WG21 PAPERS

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Filter and export papers from the C++ Committee’s monthly mailings by time frame and audience using the options below, or refine your export further with the Select button. Links point directly to the official WG21 papers on open-std.org.

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Select	Paper	Title	Authors	Audience
	P2964R3	Allowing user-defined types in std::simd	D. Towner, R. Arutyunyan	LEWG SG6
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Daniel Towner, Ruslan Arutyunyan Target Audience LEWG SG6 Revisions R5 R4 R2 Tracking issue View on GitHub Abstract The C++ standard library includes data-parallel types in the `<simd>` header, currently restricting element types to a closed list: arithmetic types and `std::complex` specializations. This paper proposes a minimal change to the specification in which the closed list is replaced with trait-based constraints that handle all existing types while naturally extend support to enumerations, `std::byte`
	P3161R5	Unified integer overflow arithmetic	T. Freire	SG6
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Tiago Freire Target Audience SG6 Revisions R6 Tracking issue View on GitHub Abstract Addition and uniformization of integer arithmetic functions with overflow behavior
	P3839R0	Slides from the Evening Session on P3045 (Quantities and Units Library)	M. Pusz	LEWG SG6 SG20 SG23
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Mateusz Pusz Target Audience LEWG SG6 SG20 SG23 Tracking issue View on GitHub
	P4010R1	Add funnel shift operations to bit header	D. Towner	LEWG SG6
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Daniel Towner Target Audience LEWG SG6 Revisions R0 Tracking issue View on GitHub Abstract This paper proposes adding funnel shift operations to the C++ standard library. Funnel shifts concatenate two integer values, shift the concatenated result, and extract bits. This is a fundamental primitive bit operation with widespread use across many domains including cryptography, hashing, compression, and pseudo-random number generation.
	P4168R0	Fix defects in floating-point std::from_chars (LWG3081, LWG3082, LWG3456)	J. Schultke	SG6
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Jan Schultke Target Audience SG6 Tracking issue View on GitHub Abstract This paper supersedes [[P2827R1]](https://wg21%2elink/p2827r1) and fixes [[LWG3081]](https://wg21%2elink/LWG3081), [[LWG3082]](https://wg21%2elink/LWG3082), and [[LWG3456]](https://wg21%2elink/LWG3456). It is intended as a defect report for C++17. The handling of floating-point overflow and underflow in `std::from_chars` is inconsistent; the implementations diverge from each other, and every imple
	P4188R0	Extensible Math Functions for C++	S. Gros-Lemesre	LEWG LWG SG6 SG18
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Stephane Gros-Lemesre Target Audience LEWG LWG SG6 SG18 Revisions R1 Tracking issue View on GitHub

Showing 6 of 6 papers · source: open-std.org

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