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Select	Paper	Title	Authors	Audience	Doc Date	Mailing Date
	P2034R9	Partially Mutable Lambda Captures	Ryan McDougall R. McDougall , Lakshay Garg 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 R10 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:
	P4353R0	Partially Mutable Lambda Captures	Ryan McDougall R. McDougall , Lakshay Garg 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 Tracking issue View on GitHub 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:

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