 -0700, Thomas Rodgers wrote: From: Thomas Rodgers This patch supercedes both the Add C++2a synchronization support patch being replied to *and* the patch adding wait/notify_* to atomic_flag. Add support for - * atomic_flag::wait/notify_one/notify_all * atomic::wait/notify_o

Re: [PATCH] libstdc++: Add C++2a synchronization support

On 11/09/20 16:58 -0700, Thomas Rodgers wrote: From: Thomas Rodgers This patch supercedes both the Add C++2a synchronization support patch being replied to *and* the patch adding wait/notify_* to atomic_flag. Add support for - * atomic_flag::wait/notify_one/notify_all * atomic::wait/notify_o

Re: [PATCH] libstdc++: Add C++2a synchronization support

On 11/09/20 16:58 -0700, Thomas Rodgers wrote: From: Thomas Rodgers This patch supercedes both the Add C++2a synchronization support patch being replied to *and* the patch adding wait/notify_* to atomic_flag. Add support for - * atomic_flag::wait/notify_one/notify_all * atomic::wait/notify_o

Re: [PATCH 4/4] libstdc++: Rearrange some range adaptors' data members

On 28/09/20 09:11 -0400, Patrick Palka via Libstdc++ wrote: On Mon, 28 Sep 2020, Jonathan Wakely wrote: On 28/09/20 00:48 -0400, Patrick Palka via Libstdc++ wrote: > Since the standard range adaptors are specified to derive from the empty > class view_base, making their first data member store

Re: [PATCH] libstdc++: Add C++2a synchronization support

On 28/09/20 14:29 -0700, Thomas Rodgers wrote: +template + __atomic_wait_status + __platform_wait_until_impl(__platform_wait_t* __addr, +__platform_wait_t __val, +const chrono::time_point<__platform_wait_clock_t, +

Re: [PATCH] c++: Diagnose visitors with different return types for std::visit [PR95904]

On 29/09/20 01:12 +0300, Ville Voutilainen via Libstdc++ wrote: Not completely tested yet. This does fix the problem of converting incompatible pointer-to-function types, and thus gets rid of the suggestion that compiling the code with -fpermissive is a possibility. There is a special-casing for

Re: [committed] libstdc++: Use __libc_single_threaded to optimise atomics [PR 96817]

On 29/09/20 13:51 +0200, Christophe Lyon via Libstdc++ wrote: On Sat, 26 Sep 2020 at 21:42, Jonathan Wakely via Gcc-patches wrote: Glibc 2.32 adds a global variable that says whether the process is single-threaded. We can use this to decide whether to elide atomic operations, as a more

[committed] libstdc++: Use __is_same instead of __is_same_as

PR 92271 added __is_same as another spelling of __is_same_as. Since Clang also spells it __is_same, let's just use that consistently. It appears that Intel icc sets __GNUC__ to 10, but only supports __is_same_as. If we only use __is_same for __GNUC__ >= 11 then we won't break icc again (it looks l

Re: [PATCH] libstdc++: Rebase include/pstl to current upstream

On 21/09/20 15:40 +0100, Jonathan Wakely wrote: On 15/09/20 20:35 -0700, Thomas Rodgers wrote: From: Thomas Rodgers From llvm-project/pstl @ 0b2e0e80d96 libstdc++-v3/ChangeLog: * include/pstl/algorithm_impl.h: Update file. * include/pstl/execution_impl.h: Likewise. *

Re: [committed] libstdc++: Use __libc_single_threaded to optimise atomics [PR 96817]

On 30/09/20 16:03 +0100, Jonathan Wakely wrote: On 29/09/20 13:51 +0200, Christophe Lyon via Libstdc++ wrote: On Sat, 26 Sep 2020 at 21:42, Jonathan Wakely via Gcc-patches wrote: Glibc 2.32 adds a global variable that says whether the process is single-threaded. We can use this to decide

Re: [committed] libstdc++: Use __libc_single_threaded to optimise atomics [PR 96817]

On 01/10/20 09:30 +0200, Christophe Lyon via Libstdc++ wrote: On Wed, 30 Sep 2020 at 22:44, Jonathan Wakely wrote: On 30/09/20 16:03 +0100, Jonathan Wakely wrote: >On 29/09/20 13:51 +0200, Christophe Lyon via Libstdc++ wrote: >>On Sat, 26 Sep 2020 at 21:42, Jonathan Wakely via Gc

Re: [committed] libstdc++: Use __libc_single_threaded to optimise atomics [PR 96817]

2020 at 21:42, Jonathan Wakely via Gcc-patches wrote: Glibc 2.32 adds a global variable that says whether the process is single-threaded. We can use this to decide whether to elide atomic operations, as a more precise and reliable indicator than __gthread_active_p. This means that guard variables

Re: [PATCH] libstdc++: Add missing P0896 changes to

On 01/10/20 10:35 -0400, Patrick Palka via Libstdc++ wrote: I noticed that the following changes from this paper were not yet implemented. Oops, thanks. OK to commit after testing on x86_64-pc-linux-gnu finishes successfully? libstdc++-v3/ChangeLog: * include/bits/stl_iterator.h (re

[PATCH] testsuite: Fix FAIL for older ARM cores

Since hard-float is not implemented for cores that only support thumb1 (and not thumb2) this test fails for configurations using hard float but older -mcpu settings. gcc/testsuite/ChangeLog: * g++.dg/inherit/thunk10.C: Skip test for arm_hf_eabi if -mthumb doesn't generate thumb2 i

Re: [PATCH 1/2] system_data_types.7: Add 'void *'

On Fri, 2 Oct 2020 at 13:17, Alejandro Colomar wrote: > > Signed-off-by: Alejandro Colomar > > system_data_types.7: void *: Add info about generic function parameters and > return value > > Reported-by: Paul Eggert > Reported-by: David Laight > Signed-off-by: Alejandro Colomar > > system_data

Re: [committed] libstdc++: Use __libc_single_threaded to optimise atomics [PR 96817]

On 26/09/20 20:42 +0100, Jonathan Wakely wrote: Glibc 2.32 adds a global variable that says whether the process is single-threaded. We can use this to decide whether to elide atomic operations, as a more precise and reliable indicator than __gthread_active_p. This means that guard variables for

[committed] libstdc++: Change test to work without 64-bit atomics

This fixes a linker error for older ARM cores without 64-bit atomics. I think the { dg-add-options libatomic } is no longer needed, but it's harmless to keep it there. libstdc++-v3/ChangeLog: * testsuite/29_atomics/atomic_float/value_init.cc: Use float instead of double so that _

Re: This is my patch for fstream to fix the performance issue on Windows.

On 01/10/20 03:29 +, sotrdg sotrdg via Libstdc++ wrote: From fb8d644a4c315058af141a3e84fcc083d665c8b9 Mon Sep 17 00:00:00 2001 From: ejsvifq_mabmip Date: Wed, 30 Sep 2020 23:26:47 -0400 Subject: [PATCH] Fix a long term performance issue of fstream on Windows since MSVCRT defines BUFSIZ as 51

Re: [PATCH] libstdc++: Diagnose visitors with different return types [PR95904]

On 29/09/20 19:35 +0300, Ville Voutilainen via Libstdc++ wrote: On Tue, 29 Sep 2020 at 14:20, Jonathan Wakely wrote: I think this is what we want: template constexpr inline __same_types = (is_same_v<_Tp, _Types> && ...); is_same_v is very cheap, it uses the built-in directly, so you d

Re: libstdc++: Fix chrono::__detail::ceil to work with C++11 (was Re: [PATCH v5 6/8] libstdc++ atomic_futex: Avoid rounding errors in std::future::wait_* [PR91486])

On 19/09/20 11:37 +0100, Mike Crowe wrote: On Friday 11 September 2020 at 19:59:36 +0100, Jonathan Wakely wrote: commit 53ad6b1979f4bd7121e977c4a44151b14d8a0147 Author: Jonathan Wakely Date: Fri Sep 11 19:59:11 2020 libstdc++: Fix chrono::__detail::ceil to work with C++11 In C++11 c

Re: [PATCH v5 6/8] libstdc++ atomic_futex: Avoid rounding errors in std::future::wait_* [PR91486]

On 19/09/20 11:50 +0100, Mike Crowe wrote: On 29/05/20 07:17 +0100, Mike Crowe via Libstdc++ wrote: > > diff --git a/libstdc++-v3/include/bits/atomic_futex.h b/libstdc++-v3/include/bits/atomic_futex.h > > index 5f95ade..aa137a7 100644 > > --- a/libstdc++-v3/include/bits/atomic_futex.h > > +++ b

[committed] libstdc++: Make allocators throw bad_array_new_length on overflow [LWG 3190]

std::allocator and std::pmr::polymorphic_allocator should throw std::bad_array_new_length from their allocate member functions if the number of bytes required cannot be represented in std::size_t. libstdc++-v3/ChangeLog: * config/abi/pre/gnu.ver: Add new symbol. * include/bits/fun

[committed] libstdc++: Minor header cleanup in

When adding new features to I included the required headers adjacent to the new code. This cleans it up by moving all the includes to the start of the file. libstdc++-v3/ChangeLog: * include/std/numeric: Move all #include directives to the top of the header. * testsuite/2

[committed] libstdc++: Reduce uses of std::numeric_limits

This avoids unnecessary instantiations of std::numeric_limits or inclusion of when a more lightweight alternative would work. Some uses can be replaced with __gnu_cxx::__int_traits and some can just use size_t(-1) directly where SIZE_MAX is needed. libstdc++-v3/ChangeLog: * include/bits/

Re: [PATCH, libstdc++] Improve the performance of std::uniform_int_distribution (fewer divisions)

I'm sorry it's taken a year to review this properly. Comments below ... On 27/09/19 14:18 -0400, Daniel Lemire wrote: (This is a revised patch proposal. I am revising both the description and the code itself.) Even on recent processors, integer division is relatively expensive. The current impl

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