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
	P3642R4	Carry-less product: std::clmul	J. Schultke	LEWG
Intent Proposal Mailing Date 2026-02 Pre-Croydon Author(s) Jan Schultke Target Audience LEWG Revisions R6 R5 Tracking issue View on GitHub Abstract [Carry-less multiplication](https://en.wikipedia.org/wiki/Carry-less_product) is a simple numerical operation on unsigned integers. It can be a seen as a regular multiplication where `xor` is being used as a reduction instead of `+`.
	P3666R3	Bit-precise integers	J. Schultke	EWG LEWG
Intent Proposal Mailing Date 2026-02 Pre-Croydon Author(s) Jan Schultke Target Audience EWG LEWG Revisions R4 Tracking issue View on GitHub Abstract In distant history, there have been various attempts at standardizing multi-precision integers in C++, such as [[N1692]](https://wg21%2elink/n1692) "A Proposal to add the Infinite Precision Integer to the C++ Standard Library", [[N1744]](https://wg21%2elink/n1744) "Big Integer Library Proposal for C++0x", and [[N4038]](https://wg21%2elink/n4038) "Proposal for Unbounded-Precision Integer Types", al
	P3724R3	Integer division	J. Schultke	LEWG
Intent Proposal Mailing Date 2026-02 Pre-Croydon Author(s) Jan Schultke Target Audience LEWG Revisions R4 Tracking issue View on GitHub Abstract C++ currently only offers truncating integer division in the form of the `/` operator. However, other rounding modes have various use cases too, and implementing these as the user can be surprisingly hard, especially when integer overflow needs to be avoided, and negative inputs are accepted.
	P3737R3	std::array is a wrapper for an array!	J. Schultke	LEWG
Intent Proposal Mailing Date 2026-02 Pre-Croydon Author(s) Jan Schultke Target Audience LEWG Revisions R4 Tracking issue View on GitHub Abstract The `std::array` class template has established itself as a de-facto replacement for "builtin arrays" or "C-style arrays" in many code bases. This also means that it is frequently taught to novice programmers, with an explanation along the lines of:
	P3969R0	Fixing std::bit_cast of types with padding bits	J. Schultke	LEWG
Intent Proposal Mailing Date 2026-02 Pre-Croydon Author(s) Jan Schultke Target Audience LEWG Revisions R2 R1 Tracking issue View on GitHub Abstract The following use of `std::bit_cast` has undefined behavior at compile time:

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

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