January 13, 20251 yr The 2025-01 mailing of new standards papers is now available.  WG21 Number Title Author Document Date Mailing Date Previous Version Subgroup P0149R1 Generalised member pointers Jeff Snyder 2025-01-13 2025-01 P0149R0 EWG Evolution P0260R14 C++ Concurrent Queues Detlef Vollmann 2025-01-12 2025-01 P0260R13 SG1 Concurrency and Parallelism,LEWG Library Evolution P0876R19 fiber_context - fibers without scheduler Oliver Kowalke 2025-01-13 2025-01 P0876R18 EWG Evolution,CWG Core,LWG Library P1030R8 std::filesystem::path_view Niall Douglas 2024-12-21 2025-01 P1030R7 LEWG Library Evolution P1839R7 Accessing object representations Brian Bi 2025-01-11 2025-01 P1839R6 CWG Core P2079R6 System execution context Lucian Radu Teodorescu 2025-01-13 2025-01 P2079R5 SG1 Concurrency and Parallelism,LEWG Library Evolution P2414R5 Pointer lifetime-end zap proposed solutions Paul E. McKenney 2025-01-11 2025-01 P2414R4 SG1 Concurrency and Parallelism,LEWG Library Evolution,LWG Library P2434R3 Nondeterministic pointer provenance S. Davis Herring 2025-01-13 2025-01 P2434R2 SG22 Compatibility,EWG Evolution,CWG Core P2654R1 Modules and Macros Alisdair Meredith 2025-01-13 2025-01 P2654R0 EWG Evolution,LEWG Library Evolution P2663R6 Proposal to support interleaved complex values in std::simd Daniel Towner 2025-01-13 2025-01 P2663R5 LEWG Library Evolution P2664R9 Proposal to extend std::simd with permutation API Daniel Towner 2025-01-13 2025-01 P2664R8 SG1 Concurrency and Parallelism,LEWG Library Evolution P2688R5 Pattern Matching: `match` Expression Michael Park 2025-01-13 2025-01 P2688R4 EWG Evolution P2719R2 Type-aware allocation and deallocation functions Louis Dionne 2025-01-06 2025-01 P2719R1 EWG Evolution,CWG Core P2719R3 Type-aware allocation and deallocation functions Louis Dionne 2025-01-08 2025-01 P2719R2 EWG Evolution,CWG Core P2746R7 Deprecate and Replace Fenv Rounding Modes Hans Boehm 2025-01-12 2025-01 P2746R6 SG6 Numerics,LEWG Library Evolution P2758R4 Emitting messages at compile time Barry Revzin 2025-01-07 2025-01 P2758R3 LEWG Library Evolution,CWG Core P2806R3 do expressions Barry Revzin 2025-01-12 2025-01 P2806R2 EWG Evolution P2825R4 Overload resolution hook: declcall( unevaluated-call-expression ) GaÅ¡per Ažman 2025-01-13 2025-01 P2825R3 EWG Evolution,CWG Core P2830R8 Standardized Constexpr Type Ordering GaÅ¡per Ažman 2025-01-09 2025-01 P2830R7 LWG Library P2830R9 Standardized Constexpr Type Ordering GaÅ¡per Ažman 2025-01-10 2025-01 P2830R8 EWG Evolution,LEWG Library Evolution,CWG Core,LWG Library P2841R6 Concept and variable-template template-parameters Corentin Jabot 2025-01-13 2025-01 P2841R5 CWG Core P2843R1 Preprocessing is never undefined Alisdair Meredith 2025-01-13 2025-01 P2843R0 SG22 Compatibility,EWG Evolution P2883R1 `offsetof` Should Be A Keyword In C++26 Alisdair Meredith 2025-01-10 2025-01 P2883R0 EWGI SG17: EWG Incubator,EWG Evolution P2899R0 Contracts for C++ - Rationale Timur Doumler 2025-01-13 2025-01  SG21 Contracts,EWG Evolution,LEWG Library Evolution P2900R13 Contracts for C++ Joshua Berne 2025-01-13 2025-01 P2900R12 CWG Core,LWG Library P2933R3 std::simd overloads for <bit> header Daniel Towner 2025-01-13 2025-01 P2933R2 LWG Library P2952R2 auto& operator=(X&&) = default Arthur O'Dwyer 2025-01-08 2025-01 P2952R1 CWG Core P2953R1 Forbid defaulting operator=(X&&) && Arthur O'Dwyer 2025-01-08 2025-01 P2953R0 EWGI SG17: EWG Incubator P2971R3 Implication for C++ Walter E Brown 2025-01-12 2025-01 P2971R2 EWG Evolution,LEWG Library Evolution P2988R9 std::optional<T&> Steve Downey 2025-01-13 2025-01 P2988R8 LEWG Library Evolution,LWG Library P2996R9 Reflection for C++26 Barry Revzin 2025-01-13 2025-01 P2996R8 EWG Evolution P3019R12 Vocabulary Types for Composite Class Design Jonathan Coe 2025-01-12 2025-01 P3019R11 LEWG Library Evolution,LWG Library P3045R5 Quantities and units library Mateusz Pusz 2025-01-13 2025-01 P3045R4 SG6 Numerics,SG16 Unicode,LEWGI SG18: LEWG Incubator,LEWG Library Evolution P3070R2 Formatting enums Victor Zverovich 2025-01-13 2025-01 P3070R1 LEWG Library Evolution P3081R1 Core safety profiles for C++26 Herb Sutter 2025-01-06 2025-01 P3081R0 EWG Evolution,LEWG Library Evolution P3086R3 Proxy: A Pointer-Semantics-Based Polymorphism Library Mingxin Wang 2025-01-13 2025-01 P3086R2 LEWGI SG18: LEWG Incubator,LEWG Library Evolution P3094R6 std::basic_fixed_string Mateusz Pusz 2025-01-10 2025-01 P3094R5 LEWG Library Evolution P3111R3 Atomic Reduction Operations Gonzalo Brito Gadeschi 2025-01-13 2025-01 P3111R2 EWG Evolution,LEWG Library Evolution P3125R3 constexpr pointer tagging Hana DusÃková 2025-01-13 2025-01 P3125R2 LEWG Library Evolution P3139R1 Pointer cast for unique_ptr Zhihao Yuan 2024-12-27 2025-01 P3139R0 LEWG Library Evolution P3148R1 Formatting of chrono Time Values Alan Talbot 2025-01-13 2025-01 P3148R0 LEWG Library Evolution P3164R3 Early Diagnostics for Sender Expressions Eric Niebler 2025-01-09 2025-01 P3164R2 LEWG Library Evolution P3176R1 The Oxford variadic comma Jan Schultke 2024-12-18 2025-01 P3176R0 CWG Core P3179R5 C++ parallel range algorithms Ruslan Arutyunyan 2025-01-13 2025-01 P3179R4 LEWG Library Evolution P3206R0 A sender query for completion behaviour Maikel Nadolski 2025-01-13 2025-01  SG1 Concurrency and Parallelism P3229R0 Making erroneous behaviour compatible with Contracts Timur Doumler 2025-01-13 2025-01  SG21 Contracts,EWG Evolution,LEWG Library Evolution P3289R1 Consteval blocks Daveed Vandevoorde 2025-01-12 2025-01 P3289R0 EWG Evolution,CWG Core P3347R1 Invalid/Prospective Pointer Operations Paul E. McKenney 2025-01-11 2025-01 P3347R0 EWG Evolution P3348R2 C++26 should refer to C23 not C17 Jonathan Wakely 2025-01-13 2025-01 P3348R1 SG6 Numerics,LEWG Library Evolution P3351R2 views::scan Yihe Li 2025-01-12 2025-01 P3351R1 SG9 Ranges P3367R3 constexpr coroutines Hana DusÃková 2025-01-06 2025-01 P3367R2 EWG Evolution,LWG Library P3373R1 Of Operation States and Their Lifetimes Robert Leahy 2025-01-11 2025-01 P3373R0 LEWG Library Evolution P3374R1 Adding formatter for fpos Liang Jiaming 2025-01-07 2025-01 P3374R0 LEWGI SG18: LEWG Incubator,LEWG Library Evolution P3375R2 Reproducible floating-point results Guy Davidson 2025-01-13 2025-01 P3375R1 SG6 Numerics,EWGI SG17: EWG Incubator P3385R3 Attributes reflection Aurelien Cassagnes 2025-01-06 2025-01 P3385R2 SG7 Reflection P3388R1 When Do You Know connect Doesn't Throw? Robert Leahy 2025-01-11 2025-01 P3388R0 LEWG Library Evolution P3394R1 Annotations for Reflection Daveed Vandevoorde 2025-01-12 2025-01 P3394R0 SG7 Reflection,LEWG Library Evolution,CWG Core P3395R0 Formatting of std::error_code Victor Zverovich 2024-12-22 2025-01  SG16 Unicode P3400R0 Specifying Contract Assertion Properties with Labels Joshua Berne 2025-01-09 2025-01  SG21 Contracts,All of WG21 P3402R2 A Safety Profile Verifying Initialization Marc-André Laverdière 2025-01-13 2025-01 P3402R1 SG23 Safety and Security P3407R1 Make idiomatic usage of `offsetof` well-defined Brian Bi 2025-01-11 2025-01 P3407R0 EWG Evolution P3411R1 `any_view` Hui Xie 2025-01-11 2025-01 P3411R0 SG9 Ranges,LEWG Library Evolution P3412R1 String interpolation Bengt Gustafsson 2025-01-12 2025-01 P3412R0 EWGI SG17: EWG Incubator,EWG Evolution P3420R1 Reflection of Templates Andrei Alexandrescu 2025-01-13 2025-01 P3420R0 SG7 Reflection P3423R1 Extending User-Generated Diagnostic Messages Yihe Li 2025-01-12 2025-01 P3423R0 EWG Evolution P3425R1 Reducing operation-state sizes for subobject child operations Lewis Baker 2025-01-13 2025-01 P3425R0 LEWG Library Evolution P3430R2 simd issues: explicit, unsequenced, identity-element position, and members of disabled simd Matthias Kretz 2025-01-13 2025-01 P3430R1 LEWG Library Evolution P3431R0 Deprecate const-qualifier on begin/end of views Jonathan Müller 2025-01-13 2025-01  SG9 Ranges P3439R1 Chained comparisons: Safe, correct, efficient Herb Sutter 2025-01-06 2025-01 P3439R0 EWG Evolution P3475R1 Defang and deprecate memory_order::consume Hans Boehm 2025-01-11 2025-01 P3475R0 SG1 Concurrency and Parallelism,EWG Evolution,LEWG Library Evolution,CWG Core,LWG Library P3477R2 There are exactly 8 bits in a byte JF Bastien 2025-01-11 2025-01 P3477R1 LEWG Library Evolution,CWG Core P3480R3 std::simd is a range Matthias Kretz 2025-01-13 2025-01 P3480R2 LEWG Library Evolution P3481R1 std::execution::bulk() issues Lucian Radu Teodorescu 2025-01-13 2025-01 P3481R0 SG1 Concurrency and Parallelism,LEWG Library Evolution P3491R1 define_static_{string,object,array} Barry Revzin 2025-01-12 2025-01 P3491R0 EWG Evolution,LEWG Library Evolution P3496R0 Immediate-Escalating Expressions Barry Revzin 2025-01-05 2025-01  EWG Evolution,LEWG Library Evolution P3499R0 Exploring strict contract predicates Lisa Lippincott 2025-01-13 2025-01  SG21 Contracts,EWG Evolution P3500R0 Are Contracts "safe"? Timur Doumler 2025-01-13 2025-01  EWG Evolution P3501R0 The ad-dressing of cats S. Davis Herring 2025-01-10 2025-01  EWG Evolution,CWG Core,LWG Library P3506R0 P2900 Is Still not Ready for C++26 Gabriel Dos Reis 2025-01-13 2025-01  EWG Evolution P3516R0 Uninitialized algorithms for relocation Louis Dionne 2025-01-13 2025-01  LEWG Library Evolution P3527R1 Pattern Matching: *variant-like* and `std::expected` Michael Park 2025-01-13 2025-01 P3527R0 EWG Evolution,LEWG Library Evolution P3533R1 constexpr virtual inheritance Hana DusÃková 2025-01-10 2025-01 P3533R0 EWG Evolution P3534R0 Avoid UB When Compiling Code That Violates Library Specification Alisdair Meredith 2025-01-13 2025-01  LWG Library P3541R1 Violation handlers vs `noexcept` Andrzej KrzemieÅski 2025-01-06 2025-01 P3541R0 SG21 Contracts,SG23 Safety and Security,EWG Evolution P3546R0 Explicit return type deduction for std::numeric_limits and numbers Thomas Mejstrik 2024-12-19 2025-01  LEWGI SG18: LEWG Incubator P3547R0 Modeling Access Control With Reflection Dan Katz 2025-01-09 2025-01  SG7 Reflection,LEWG Library Evolution P3548R0 P1030 `std::filesystem::path_view` forward progress options Niall Douglas 2025-01-13 2025-01  LEWG Library Evolution P3549R0 Diverging expressions Barry Revzin 2025-01-12 2025-01  EWG Evolution P3550R0 Imports cannot ... Alisdair Meredith 2025-01-13 2025-01  EWGI SG17: EWG Incubator,LEWGI SG18: LEWG Incubator P3552R0 Add a Coroutine Lazy Type Dietmar Kühl 2025-01-13 2025-01  SG1 Concurrency and Parallelism,LEWG Library Evolution P3554R0 Non-transient allocation with vector and basic_string Barry Revzin 2025-01-05 2025-01  EWG Evolution P3555R0 An infinite range concept Jonathan Müller 2025-01-13 2025-01  SG9 Ranges P3557R0 High-Quality Sender Diagnostics with Constexpr Exceptions Eric Niebler 2025-01-12 2025-01  LEWG Library Evolution P3558R0 Core Language Contracts By Default Joshua Berne 2025-01-12 2025-01  SG21 Contracts,SG23 Safety and Security P3559R0 Trivial relocation: One trait or two? Arthur O'Dwyer 2025-01-08 2025-01  LEWG Library Evolution P3560R0 Error Handling in Reflection Barry Revzin 2025-01-12 2025-01  EWG Evolution,LEWG Library Evolution P3561R0 Index based coproduct operations on variant, and library wording Esa Pulkkinen 2025-01-13 2025-01  LEWGI SG18: LEWG Incubator P3564R0 Make the concurrent forward progress guarantee usable in `bulk` Mark Hoemmen 2025-01-12 2025-01  SG1 Concurrency and Parallelism P3565R0 Virtual floating-point values S. Davis Herring 2025-01-10 2025-01  SG6 Numerics P3566R0 You shall not pass `char*` - Safety concerns working with unbounded null-terminated strings Marco Foco 2025-01-13 2025-01  SG23 Safety and Security,LEWG Library Evolution,LWG Library,ARG ABI Review Group P3567R0 `flat_meow` Fixes Hui Xie 2025-01-11 2025-01  LEWG Library Evolution,LWG Library P3568R0 break label; and continue label; Jan Schultke 2025-01-12 2025-01  EWGI SG17: EWG Incubator,SG22 Compatibility P3569R0 Split define_aggregate from Reflection Shafik Yaghmour 2025-01-11 2025-01  EWG Evolution P3572R0 Pattern matching Bjarne Stroustrup 2025-01-12 2025-01  EWG Evolution P3573R0 Contract concerns Bjarne Stroustrup 2025-01-12 2025-01  SG21 Contracts,EWG Evolution,LEWG Library Evolution P3574R0 Constexpr Callables Steve Downey 2025-01-13 2025-01  LEWG Library Evolution,LWG Library P3575R0 SG14: Low Latency/Games/Embedded/Financial Trading virtual Meeting Minutes 2024/11/13 Michael Wong 2025-01-12 2025-01  SG14 Low Latency P3576R0 SG19: Machine Learning virtual Meeting Minutes to 2024/11/14-2024/12/12 Michael Wong 2025-01-12 2025-01  SG19 Machine Learning P3577R0 Requiring a non-throwing system-provided (default) contract-violation handler John Lakos 2025-01-12 2025-01  SG21 Contracts,EWG Evolution P3578R0 Language Safety and Grandma Safety Ryan McDougall 2025-01-13 2025-01  SG21 Contracts,SG23 Safety and Security,EWG Evolution P3579R0 Fix matching of non-type template parameters when matching template template parameters Matheus Izvekov 2025-01-13 2025-01  CWG Core P3580R0 The Naming of Things Alan Talbot 2025-01-13 2025-01  EWG Evolution,LEWG Library Evolution P3581R0 No, inplace_vector shouldn't have an Allocator Nevin Liber 2025-01-13 2025-01  LEWG Library Evolution P3582R0 Observed a contract violation? Skip subsequent assertions! Andrzej KrzemieÅski 2025-01-13 2025-01  SG21 Contracts,EWG Evolution P3583R0 Contracts, Types & Functions Jonas Persson 2025-01-13 2025-01  SG21 Contracts P3584R0 Enrich Facade Creation Facilities for the Pointer-Semantics-Based Polymorphism Library - Proxy Mingxin Wang 2025-01-13 2025-01  LEWGI SG18: LEWG Incubator,LEWG Library Evolution P3585R0 allocator_traits::is_internally_relocatable Pablo Halpern 2025-01-13 2025-01  LEWGI SG18: LEWG Incubator,LEWG Library Evolution P3586R0 The Plethora of Problems With Profiles Corentin Jabot 2025-01-13 2025-01  EWG Evolution P3587R0 Reconsider reflection access for C++26 Lauri Vasama 2025-01-13 2025-01  SG7 Reflection,EWG Evolution P3588R0 Allow static data members in local and unnamed classes Brian Bi 2025-01-13 2025-01  EWG Evolution P3589R0 C++ Profiles: The Framework Gabriel Dos Reis 2025-01-13 2025-01  EWG Evolution P3590R0 Constexpr Coroutines Burdens Daveed Vandevoorde 2025-01-13 2025-01  EWG Evolution,CWG Core View the full article
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