+2024-02-01 Patrick Palka <ppalka@redhat.com>
+
+ PR libstdc++/113309
+ PR libstdc++/109203
+ * include/bits/ranges_util.h (__detail::__pair_like): Don't
+ define in C++23 mode.
+ (__detail::__pair_like_convertible_from): Adjust as per P2165R4.
+ (__detail::__is_subrange<subrange>): Moved from <ranges>.
+ (__detail::__is_tuple_like_v<subrange>): Likewise.
+ * include/bits/stl_iterator.h: Include <bits/utility.h> for
+ C++23.
+ (__different_from): Move to <concepts>.
+ (__iter_key_t): Adjust for C++23 as per P2165R4.
+ (__iter_val_t): Likewise.
+ * include/bits/stl_pair.h (pair, array): Forward declare.
+ (get): Forward declare all overloads relevant to P2165R4
+ tuple-like constructors.
+ (__is_tuple_v): Define for C++23.
+ (__is_tuple_like_v): Define for C++23.
+ (__tuple_like): Define for C++23 as per P2165R4.
+ (__pair_like): Define for C++23 as per P2165R4.
+ (__eligibile_tuple_like): Define for C++23.
+ (__eligibile_pair_like): Define for C++23.
+ (pair::_S_constructible_from_pair_like): Define for C++23.
+ (pair::_S_convertible_from_pair_like): Define for C++23.
+ (pair::_S_dangles_from_pair_like): Define for C++23.
+ (pair::pair): Define overloads taking a tuple-like type for
+ C++23 as per P2165R4.
+ (pair::_S_assignable_from_tuple_like): Define for C++23.
+ (pair::_S_const_assignable_from_tuple_like): Define for C++23.
+ (pair::operator=): Define overloads taking a tuple-like type for
+ C++23 as per P2165R4.
+ * include/bits/utility.h (ranges::__detail::__is_subrange):
+ Moved from <ranges>.
+ * include/bits/version.def (tuple_like): Define for C++23.
+ * include/bits/version.h: Regenerate.
+ * include/std/concepts (__different_from): Moved from
+ <bits/stl_iterator.h>.
+ (ranges::__swap::__adl_swap): Clarify which __detail namespace.
+ * include/std/map (__cpp_lib_tuple_like): Define C++23.
+ * include/std/ranges (__detail::__is_subrange): Moved to
+ <bits/utility.h>.
+ (__detail::__is_subrange<subrange>): Moved to <bits/ranges_util.h>
+ (__detail::__has_tuple_element): Adjust for C++23 as per P2165R4.
+ (__detail::__tuple_or_pair): Remove as per P2165R4. Replace all
+ uses with plain tuple as per P2165R4.
+ * include/std/tuple (__cpp_lib_tuple_like): Define for C++23.
+ (__tuple_like_tag_t): Define for C++23.
+ (__tuple_cmp): Forward declare for C++23.
+ (_Tuple_impl::_Tuple_impl): Define overloads taking
+ __tuple_like_tag_t and a tuple-like type for C++23.
+ (_Tuple_impl::_M_assign): Likewise.
+ (tuple::__constructible_from_tuple_like): Define for C++23.
+ (tuple::__convertible_from_tuple_like): Define for C++23.
+ (tuple::__dangles_from_tuple_like): Define for C++23.
+ (tuple::tuple): Define overloads taking a tuple-like type for
+ C++23 as per P2165R4.
+ (tuple::__assignable_from_tuple_like): Define for C++23.
+ (tuple::__const_assignable_from_tuple_like): Define for C++23.
+ (tuple::operator=): Define overloads taking a tuple-like type
+ for C++23 as per P2165R4.
+ (tuple::__tuple_like_common_comparison_category): Define for C++23.
+ (tuple::operator<=>): Define overload taking a tuple-like type
+ for C++23 as per P2165R4.
+ (array, get): Forward declarations moved to <bits/stl_pair.h>.
+ (tuple_cat): Constrain with __tuple_like for C++23 as per P2165R4.
+ (apply): Likewise.
+ (make_from_tuple): Likewise.
+ (__tuple_like_common_reference): Define for C++23.
+ (basic_common_reference): Adjust as per P2165R4.
+ (__tuple_like_common_type): Define for C++23.
+ (common_type): Adjust as per P2165R4.
+ * include/std/unordered_map (__cpp_lib_tuple_like): Define for
+ C++23.
+ * include/std/utility (__cpp_lib_tuple_like): Define for C++23.
+ * testsuite/std/ranges/zip/1.cc (test01): Adjust to handle pair
+ and 2-tuple interchangeably.
+ (test05): New test.
+ * testsuite/20_util/pair/p2165r4.cc: New test.
+ * testsuite/20_util/tuple/p2165r4.cc: New test.
+
+2024-02-01 Patrick Palka <ppalka@redhat.com>
+
+ * include/bits/stl_pair.h (pair::_S_const_assignable): Define,
+ factored out from ...
+ (pair::operator=): ... the constraints of the const overloads.
+
+2024-02-01 Jonathan Wakely <jwakely@redhat.com>
+
+ * include/bits/version.tpl: Do not use def-file-line for each
+ macro being defined.
+ * include/bits/version.h: Regenerate.
+
+2024-02-01 Jonathan Wakely <jwakely@redhat.com>
+
+ * testsuite/25_algorithms/copy/debug/constexpr_neg.cc: Adjust
+ dg-error pattern.
+ * testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc:
+ Likewise.
+ * testsuite/25_algorithms/equal/debug/constexpr_neg.cc:
+ Likewise.
+ * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc:
+ Likewise.
+ * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc:
+ Likewise.
+ * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc:
+ Likewise.
+ * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc:
+ Likewise.
+ * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc:
+ Likewise.
+ * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc:
+ Likewise.
+
+2024-02-01 Jonathan Wakely <jwakely@redhat.com>
+
+ * include/experimental/internet (network_v4::to_string()):
+ Remove lambda and use of resize_and_overwrite.
+
+2024-01-31 Jonathan Wakely <jwakely@redhat.com>
+
+ * acinclude.m4 (GLIBCXX_CHECK_TEXT_ENCODING): Use <xlocale.h> if
+ needed for newlocale.
+ * configure: Regenerate.
+ * src/c++26/text_encoding.cc: Use <xlocale.h>.
+
+2024-01-31 Jonathan Wakely <jwakely@redhat.com>
+ Ewan Higgs <ewan.higgs@gmail.com>
+
+ * include/bits/text_encoding-data.h: Regenerate.
+ * scripts/gen_text_encoding_data.py: Add extra_aliases dict
+ containing "ASCII".
+ * testsuite/std/text_encoding/cons.cc: Check "ascii" is known.
+
+2024-01-31 Jonathan Wakely <jwakely@redhat.com>
+
+ * doc/xml/manual/using.xml: Update tables of supported headers.
+ * doc/html/*: Regenerate.
+
+2024-01-31 Jonathan Wakely <jwakely@redhat.com>
+
+ * include/std/bitset (_Base_bitset::_M_do_to_ullong): Avoid
+ -Wshift-count-overflow warning.
+
+2024-01-30 Jonathan Wakely <jwakely@redhat.com>
+
+ * testsuite/std/time/clock/gps/io.cc: Fix expected result in
+ assertion and call test_format() from main.
+
+2024-01-29 François Dumont <fdumont@gcc.gnu.org>
+
+ * doc/xml/manual/debug_mode.xml: Link against libstdc++exp.a to use
+ _GLIBCXX_DEBUG_BACKTRACE macro.
+
+2024-01-24 Huanghui Nie <nnnjkk@gmail.com>
+ Théo Papadopoulo <papadopoulo@gmail.com>
+
+ * include/bits/hashtable.h (_Hahstable<>::_M_remove_bucket_begin): Remove
+ _M_before_begin check and cleanup implementation.
+
+2024-01-22 Jonathan Wakely <jwakely@redhat.com>
+
+ * testsuite/std/time/clock/file/io.cc: Fix expected result in
+ assertion and call test_format() from main.
+
+2024-01-21 Jonathan Wakely <jwakely@redhat.com>
+
+ PR libstdc++/113500
+ * include/bits/chrono_io.h (__formatter_chrono::_M_S): Fix
+ printing of subseconds with floating-point rep.
+ (__formatter_chrono::_M_format_to_ostream): Do not write
+ time_point specializations directly to the ostream.
+ (formatter<chrono::sys_time<D>, C>::parse): Do not allow an
+ empty chrono-spec if the type fails to meet the constraints for
+ writing to an ostream with operator<<.
+ * testsuite/std/time/clock/file/io.cc: Check formatting
+ non-integral times with empty chrono-specs.
+ * testsuite/std/time/clock/gps/io.cc: Likewise.
+ * testsuite/std/time/clock/utc/io.cc: Likewise.
+ * testsuite/std/time/hh_mm_ss/io.cc: Likewise.
+
+2024-01-21 Jonathan Wakely <jwakely@redhat.com>
+
+ * include/bits/chrono.h (__file_clock::from_sys)
+ (__file_clock::to_sys, __file_clock::_S_from_sys)
+ (__file_clock::_S_to_sys): Use common_type for return type.
+ * testsuite/std/time/clock/file/members.cc: Check round trip
+ conversion for time with lower precision that seconds.
+
+2024-01-21 Jonathan Wakely <jwakely@redhat.com>
+
+ PR libstdc++/113512
+ * include/std/format (__formatter_fp::format): Fix logic for
+ alternate forms.
+ * testsuite/std/format/functions/format.cc: Check buggy cases of
+ alternate forms with g presentation type.
+
+2024-01-20 Marek Polacek <polacek@redhat.com>
+
+ PR c++/111410
+ * include/std/ranges: Add #pragma to disable -Wdangling-reference with
+ std::ranges::views::__adaptor::operator|.
+
2024-01-19 Jonathan Wakely <jwakely@redhat.com>
* include/std/format (_Spec::_M_parse_fill_and_align): Do not
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