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llvm-project/libcxx/docs/Status/Cxx20Issues.csv
h-vetinari 8b19d29a3f
[libc++] remove minor version in status pages (#113241) 
Minor version of releases starts at `N.1.0` for all releases since 4532617ae42005.

The current status pages are not terribly wrong (the version during
development can be considered `N.0`), but still it's kinda weird to use
versions that never get released as the lower bound.
2024-11-04 10:48:50 -05:00

43 KiB
Raw Blame History

1Issue #Issue NameMeetingStatusFirst released versionNotes
2`LWG2070 <https://wg21.link/LWG2070>`__``allocate_shared``\ should use ``allocator_traits<A>::construct``\ 2017-07 (Toronto)|Nothing To Do|Resolved by `P0674R1 <https://wg21.link/P0674R1>`__
3`LWG2444 <https://wg21.link/LWG2444>`__Inconsistent complexity for ``std::sort_heap``\ 2017-07 (Toronto)|Nothing To Do|
4`LWG2593 <https://wg21.link/LWG2593>`__Moved-from state of Allocators2017-07 (Toronto)|Nothing To Do|
5`LWG2597 <https://wg21.link/LWG2597>`__``std::log``\ misspecified for complex numbers2017-07 (Toronto)
6`LWG2783 <https://wg21.link/LWG2783>`__``stack::emplace()``\ and ``queue::emplace()``\ should return ``decltype(auto)``\ 2017-07 (Toronto)|Complete|
7`LWG2932 <https://wg21.link/LWG2932>`__Constraints on parallel algorithm implementations are underspecified2017-07 (Toronto)
8`LWG2937 <https://wg21.link/LWG2937>`__Is ``equivalent("existing_thing", "not_existing_thing")``\ an error2017-07 (Toronto)|Complete|
9`LWG2940 <https://wg21.link/LWG2940>`__``result_of``\ specification also needs a little cleanup2017-07 (Toronto)|Nothing To Do|
10`LWG2942 <https://wg21.link/LWG2942>`__LWG 2873's resolution missed ``weak_ptr::owner_before``\ 2017-07 (Toronto)|Complete|
11`LWG2954 <https://wg21.link/LWG2954>`__Specialization of the convenience variable templates should be prohibited2017-07 (Toronto)|Complete|
12`LWG2961 <https://wg21.link/LWG2961>`__Bad postcondition for ``set_default_resource``\ 2017-07 (Toronto)|Complete|16
13`LWG2966 <https://wg21.link/LWG2966>`__Incomplete resolution of US 742017-07 (Toronto)|Nothing To Do|
14`LWG2974 <https://wg21.link/LWG2974>`__Diagnose out of bounds ``tuple_element/variant_alternative``\ 2017-07 (Toronto)|Complete|
15
16`LWG2779 <https://wg21.link/LWG2779>`__[networking.ts] Relax requirements on buffer sequence iterators2017-11 (Albuquerque)
17`LWG2870 <https://wg21.link/LWG2870>`__Default value of parameter theta of polar should be dependent2017-11 (Albuquerque)|Complete|
18`LWG2935 <https://wg21.link/LWG2935>`__What should create_directories do when p already exists but is not a directory?2017-11 (Albuquerque)|Nothing To Do|
19`LWG2941 <https://wg21.link/LWG2941>`__[thread.req.timing] wording should apply to both member and namespace-level functions2017-11 (Albuquerque)|Nothing To Do|
20`LWG2944 <https://wg21.link/LWG2944>`__LWG 2905 accidentally removed requirement that construction of the deleter doesn't throw an exception2017-11 (Albuquerque)|Nothing To Do|
21`LWG2945 <https://wg21.link/LWG2945>`__Order of template parameters in optional comparisons2017-11 (Albuquerque)|Complete|
22`LWG2948 <https://wg21.link/LWG2948>`__unique_ptr does not define operator<< for stream output2017-11 (Albuquerque)|Complete|
23`LWG2950 <https://wg21.link/LWG2950>`__std::byte operations are misspecified2017-11 (Albuquerque)|Complete|
24`LWG2952 <https://wg21.link/LWG2952>`__iterator_traits should work for pointers to cv T2017-11 (Albuquerque)|Complete|
25`LWG2953 <https://wg21.link/LWG2953>`__LWG 2853 should apply to deque::erase too2017-11 (Albuquerque)|Complete|
26`LWG2958 <https://wg21.link/LWG2958>`__Moves improperly defined as deleted2017-11 (Albuquerque)|Complete|
27`LWG2964 <https://wg21.link/LWG2964>`__Apparently redundant requirement for dynamic_pointer_cast2017-11 (Albuquerque)
28`LWG2965 <https://wg21.link/LWG2965>`__Non-existing path::native_string() in filesystem_error::what() specification2017-11 (Albuquerque)|Nothing To Do|
29`LWG2972 <https://wg21.link/LWG2972>`__What is ``is_trivially_destructible_v<int>``\ ?2017-11 (Albuquerque)|Complete|
30`LWG2976 <https://wg21.link/LWG2976>`__Dangling uses_allocator specialization for packaged_task2017-11 (Albuquerque)|Complete|20Originally implemented in LLVM 6 but reverted later. Old documentation incorrectly said it was implemented.
31`LWG2977 <https://wg21.link/LWG2977>`__unordered_meow::merge() has incorrect Throws: clause2017-11 (Albuquerque)|Nothing To Do|
32`LWG2978 <https://wg21.link/LWG2978>`__Hash support for pmr::string and friends2017-11 (Albuquerque)|Complete|16
33`LWG2979 <https://wg21.link/LWG2979>`__aligned_union should require complete object types2017-11 (Albuquerque)|Complete|
34`LWG2980 <https://wg21.link/LWG2980>`__Cannot compare_exchange empty pointers2017-11 (Albuquerque)
35`LWG2981 <https://wg21.link/LWG2981>`__Remove redundant deduction guides from standard library2017-11 (Albuquerque)|Nothing To Do|
36`LWG2982 <https://wg21.link/LWG2982>`__Making size_type consistent in associative container deduction guides2017-11 (Albuquerque)
37`LWG2988 <https://wg21.link/LWG2988>`__Clause 32 cleanup missed one typename2017-11 (Albuquerque)|Complete|13
38`LWG2993 <https://wg21.link/LWG2993>`__reference_wrapper<T> conversion from T&&2017-11 (Albuquerque)|Complete|13
39`LWG2998 <https://wg21.link/LWG2998>`__Requirements on function objects passed to {``forward_``,}list-specific algorithms2017-11 (Albuquerque)|Nothing To Do|
40`LWG3001 <https://wg21.link/LWG3001>`__weak_ptr::element_type needs remove_extent_t2017-11 (Albuquerque)|Complete|14
41`LWG3024 <https://wg21.link/LWG3024>`__variant's copies must be deleted instead of disabled via SFINAE2017-11 (Albuquerque)|Complete|
42
43`LWG2164 <https://wg21.link/LWG2164>`__What are the semantics of ``vector.emplace(vector.begin(), vector.back())``\ ?2018-03 (Jacksonville)|Complete|
44`LWG2243 <https://wg21.link/LWG2243>`__``istream::putback``\ problem2018-03 (Jacksonville)|Complete|
45`LWG2816 <https://wg21.link/LWG2816>`__``resize_file``\ has impossible postcondition2018-03 (Jacksonville)|Nothing To Do|
46`LWG2843 <https://wg21.link/LWG2843>`__Unclear behavior of ``std::pmr::memory_resource::do_allocate()``\ 2018-03 (Jacksonville)|Complete|
47`LWG2849 <https://wg21.link/LWG2849>`__Why does ``!is_regular_file(from)``\ cause ``copy_file``\ to report a "file already exists" error?2018-03 (Jacksonville)|Nothing To Do|
48`LWG2851 <https://wg21.link/LWG2851>`__``std::filesystem``\ enum classes are now underspecified2018-03 (Jacksonville)|Nothing To Do|
49`LWG2946 <https://wg21.link/LWG2946>`__LWG 2758's resolution missed further corrections2018-03 (Jacksonville)|Complete|
50`LWG2969 <https://wg21.link/LWG2969>`__``polymorphic_allocator::construct()``\ shouldn't pass ``resource()``\ 2018-03 (Jacksonville)|Complete|
51`LWG2975 <https://wg21.link/LWG2975>`__Missing case for ``pair``\ construction in scoped and polymorphic allocators2018-03 (Jacksonville)
52`LWG2989 <https://wg21.link/LWG2989>`__``path``\ 's stream insertion operator lets you insert everything under the sun2018-03 (Jacksonville)|Complete|
53`LWG3000 <https://wg21.link/LWG3000>`__``monotonic_memory_resource::do_is_equal``\ uses ``dynamic_cast``\ unnecessarily2018-03 (Jacksonville)|Complete|16
54`LWG3002 <https://wg21.link/LWG3002>`__[networking.ts] ``basic_socket_acceptor::is_open()``\ isn't ``noexcept``\ 2018-03 (Jacksonville)
55`LWG3004 <https://wg21.link/LWG3004>`__|sect|\ [string.capacity] and |sect|\ [vector.capacity] should specify time complexity for ``capacity()``\ 2018-03 (Jacksonville)|Nothing To Do|
56`LWG3005 <https://wg21.link/LWG3005>`__Destruction order of arrays by ``make_shared/allocate_shared``\ only recommended?2018-03 (Jacksonville)
57`LWG3007 <https://wg21.link/LWG3007>`__``allocate_shared``\ should rebind allocator to *cv*-unqualified ``value_type``\ for construction2018-03 (Jacksonville)
58`LWG3009 <https://wg21.link/LWG3009>`__Including ``<string_view>``\ doesn't provide ``std::size/empty/data``\ 2018-03 (Jacksonville)|Complete|
59`LWG3010 <https://wg21.link/LWG3010>`__[networking.ts] ``uses_executor``\ says "if a type ``T::executor_type``\ exists"2018-03 (Jacksonville)
60`LWG3013 <https://wg21.link/LWG3013>`__``(recursive_)directory_iterator``\ construction and traversal should not be ``noexcept``\ 2018-03 (Jacksonville)|Complete|
61`LWG3014 <https://wg21.link/LWG3014>`__More ``noexcept``\ issues with filesystem operations2018-03 (Jacksonville)|Complete|
62`LWG3015 <https://wg21.link/LWG3015>`__``copy_options::*unspecified*``\ underspecified2018-03 (Jacksonville)|Nothing To Do|
63`LWG3017 <https://wg21.link/LWG3017>`__``list splice``\ functions should use ``addressof``\ 2018-03 (Jacksonville)|Complete|
64`LWG3020 <https://wg21.link/LWG3020>`__[networking.ts] Remove spurious nested ``value_type``\ buffer sequence requirement2018-03 (Jacksonville)
65`LWG3026 <https://wg21.link/LWG3026>`__``filesystem::weakly_canonical``\ still defined in terms of ``canonical(p, base)``\ 2018-03 (Jacksonville)|Complete|
66`LWG3030 <https://wg21.link/LWG3030>`__Who shall meet the requirements of ``try_lock``\ ?2018-03 (Jacksonville)|Nothing To Do|
67`LWG3034 <https://wg21.link/LWG3034>`__P0767R1 breaks previously-standard-layout types2018-03 (Jacksonville)|Complete|
68`LWG3035 <https://wg21.link/LWG3035>`__``std::allocator``\ 's constructors should be ``constexpr``\ 2018-03 (Jacksonville)|Complete|
69`LWG3039 <https://wg21.link/LWG3039>`__Unnecessary ``decay``\ in ``thread``\ and ``packaged_task``\ 2018-03 (Jacksonville)|Complete|
70`LWG3041 <https://wg21.link/LWG3041>`__Unnecessary ``decay``\ in ``reference_wrapper``\ 2018-03 (Jacksonville)|Complete|
71`LWG3042 <https://wg21.link/LWG3042>`__``is_literal_type_v``\ should be inline2018-03 (Jacksonville)|Complete|
72`LWG3043 <https://wg21.link/LWG3043>`__Bogus postcondition for ``filesystem_error``\ constructor2018-03 (Jacksonville)|Complete|
73`LWG3045 <https://wg21.link/LWG3045>`__``atomic<floating-point>``\ doesn't have ``value_type``\ or ``difference_type``\ 2018-03 (Jacksonville)|Complete|18
74`LWG3048 <https://wg21.link/LWG3048>`__``transform_reduce(exec, first1, last1, first2, init)``\ discards execution policy2018-03 (Jacksonville)|Complete|17
75`LWG3051 <https://wg21.link/LWG3051>`__Floating point classifications were inadvertently changed in P01752018-03 (Jacksonville)|Nothing To Do|
76`LWG3075 <https://wg21.link/LWG3075>`__``basic_string``\ needs deduction guides from ``basic_string_view``\ 2018-03 (Jacksonville)|Complete|
77
78`LWG2139 <https://wg21.link/LWG2139>`__What is a user-defined type?2018-06 (Rapperswil)
79`LWG2970 <https://wg21.link/LWG2970>`__Return type of std::visit misspecified2018-06 (Rapperswil)|Complete|11
80`LWG3058 <https://wg21.link/LWG3058>`__Parallel adjacent_difference shouldn't require creating temporaries2018-06 (Rapperswil)
81`LWG3062 <https://wg21.link/LWG3062>`__Unnecessary decay_t in is_execution_policy_v should be remove_cvref_t2018-06 (Rapperswil)|Complete|17
82`LWG3067 <https://wg21.link/LWG3067>`__recursive_directory_iterator::pop must invalidate2018-06 (Rapperswil)|Nothing To Do|
83`LWG3071 <https://wg21.link/LWG3071>`__[networking.ts] read_until still refers to "input sequence"2018-06 (Rapperswil)|Nothing To Do|
84`LWG3074 <https://wg21.link/LWG3074>`__Non-member functions for valarray should only deduce from the valarray2018-06 (Rapperswil)
85`LWG3076 <https://wg21.link/LWG3076>`__basic_string CTAD ambiguity2018-06 (Rapperswil)|Complete|
86`LWG3079 <https://wg21.link/LWG3079>`__LWG 2935 forgot to fix the existing_p overloads of create_directory2018-06 (Rapperswil)|Nothing To Do|
87`LWG3080 <https://wg21.link/LWG3080>`__Floating point from_chars pattern specification breaks round-tripping2018-06 (Rapperswil)
88`LWG3083 <https://wg21.link/LWG3083>`__What should ios::iword(-1) do?2018-06 (Rapperswil)|Nothing To Do|
89`LWG3094 <https://wg21.link/LWG3094>`__[time.duration.io]p4 makes surprising claims about encoding2018-06 (Rapperswil)
90`LWG3100 <https://wg21.link/LWG3100>`__Unnecessary and confusing "empty span" wording2018-06 (Rapperswil)|Nothing To Do|
91`LWG3102 <https://wg21.link/LWG3102>`__Clarify span iterator and ``const_iterator`` behavior2018-06 (Rapperswil)|Complete|
92`LWG3104 <https://wg21.link/LWG3104>`__Fixing duration division2018-06 (Rapperswil)|Complete|
93
94`LWG2183 <https://wg21.link/LWG2183>`__Muddled allocator requirements for ``match_results``\ constructors2018-11 (San Diego)|Complete|
95`LWG2184 <https://wg21.link/LWG2184>`__Muddled allocator requirements for ``match_results``\ assignments2018-11 (San Diego)|Complete|
96`LWG2412 <https://wg21.link/LWG2412>`__``promise::set_value()``\ and ``promise::get_future()``\ should not race2018-11 (San Diego)
97`LWG2499 <https://wg21.link/LWG2499>`__``operator>>(basic_istream&, CharT*)``\ makes it hard to avoid buffer overflows2018-11 (San Diego)|Nothing To Do|Resolved by `P0487R1 <https://wg21.link/P0487R1>`__
98`LWG2682 <https://wg21.link/LWG2682>`__``filesystem::copy()``\ won't create a symlink to a directory2018-11 (San Diego)|Nothing To Do|
99`LWG2697 <https://wg21.link/LWG2697>`__[concurr.ts] Behavior of ``future/shared_future``\ unwrapping constructor when given an invalid ``future``\ 2018-11 (San Diego)
100`LWG2797 <https://wg21.link/LWG2797>`__Trait precondition violations2018-11 (San Diego)|Nothing To Do|Resolved by `P1285R0 <https://wg21.link/P1285R0>`__
101`LWG2936 <https://wg21.link/LWG2936>`__Path comparison is defined in terms of the generic format2018-11 (San Diego)|Complete|
102`LWG2943 <https://wg21.link/LWG2943>`__Problematic specification of the wide version of ``basic_filebuf::open``\ 2018-11 (San Diego)|Nothing To Do|
103`LWG2960 <https://wg21.link/LWG2960>`__[fund.ts.v3] ``nonesuch``\ is insufficiently useless2018-11 (San Diego)|Complete|
104`LWG2995 <https://wg21.link/LWG2995>`__``basic_stringbuf``\ default constructor forbids it from using SSO capacity2018-11 (San Diego)|Complete|20
105`LWG2996 <https://wg21.link/LWG2996>`__Missing rvalue overloads for ``shared_ptr``\ operations2018-11 (San Diego)|Complete|17
106`LWG3008 <https://wg21.link/LWG3008>`__``make_shared``\ (sub)object destruction semantics are not specified2018-11 (San Diego)|Complete|16
107`LWG3022 <https://wg21.link/LWG3022>`__``is_convertible<derived*, base*>``\ may lead to ODR2018-11 (San Diego)|Nothing To Do|Resolved by `P1285R0 <https://wg21.link/P1285R0>`__
108`LWG3025 <https://wg21.link/LWG3025>`__Map-like container deduction guides should use ``pair<Key, T>``\ , not ``pair<const Key, T>``\ 2018-11 (San Diego)|Complete|
109`LWG3031 <https://wg21.link/LWG3031>`__Algorithms and predicates with non-const reference arguments2018-11 (San Diego)
110`LWG3037 <https://wg21.link/LWG3037>`__``polymorphic_allocator``\ and incomplete types2018-11 (San Diego)|Complete|16
111`LWG3038 <https://wg21.link/LWG3038>`__``polymorphic_allocator::allocate``\ should not allow integer overflow to create vulnerabilities2018-11 (San Diego)|Complete|14
112`LWG3054 <https://wg21.link/LWG3054>`__``uninitialized_copy``\ appears to not be able to meet its exception-safety guarantee2018-11 (San Diego)|Nothing To Do|
113`LWG3065 <https://wg21.link/LWG3065>`__LWG 2989 missed that all ``path``\ 's other operators should be hidden friends as well2018-11 (San Diego)|Complete|
114`LWG3096 <https://wg21.link/LWG3096>`__``path::lexically_relative``\ is confused by trailing slashes2018-11 (San Diego)|Complete|
115`LWG3116 <https://wg21.link/LWG3116>`__``OUTERMOST_ALLOC_TRAITS``\ needs ``remove_reference_t``\ 2018-11 (San Diego)
116`LWG3122 <https://wg21.link/LWG3122>`__``__cpp_lib_chrono_udls``\ was accidentally dropped2018-11 (San Diego)|Complete|
117`LWG3127 <https://wg21.link/LWG3127>`__``basic_osyncstream::rdbuf``\ needs a ``const_cast``\ 2018-11 (San Diego)|Complete|18
118`LWG3128 <https://wg21.link/LWG3128>`__``strstream::rdbuf``\ needs a ``const_cast``\ 2018-11 (San Diego)|Nothing To Do|
119`LWG3129 <https://wg21.link/LWG3129>`__``regex_token_iterator``\ constructor uses wrong pointer arithmetic2018-11 (San Diego)
120`LWG3130 <https://wg21.link/LWG3130>`__|sect|\ [input.output] needs many ``addressof``\ 2018-11 (San Diego)|Complete|20
121`LWG3131 <https://wg21.link/LWG3131>`__``addressof``\ all the things2018-11 (San Diego)
122`LWG3132 <https://wg21.link/LWG3132>`__Library needs to ban macros named ``expects``\ or ``ensures``\ 2018-11 (San Diego)|Nothing To Do|
123`LWG3134 <https://wg21.link/LWG3134>`__[fund.ts.v3] LFTSv3 contains extraneous [meta] variable templates that should have been deleted by P099612018-11 (San Diego)|Nothing To Do|Resolved by `P1210R0 <https://wg21.link/P1210R0>`__
124`LWG3137 <https://wg21.link/LWG3137>`__Header for ``__cpp_lib_to_chars``\ 2018-11 (San Diego)|Complete|
125`LWG3140 <https://wg21.link/LWG3140>`__``COMMON_REF``\ is unimplementable as specified2018-11 (San Diego)|Nothing To Do|
126`LWG3145 <https://wg21.link/LWG3145>`__``file_clock``\ breaks ABI for C++17 implementations2018-11 (San Diego)|Complete|
127`LWG3147 <https://wg21.link/LWG3147>`__Definitions of "likely" and "unlikely" are likely to cause problems2018-11 (San Diego)|Nothing To Do|
128`LWG3148 <https://wg21.link/LWG3148>`__``<concepts>``\ should be freestanding2018-11 (San Diego)
129`LWG3153 <https://wg21.link/LWG3153>`__``Common``\ and ``common_type``\ have too little in common2018-11 (San Diego)|Complete|13
130`LWG3154 <https://wg21.link/LWG3154>`__``Common``\ and ``CommonReference``\ have a common defect2018-11 (San Diego)|Nothing To Do|
131
132`LWG3012 <https://wg21.link/LWG3012>`__``atomic<T>``\ is unimplementable for non-``is_trivially_copy_constructible T``\ 2019-02 (Kona)
133`LWG3040 <https://wg21.link/LWG3040>`__``basic_string_view::starts_with``\ *Effects* are incorrect2019-02 (Kona)|Complete|
134`LWG3077 <https://wg21.link/LWG3077>`__``(push|emplace)_back``\ should invalidate the ``end``\ iterator2019-02 (Kona)|Nothing To Do|
135`LWG3087 <https://wg21.link/LWG3087>`__One final ``&x``\ in |sect|\ [list.ops]2019-02 (Kona)|Nothing To Do|
136`LWG3101 <https://wg21.link/LWG3101>`__``span``\ 's ``Container``\ constructors need another constraint2019-02 (Kona)|Complete|
137`LWG3112 <https://wg21.link/LWG3112>`__``system_error``\ and ``filesystem_error``\ constructors taking a ``string``\ may not be able to meet their postconditions2019-02 (Kona)|Nothing To Do|
138`LWG3119 <https://wg21.link/LWG3119>`__Program-definedness of closure types2019-02 (Kona)|Nothing To Do|
139`LWG3133 <https://wg21.link/LWG3133>`__Modernizing numeric type requirements2019-02 (Kona)
140`LWG3144 <https://wg21.link/LWG3144>`__``span``\ does not have a ``const_pointer``\ typedef2019-02 (Kona)|Complete|
141`LWG3173 <https://wg21.link/LWG3173>`__Enable CTAD for ``ref-view``\ 2019-02 (Kona)|Complete|15
142`LWG3179 <https://wg21.link/LWG3179>`__``subrange``\ should always model ``Range``\ 2019-02 (Kona)|Nothing To Do|
143`LWG3180 <https://wg21.link/LWG3180>`__Inconsistently named return type for ``ranges::minmax_element``\ 2019-02 (Kona)|Complete|15
144`LWG3182 <https://wg21.link/LWG3182>`__Specification of ``Same``\ could be clearer2019-02 (Kona)|Complete|15
145
146`LWG2899 <https://wg21.link/LWG2899>`__``is_(nothrow_)move_constructible``\ and ``tuple``\ , ``optional``\ and ``unique_ptr``\ 2019-07 (Cologne)
147`LWG3055 <https://wg21.link/LWG3055>`__``path::operator+=(*single-character*)``\ misspecified2019-07 (Cologne)|Complete|7
148`LWG3158 <https://wg21.link/LWG3158>`__``tuple(allocator_arg_t, const Alloc&)``\ should be conditionally explicit2019-07 (Cologne)|Complete|10
149`LWG3169 <https://wg21.link/LWG3169>`__``ranges``\ permutation generators discard useful information2019-07 (Cologne)|Complete|15
150`LWG3183 <https://wg21.link/LWG3183>`__Normative permission to specialize Ranges variable templates2019-07 (Cologne)|Nothing To Do|
151`LWG3184 <https://wg21.link/LWG3184>`__Inconsistencies in ``bind_front``\ wording2019-07 (Cologne)|Complete|13
152`LWG3185 <https://wg21.link/LWG3185>`__Uses-allocator construction functions missing ``constexpr``\ and ``noexcept``\ 2019-07 (Cologne)|Complete|16
153`LWG3186 <https://wg21.link/LWG3186>`__``ranges``\ removal, partition, and ``partial_sort_copy``\ algorithms discard useful information2019-07 (Cologne)|Complete|15
154`LWG3187 <https://wg21.link/LWG3187>`__`P0591R4 <https://wg21.link/p0591r4>`__ reverted DR 2586 fixes to ``scoped_allocator_adaptor::construct()``\ 2019-07 (Cologne)
155`LWG3191 <https://wg21.link/LWG3191>`__``std::ranges::shuffle``\ synopsis does not match algorithm definition2019-07 (Cologne)|Complete|15
156`LWG3196 <https://wg21.link/LWG3196>`__``std::optional<T>``\ is ill-formed is ``T``\ is an array2019-07 (Cologne)|Complete|
157`LWG3198 <https://wg21.link/LWG3198>`__Bad constraint on ``std::span::span()``\ 2019-07 (Cologne)|Complete|
158`LWG3199 <https://wg21.link/LWG3199>`__``istream >> bitset<0>``\ fails2019-07 (Cologne)|Complete|10
159`LWG3202 <https://wg21.link/LWG3202>`__P0318R1 was supposed to be revised2019-07 (Cologne)|Complete|
160`LWG3206 <https://wg21.link/LWG3206>`__``year_month_day``\ conversion to ``sys_days``\ uses not-existing member function2019-07 (Cologne)|Complete|
161`LWG3208 <https://wg21.link/LWG3208>`__``Boolean``\ 's expression requirements are ordered inconsistently2019-07 (Cologne)|Nothing To Do|
162`LWG3209 <https://wg21.link/LWG3209>`__Expression in ``year::ok()``\ returns clause is ill-formed2019-07 (Cologne)|Complete|
163
164`LWG3231 <https://wg21.link/LWG3231>`__``year_month_day_last::day``\ specification does not cover ``!ok()``\ values2019-11 (Belfast)|Nothing To Do|
165`LWG3225 <https://wg21.link/LWG3225>`__``zoned_time``\ converting constructor shall not be ``noexcept``\ 2019-11 (Belfast)|Complete|19
166`LWG3190 <https://wg21.link/LWG3190>`__``std::allocator::allocate``\ sometimes returns too little storage2019-11 (Belfast)|Complete|14
167`LWG3218 <https://wg21.link/LWG3218>`__Modifier for ``%d``\ parse flag does not match POSIX and ``format``\ specification2019-11 (Belfast)
168`LWG3224 <https://wg21.link/LWG3224>`__``zoned_time``\ constructor from ``TimeZonePtr``\ does not specify initialization of ``tp_``\ 2019-11 (Belfast)|Complete|19
169`LWG3230 <https://wg21.link/LWG3230>`__Format specifier ``%y/%Y``\ is missing locale alternative versions2019-11 (Belfast)|Complete|16
170`LWG3232 <https://wg21.link/LWG3232>`__Inconsistency in ``zoned_time``\ deduction guides2019-11 (Belfast)|Complete|19
171`LWG3222 <https://wg21.link/LWG3222>`__P0574R1 introduced preconditions on non-existent parameters2019-11 (Belfast)
172`LWG3221 <https://wg21.link/LWG3221>`__Result of ``year_month``\ arithmetic with ``months``\ is ambiguous2019-11 (Belfast)|Complete|8
173`LWG3235 <https://wg21.link/LWG3235>`__``parse``\ manipulator without abbreviation is not callable2019-11 (Belfast)
174`LWG3246 <https://wg21.link/LWG3246>`__LWG3246: What are the constraints on the template parameter of `basic_format_arg`?2019-11 (Belfast)|Nothing To Do|
175`LWG3253 <https://wg21.link/LWG3253>`__``basic_syncbuf::basic_syncbuf()``\ should not be explicit2019-11 (Belfast)|Complete|20
176`LWG3245 <https://wg21.link/LWG3245>`__Unnecessary restriction on ``'%p'``\ parse specifier2019-11 (Belfast)
177`LWG3244 <https://wg21.link/LWG3244>`__Constraints for ``Source``\ in |sect|\ [fs.path.req] insufficiently constrainty2019-11 (Belfast)
178`LWG3241 <https://wg21.link/LWG3241>`__``chrono-spec``\ grammar ambiguity in |sect|\ [time.format]2019-11 (Belfast)|Complete|16
179`LWG3257 <https://wg21.link/LWG3257>`__Missing feature testing macro update from P08582019-11 (Belfast)|Complete|12
180`LWG3256 <https://wg21.link/LWG3256>`__Feature testing macro for ``constexpr``\ algorithms2019-11 (Belfast)|Complete|13
181`LWG3273 <https://wg21.link/LWG3273>`__Specify ``weekday_indexed``\ to range of ``[0, 7]``\ 2019-11 (Belfast)|Complete|16
182`LWG3070 <https://wg21.link/LWG3070>`__``path::lexically_relative``\ causes surprising results if a filename can also be a *root-name*2019-11 (Belfast)
183`LWG3266 <https://wg21.link/LWG3266>`__``to_chars(bool)``\ should be deleted2019-11 (Belfast)|Complete|14
184`LWG3272 <https://wg21.link/LWG3272>`__``%I%p``\ should parse/format ``duration``\ since midnight2019-11 (Belfast)
185`LWG3259 <https://wg21.link/LWG3259>`__The definition of *constexpr iterators* should be adjusted2019-11 (Belfast)|Nothing To Do|
186`LWG3103 <https://wg21.link/LWG3103>`__Errors in taking subview of ``span``\ should be ill-formed where possible2019-11 (Belfast)|Complete|11
187`LWG3274 <https://wg21.link/LWG3274>`__Missing feature test macro for ``<span>``\ 2019-11 (Belfast)|Complete|11
188`LWG3276 <https://wg21.link/LWG3276>`__Class ``split_view::outer_iterator::value_type``\ should inherit from ``view_interface``\ 2019-11 (Belfast)|Complete|15
189`LWG3277 <https://wg21.link/LWG3277>`__Pre-increment on prvalues is not a requirement of ``weakly_incrementable``\ 2019-11 (Belfast)|Nothing To Do|
190`LWG3149 <https://wg21.link/LWG3149>`__``DefaultConstructible``\ should require default initialization2019-11 (Belfast)|Complete|13
191
192`LWG1203 <https://wg21.link/LWG1203>`__More useful rvalue stream insertion2020-02 (Prague)|Complete|12
193`LWG2859 <https://wg21.link/LWG2859>`__Definition of *reachable* in [ptr.launder] misses pointer arithmetic from pointer-interconvertible object2020-02 (Prague)
194`LWG3018 <https://wg21.link/LWG3018>`__``shared_ptr``\ of function type2020-02 (Prague)|Nothing To Do|
195`LWG3050 <https://wg21.link/LWG3050>`__Conversion specification problem in ``chrono::duration``\ constructor2020-02 (Prague)|Complete|19
196`LWG3141 <https://wg21.link/LWG3141>`__``CopyConstructible``\ doesn't preserve source values2020-02 (Prague)|Nothing To Do|
197`LWG3150 <https://wg21.link/LWG3150>`__``UniformRandomBitGenerator``\ should validate ``min``\ and ``max``\ 2020-02 (Prague)|Complete|13
198`LWG3175 <https://wg21.link/LWG3175>`__The ``CommonReference``\ requirement of concept ``SwappableWith``\ is not satisfied in the example2020-02 (Prague)|Complete|13
199`LWG3194 <https://wg21.link/LWG3194>`__``ConvertibleTo``\ prose does not match code2020-02 (Prague)|Complete|13
200`LWG3200 <https://wg21.link/LWG3200>`__``midpoint``\ should not constrain ``T``\ is complete2020-02 (Prague)|Nothing To Do|
201`LWG3201 <https://wg21.link/LWG3201>`__``lerp``\ should be marked as ``noexcept``\ 2020-02 (Prague)|Complete|
202`LWG3226 <https://wg21.link/LWG3226>`__``zoned_time``\ constructor from ``string_view``\ should accept ``zoned_time<Duration2, TimeZonePtr2>``\ 2020-02 (Prague)|Complete|19
203`LWG3233 <https://wg21.link/LWG3233>`__Broken requirements for ``shared_ptr``\ converting constructors2020-02 (Prague)|Complete|19
204`LWG3237 <https://wg21.link/LWG3237>`__LWG 3038 and 3190 have inconsistent PRs2020-02 (Prague)|Complete|16
205`LWG3238 <https://wg21.link/LWG3238>`__Insufficiently-defined behavior of ``std::function``\ deduction guides2020-02 (Prague)|Nothing To Do|
206`LWG3242 <https://wg21.link/LWG3242>`__``std::format``\ : missing rules for ``arg-id``\ in ``width``\ and ``precision``\ 2020-02 (Prague)|Complete|14
207`LWG3243 <https://wg21.link/LWG3243>`__``std::format``\ and negative zeroes2020-02 (Prague)|Complete|14
208`LWG3247 <https://wg21.link/LWG3247>`__``ranges::iter_move``\ should perform ADL-only lookup of ``iter_move``\ 2020-02 (Prague)|Complete|15
209`LWG3248 <https://wg21.link/LWG3248>`__``std::format``\ ``#b``\ , ``#B``\ , ``#o``\ , ``#x``\ , and ``#X``\ presentation types misformat negative numbers2020-02 (Prague)|Complete|14
210`LWG3250 <https://wg21.link/LWG3250>`__``std::format``\ : ``#``\ (alternate form) for NaN and inf2020-02 (Prague)|Complete|14
211`LWG3251 <https://wg21.link/LWG3251>`__Are ``std::format``\ alignment specifiers applied to string arguments?2020-02 (Prague)|Complete|14
212`LWG3252 <https://wg21.link/LWG3252>`__Parse locale's aware modifiers for commands are not consistent with POSIX spec2020-02 (Prague)
213`LWG3254 <https://wg21.link/LWG3254>`__Strike ``stop_token``\ 's ``operator!=``\ 2020-02 (Prague)|Complete|17
214`LWG3255 <https://wg21.link/LWG3255>`__``span``\ 's ``array``\ constructor is too strict2020-02 (Prague)|Complete|
215`LWG3260 <https://wg21.link/LWG3260>`__``year_month*``\ arithmetic rejects durations convertible to years2020-02 (Prague)
216`LWG3262 <https://wg21.link/LWG3262>`__Formatting of negative durations is not specified2020-02 (Prague)|Complete|16
217`LWG3264 <https://wg21.link/LWG3264>`__``sized_range``\ and ``ranges::size``\ redundantly use ``disable_sized_range``\ 2020-02 (Prague)|Complete|15
218`LWG3269 <https://wg21.link/LWG3269>`__Parse manipulators do not specify the result of the extraction from stream2020-02 (Prague)
219`LWG3270 <https://wg21.link/LWG3270>`__Parsing and formatting ``%j``\ with ``duration``\ s2020-02 (Prague)|Partial|
220`LWG3280 <https://wg21.link/LWG3280>`__View converting constructors can cause constraint recursion and are unneeded2020-02 (Prague)|Complete|15
221`LWG3281 <https://wg21.link/LWG3281>`__Conversion from ``*pair-like*``\ types to ``subrange``\ is a silent semantic promotion2020-02 (Prague)|Complete|13
222`LWG3282 <https://wg21.link/LWG3282>`__``subrange``\ converting constructor should disallow derived to base conversions2020-02 (Prague)|Complete|15
223`LWG3284 <https://wg21.link/LWG3284>`__``random_access_iterator``\ semantic constraints accidentally promote difference type using unary negate2020-02 (Prague)|Nothing To Do|
224`LWG3285 <https://wg21.link/LWG3285>`__The type of a customization point object shall satisfy ``semiregular``\ 2020-02 (Prague)|Nothing To Do|
225`LWG3286 <https://wg21.link/LWG3286>`__``ranges::size``\ is not required to be valid after a call to ``ranges::begin``\ on an input range2020-02 (Prague)|Complete|15
226`LWG3291 <https://wg21.link/LWG3291>`__``iota_view::iterator``\ has the wrong ``iterator_category``\ 2020-02 (Prague)|Complete|15
227`LWG3292 <https://wg21.link/LWG3292>`__``iota_view``\ is under-constrained2020-02 (Prague)|Complete|15
228`LWG3294 <https://wg21.link/LWG3294>`__``zoned_time``\ deduction guides misinterprets ``string``\ /``char*``\ 2020-02 (Prague)|Complete|19
229`LWG3296 <https://wg21.link/LWG3296>`__Inconsistent default argument for ``basic_regex<>::assign``\ 2020-02 (Prague)|Complete|
230`LWG3299 <https://wg21.link/LWG3299>`__Pointers don't need customized iterator behavior2020-02 (Prague)|Complete|15
231`LWG3300 <https://wg21.link/LWG3300>`__Non-array ``ssize``\ overload is underconstrained2020-02 (Prague)|Nothing To Do|
232`LWG3301 <https://wg21.link/LWG3301>`__``transform_view::iterator``\ has incorrect ``iterator_category``\ 2020-02 (Prague)|Complete|15
233`LWG3302 <https://wg21.link/LWG3302>`__Range adaptor objects ``keys``\ and ``values``\ are unspecified2020-02 (Prague)|Complete|16
234`LWG3303 <https://wg21.link/LWG3303>`__Bad "``constexpr``\ " marker for ``destroy/destroy_n``\ 2020-02 (Prague)
235`LWG3304 <https://wg21.link/LWG3304>`__Allocate functions of ``std::polymorphic_allocator``\ should require ``[[nodiscard]]``\ 2020-02 (Prague)|Complete|16
236`LWG3307 <https://wg21.link/LWG3307>`__``std::allocator<void>().allocate(n)``\ 2020-02 (Prague)|Complete|20
237`LWG3310 <https://wg21.link/LWG3310>`__Replace ``SIZE_MAX``\ with ``numeric_limits<size_t>::max()``\ 2020-02 (Prague)|Complete|16
238`LWG3313 <https://wg21.link/LWG3313>`__``join_view::iterator::operator--``\ is incorrectly constrained2020-02 (Prague)|Complete|14
239`LWG3314 <https://wg21.link/LWG3314>`__Is stream insertion behavior locale dependent when ``Period::type``\ is ``micro``\ ?2020-02 (Prague)|Complete|16
240`LWG3315 <https://wg21.link/LWG3315>`__LWG3315: Correct Allocator Default Behavior2020-02 (Prague)|Complete|
241`LWG3316 <https://wg21.link/LWG3316>`__Correctly define epoch for ``utc_clock``\ / ``utc_timepoint``\ 2020-02 (Prague)
242`LWG3317 <https://wg21.link/LWG3317>`__Incorrect ``operator<<``\ for floating-point durations2020-02 (Prague)|Complete|16
243`LWG3318 <https://wg21.link/LWG3318>`__Clarify whether clocks can represent time before their epoch2020-02 (Prague)
244`LWG3319 <https://wg21.link/LWG3319>`__Properly reference specification of IANA time zone database2020-02 (Prague)|Nothing To Do|
245`LWG3320 <https://wg21.link/LWG3320>`__``span::cbegin/cend``\ methods produce different results than ``std::[ranges::]cbegin/cend``\ 2020-02 (Prague)|Complete|
246`LWG3321 <https://wg21.link/LWG3321>`__``uninitialized_construct_using_allocator``\ should use ``construct_at``\ 2020-02 (Prague)|Complete|16
247`LWG3323 <https://wg21.link/LWG3323>`__``*has-tuple-element*``\ helper concept needs ``convertible_to``\ 2020-02 (Prague)|Complete|16
248`LWG3324 <https://wg21.link/LWG3324>`__Special-case ``std::strong/weak/partial_order``\ for pointers2020-02 (Prague)|Complete|14
249`LWG3325 <https://wg21.link/LWG3325>`__Constrain return type of transformation function for ``transform_view``\ 2020-02 (Prague)|Complete|15
250`LWG3326 <https://wg21.link/LWG3326>`__``enable_view``\ has false positives2020-02 (Prague)|Complete|15
251`LWG3327 <https://wg21.link/LWG3327>`__Format alignment specifiers vs. text direction2020-02 (Prague)|Nothing To Do|
252`LWG3328 <https://wg21.link/LWG3328>`__Clarify that ``std::string``\ is not good for UTF-82020-02 (Prague)|Nothing To Do|
253`LWG3329 <https://wg21.link/LWG3329>`__``totally_ordered_with``\ both directly and indirectly requires ``common_reference_with``\ 2020-02 (Prague)|Complete|13
254`LWG3330 <https://wg21.link/LWG3330>`__Include ``<compare>``\ from most library headers2020-02 (Prague)|Complete|13
255`LWG3331 <https://wg21.link/LWG3331>`__Define ``totally_ordered/_with``\ in terms of ``partially-ordered-with``\ 2020-02 (Prague)|Complete|13
256`LWG3332 <https://wg21.link/LWG3332>`__Issue in |sect|\ [time.format]2020-02 (Prague)|Complete|16
257`LWG3334 <https://wg21.link/LWG3334>`__``basic_osyncstream``\ move assignment and destruction calls ``basic_syncbuf::emit()``\ twice2020-02 (Prague)|Complete|18
258`LWG3335 <https://wg21.link/LWG3335>`__Resolve C++20 NB comments US 273 and GB 2742020-02 (Prague)|Complete|15
259`LWG3338 <https://wg21.link/LWG3338>`__Rename ``default_constructible``\ to ``default_initializable``\ 2020-02 (Prague)|Complete|13
260`LWG3340 <https://wg21.link/LWG3340>`__Formatting functions should throw on argument/format string mismatch in |sect|\ [format.functions]2020-02 (Prague)|Complete|14
261`LWG3346 <https://wg21.link/LWG3346>`__``pair``\ and ``tuple``\ copy and move constructor have backwards specification2020-02 (Prague)|Nothing To Do|
262`LWG3347 <https://wg21.link/LWG3347>`__``std::pair<T, U>``\ now requires ``T``\ and ``U``\ to be less-than-comparable2020-02 (Prague)|Complete|17
263`LWG3348 <https://wg21.link/LWG3348>`__``__cpp_lib_unwrap_ref``\ in wrong header2020-02 (Prague)|Complete|12
264`LWG3349 <https://wg21.link/LWG3349>`__Missing ``__cpp_lib_constexpr_complex``\ for P0415R12020-02 (Prague)|Complete|16
265`LWG3350 <https://wg21.link/LWG3350>`__Simplify return type of ``lexicographical_compare_three_way``\ 2020-02 (Prague)|Complete|17
266`LWG3351 <https://wg21.link/LWG3351>`__``ranges::enable_safe_range``\ should not be constrained2020-02 (Prague)|Complete|15
267`LWG3352 <https://wg21.link/LWG3352>`__``strong_equality``\ isn't a thing2020-02 (Prague)|Complete|19
268`LWG3354 <https://wg21.link/LWG3354>`__``has_strong_structural_equality``\ has a meaningless definition2020-02 (Prague)|Nothing To Do|
269`LWG3355 <https://wg21.link/LWG3355>`__The memory algorithms should support move-only input iterators introduced by P12072020-02 (Prague)|Complete|15
270`LWG3356 <https://wg21.link/LWG3356>`__``__cpp_lib_nothrow_convertible``\ should be ``__cpp_lib_is_nothrow_convertible``\ 2020-02 (Prague)|Complete|12
271`LWG3358 <https://wg21.link/LWG3358>`__|sect|\ [span.cons] is mistaken that ``to_address``\ can throw2020-02 (Prague)|Complete|17
272`LWG3359 <https://wg21.link/LWG3359>`__``<chrono>``\ leap second support should allow for negative leap seconds2020-02 (Prague)|In Progress|
273`LWG3360 <https://wg21.link/LWG3360>`__``three_way_comparable_with``\ is inconsistent with similar concepts2020-02 (Prague)|Nothing To Do|
274`LWG3362 <https://wg21.link/LWG3362>`__Strike ``stop_source``\ 's ``operator!=``\ 2020-02 (Prague)|Complete|17
275`LWG3363 <https://wg21.link/LWG3363>`__``drop_while_view``\ should opt-out of ``sized_range``\ 2020-02 (Prague)|Nothing To Do|
276`LWG3364 <https://wg21.link/LWG3364>`__Initialize data members of ranges and their iterators2020-02 (Prague)|Complete|16
277`LWG3367 <https://wg21.link/LWG3367>`__Integer-class conversions should not throw2020-02 (Prague)|Nothing To Do|
278`LWG3369 <https://wg21.link/LWG3369>`__``span``\ 's deduction-guide for built-in arrays doesn't work2020-02 (Prague)|Complete|14
279`LWG3371 <https://wg21.link/LWG3371>`__``visit_format_arg``\ and ``make_format_args``\ are not hidden friends2020-02 (Prague)|Complete|14
280`LWG3372 <https://wg21.link/LWG3372>`__``vformat_to``\ should not try to deduce ``Out``\ twice2020-02 (Prague)|Complete|14
281`LWG3373 <https://wg21.link/LWG3373>`__``{to,from}_chars_result``\ and ``format_to_n_result``\ need the "we really mean what we say" wording2020-02 (Prague)|Complete|14
282`LWG3374 <https://wg21.link/LWG3374>`__P0653 + P1006 should have made the other ``std::to_address``\ overload ``constexpr``\ 2020-02 (Prague)|Complete|12
283`LWG3375 <https://wg21.link/LWG3375>`__``decay``\ in ``viewable_range``\ should be ``remove_cvref``\ 2020-02 (Prague)|Complete|15
284`LWG3377 <https://wg21.link/LWG3377>`__``elements_view::iterator``\ befriends a specialization of itself2020-02 (Prague)|Nothing To Do|
285`LWG3379 <https://wg21.link/LWG3379>`__"``safe``\ " in several library names is misleading2020-02 (Prague)|Complete|15
286`LWG3380 <https://wg21.link/LWG3380>`__``common_type``\ and comparison categories2020-02 (Prague)|Complete|15
287`LWG3381 <https://wg21.link/LWG3381>`__``begin``\ and ``data``\ must agree for ``contiguous_range``\ 2020-02 (Prague)|Nothing To Do|
288`LWG3382 <https://wg21.link/LWG3382>`__NTTP for ``pair``\ and ``array``\ 2020-02 (Prague)|Nothing To Do|
289`LWG3383 <https://wg21.link/LWG3383>`__|sect|\ [time.zone.leap.nonmembers] ``sys_seconds``\ should be replaced with ``seconds``\ 2020-02 (Prague)|Complete|19
290`LWG3384 <https://wg21.link/LWG3384>`__``transform_view::*sentinel*``\ has an incorrect ``operator-``\ 2020-02 (Prague)|Complete|15
291`LWG3385 <https://wg21.link/LWG3385>`__``common_iterator``\ is not sufficiently constrained for non-copyable iterators2020-02 (Prague)|Complete|15
292`LWG3387 <https://wg21.link/LWG3387>`__|sect|\ [range.reverse.view] ``reverse_view<V>``\ unintentionally requires ``range<const V>``\ 2020-02 (Prague)|Complete|15
293`LWG3388 <https://wg21.link/LWG3388>`__``view``\ iterator types have ill-formed ``<=>``\ operators2020-02 (Prague)|Complete|16
294`LWG3389 <https://wg21.link/LWG3389>`__A move-only iterator still does not have a ``counted_iterator``\ 2020-02 (Prague)|Complete|15
295`LWG3390 <https://wg21.link/LWG3390>`__``make_move_iterator()``\ cannot be used to construct a ``move_iterator``\ for a move-only iterator2020-02 (Prague)|Complete|14
296`LWG3393 <https://wg21.link/LWG3393>`__Missing/incorrect feature test macro for coroutines2020-02 (Prague)|Complete|14
297`LWG3395 <https://wg21.link/LWG3395>`__LWG3395: Definition for three-way comparison needs to be updated (US 152)2020-02 (Prague)|Nothing To Do|
298`LWG3396 <https://wg21.link/LWG3396>`__Clarify point of reference for ``source_location::current()``\ (DE 169)2020-02 (Prague)|Nothing To Do|16
299`LWG3397 <https://wg21.link/LWG3397>`__``ranges::basic_istream_view::iterator``\ should not provide ``iterator_category``\ 2020-02 (Prague)|Complete|16
300`LWG3398 <https://wg21.link/LWG3398>`__``tuple_element_t``\ is also wrong for ``const subrange``\ 2020-02 (Prague)|Complete|14
301
302`LWG3446 <https://wg21.link/LWG3446>`__``indirectly_readable_traits``\ ambiguity for types with both ``value_type``\ and ``element_type``\ 2020-11 (Virtual)|Complete|13