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

Disposition Updated

	Paper	Title	Authors	Audience
	P3091R6	Better lookups for `map` , `unordered_map`, and `flat_map`	P. Halpern	LWG
Mailing Date 2026-07 Post-Brno Author(s) Pablo Halpern Target Audience LWG Tracking issue View on GitHub Disposition Date 2026-06 Abstract The most convenient way to look up an element of a `map` -like container is to use the index operator, i.e., `theMap[key]` . This operator cannot be used, however, when 1) the container is `const` , 2) the mapped type is not default constructible, 3) the default-constructed value is inappropriate for the context, or 4) the container should not be modified. These limitations often force the user to
	P4139R3	Better Name for Better Lookups in P3091	N. Myers, P. Halpern	WG21
Mailing Date 2026-07 Post-Brno Author(s) Nathan Myers, Pablo Halpern Target Audience WG21 Revisions R2 R1 R0 Tracking issue View on GitHub Abstract [[P3091R5]](https://wg21.link/p3091r5), forwarded to LWG for C++29, adds member functions `get` to associative containers in the Standard Library. These member functions work like `operator[]` or `at`, but return an `optional<T&>` value instead of a simple reference; when lookup fails, they return the empty object. While the feature was strongly favored, support for the name `get` yielded only a w

Showing 2 of 2 papers · source: open-std.org

Mailings Beta

Sign in