C++ Standard Library Issues List (Revision R110)

Table of Contents

Reference ISO/IEC IS 14882:2011(E)

This document is the Table of Contents for the Library Active Issues List, Library Defect Reports List, and Library Closed Issues List.

Revised 2018-05-06 at 19:13:12 UTC

Priority 0 (1 issues)

Issue Status Section Title Proposed Resolution Priority Duplicates
3040 Open 24.4.2.6 [string.view.ops] basic_string_view::starts_with Effects are incorrect Yes 0

Priority 1 (2 issues)

Issue Status Section Title Proposed Resolution Priority Duplicates
2892 New 20.5.5.6 [constexpr.functions] Relax the prohibition on libraries adding constexpr Yes 1
3101 New 26.7.3.2 [span.cons] span's Container constructors need another constraint Yes 1

Priority 2 (54 issues)

Issue Status Section Title Proposed Resolution Priority Duplicates
3092 New 20.4.2.1.4 [bitmask.types] Unclear semantics of enum class bitmask types Yes 2
2818 New 20.5.1.1 [contents] "::std::" everywhere rule needs tweaking No 2
2146 Open 20.5.3.1 [utility.arg.requirements] Are reference types Copy/Move-Constructible/Assignable or Destructible? No 2
2563 New 20.5.5.5 [member.functions] LWG 2259 relaxes requirements, perhaps unintentionally No 2
2839 Open 20.5.5.15 [lib.types.movedfrom] Self-move-assignment of library types, again Yes 2
2860 Core 21.6.4 [ptr.launder] launder and base class subobjects Yes 2
2859 Core 21.6.4 [ptr.launder] Definition of reachable in [ptr.launder] misses pointer arithmetic from pointer-interconvertible object Yes 2
2432 EWG 21.9 [support.initlist] initializer_list assignability Yes 2
3011 Open 22.3 [assertions] Requirements for assert(E) inconsistent with C No 2
2153 LEWG 23.2.2 [utility.swap] Narrowing of the non-member swap contract Yes 2
2899 Open 23.5 [tuple] is_(nothrow_)move_constructible and tuple, optional and unique_ptr Yes 2
2825 LEWG 23.6.3 [optional.optional] LWG 2756 breaks class template argument deduction for optional No 2
2829 New 23.6.3.5 [optional.observe] LWG 2740 leaves behind vacuous words No 2
2833 Open 23.7.3.1 [variant.ctor] Library needs to specify what it means when it declares a function constexpr Yes 2
2089 EWG 23.10.10.1 [allocator.members] std::allocator::construct should use uniform initialization Yes 2
3054 New 23.10.11.4 [uninitialized.copy] uninitialized_copy appears to not be able to meet its exception-safety guarantee Yes 2
2776 New 23.11.3.5 [util.smartptr.shared.obs] shared_ptr unique() and use_count() No 2
3008 New 23.11.3.6 [util.smartptr.shared.create] make_shared (sub)object destruction semantics are not specified Yes 2
3037 New 23.12.3 [mem.poly.allocator.class] polymorphic_allocator and incomplete types Yes 2
3038 New 23.12.3.2 [mem.poly.allocator.mem] polymorphic_allocator::allocate should not allow integer overflow to create vulnerabilities Yes 2
2813 Open 23.14.13.2.1 [func.wrap.func.con] std::function should not return dangling references Yes 2
2797 Open 23.15.2 [meta.type.synop] Trait precondition violations Yes 2
2939 New 23.15.2 [meta.type.synop] Some type-completeness constraints of traits are overspecified No 2
3022 New 23.15.6 [meta.rel] is_convertible<derived*, base*> may lead to ODR No 2
3091 New 23.17.9.5 [time.tod.subsecond] subsecond-precision time_of_day and durations that seconds cannot convert to No 2
3082 New 23.20.3 [charconv.from.chars] from_chars specification regarding floating point rounding is inconsistent Yes 2
3085 New 24.2.1 [char.traits.require] char_traits::copy precondition too weak Yes 2
2836 New 24.3.2 [basic.string] More string operations should be noexcept Yes 2
2780 LEWG 24.4 [string.view] basic_string_view::copy is missing constexpr Yes 2
2938 New 24.4.2 [string.view.template] basic_string_view::const_iterator should be literal types Yes 2
2381 Open 25.4.2.1.2 [facet.num.get.virtuals] Inconsistency in parsing floating point numbers Yes 2
2307 Open 26 [containers] Should the Standard Library use explicit only when necessary? No 2
2321 Open 26.2.1 [container.requirements.general] Moving containers should (usually) be required to preserve iterators Yes 2
2897 Open 26.3.7.1 [array.overview] array::iterator and array::const_iterator should be literal types Yes 2
2158 Open 26.3.11.3 [vector.capacity] Conditional copy/move in std::vector Yes 2
3025 New 26.4.4.1 [map.overview] Map-like container deduction guides should use pair<Key, T>, not pair<const Key, T> Yes 2
484 Open 27.2.3 [input.iterators] Convertible to T No 2
2962 New 27.2.3 [input.iterators] Iterators of Containers of move-only types do not model InputIterator Yes 2
3031 New 28.7 [alg.sorting] Algorithms and predicates with non-const reference arguments No 2
2352 New 29.6.7.1 [rand.util.seedseq] Is a default-constructed std::seed_seq intended to produce a predictable .generate()? No 2
2524 Open 29.6.8.4.2 [rand.dist.pois.exp] generate_canonical can occasionally return 1.0 No 2
2499 Open 30.7.4.2.3 [istream.extractors] operator>>(basic_istream&, CharT*) makes it hard to avoid buffer overflows Yes 2
2943 Open 30.9.2.3 [filebuf.members] Problematic specification of the wide version of basic_filebuf::open Yes 2
2936 Review 30.11.7.4.8 [fs.path.compare] Path comparison is defined in terms of the generic format Yes 2
3065 New 30.11.7.7 [fs.path.nonmember] LWG 2989 missed that all path's other operators should be hidden friends as well Yes 2
2840 Open 30.11.12.1 [fs.dir.itr.members] directory_iterator::increment is seemingly narrow-contract but marked noexcept Yes 2
2708 Review 30.11.13.1 [fs.rec.dir.itr.members] recursive_directory_iterator::recursion_pending() is incorrectly specified Yes 2
2682 Review 30.11.14.3 [fs.op.copy] filesystem::copy() won't create a symlink to a directory Yes 2
2220 New 31.12.2.2 [re.tokiter.comp] Under-specification of operator== for regex_token_iterator No 2
3012 Open 32.6 [atomics.types.generic] atomic<T> is unimplementable for non-is_trivially_copy_constructible T Yes 2
2363 Open 33.4.3.5.1 [thread.sharedtimedmutex.class] Defect in 30.4.1.4.1 [thread.sharedtimedmutex.class] Yes 2
3003 Open 33.6.6 [futures.promise] <future> still has type-erased allocators in promise Yes 2
2697 Review 99 [concurr.ts::futures.unique_future] [concurr.ts] Behavior of future/shared_future unwrapping constructor when given an invalid future Yes 2
2960 New 99 [fund.ts.v2::meta] [fund.ts.v2] nonesuch is insufficiently useless Yes 2

Priority 3 (147 issues)

Issue Status Section Title Proposed Resolution Priority Duplicates
2506 SG1 6.8.2 [intro.multithread] Underspecification of atomics No 3
2392 New 20.3.16 [defns.ntcts] "character type" is used but not defined No 3
2136 Open 20.4.1 [structure] Postconditions vs. exceptions No 3
2292 New 20.4.1.4 [structure.specifications] Find a better phrasing for "shall not participate in overload resolution" No 3
2152 LEWG 20.5.3.2 [swappable.requirements] Instances of standard container types are not swappable Yes 3
2114 Open 20.5.3.3 [nullablepointer.requirements] Incorrect "contextually convertible to bool" requirements Yes 3
2461 New 20.5.3.5 [allocator.requirements] Interaction between allocators and container exception safety guarantees No 3
3044 New 20.5.3.5 [allocator.requirements] Strange specification of max_size() for an allocator No 3
2695 New 20.5.5.5 [member.functions] "As if" unclear in [member.functions] No 3
2414 Open 20.5.5.8 [reentrancy] Member function reentrancy should be implementation-defined Yes 3
2730 Open 21.3.4 [numeric.limits] numeric_limits primary template definition No 3
2820 Open 21.4 [cstdint] Clarify <cstdint> macros Yes 3
2815 New 21.5 [support.start.term] quick_exit can deadlock Yes 3
3084 New 21.5 [support.start.term] Termination in C++ is unclear No 3
2737 New 21.6.2.1 [new.delete.single] Consider relaxing object size restrictions for single-object allocation functions No 3
2303 New 21.6.2.3 [new.delete.placement] Explicit instantiation of std::vector<UserType> broken? No 3
2508 New 21.6.2.4 [new.delete.dataraces] §[new.delete.dataraces] wording needs to be updated No 3
2398 Open 21.7.2 [type.info] type_info's destructor shouldn't be required to be virtual Yes 3
2088 Open 21.8.4 [exception.terminate] std::terminate problem No 3
2453 New 21.9 [support.initlist] §[iterator.range] and now [iterator.container] aren't available via <initializer_list> No 3
3019 New 22.5.2.4 [syserr.errcat.derived] Presentation of "program defined classes derived from error_category" [syserr.errcat.derived] unclear and contains mistakes No 3
2800 Open 23.2.2 [utility.swap] constexpr swap No 3
2599 New 23.2.6 [declval] Library incomplete type permission phrase is unclear No 3
2289 Open 23.4.2 [pairs.pair] constexpr guarantees of defaulted functions still insufficient Yes 3
2766 New 23.4.3 [pairs.spec] Swapping non-swappable types Yes 3
2528 New 23.5.3.1 [tuple.cnstr] Order of std::tuple construction unspecified No 3
2933 New 23.5.3.4 [tuple.creation] PR for LWG 2773 could be clearer Yes 3
2472 New 23.5.3.8 [tuple.rel] Heterogeneous comparisons in the standard library can result in ambiguities No 3
3016 New 23.6.3 [optional.optional] optional and over-aligned types Yes 3
2990 Open 23.6.3 [optional.optional] optional::value_type is not always a value type Yes 3
2746 New 23.6.3 [optional.optional] Inconsistency between requirements for emplace between optional and variant No 3
2811 New 23.6.3.1 [optional.ctor] "Selected constructor" wording is incorrect for optional/variant/any No 3
2881 New 23.7.3 [variant.variant] Adopt section III of P0308R0 No 3
2348 Open 23.9.2 [template.bitset] charT('1') is not the wide equivalent of '1' Yes 3
2421 New 23.10.6 [ptr.align] Non-specification of handling zero size in std::align [ptr.align] No 3
3063 New 23.10.11 [specialized.algorithms] Parallel algorithms in <memory> are underspecified No 3
3064 New 23.10.11 [specialized.algorithms] How do uninitialized memory algorithms obtain pointer without undefined behavior? No 3
2262 Open 23.11.1.2 [unique.ptr.single] Requirement for unique_ptr<T>::get_deleter()(p) to be able to destroy the unique_ptr Yes 3
2762 LEWG 23.11.1.2.4 [unique.ptr.single.observers] unique_ptr operator*() should be noexcept Yes 3
2594 New 23.11.3 [util.smartptr.shared] Contradicting definition of empty shared_ptr on shared_ptr(nullptr, d) Yes 3
3018 New 23.11.3 [util.smartptr.shared] shared_ptr of function type Yes 3
2906 New 23.11.3.1 [util.smartptr.shared.const] There is no ability to supply an allocator for the control block when constructing a shared_ptr from a unique_ptr No 3
3036 New 23.12.3 [mem.poly.allocator.class] polymorphic_allocator::destroy is extraneous Yes 3
2848 New 23.12.5.2 [mem.res.pool.options] Pass-through threshold for pool allocator No 3
2511 New 23.13.4 [allocator.adaptor.members] scoped_allocator_adaptor piecewise construction does not require CopyConstructible No 3
2894 Open 23.14.4 [func.invoke] The function template std::apply() is required to be constexpr, but std::invoke() isn't Yes 3
3046 New 23.14.5 [refwrap] Do not require reference_wrapper to support non-referenceable function types Yes 3
2491 New 23.14.7 [comparisons] std::less<T*> in constant expression Yes 3
2547 New 23.14.7 [comparisons] Container requirements (and other library text) should say "strict total order", not just "total order" No 3
2957 New 23.14.11.3 [func.bind.bind] bind's specification doesn't apply the cv-qualification of the call wrapper to the callable object Yes 3
3023 New 23.14.12 [func.memfn] Clarify unspecified call wrappers Yes 3
2774 New 23.14.13.2.1 [func.wrap.func.con] std::function construction vs assignment No 3
2290 Open 23.15 [meta] Top-level "SFINAE"-based constraints should get a separate definition in Clause 17 Yes 3
2452 Core 23.15 [meta] is_constructible, etc. and default arguments No 3
2845 New 23.15.1 [meta.rqmts] enable_if, result_of, common_type and aligned_storage do not meet the definition of TransformationTrait No 3
2077 Open 23.15.4.3 [meta.unary.prop] Further incomplete constraints for type traits No 3
2827 New 23.15.4.3 [meta.unary.prop] is_trivially_constructible and non-trivial destructors No 3
2116 Open 23.15.4.3 [meta.unary.prop] is_nothrow_constructible and destructors No 3
2358 Open 23.15.4.3 [meta.unary.prop] Apparently-bogus definition of is_empty type trait Yes 3
2496 New 23.15.4.3 [meta.unary.prop] Certain hard-to-avoid errors not in the immediate context are not allowed to be triggered by the evaluation of type traits No 3
2383 Open 23.17.5.8 [time.duration.literals] Overflow cannot be ill-formed for chrono::duration integer literals No 3
2841 New 24 [strings] Use of "Equivalent to" in [strings] No 3
2994 New 24.2 [char.traits] Needless UB for basic_string and basic_string_view Yes 3
2959 New 24.2.3.2 [char.traits.specializations.char16_t] char_traits<char16_t>::eof is a valid UTF-16 code unit No 3
2151 Open 24.3.2.1 [string.require] basic_string<>::swap semantics ignore allocators No 3
2929 New 24.3.2.6.3 [string.assign] basic_string misuses "Effects: Equivalent to" Yes 3
2238 Open 24.5 [c.strings] Problematic iterator-pair constructor of containers No 3
2295 New 25.3.1.2 [locale.cons] Locale name when the provided Facet is a nullptr No 3
2702 New 25.4.2.2.2 [facet.num.put.virtuals] num_put::do_put(..., bool) performs ill-formed do_put call No 3
2117 Open 25.4.2.2.2 [facet.num.put.virtuals] ios_base manipulators should have showgrouping/noshowgrouping No 3
2703 New 25.4.2.2.2 [facet.num.put.virtuals] No provision for fill-padding when boolalpha is set No 3
2983 New 25.4.6.2.2 [locale.money.put.virtuals] money_put::do_put underspecified Yes 3
2691 New 25.4.6.3 [locale.moneypunct] money_base::space and do_put: U+0020 versus fill Yes 3
3059 New 26.2 [container.requirements] Wrong requirements for map-like associative container assignment? No 3
3028 New 26.2.1 [container.requirements.general] Container requirements tables should distinguish const and non-const variables Yes 3
2206 Open 26.2.3 [sequence.reqmts] Inaccuracy in initializer_list constructor requirements No 3
2705 New 26.2.3 [sequence.reqmts] Questionable precondition on Sequence containers a.assign(n, t) Yes 3
2743 New 26.2.4.1 [container.node.overview] p0083r3 node_handle private members missing "exposition only" comment No 3
2362 New 26.2.6 [associative.reqmts] unique, associative emplace() should not move/copy the mapped_type constructor arguments when no insertion happens No 3
2227 Open 26.2.6 [associative.reqmts] Stateful comparison objects in associative containers No 3
2844 New 26.2.6 [associative.reqmts] Stability of a_uniq.insert(i, j) No 3
2215 Open 26.2.6 [associative.reqmts] (unordered) associative container functors should be CopyConstructible Yes 3
1175 Open 26.2.7 [unord.req] unordered complexity Yes 3
2198 Open 26.2.7 [unord.req] max_load_factor(z) makes no strong guarantees, but bans useful behavior Yes 3
2189 Open 26.2.7.1 [unord.req.except] Throwing swap breaks unordered containers' state No 3
2335 New 26.3.7 [array] array<array<int, 3>, 4> should be layout-compatible with int[4][3] No 3
2823 Open 26.3.7.1 [array.overview] std::array initialization is still not permissive enough Yes 3
2157 Open 26.3.7.5 [array.zero] How does std::array<T,0> initialization work when T is not default-constructible? Yes 3
2997 New 26.3.10.5 [list.ops] LWG 491 and the specification of {forward_,}list::unique Yes 3
1422 Open 26.3.12 [vector.bool] vector<bool> iterators are not random access No 3
2713 New 26.5 [unord] More missing allocator-extended constructors for unordered containers Yes 3
3103 New 26.7.3.3 [span.sub] Errors in taking subview of span should be ill-formed where possible Yes 3
2375 New 27.2.1 [iterator.requirements.general] Is [iterator.requirements.general]/9 too broadly applied? No 3
2038 Open 27.2.4 [output.iterators] Missing definition for incrementable iterator No 3
2035 Open 27.2.4 [output.iterators] Output iterator requirements are broken Yes 3
2951 New 27.4.1 [iterator.traits] iterator_traits should SFINAE for void* and function pointers Yes 3
2931 Open 27.4.3 [iterator.operations] Missed optimization opportunity with single-argument std::next No 3
2595 New 27.5.1.1 [reverse.iterator] reverse_iterator::operator[]'s return type revisited Yes 3
2366 New 27.6.3 [istreambuf.iterator] istreambuf_iterator end-of-stream equality No 3
2457 New 27.7 [iterator.range] std::begin() and std::end() do not support multi-dimensional arrays correctly No 3
2963 New 28 [algorithms] Algorithms with underspecified iterator requirements No 3
3049 Open 28.3 [algorithms.requirements] Missing wording allowing algorithms to use copies of function objects as substitutes for their parameters Yes 3
2471 LEWG 28.6.1 [alg.copy] copy_n's number of InputIterator increments unspecified No 3
2267 New 28.7.1.4 [partial.sort.copy] partial_sort_copy underspecified for ranges of two different types No 3
2741 Open 28.7.4 [alg.partitions] is_partitioned requirements need updating Yes 3
3032 New 28.7.7 [alg.heap.operations] ValueSwappable requirement missing for push_heap and make_heap Yes 3
3029 Open 28.7.7.2 [pop.heap] pop_heap over-constrains input Yes 3
2693 New 29.5 [complex.numbers] constexpr for various std::complex arithmetic and value operators No 3
2714 New 29.5.6 [complex.ops] complex stream extraction underspecified Yes 3
2846 New 29.5.9 [cmplx.over] Undefined phrase "effectively cast" No 3
2847 New 29.9.1 [cmath.syn] sin(float) should call sinf(float) No 3
2675 New 30.5.3.6 [ios.base.callback] register_callback can fail No 3
2832 New 30.5.4.2 [fpos.operations] §[fpos.operations] strange requirement for P(i) No 3
2504 New 30.6.3 [streambuf] basic_streambuf is not an abstract class No 3
2349 Open 30.7.4.2.1 [istream.formatted.reqmts] Clarify input/output function rethrow behavior Yes 3
2498 New 30.7.4.5 [istream.rvalue] operator>>(basic_istream&&, T&&) returns basic_istream&, but should probably return basic_istream&& No 3
2497 New 30.7.5.1.3 [ostream::sentry] Use of uncaught_exception() No 3
2984 New 30.7.7 [ext.manip] put_money(99) is unnecessarily undefined Yes 3
2995 New 30.8.2.1 [stringbuf.cons] basic_stringbuf default constructor forbids it from using SSO capacity Yes 3
3006 New 30.8.2.1 [stringbuf.cons] Constructing a basic_stringbuf from a string — where does the allocator come from? No 3
3097 New 30.8.2.4 [stringbuf.virtuals] basic_stringbuf seekoff effects trigger undefined behavior and have contradictory returns No 3
2121 New 30.8.5.1 [stringstream.cons] app for string streams No 3
2947 New 30.11.9.1 [fs.enum.path.format] Clarify several filesystem terms No 3
3078 New 30.11.11 [fs.class.directory_entry] directory_entry, directory_iterator and recursive_directory_iterator perform needless path copies No 3
3056 New 30.11.14.4 [fs.op.copy_file] copy_file() copies which attributes? Yes 3
2490 New 31 [re] <regex> needs lots of noexcept No 3
2431 New 31.3 [re.req] Missing regular expression traits requirements No 3
2331 Open 31.5.1 [re.synopt] regex_constants::collate's effects are inaccurately summarized Yes 3
2338 Open 31.7 [re.traits] §[re.traits]/7 expects of locale facets something not guaranteed by [locale.facet]/4 Yes 3
2137 Open 31.8.2 [re.regex.assign] Misleadingly constrained post-condition in the presence of exceptions Yes 3
2195 Open 31.10 [re.results] Missing constructors for match_results Yes 3
2184 New 31.10.1 [re.results.const] Muddled allocator requirements for match_results assignments No 3
2183 New 31.10.1 [re.results.const] Muddled allocator requirements for match_results constructors No 3
2216 New 31.11.4 [re.alg.replace] regex_replace(basic_string) allocator handling No 3
2987 New 31.13 [re.grammar] Relationship between traits_inst.lookup_collatename and the regex FSM is underspecified with regards to ClassAtomCollatingElement No 3
3047 New 32.6.2 [atomics.types.int] atomic compound assignment operators can cause undefined behavior when corresponding fetch_meow members don't No 3
2819 New 33.2.5 [thread.req.lockable] Unspecified Return type: elements No 3
2999 New 33.2.6 [thread.decaycopy] §[thread.decaycopy] issue No 3
2731 Open 33.4.4.1 [thread.lock.guard] Existence of lock_guard<MutexTypes...>::mutex_type typedef unclear Yes 3
2530 Open 33.6.5 [futures.state] Clarify observable side effects of releasing a shared state No 3
2532 Open 33.6.6 [futures.promise] Satisfying a promise at thread exit Yes 3
2507 New D.18 [depr.locale.stdcvt] codecvt_mode should be a bitmask type No 3
2561 New 99 [fund.ts.v2::optional.object.swap] [fund.ts.v2] Incorrect exception specifications for 'swap' in C++ Extensions for Library Fundamentals No 3
2564 New 99 [fund.ts.v2::func.wrap.func] [fund.ts.v2] std::experimental::function constructors taking allocator arguments may throw exceptions Yes 3
2814 LEWG 99 [fund.ts.v2::func.wrap.func.con] [fund.ts.v2] to_array should take rvalue reference as well Yes 3
3021 New 16.2.2 [networking.ts::buffer.reqmts.constbuffersequence] [networking.ts] Relax pointer equivalence requirement for ConstBufferSequence Yes 3
3027 New 16.2.4 [networking.ts::buffer.reqmts.dynamicbuffer] [networking.ts] DynamicBuffer prepare exception specification Yes 3

Priority 4 (33 issues)

Issue Status Section Title Proposed Resolution Priority Duplicates
2949 New 20 [library] Unclear complexity requirements: space vs. time No 4
2248 New 21.3.4 [numeric.limits] numeric_limits::is_iec559 misnamed No 4
2493 New 21.9 [support.initlist] initializer_list supports incomplete classes No 4
2155 Open 21.11 [support.runtime] Macro __bool_true_false_are_defined should be removed Yes 4
2413 New 22.3 [assertions] assert macro is overconstrained No 4
2751 New 23.11.3.2 [util.smartptr.shared.dest] shared_ptr deleter not specified to observe expired weak_ptr instances No 4
2592 New 23.17.2 [time.syn] Require that chrono::duration_casts from smaller durations to larger durations do not overflow Yes 4
2513 New 24.1 [strings.general] Missing requirements for basic_string::value_type No 4
2318 New 24.3.2 [basic.string] basic_string's wording has confusing relics from the copy-on-write era No 4
2237 New 24.5 [c.strings] <cuchar> macros No 4
2512 Open 25.4.5.1.2 [locale.time.get.virtuals] Y2K bites; what is an "unambiguous year identifier"? No 4
2269 New 26.2.1 [container.requirements.general] Container iterators and argument-dependent lookup No 4
1213 Open 27.2 [iterator.requirements] Meaning of valid and singular iterator underspecified No 4
2858 New 27.5.1 [reverse.iterators] LWG 2472: actually an incompatibility with C++03 Yes 4
2173 New 28 [algorithms] The meaning of operator + in the description of the algorithms Yes 4
2154 New 29.6.1.3 [rand.req.urng] What exactly does compile-time complexity imply? No 4
2423 New 29.7.5 [template.slice.array] Missing specification slice_array, gslice_array, mask_array, indirect_array copy constructor Yes 4
2115 Open 29.7.8 [template.mask.array] Undefined behaviour for valarray assignments with mask_array index? No 4
2923 New 29.9.1 [cmath.syn] noexcept is inconsistently applied across headers which import components of the C standard library No 4
2808 New 30.5.4.2 [fpos.operations] Requirements for fpos and stateT No 4
2214 Open 30.5.5.2 [basic.ios.cons] Clarify basic_ios::init call restrictions Yes 4
2342 New 30.7.5.1 [ostream] User conversion to wchar_t const* or to wchar_t not invoked for operator<< Yes 4
2286 New 30.8.2.4 [stringbuf.virtuals] stringbuf::underflow() underspecified Yes 4
2191 New 31.10.1 [re.results.const] Incorrect specification of match_results(match_results&&) No 4
2546 New 31.13 [re.grammar] Implementability of locale-sensitive UnicodeEscapeSequence matching No 4
2986 New 31.13 [re.grammar] Handling of multi-character collating elements by the regex FSM is underspecified No 4
2265 Open 32.4 [atomics.order] 29.3p9 appears to rule out some acceptable executions No 4
2095 LEWG 33.6.6 [futures.promise] promise and packaged_task missing constructors needed for uses-allocator construction Yes 4
2202 Deferred 33.6.9 [futures.async] Missing allocator support by async No 4
2481 New D.19.1 [depr.conversions.string] wstring_convert should be more precise regarding "byte-error string" etc. No 4
2478 New D.19.1 [depr.conversions.string] Unclear how wstring_convert uses cvtstate No 4
2479 New D.19.2 [depr.conversions.buffer] Unclear how wbuffer_convert uses cvtstate No 4
2480 New D.19.2 [depr.conversions.buffer] Error handling of wbuffer_convert unclear No 4

Not Prioritized (78 issues)

Issue Status Section Title Proposed Resolution Priority Duplicates
3105 New 20 [library] T1 is convertible to T2 No
3106 New 21.6.1 [new.syn] nothrow should be inline constexpr rather that extern const Yes
3086 New 21.6.2.1 [new.delete.single] Possible problem in §[new.delete.single] Yes
3053 New 22.5.3.1 [syserr.errcode.overview] Prohibit error_code construction from rvalues of error_category Yes
1289 LEWG 23.2 [utility] Generic casting requirements for smart pointers Yes
2419 LEWG 23.5.3.1 [tuple.cnstr] Clang's libc++ extension to std::tuple No
1201 LEWG 23.5.3.4 [tuple.creation] Do we always want to unwrap ref-wrappers in make_tuple Yes
532 LEWG 23.5.3.8 [tuple.rel] Tuple comparison Yes 348
2991 LEWG 23.7.3.1 [variant.ctor] variant copy constructor missing noexcept(see below) Yes
3069 New 23.7.3.3 [variant.assign] Move assigning variant's subobject corrupts data Yes
3052 New 23.7.7 [variant.visit] visit is underconstrained Yes
1406 LEWG 23.11.3 [util.smartptr.shared] Support hashing smart-pointers based on owner Yes
2996 LEWG 23.11.3 [util.smartptr.shared] Missing rvalue overloads for shared_ptr operations Yes
2690 LEWG 23.14.4 [func.invoke] invoke<R> Yes
1025 LEWG 23.14.15 [unord.hash] The library should provide more specializations for std::hash No
1317 LEWG 23.14.15 [unord.hash] make_hash Yes
2040 LEWG 23.15 [meta] Missing type traits related to is_convertible Yes
2922 LEWG 23.15.2 [meta.type.synop] The *_constant<> templates do not make use of template<auto> No
3099 New 23.15.2 [meta.type.synop] is_assignable<Incomplete&, Incomplete&> Yes
1121 LEWG 23.16.4 [ratio.arithmetic] Support for multiple arguments Yes
3050 New 23.17.5.1 [time.duration.cons] Conversion specification problem in chrono::duration constructor Yes
3090 New 23.17.5.1 [time.duration.cons] What is §[time.duration.cons]p4's "no overflow is induced in the conversion" intended to mean? No
935 LEWG 23.17.7 [time.clock] clock error handling needs to be specified Yes
3081 New 23.20.3 [charconv.from.chars] Floating point from_chars API does not distinguish between overflow and underflow Yes
2883 LEWG 24.4 [string.view] The standard library should provide string_view parameters instead or in addition for functions defined with char const * or string const & as parameter types. No
3068 New 24.4.2 [string.view.template] Forbid assigning an rvalue basic_string to basic_string_view Yes
708 LEWG 25 [localization] Locales need to be per thread and updated for POSIX changes No
2885 LEWG 26 [containers] The relational operators of optional and variant completely reflect the semantics of the element types — this is inconsistent with other types in the library No
2884 LEWG 26 [containers] Relational operators for containers should sfinae; if the underlying type is not comparable, neither should the container be No
1242 LEWG 26 [containers] Enable SCARY iterators Yes
1521 LEWG 26.2.1 [container.requirements.general] Requirements on internal pointer representations in containers Yes
1188 LEWG 26.2.7 [unord.req] Unordered containers should have a minimum load factor as well as a maximum Yes
3088 New 26.3.9.6 [forwardlist.ops] forward_list::merge behavior unclear when passed *this Yes
3087 New 26.3.10.5 [list.ops] One final &x in §[list.ops] Yes
3077 New 26.3.11.5 [vector.modifiers] (push|emplace)_back should invalidate the end iterator Yes
3107 New 27.6.3 [istreambuf.iterator] istreambuf_iterator has public exposition-only member Yes
3108 New 27.6.3.1 [istreambuf.iterator.proxy] istreambuf_iterator::proxy::operator* should be const Yes
1238 LEWG 28 [algorithms] defining algorithms taking iterator for range No
1282 LEWG 28 [algorithms] A proposal to add std::split algorithm Yes
3089 New 28.6.1 [alg.copy] copy_n should require non-overlapping ranges Yes
2985 LEWG 28.6.10 [alg.reverse] std::reverse should be permitted to be vectorized Yes
2973 LEWG 28.7.5 [alg.merge] inplace_merge exact comparison count complexity prohibits useful real-world optimizations Yes
3061 New 28.7.11 [alg.3way] What is the return type of compare_3way? Yes
1217 LEWG 29.5 [complex.numbers] Quaternion support No
1154 LEWG 29.5 [complex.numbers] complex should accept integral types Yes
1235 LEWG 29.6.1.6 [rand.req.dist] Issue with C++0x random number proposal No
3060 New 29.8.7 [exclusive.scan] XXX_scan algorithms are specified to work with move-only T, but are specified to make N copies of T into the destination range No
3093 New 29.9.2 [c.math.abs] LWG 2294/2192 missed a std::abs overload No
3066 New 29.9.5 [sf.cmath] "report a domain error" in [sf.cmath]/1 is underspecified No
423 LEWG 30 [input.output] effects of negative streamsize in iostreams Yes
2600 LEWG 30.5.3.5 [ios.base.storage] ios_base must store inaccessible iostate flags No
1203 LEWG 30.7.5.5 [ostream.rvalue] More useful rvalue stream insertion Yes
1150 LEWG 30.9.5 [fstream] wchar_t, char16_t and char32_t filenames No
3055 New 30.11.7.4.4 [fs.path.concat] path::operator+=(single-character) misspecified Yes
3098 New 30.11.7.4.9 [fs.path.decompose] Misleading example for filesystem::path::filename() Yes
3070 New 30.11.7.4.11 [fs.path.gen] path::lexically_relative causes surprising results if a filename can also be a root-name Yes
3096 New 30.11.7.4.11 [fs.path.gen] path::lexically_relative is confused by trailing slashes Yes
3057 New 30.11.14.3 [fs.op.copy] Correct copy_options handling Yes
523 LEWG 31 [re] regex case-insensitive character ranges are unimplementable as specified No
1396 LEWG 31.8 [re.regex] regex should support allocators No 1451
2236 SG1 32.2 [atomics.syn] kill_dependency unconditionally noexcept No
1459 LEWG 32.4 [atomics.order] Overlapping evaluations are allowed No 1458
2334 SG1 32.6.1 [atomics.types.operations] atomic's default constructor requires "uninitialized" state even for types with non-trivial default-constructor Yes
1484 LEWG 33.3.2 [thread.thread.class] Need a way to join a thread with a timeout No
1488 LEWG 33.4 [thread.mutex] Improve interoperability between the C++0x and C1x threads APIs No
936 LEWG 33.4.3 [thread.mutex.requirements] Mutex type overspecified No 961
961 LEWG 33.4.3 [thread.mutex.requirements] Various threading bugs #11 No 936
1493 LEWG 33.4.3 [thread.mutex.requirements] Add mutex, recursive_mutex, is_locked function No
1499 LEWG 33.5 [thread.condition] Condition variables preclude wakeup optimization No
2412 Review 33.6.6 [futures.promise] promise::set_value() and promise::get_future() should not race Yes
1052 LEWG 99 [reverse.iter.opref] reverse_iterator::operator-> should also support smart pointers Yes 2775
3109 New D.7.2 [depr.strstreambuf] strstreambuf is copyable No
3095 New D.7.2.3 [depr.strstreambuf.virtuals] strstreambuf refers to nonexistent member of fpos, fpos::offset Yes
2226 LEWG D.19.1 [depr.conversions.string] wstring_convert methods do not take allocator instance Yes
2533 SG1 99 [concurr.ts::futures.unique_future] [concurr.ts] Constrain threads where future::then can run a continuation No
2417 LEWG 99 [fund.ts.v2::optional.relops] [fund.ts.v2] std::experimental::optional::operator< and LessThanComparable requirement No
3072 New 16.2.4 [networking.ts::buffer.reqmts.dynamicbuffer] [networking.ts] DynamicBuffer object lifetimes underspecified Yes
3073 New 17 [networking.ts::buffer.stream] [networking.ts] (async_)read and (async_)write don't support DynamicBuffer lvalues Yes