WG21 PAPERS

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Select	Paper	Title	Authors	Audience	Doc Date	Mailing Date
	P2034R9	Partially Mutable Lambda Captures	R. McDougall, L. Garg	EWG CWG	2026-09-21	2026-09
Doc Date 2026-09-21 Mailing Date 2026-09 Unassigned Author(s) Ryan McDougall, Lakshay Garg Target Audience EWG CWG Revisions R8 R7 R6 Tracking issue View on GitHub Abstract `const` and `mutable` extend cleanly to lambda captures. The design is easy to implement, follows the language’s direction, and matches the common model of a lambda as shorthand for an object of a callable struct:
	P2719R8	Type-aware allocation and deallocation functions	L. Dionne, O. Hunt, V. Serebrennikov	CWG	2026-09-15	2026-09
Doc Date 2026-09-15 Mailing Date 2026-09 Unassigned Author(s) Louis Dionne, Oliver Hunt, Vlad Serebrennikov Target Audience CWG Revisions R7 R6 Tracking issue View on GitHub Abstract C++ currently provides two ways of customizing the creation of objects in new expressions. First, `operator new` can be provided as a static member function of a class, like `void* T::operator new`. If such a declaration is provided, an expression like `new T(...)` will use that allocation function. Otherwise, the global version of `operator new` can be replaced by users in a type-agnostic way, by
	P2952R3	Deduced return types for defaulted operator functions	A. O'Dwyer, M. Taylor	CWG	2026-09-17	2026-09
Doc Date 2026-09-17 Mailing Date 2026-09 Unassigned Author(s) Arthur O'Dwyer, Matthew Taylor Target Audience CWG Tracking issue View on GitHub Abstract Current C++ forbids explicitly defaulted functions to have placeholder return types such as `auto&`, except for C++20’s `operator<=>`. We remove this syntactic restriction in cases where the deduced return type would be the same as the expected one. This allows more consistency and less repetition when declaring defaulted functions.
	P3606R2	On Overload Resolution, Exact Matches and Clever Implementations	C. Jabot, Y. Zhang	CWG	2026-09-21	2026-09
Doc Date 2026-09-21 Mailing Date 2026-09 Unassigned Author(s) Corentin Jabot, Younan Zhang Target Audience CWG Tracking issue View on GitHub Abstract During overload resolution, if GCC finds an exact, non-ambiguous, non-template match, it will pick that overload and will not perform template argument deduction.
	P4353R0	Partially Mutable Lambda Captures	R. McDougall, L. Garg	EWG CWG	2026-08-19	2026-09
Doc Date 2026-08-19 Mailing Date 2026-09 Unassigned Author(s) Ryan McDougall, Lakshay Garg Target Audience EWG CWG Abstract At a high level: we have found that it is simple and straightforward to extend both `const` and `mutable` keywords to lambda syntax in a way that closely mirrors most users’ mental model of lambda as “a means of getting an object of a callable struct”, that is easy to implement, and is in line with the ongoing evolution of the language:

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

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