WG21 PAPERS

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Select	Paper	Title	Authors	Audience
	P3832R1	Timed lock algorithms for multiple lockables	T. Lyngmo	SG1 SG18
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Ted Lyngmo Target Audience SG1 SG18 Revisions R3 R2 Tracking issue View on GitHub Abstract C++11 introduced `std::lock` and `std::try_lock` (and C++17 introduced `std::scoped_lock`) to simplify deadlock-free acquisition of multiple lockables. These algorithms support BasicLockable and Lockable objects, but there is currently no facility for timed acquisition of multiple TimedLockable objects.
	P3833R2	std::unique_multilock	T. Lyngmo	SG1 SG18
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Ted Lyngmo Target Audience SG1 SG18 Revisions R3 R1 Tracking issue View on GitHub Abstract This paper proposes `std::multi_lock`, a RAII class template that combines the functionality of `std::unique_lock` and `std::scoped_lock`. Unlike `std::scoped_lock`, which provides only basic RAII semantics, `std::multi_lock` offers the full flexibility of `std::unique_lock` (deferred locking, try-lock operations, timed locking, and ownership transfer) while supporting multiple mutexes simultaneou
	P4049R0	Relaxing and extending std::copy	G. D'Angelo	LEWG SG1 SG9 SG18 SG23
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Giuseppe D'Angelo Target Audience LEWG SG1 SG9 SG18 SG23 Revisions R1 Tracking issue View on GitHub Abstract In this table we’re summarizing the status quo and the changes brought by the options and extensions illustrated above. The table refers to `std::copy`, but similar changes are expected for the other algorithms of the family.
	P4148R0	protocol: Structural Subtyping for C++	J. Coe, H. Dusikova, A. Peacock, P. Craig, N. Banglawala	SG7 SG18
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Jonathan B. Coe, Hana Dusikova, Antony Peacock, Philip Craig, Neelofer Banglawala Target Audience SG7 SG18 Revisions R2 R1 Tracking issue View on GitHub Abstract We propose `protocol<T,` `A>` and `protocol_view<T>`, standard library vocabulary types for structural subtyping in C++. Interfaces are specified as plain structs; any type whose member functions satisfy the interface is accepted without requiring explicit inheritance.
	P4174R0	Named, composable type sets for concept constraints	E. Spiridon	SG18
Intent Proposal Mailing Date 2026-04 Post-Croydon Author(s) Emanuel Spiridon Target Audience SG18 Tracking issue View on GitHub Abstract This paper explores the possibility of adding a library addition to <type_traits> to assist the programmer when writing concept constraints. Concept constraints can be written by using the std::is_same_v tool, however the compile time logic is hard to understand, and at times, are error-prone at scale. An issue that modern concept constraints have is that, despite how simple it is once you impleme
	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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