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CWG Poll 1: P3921R0 DR issues #8485

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@eisenwave eisenwave commented Nov 9, 2025 •
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Fixes #8454.

Fixes NB CA 041 (C++26 CD).
Fixes NB CA 092 (C++26 CD).
Fixes NB US 29-062 (C++26 CD).
Fixes NB US 35-066 (C++26 CD).
Fixes NB US 34-067 (C++26 CD).
Fixes NB US 60-110 (C++26 CD).
Fixes NB US 43-080 (C++26 CD).
Fixes NB US 15-032 (C++26 CD).
Fixes NB AT 4-099 (C++26 CD).
Fixes NB CA 045 (C++26 CD).
Fixes NB FR 155 (C++26 CD).

Also fixes cplusplus/CWG#546
Also fixes cplusplus/CWG#625
Also fixes https://github.com/cplusplus/nbballot/issues/616
Also fixes cplusplus/CWG#668
Also fixes cplusplus/CWG#681
Also fixes cplusplus/CWG#682
Also fixes cplusplus/CWG#685
Also fixes cplusplus/CWG#669
Also fixes https://github.com/cplusplus/nbballot/issues/669
Also fixes cplusplus/CWG#747
Also fixes cplusplus/CWG#751
Also fixes cplusplus/CWG#733
Also fixes cplusplus/CWG#756
Also fixes cplusplus/CWG#752
Also fixes cplusplus/CWG#750
Also fixes cplusplus/CWG#707
Also fixes cplusplus/CWG#759
Also fixes cplusplus/CWG#764
Also fixes cplusplus/CWG#761
Also fixes cplusplus/CWG#762
Also fixes cplusplus/CWG#767
Also fixes cplusplus/CWG#768
Also fixes cplusplus/CWG#769
Also fixes cplusplus/CWG#770
Also fixes cplusplus/CWG#755
Also fixes https://github.com/cplusplus/nbballot/issues/638
Also fixes https://github.com/cplusplus/nbballot/issues/642
Also fixes https://github.com/cplusplus/nbballot/issues/643
Also fixes https://github.com/cplusplus/nbballot/issues/688
Also fixes https://github.com/cplusplus/nbballot/issues/656
Also fixes https://github.com/cplusplus/nbballot/issues/607
Also fixes https://github.com/cplusplus/nbballot/issues/677
Also fixes https://github.com/cplusplus/nbballot/issues/620
Also fixes cplusplus/CWG#788
Also fixes cplusplus/CWG#780
Also fixes cplusplus/CWG#785
Also fixes cplusplus/CWG#786
Also fixes cplusplus/CWG#791
Also fixes https://github.com/cplusplus/nbballot/issues/734

@eisenwave eisenwave added this to the post-2025-11 milestone Nov 9, 2025
@eisenwave eisenwave changed the title CWG2555 Ineffective redeclaration prevention for using-declarators P3921R0 DR issues Nov 9, 2025
@eisenwave eisenwave force-pushed the motions-2025-11-cwg-1 branch from ba92856 to ef2b72c Compare November 9, 2025 11:41
@eisenwave eisenwave marked this pull request as ready for review November 9, 2025 15:17
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eisenwave commented Nov 9, 2025

@jensmaurer how does the referencing of editorial submissions and NB comments work on these types of PRs?

  • Should I add a Fixes cplusplus/CWG/... for each?
  • Should I add a Fixes cplusplus/nbballot/... for each closed NB comment?
  • Should I add a Fixes NB ... (C++26 CD). to the respective commit messages?

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jensmaurer commented Nov 12, 2025 •
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Should I add a Fixes NB ... (C++26 CD). to the respective commit messages?

Yes, please. We want a permanent record of those.

The "(Also) fixes" for /CWG/ and /nbballot/ goes into the pull request (initial comment) only, but please do add these (you did, apparently) so that when Thomas merges this, all related issues are auto-closed. This is github-level org only, so doesn't go into the commit message.

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jensmaurer commented Nov 12, 2025

Please fix

! Undefined control sequence.
2025-11-09T15:18:20.7047350Z l.7572 followed by \tocde
2025-11-09T15:18:20.7047500Z                          {dt}, and

Also, please check why this has merge conflicts.

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@eisenwave eisenwave added the changes requested Changes to the wording or approach have been requested and not yet applied. label Nov 13, 2025
@tkoeppe tkoeppe changed the title P3921R0 DR issues CWG Poll 1: P3921R0 DR issues Nov 15, 2025
@eisenwave
CWG2555 Ineffective redeclaration prevention for using-declarators
fbea5df
@eisenwave
CWG2677 Replacing union subobjects
0b46aac
@eisenwave
CWG2875 Missing support for round-tripping null pointer values throug…
58eb72c 
…h indirection/address operators

Fixes NB US 267-401 (C++26 CD).
@eisenwave
[diff.expr] Replace "For example" with \begin{example} environment
a0f612a
@eisenwave
CWG2900 Deduction of non-type template arguments with placeholder types
3f54620
@eisenwave
CWG2929 Lifetime of trivially-destructible static or thread-local obj…
ba7bc62 
…ects
@eisenwave
CWG2941 Lifetime extension for function-style cast to reference type
a2e7693 
Fixes NB CA 041 (C++26 CD).
@eisenwave
CWG3002 Template parameter/argument confusion
ae10fd2
@eisenwave
CWG3004 Pointer arithmetic on array of unknown bound
a3248fa
@eisenwave
CWG3008 Missing Annex C entry for void object declarations
6412a95
@eisenwave
CWG3011 Parenthesized aggregate initialization for new-expressions
ad3d876
@eisenwave
CWG3032 Template argument disambiguation
4e0c8c4 
Fixes NB CA 092 (C++26 CD).
@eisenwave
CWG3055 Misleading body for surrogate call function
9bf159d
@eisenwave
CWG3056 Missing semicolons in grammar for type-requirement
b225b39
@eisenwave
CWG3057 Ranking of derived-to-base conversions should ignore referenc…
37b5a1d 
…e binding
@eisenwave
CWG3059 throw; in constant expressions
8b70ad0
@eisenwave
CWG3060 Change in behavior for noexcept main
fdecaf0
@eisenwave
CWG3062 Overlapping specification of default template arguments
685911c
@eisenwave
CWG3066 Declarative nested-name-specifier in explicit instantiation
4fedbfd
@eisenwave
CWG3067 Array-to-pointer conversion with object type mismatch
db9cebc
@eisenwave
CWG3073 Dependence of R on T2 is unclear
b826f10
@eisenwave
CWG3075 Unclear matching of import directive
8c13279
@eisenwave
CWG3076 Remove unnecessary IFNDR for malformed header-name-tokens
a02e829
@eisenwave
CWG3077 Undesirable formation of import directive with string-literal
4945423
@eisenwave
CWG3078 Different treatment of #include pp-tokens and header-name-tokens
0fcab2d
@eisenwave
CWG3079 Allow empty-declarations in anonymous unions
9d244fb
@eisenwave
CWG3080 Clarify kinds of permitted template template arguments
e94cace
@eisenwave
CWG3081 Require glvalue when splicing direct base class relationship
c846736 
Fixes NB US 29-062 (C++26 CD).
@eisenwave
CWG3083 Remove redundant restrictions on class and enum definitions
4c2743d 
Fixes NB US 35-066 (C++26 CD).
@eisenwave
CWG3085 Apply restriction inside for-range-declaration
ff2a133 
Fixes NB US 34-067 (C++26 CD).
@eisenwave
CWG3086 Destringizing should consider all sorts of encoding-prefixes
e5c4531 
Fixes NB US 60-110 (C++26 CD).
@eisenwave
CWG3090 Internal linkage from header units
b06de55 
Fixes NB US 43-080 (C++26 CD).
@eisenwave
CWG3091 Linking of translation units as sequences of tokens
474d74d 
Fixes NB US 15-032 (C++26 CD).
@eisenwave
CWG3096 Value-dependence of size of structured binding pack with non-…
e8b5acf 
…dependent initializer

Fixes NB AT 4-099 (C++26 CD).
@eisenwave
CWG3097 Lambda expression introduces a scope
12beab9 
Fixes NB AT 4-099 (C++26 CD).
@eisenwave
CWG3100 Destruction order for objects with static storage duration
e25aeff 
Fixes NB CA 045 (C++26 CD).
@eisenwave
CWG3102 Update list of void contexts
a675df3
@eisenwave
CWG3105 Consteval destructor through immediate escalation
9161bf8
@eisenwave
CWG3106 Redundant exclusion of (non-existent) UCNs in r-char-sequences
ef035ed
@eisenwave
CWG3107 Misleading note "An alias template name is never deduced."
df06f46
@eisenwave
CWG3111 Template parameter objects of array type
f1e1301
@eisenwave
CWG3112 Introduce a term for C-style variadic functions
3d1de3a 
Fixes NB FR 155 (C++26 CD).
@eisenwave
CWG3116 First element of an array
5ac1488
@eisenwave eisenwave force-pushed the motions-2025-11-cwg-1 branch from a87b471 to 5ac1488 Compare November 23, 2025 07:11
@eisenwave eisenwave removed the changes requested Changes to the wording or approach have been requested and not yet applied. label Nov 23, 2025
@eisenwave eisenwave requested a review from jensmaurer November 23, 2025 07:18
jensmaurer
jensmaurer requested changes Nov 23, 2025
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@eisenwave eisenwave requested a review from jensmaurer November 24, 2025 05:51
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Successfully merging this pull request may close these issues.

CWG3005 [basic.scope.scope] Function parameters can be name-independent CWG3032 [temp.arg.general] Template argument grammar disambiguation rule versus template template-arguments CWG3002 [temp.dep.temp] Parameter/argument mixup in p4 CWG2941 [class.temporary] Lifetime extension for RefType{} CWG2900 [temp.deduct.type] Deduction of non-type template arguments with placeholder types
CWG3008 [diff.dcl] Incompatibility with C on declaration of "void object" CWG3011 [expr.new] does not handle parenthesized aggregate initialization in array new CWG3067 [conv.array] Wording of array-to-pointer conversion CWG3057 [over.ics.rank] Ranking of derived-to-base conversions should be agnostic to reference bindings CWG3055 [over.call.object] Misleading body for surrogate call function

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