| Issue |
Status |
Section |
Title |
Proposed Resolution |
Priority |
Duplicates |
| 3105 |
New |
16 [library] |
T1 is convertible to T2 |
No |
3 |
|
| 2949 |
New |
16 [library] |
Unclear complexity requirements: space vs. time |
No |
4 |
|
| 2392 |
New |
16.3.18 [defns.ntcts] |
"character type" is used but not defined |
No |
3 |
|
| 2136 |
Open |
16.4.1 [structure] |
Postconditions vs. exceptions |
No |
3 |
|
| 3193 |
New |
16.4.1.4 [structure.specifications] |
Mandates: and Expects: elements are not defined for types |
Yes |
3 |
|
| 3401 |
New |
16.4.1.4 [structure.specifications] |
Is "as if by" equivalent to "equivalent to"? |
No |
3 |
|
| 3168 |
Open |
16.4.1.4 [structure.specifications] |
Expects: element should be specified in one place |
Yes |
2 |
|
| 3092 |
Open |
16.4.2.2.4 [bitmask.types] |
Unclear semantics of enum class bitmask types |
Yes |
3 |
|
| 2818 |
Open |
16.5.1.1 [contents] |
"::std::" everywhere rule needs tweaking |
Yes |
2 |
|
| 3240 |
New |
16.5.2.2 [using.headers] |
Headers declare more than entities |
No |
3 |
|
| 2146 |
Open |
16.5.3.1 [utility.arg.requirements] |
Are reference types Copy/Move-Constructible/Assignable or Destructible? |
No |
2 |
|
| 2152 |
LEWG |
16.5.3.2 [swappable.requirements] |
Instances of standard container types are not swappable |
Yes |
3 |
|
| 2114 |
Open |
16.5.3.3 [nullablepointer.requirements] |
Incorrect "contextually convertible to bool" requirements |
Yes |
3 |
|
| 3267 |
New |
16.5.3.5 [allocator.requirements] |
Rebound allocators and is_always_equal |
Yes |
4 |
|
| 3157 |
New |
16.5.3.5 [allocator.requirements] |
Allocator destroy and fancy pointer operations must be non-throwing |
Yes |
3 |
|
| 3044 |
New |
16.5.3.5 [allocator.requirements] |
Strange specification of max_size() for an allocator |
Yes |
3 |
|
| 2461 |
New |
16.5.3.5 [allocator.requirements] |
Interaction between allocators and container exception safety guarantees |
No |
3 |
|
| 3441 |
New |
16.5.4.2.1 [namespace.std] |
Misleading note about calls to customization points |
Yes |
|
|
| 3442 |
New |
16.5.4.2.1 [namespace.std] |
Unsatisfiable suggested implementation of customization points |
Yes |
|
|
| 3177 |
New |
16.5.4.2.1 [namespace.std] |
Limit permission to specialize variable templates to program-defined types |
Yes |
3 |
|
| 3142 |
New |
16.5.4.8 [res.on.functions] |
std::foo<incomplete> should be ill-formed NDR |
Yes |
3 |
|
| 3429 |
New |
16.5.4.12 [res.on.requirements] |
"models" should subsume like "satisfies" |
Yes |
3 |
|
| 2695 |
New |
16.5.5.5 [member.functions] |
"As if" unclear in [member.functions] |
No |
3 |
|
| 2414 |
Open |
16.5.5.9 [reentrancy] |
Member function reentrancy should be implementation-defined |
Yes |
3 |
|
| 3229 |
New |
16.5.5.13 [res.on.exception.handling] |
§[res.on.exception.handling]#3 cannot apply to types with implicitly declared destructors |
Yes |
3 |
|
| 2839 |
Open |
16.5.5.16 [lib.types.movedfrom] |
Self-move-assignment of library types, again |
Yes |
2 |
|
| Issue |
Status |
Section |
Title |
Proposed Resolution |
Priority |
Duplicates |
| 2153 |
LEWG |
20.2.2 [utility.swap] |
Narrowing of the non-member swap contract |
Yes |
2 |
|
| 2599 |
New |
20.2.6 [declval] |
Library incomplete type permission phrase is unclear |
No |
3 |
|
| 3342 |
New |
20.4.2 [pairs.pair] |
Library wording uses "initializes x with y", which is underspecified |
No |
3 |
|
| 2289 |
Open |
20.4.2 [pairs.pair] |
constexpr guarantees of defaulted functions still insufficient |
No |
3 |
|
| 2766 |
New |
20.4.3 [pairs.spec] |
Swapping non-swappable types |
Yes |
3 |
|
| 3166 |
New |
20.4.4 [pair.astuple] |
No such descriptive element as Value: |
No |
3 |
|
| 3378 |
New |
20.5.2 [tuple.syn] |
tuple_size_v/tuple_element_t should be available when tuple_size/tuple_element are |
Yes |
3 |
|
| 3440 |
Tentatively NAD |
20.5.3.1 [tuple.cnstr] |
Aggregate-paren-init breaks direct-initializing a tuple or optional from {aggregate-member-value} |
Yes |
2 |
|
| 2528 |
New |
20.5.3.1 [tuple.cnstr] |
Order of std::tuple construction unspecified |
No |
3 |
|
| 3155 |
Open |
20.5.3.1 [tuple.cnstr] |
tuple<any, any>{allocator_arg_t, an_allocator} |
Yes |
3 |
|
| 3121 |
Open |
20.5.3.1 [tuple.cnstr] |
tuple constructor constraints for UTypes&&... overloads |
Yes |
2 |
|
| 2933 |
New |
20.5.4 [tuple.creation] |
PR for LWG 2773 could be clearer |
Yes |
3 |
|
| 2472 |
New |
20.5.8 [tuple.rel] |
Heterogeneous comparisons in the standard library can result in ambiguities |
No |
3 |
|
| 532 |
LEWG |
20.5.8 [tuple.rel] |
Tuple comparison |
Yes |
|
348 |
| 2990 |
Open |
20.6.3 [optional.optional] |
optional::value_type is not always a value type |
Yes |
3 |
|
| 2825 |
Tentatively Resolved |
20.6.3 [optional.optional] |
LWG 2756 breaks class template argument deduction for optional |
No |
2 |
|
| 2811 |
New |
20.6.3.1 [optional.ctor] |
"Selected constructor" wording is incorrect for optional/variant/any |
Yes |
3 |
|
| 2746 |
New |
20.6.3.3 [optional.assign] |
Inconsistency between requirements for emplace between optional and variant |
Yes |
3 |
|
| 3424 |
New |
20.6.3.5 [optional.observe] |
optional::value_or should never return a cv-qualified type |
Yes |
3 |
|
| 2829 |
Open |
20.6.3.5 [optional.observe] |
LWG 2740 leaves behind vacuous words |
No |
2 |
|
| 2881 |
New |
20.7.3 [variant.variant] |
Adopt section III of P0308R0 |
No |
3 |
|
| 3215 |
New |
20.7.3.1 [variant.ctor] |
variant default constructor has vague constexpr requirements |
No |
2 |
|
| 2833 |
Open |
20.7.3.1 [variant.ctor] |
Library needs to specify what it means when it declares a function constexpr |
Yes |
2 |
|
| 2991 |
LEWG |
20.7.3.1 [variant.ctor] |
variant copy constructor missing noexcept(see below) |
Yes |
|
|
| 3228 |
Tentatively Resolved |
20.7.3.1 [variant.ctor] |
Surprising variant construction |
No |
2 |
|
| 3069 |
New |
20.7.3.3 [variant.assign] |
Move assigning variant's subobject corrupts data |
Yes |
3 |
|
| 3052 |
LEWG |
20.7.7 [variant.visit] |
visit is underconstrained |
Yes |
2 |
|
| 3416 |
New |
20.8.3 [any.class] |
The Throws: specification of std::any does not mention allocation |
No |
3 |
|
| 3423 |
New |
20.8.4 [any.nonmembers] |
std::any_cast should never return a cv-qualified type |
Yes |
3 |
|
| 3305 |
Open |
20.8.4 [any.nonmembers] |
any_cast<void> |
Yes |
2 |
|
| 2348 |
Open |
20.9.2 [template.bitset] |
charT('1') is not the wide equivalent of '1' |
Yes |
3 |
|
| 3454 |
New |
20.10.3 [pointer.traits] |
pointer_traits::pointer_to should be constexpr |
Yes |
|
|
| 2421 |
New |
20.10.6 [ptr.align] |
Non-specification of handling zero size in std::align [ptr.align] |
No |
3 |
|
| 3192 |
New |
20.10.8.2 [allocator.uses.construction] |
§[allocator.uses.construction] functions misbehave for const types |
Yes |
3 |
|
| 3170 |
Open |
20.10.10 [default.allocator] |
is_always_equal added to std::allocator makes the standard library treat
derived types as always equal |
Yes |
2 |
|
| 3159 |
New |
20.11.1.2 [unique.ptr.single] |
§[unique.ptr.single] requirements on deleter may be too strict |
No |
3 |
|
| 2262 |
Open |
20.11.1.2 [unique.ptr.single] |
Requirement for unique_ptr<T>::get_deleter()(p) to be able to destroy the unique_ptr |
Yes |
3 |
|
| 3455 |
Tentatively Ready |
20.11.1.2.3 [unique.ptr.single.asgn] |
Incorrect Postconditions on unique_ptr move assignment |
Yes |
0 |
|
| 2762 |
Open |
20.11.1.2.4 [unique.ptr.single.observers] |
unique_ptr operator*() should be noexcept |
Yes |
3 |
|
| 3426 |
Tentatively Ready |
20.11.1.5 [unique.ptr.special] |
operator<=>(const unique_ptr<T, D>&, nullptr_t) can't get no satisfaction |
Yes |
0 |
|
| 2594 |
New |
20.11.3 [util.smartptr.shared] |
Contradicting definition of empty shared_ptr on shared_ptr(nullptr, d) |
Yes |
3 |
|
| 2906 |
New |
20.11.3.1 [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 |
|
| 2751 |
New |
20.11.3.2 [util.smartptr.shared.dest] |
shared_ptr deleter not specified to observe expired weak_ptr instances |
No |
4 |
|
| 3216 |
New |
20.11.3.6 [util.smartptr.shared.create] |
Rebinding the allocator before calling construct/destroy in allocate_shared |
Yes |
3 |
|
| 3210 |
New |
20.11.3.6 [util.smartptr.shared.create] |
allocate_shared is inconsistent about removing const from the pointer
passed to allocator construct and destroy |
Yes |
3 |
|
| 3427 |
Tentatively Ready |
20.11.3.7 [util.smartptr.shared.cmp] |
operator<=>(const shared_ptr<T>&, nullptr_t) definition ill-formed |
Yes |
0 |
|
| 3195 |
New |
20.11.4.1 [util.smartptr.weak.const] |
What is the stored pointer value of an empty weak_ptr? |
Yes |
2 |
|
| 3036 |
Open |
20.12.3 [mem.poly.allocator.class] |
polymorphic_allocator::destroy is extraneous |
Yes |
3 |
|
| 2848 |
New |
20.12.5.2 [mem.res.pool.options] |
Pass-through threshold for pool allocator |
No |
3 |
|
| 3143 |
New |
20.12.6 [mem.res.monotonic.buffer] |
monotonic_buffer_resource growth policy is unclear |
Yes |
2 |
|
| 3120 |
Open |
20.12.6.2 [mem.res.monotonic.buffer.mem] |
Unclear behavior of monotonic_buffer_resource::release() |
Yes |
2 |
|
| 2690 |
LEWG |
20.14.4 [func.invoke] |
invoke<R> |
Yes |
|
|
| 3046 |
New |
20.14.5 [refwrap] |
Do not require reference_wrapper to support non-referenceable function types |
Yes |
3 |
|
| 3146 |
New |
20.14.5.5 [refwrap.helpers] |
Excessive unwrapping in std::ref/cref |
Yes |
3 |
|
| 2491 |
New |
20.14.7 [comparisons] |
std::less<T*> in constant expression |
Yes |
3 |
|
| 2547 |
New |
20.14.7 [comparisons] |
Container requirements (and other library text) should say "strict total order", not just "total order" |
No |
3 |
|
| 2774 |
New |
20.14.16.2.1 [func.wrap.func.con] |
std::function construction vs assignment |
Yes |
3 |
|
| 2813 |
EWG |
20.14.16.2.1 [func.wrap.func.con] |
std::function should not return dangling references |
Yes |
2 |
|
| 1025 |
LEWG |
20.14.18 [unord.hash] |
The library should provide more specializations for std::hash |
No |
|
|
| 2290 |
Open |
20.15 [meta] |
Top-level "SFINAE"-based constraints should get a separate definition in Clause 17 |
Yes |
3 |
|
| 2452 |
Core |
20.15 [meta] |
is_constructible, etc. and default arguments |
No |
3 |
|
| 2845 |
New |
20.15.1 [meta.rqmts] |
enable_if, result_of, common_type and aligned_storage do not meet the definition
of TransformationTrait |
No |
3 |
|
| 2939 |
New |
20.15.2 [meta.type.synop] |
Some type-completeness constraints of traits are overspecified |
No |
2 |
|
| 3099 |
New |
20.15.2 [meta.type.synop] |
is_assignable<Incomplete&, Incomplete&> |
Yes |
2 |
|
| 2922 |
LEWG |
20.15.2 [meta.type.synop] |
The *_constant<> templates do not make use of template<auto> |
No |
|
|
| 2827 |
New |
20.15.4.3 [meta.unary.prop] |
is_trivially_constructible and non-trivial destructors |
No |
3 |
|
| 2496 |
New |
20.15.4.3 [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 |
|
| 2116 |
Open |
20.15.4.3 [meta.unary.prop] |
is_nothrow_constructible and destructors |
No |
3 |
|
| 2358 |
Open |
20.15.4.3 [meta.unary.prop] |
Apparently-bogus definition of is_empty type trait |
Yes |
3 |
|
| 2077 |
Open |
20.15.4.3 [meta.unary.prop] |
Further incomplete constraints for type traits |
No |
3 |
|
| 3400 |
New |
20.15.6 [meta.rel] |
Does is_nothrow_convertible consider destruction of the destination type? |
No |
3 |
|
| 3174 |
New |
20.15.6 [meta.rel] |
Precondition on is_convertible is too strong |
Yes |
3 |
|
| 3205 |
New |
20.15.7.6 [meta.trans.other] |
decay_t in the new common_type fallback should be remove_cvref_t |
Yes |
3 |
|
| 3152 |
New |
20.15.7.6 [meta.trans.other] |
common_type and common_reference have flaws in common |
Yes |
3 |
|
| 3456 |
New |
20.19.3 [charconv.from.chars] |
Pattern used by std::from_chars is underspecified |
Yes |
|
|
| 3081 |
Open |
20.19.3 [charconv.from.chars] |
Floating point from_chars API does not distinguish between overflow and underflow |
Yes |
2 |
|
| 3082 |
Open |
20.19.3 [charconv.from.chars] |
from_chars specification regarding floating point rounding is inconsistent |
Yes |
2 |
|
| 3412 |
New |
20.20.2.2 [format.string.std] |
§[format.string.std] references to "Unicode encoding" unclear |
No |
|
|
| 3462 |
New |
20.20.5.1 [formatter.requirements] |
§[formatter.requirements]: Formatter requirements forbid use of fc.arg() |
Yes |
|
|
| Issue |
Status |
Section |
Title |
Proposed Resolution |
Priority |
Duplicates |
| 2307 |
LEWG |
22 [containers] |
Should the Standard Library use explicit only when necessary? |
No |
2 |
|
| 2885 |
LEWG |
22 [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 |
22 [containers] |
Relational operators for containers should sfinae; if the underlying type is not comparable, neither should the container be |
No |
|
|
| 3059 |
New |
22.2 [container.requirements] |
Wrong requirements for map-like associative container assignment? |
No |
3 |
|
| 3028 |
New |
22.2.1 [container.requirements.general] |
Container requirements tables should distinguish const and non-const variables |
Yes |
3 |
|
| 3431 |
New |
22.2.1 [container.requirements.general] |
<=> for containers should require three_way_comparable<T> instead of <=> |
Yes |
2 |
|
| 2269 |
New |
22.2.1 [container.requirements.general] |
Container iterators and argument-dependent lookup |
No |
4 |
|
| 1521 |
Open |
22.2.1 [container.requirements.general] |
Requirements on internal pointer representations in containers |
Yes |
3 |
|
| 2321 |
Open |
22.2.1 [container.requirements.general] |
Moving containers should (usually) be required to preserve iterators |
Yes |
3 |
|
| 2705 |
New |
22.2.3 [sequence.reqmts] |
Questionable precondition on Sequence containers a.assign(n, t) |
Yes |
3 |
|
| 3297 |
New |
22.2.3 [sequence.reqmts] |
Useless sequence container requirement |
Yes |
3 |
|
| 2206 |
Open |
22.2.3 [sequence.reqmts] |
Inaccuracy in initializer_list constructor requirements |
Yes |
3 |
|
| 2743 |
Tentatively Ready |
22.2.4.1 [container.node.overview] |
p0083r3 node_handle private members missing "exposition only" comment |
Yes |
3 |
|
| 3438 |
New |
22.2.4.1 [container.node.overview] |
§[container.node.overview] missing multiset/map cases |
No |
3 |
|
| 3227 |
New |
22.2.6 [associative.reqmts] |
Ambiguity issue for extract in ordered and unordered associative containers |
Yes |
3 |
|
| 2362 |
New |
22.2.6 [associative.reqmts] |
unique, associative emplace() should not move/copy the mapped_type constructor
arguments when no insertion happens |
No |
3 |
|
| 2227 |
Open |
22.2.6 [associative.reqmts] |
Stateful comparison objects in associative containers |
No |
3 |
|
| 2844 |
Open |
22.2.6 [associative.reqmts] |
Stability of a_uniq.insert(i, j) |
No |
3 |
|
| 2215 |
Open |
22.2.6 [associative.reqmts] |
(unordered) associative container functors should be CopyConstructible |
Yes |
3 |
|
| 1175 |
Open |
22.2.7 [unord.req] |
unordered complexity |
Yes |
3 |
|
| 2198 |
Open |
22.2.7 [unord.req] |
max_load_factor(z) makes no strong guarantees, but bans useful behavior |
Yes |
3 |
|
| 2189 |
Open |
22.2.7.1 [unord.req.except] |
Throwing swap breaks unordered containers' state |
No |
3 |
|
| 2335 |
Tentatively NAD |
22.3.7 [array] |
array<array<int, 3>, 4> should be layout-compatible with int[4][3] |
No |
3 |
|
| 3219 |
New |
22.3.7.1 [array.overview] |
std::array overview container requirements are incorrect |
Yes |
3 |
|
| 2823 |
Open |
22.3.7.1 [array.overview] |
std::array initialization is still not permissive enough |
Yes |
3 |
|
| 2157 |
Open |
22.3.7.5 [array.zero] |
How does std::array<T,0> initialization work when T is not default-constructible? |
Yes |
3 |
|
| 3308 |
New |
22.3.8.4 [deque.modifiers] |
vector and deque iterator erase invalidates elements even when no change occurs |
Yes |
3 |
|
| 3088 |
New |
22.3.9.6 [forwardlist.ops] |
forward_list::merge behavior unclear when passed *this |
Yes |
3 |
|
| 2997 |
New |
22.3.10.5 [list.ops] |
LWG 491 and the specification of {forward_,}list::unique |
Yes |
3 |
|
| 1102 |
Open |
22.3.11.3 [vector.capacity] |
std::vector's reallocation policy still unclear |
Yes |
|
|
| 2158 |
Open |
22.3.11.3 [vector.capacity] |
Conditional copy/move in std::vector |
Yes |
3 |
|
| 1422 |
Open |
22.3.12 [vector.bool] |
vector<bool> iterators are not random access |
No |
3 |
|
| 2713 |
New |
22.5 [unord] |
More missing allocator-extended constructors for unordered containers |
Yes |
3 |
|
| 3189 |
New |
22.6.5 [priority.queue] |
Missing requirement for std::priority_queue |
No |
3 |
|
| 3161 |
Open |
22.6.6 [stack] |
Container adapters mandate use of emplace_back but don't require it |
Yes |
3 |
|
| 3203 |
New |
22.7.3.1 [span.overview] |
span element access invalidation |
Yes |
2 |
|
| Issue |
Status |
Section |
Title |
Proposed Resolution |
Priority |
Duplicates |
| 1213 |
Open |
23.3 [iterator.requirements] |
Meaning of valid and singular iterator underspecified |
No |
4 |
|
| 2375 |
New |
23.3.1 [iterator.requirements.general] |
Is [iterator.requirements.general]/9 too broadly applied? |
No |
3 |
|
| 3446 |
New |
23.3.2.2 [readable.traits] |
indirectly_readable_traits ambiguity for types with both value_type and element_type |
Yes |
|
|
| 3420 |
Tentatively Ready |
23.3.2.3 [iterator.traits] |
cpp17-iterator should check that the type looks like an iterator first |
Yes |
0 |
|
| 3283 |
New |
23.3.2.3 [iterator.traits] |
Types satisfying input_iterator but not equality_comparable look like
C++17 output iterators |
Yes |
2 |
|
| 3289 |
New |
23.3.2.3 [iterator.traits] |
Cannot opt out of C++17 iterator-ness without also opting out of C++20 iterator-ness |
Yes |
2 |
|
| 3287 |
New |
23.3.2.3 [iterator.traits] |
Exposition-only cpp17-input-iterator concept is needlessly complex |
Yes |
3 |
|
| 3376 |
New |
23.3.4.4 [iterator.concept.winc] |
"integer-like class type" is too restrictive |
No |
3 |
|
| 3366 |
New |
23.3.4.4 [iterator.concept.winc] |
Narrowing conversions between integer and integer-class types |
No |
3 |
|
| 2962 |
Open |
23.3.5.2 [input.iterators] |
Iterators of Containers of move-only types do not model InputIterator |
Yes |
2 |
|
| 484 |
Open |
23.3.5.2 [input.iterators] |
Convertible to T |
No |
2 |
|
| 2035 |
Open |
23.3.5.3 [output.iterators] |
Output iterator requirements are broken |
Yes |
3 |
|
| 2038 |
Open |
23.3.5.3 [output.iterators] |
Missing definition for incrementable iterator |
No |
3 |
|
| 3439 |
New |
23.4.2 [iterator.operations] |
"Distance" template parameter is underspecified |
No |
3 |
|
| 3344 |
New |
23.4.2 [iterator.operations] |
advance(i, most-negative) and prev(i, most-negative) |
Yes |
3 |
|
| 3197 |
New |
23.4.2 [iterator.operations] |
std::prev should not require BidirectionalIterator |
Yes |
3 |
|
| 2931 |
Open |
23.4.2 [iterator.operations] |
Missed optimization opportunity with single-argument std::next |
No |
3 |
|
| 3453 |
New |
23.4.3.1 [range.iter.op.advance] |
Generic code cannot call ranges::advance(i, s) |
Yes |
2 |
|
| 3306 |
New |
23.4.3.1 [range.iter.op.advance] |
ranges::advance violates its preconditions |
Yes |
2 |
|
| 3392 |
Open |
23.4.3.2 [range.iter.op.distance] |
ranges::distance() cannot be used on a move-only iterator with a sized sentinel |
Yes |
3 |
|
| 2858 |
New |
23.5.1 [reverse.iterators] |
LWG 2472: actually an incompatibility with C++03 |
Yes |
4 |
|
| 2595 |
New |
23.5.1.1 [reverse.iterator] |
reverse_iterator::operator[]'s return type revisited |
Yes |
3 |
|
| 3415 |
New |
23.5.2.1 [back.insert.iterator] |
back_insert_iterator fails when a container is also its value type |
No |
|
|
| 3391 |
New |
23.5.3 [move.iterators] |
Problems with counted_iterator/move_iterator::base() const & |
Yes |
2 |
|
| 3435 |
New |
23.5.3.3 [move.iter.cons] |
three_way_comparable_with<reverse_iterator<int*>, reverse_iterator<const int*>> |
Yes |
|
|
| 3265 |
New |
23.5.3.3 [move.iter.cons] |
move_iterator's conversions are more broken after P1207 |
Yes |
2 |
|
| 3293 |
New |
23.5.3.8 [move.iter.nonmember] |
move_iterator operator+() has incorrect constraints |
Yes |
3 |
|
| 3408 |
New |
23.5.6.1 [counted.iterator] |
LWG 3291 reveals deficiencies in counted_iterator |
No |
2 |
|
| 3188 |
New |
23.6.3 [istreambuf.iterator] |
istreambuf_iterator::pointer should not be unspecified |
Yes |
3 |
|
| 3107 |
New |
23.6.3 [istreambuf.iterator] |
istreambuf_iterator has public exposition-only member |
Yes |
4 |
|
| 2366 |
New |
23.6.3 [istreambuf.iterator] |
istreambuf_iterator end-of-stream equality |
No |
3 |
|
| 3108 |
New |
23.6.3.1 [istreambuf.iterator.proxy] |
istreambuf_iterator::proxy::operator* should be const |
Yes |
3 |
|
| 3207 |
Tentatively NAD |
23.7 [iterator.range] |
N in ssize(const T (&)[N]) should be size_t |
Yes |
|
|
| 2457 |
New |
23.7 [iterator.range] |
std::begin() and std::end() do not support multi-dimensional arrays correctly |
No |
3 |
|
| Issue |
Status |
Section |
Title |
Proposed Resolution |
Priority |
Duplicates |
| 3258 |
New |
24.3.1 [range.access.begin] |
Range access and initializer_list |
Yes |
3 |
|
| 3368 |
Tentatively Ready |
24.3.9 [range.prim.size] |
Exactly when does size return end - begin? |
Yes |
0 |
|
| 3403 |
New |
24.3.10 [range.prim.ssize] |
Domain of ranges::ssize(E) doesn't match ranges::size(E) |
No |
2 |
|
| 3361 |
New |
24.4.2 [range.range] |
safe_range<SomeRange&> case |
Yes |
3 |
|
| 3452 |
New |
24.4.4 [range.view] |
Are views really supposed to have strict 𝒪(1) destruction? |
No |
2 |
|
| 3404 |
Tentatively Ready |
24.5.3 [range.subrange] |
Finish removing subrange's conversions from pair-like |
Yes |
0 |
|
| 3433 |
New |
24.5.3.2 [range.subrange.access] |
subrange::advance(n) has UB when n < 0 |
Yes |
2 |
|
| 3428 |
Tentatively Ready |
24.6.2.2 [range.single.view] |
single_view's in place constructor should be explicit |
Yes |
0 |
|
| 3394 |
Tentatively NAD |
24.6.4.3 [range.istream.iterator] |
ranges::basic_istream_view::iterator has an empty iterator_traits |
No |
2 |
|
| 3448 |
New |
24.7.5.4 [range.transform.sentinel] |
transform_view's sentinel<false> not comparable with iterator<true> |
Yes |
|
|
| 3407 |
New |
24.7.6.1 [range.take.overview] |
Some problems with the wording changes of P1739R4 |
No |
2 |
|
| 3447 |
New |
24.7.6.2 [range.take.view] |
Deduction guides for take_view and drop_view have different constraints |
Yes |
|
|
| 3449 |
New |
24.7.6.3 [range.take.sentinel] |
take_view and take_while_view's sentinel<false> not comparable with their const iterator |
Yes |
|
|
| 3450 |
New |
24.7.7.2 [range.take.while.view] |
The const overloads of take_while_view::begin/end are underconstrained |
Yes |
|
|
| 3278 |
New |
24.7.10.2 [range.join.view] |
join_view<V>::iterator<true> tries to write through const join_view ptr |
Yes |
2 |
|
| 3322 |
Tentatively Resolved |
24.7.10.2 [range.join.view] |
Add join_view::base() member function |
Yes |
0 |
|
| 3365 |
Tentatively NAD |
24.7.10.3 [range.join.iterator] |
Rename ref-is-glvalue to deref-is-ref |
Yes |
0 |
|
| 3405 |
Tentatively Ready |
24.7.13.2 [range.common.view] |
common_view's converting constructor is bad, too |
Yes |
0 |
|
| 3406 |
New |
24.7.15.2 [range.elements.view] |
elements_view::begin() and elements_view::end() have incompatible
constraints |
Yes |
1 |
|
| Issue |
Status |
Section |
Title |
Proposed Resolution |
Priority |
Duplicates |
| 2963 |
New |
25 [algorithms] |
Algorithms with underspecified iterator requirements |
No |
3 |
|
| 1238 |
Open |
25 [algorithms] |
Defining algorithms taking iterator for range |
No |
3 |
|
| 2173 |
Open |
25 [algorithms] |
The meaning of operator + in the description of the algorithms |
Yes |
4 |
|
| 3419 |
Tentatively Ready |
25.2 [algorithms.requirements] |
§[algorithms.requirements]/15 doesn't reserve as many rights as it intends to |
Yes |
0 |
|
| 3049 |
Open |
25.2 [algorithms.requirements] |
Missing wording allowing algorithms to use copies of function objects as substitutes for their parameters |
Yes |
3 |
|
| 3213 |
Tentatively Resolved |
25.6.4 [alg.foreach] |
for_each_n and copy_n missing requirements for Size |
Yes |
3 |
|
| 3089 |
New |
25.7.1 [alg.copy] |
copy_n should require non-overlapping ranges |
Yes |
3 |
|
| 2471 |
Open |
25.7.1 [alg.copy] |
copy_n's number of InputIterator increments unspecified |
No |
3 |
|
| 2985 |
LEWG |
25.7.10 [alg.reverse] |
std::reverse should be permitted to be vectorized |
Yes |
|
|
| 2267 |
New |
25.8.1.4 [partial.sort.copy] |
partial_sort_copy underspecified for ranges of two different types |
No |
3 |
|
| 2973 |
LEWG |
25.8.5 [alg.merge] |
inplace_merge exact comparison count complexity prohibits useful real-world optimizations |
Yes |
|
|
| 3032 |
New |
25.8.7 [alg.heap.operations] |
ValueSwappable requirement missing for push_heap and make_heap |
Yes |
3 |
|
| 3029 |
Open |
25.8.7.2 [pop.heap] |
pop_heap over-constrains input |
Yes |
3 |
|
| 3410 |
New |
25.8.11 [alg.three.way] |
lexicographical_compare_three_way is overspecified |
No |
3 |
|
| 3060 |
New |
25.10.7 [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 |
2 |
|
| 3064 |
New |
25.11 [specialized.algorithms] |
How do uninitialized memory algorithms obtain pointer without undefined behavior? |
No |
3 |
|
| 3063 |
New |
25.11 [specialized.algorithms] |
Parallel algorithms in <memory> are underspecified |
No |
3 |
|
| 3436 |
New |
25.11.7 [specialized.construct] |
std::construct_at should support arrays |
No |
2 |
|
| Issue |
Status |
Section |
Title |
Proposed Resolution |
Priority |
Duplicates |
| 423 |
Open |
29 [input.output] |
Effects of negative streamsize in iostreams |
Yes |
3 |
|
| 2675 |
New |
29.5.3.6 [ios.base.callback] |
register_callback can fail |
No |
3 |
|
| 3434 |
New |
29.5.3.7 [ios.base.cons] |
ios_base never reclaims memory for iarray and parray |
Yes |
|
|
| 3118 |
New |
29.5.4.2 [fpos.operations] |
fpos equality comparison unspecified |
No |
4 |
|
| 2214 |
Open |
29.5.5.2 [basic.ios.cons] |
Clarify basic_ios::init call restrictions |
Yes |
4 |
|
| 2504 |
New |
29.6.3 [streambuf] |
basic_streambuf is not an abstract class |
No |
3 |
|
| 2349 |
Open |
29.7.4.2.1 [istream.formatted.reqmts] |
Clarify input/output function rethrow behavior |
Yes |
3 |
|
| 2498 |
Tentatively Resolved |
29.7.4.5 [istream.rvalue] |
operator>>(basic_istream&&, T&&) returns basic_istream&, but should probably return
basic_istream&& |
No |
3 |
|
| 2342 |
New |
29.7.5.1 [ostream] |
User conversion to wchar_t const* or to wchar_t not invoked for operator<< |
Yes |
4 |
|
| 2497 |
New |
29.7.5.1.3 [ostream.sentry] |
Use of uncaught_exception() |
Yes |
3 |
|
| 2984 |
New |
29.7.7 [ext.manip] |
put_money(99) is unnecessarily undefined |
Yes |
3 |
|
| 3309 |
New |
29.8 [string.streams] |
Is <ios> implicitly #included by <sstream>, <fstream> etc.? |
No |
3 |
|
| 3006 |
Tentatively Resolved |
29.8.2.1 [stringbuf.cons] |
Constructing a basic_stringbuf from a string — where does the allocator come from? |
No |
3 |
|
| 3097 |
New |
29.8.2.4 [stringbuf.virtuals] |
basic_stringbuf seekoff effects trigger undefined behavior and have contradictory returns |
No |
3 |
|
| 2286 |
Open |
29.8.2.4 [stringbuf.virtuals] |
stringbuf::underflow() underspecified |
Yes |
4 |
|
| 3430 |
New |
29.9.1 [fstream.syn] |
std::fstream & co. should be constructible from string_view |
No |
3 |
|
| 3399 |
Tentatively NAD |
29.10.2.1 [syncstream.syncbuf.overview] |
basic_syncbuf::emit() + Qt's #define emit = Big Bada-Boom |
Yes |
|
|
| 3098 |
New |
29.11.7.4.9 [fs.path.decompose] |
Misleading example for filesystem::path::filename() |
Yes |
3 |
|
| 2947 |
New |
29.11.9.1 [fs.enum.path.format] |
Clarify several filesystem terms |
No |
3 |
|
| 3078 |
New |
29.11.11 [fs.class.directory.entry] |
directory_entry, directory_iterator and recursive_directory_iterator perform needless path copies |
No |
3 |
|
| 3171 |
Open |
29.11.11 [fs.class.directory.entry] |
LWG 2989 breaks directory_entry stream insertion |
Yes |
2 |
|
| 2708 |
Open |
29.11.13.1 [fs.rec.dir.itr.members] |
recursive_directory_iterator::recursion_pending() is incorrectly specified |
Yes |
2 |
|
| 3057 |
Open |
29.11.14.3 [fs.op.copy] |
Correct copy_options handling |
Yes |
2 |
|
| 3056 |
New |
29.11.14.4 [fs.op.copy.file] |
copy_file() copies which attributes? |
Yes |
3 |
|
| Issue |
Status |
Section |
Title |
Proposed Resolution |
Priority |
Duplicates |
| 2819 |
New |
32.2.5 [thread.req.lockable] |
Unspecified Return type: elements |
Yes |
3 |
|
| 1484 |
LEWG |
32.4.2 [thread.thread.class] |
Need a way to join a thread with a timeout |
No |
|
|
| 1488 |
LEWG |
32.5 [thread.mutex] |
Improve interoperability between the C++0x and C1x threads APIs |
No |
|
|
| 936 |
LEWG |
32.5.3 [thread.mutex.requirements] |
Mutex type overspecified |
No |
|
961 |
| 961 |
LEWG |
32.5.3 [thread.mutex.requirements] |
Various threading bugs #11 |
No |
|
936 |
| 1493 |
LEWG |
32.5.3 [thread.mutex.requirements] |
Add mutex, recursive_mutex, is_locked function |
No |
|
|
| 2363 |
Open |
32.5.3.5.1 [thread.sharedtimedmutex.class] |
Defect in 30.4.1.4.1 [thread.sharedtimedmutex.class] |
Yes |
2 |
|
| 2731 |
Tentatively Ready |
32.5.4.1 [thread.lock.guard] |
Existence of lock_guard<MutexTypes...>::mutex_type typedef unclear |
Yes |
3 |
|
| 3343 |
New |
32.6.2 [thread.condition.nonmember] |
Ordering of calls to unlock() and notify_all() in Effects element of notify_all_at_thread_exit() should be reversed |
Yes |
3 |
|
| 3425 |
Tentatively Ready |
32.6.4 [thread.condition.condvarany] |
condition_variable_any fails to constrain its Lock parameters |
Yes |
0 |
|
| 2530 |
Open |
32.9.5 [futures.state] |
Clarify observable side effects of releasing a shared state |
No |
3 |
|
| 3003 |
Open |
32.9.6 [futures.promise] |
<future> still has type-erased allocators in promise |
Yes |
2 |
|
| 2532 |
Open |
32.9.6 [futures.promise] |
Satisfying a promise at thread exit |
Yes |
3 |
|
| 2095 |
LEWG |
32.9.6 [futures.promise] |
promise and packaged_task missing constructors needed for uses-allocator construction |
Yes |
4 |
|
| 3458 |
New |
32.9.7 [futures.unique.future] |
Is shared_future intended to work with arrays or function types? |
Yes |
|
|
| 2202 |
Deferred |
32.9.9 [futures.async] |
Missing allocator support by async |
No |
4 |
|