WG21 PAPERS

Mailings Beta

Volunteer-driven · Not affiliated with WG21 or ISO

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.

Submit Issue C++ Standards Committee Papers

Select	Paper	Title	Authors	Audience
	P2929R3	simd_invoke	D. Towner, R. Arutyunyan	LEWG
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Daniel Towner, Ruslan Arutyunyan Target Audience LEWG Revisions R4 R2 Tracking issue View on GitHub Abstract ISO/IEC 19570:2018 introduced data-parallel types to the C++ Extensions for Parallelism TS [P1928R15]. That paper, and several ancillary papers, do an excellent job of setting out the main features of an extension to C++ which allows generic data parallel programming on arbitrary targets. However, it is inevitable that the programmer will want to make some use of target-specific intrinsics in orde
	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`
	P3440R3	Add n_elements named constructor to std::simd	D. Towner	LEWG
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Daniel Towner Target Audience LEWG Revisions R2 Tracking issue View on GitHub Abstract When iterating over large dynamic data sets using `std::simd` there will inevitably be situations where the very last block of data doesn’t fill the entire `std::simd` object. This remainder needs to be processed using a partially filled `std::simd` object. For example:
	P3983R1	simd object representation	D. Towner, R. Arutyunyan	LEWG LWG SG1
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Daniel Towner, Ruslan Arutyunyan Target Audience LEWG LWG SG1 Revisions R2 R0 Tracking issue View on GitHub Abstract The Working Draft makes `simd` types trivially copyable types, which allows `std::bit_cast` operations. However, the object representation is unspecified, making the results implementation-defined.
	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.

Showing 5 of 5 papers · source: open-std.org

Mailings Beta

Sign in