2026 Telecons

History, status, and review outcomes can be found by visiting the GitHub Issue for the paper: wg21.link/PNNNN/github.

Scheduled

Subject	Bucket	Minutes	Chair	Date & Time
P0260R21: Concurrent Queues (make concepts non expo-only (P4350R0: presentation))	B3	2026-08-18 Minutes	Inbal Levi	2026-08-18 15:00 to 16:30 UTC
P3928R1: static_sized_range (addresses LWG4108) P2527R3: std::variant_alternative_index and std::tuple_element_index (is required) (tentative)	B3	2026-08-25 Minutes	Fabio Fracassi	2026-08-25 15:00 to 16:30 UTC
P3255R2: Expose whether atomic notifying operations are lock-free (forwarded by SG1) (tentative) P3642R6: Carry-less product: std::clmul	B3	2026-09-01 Minutes	Andreas Weis	2026-09-01 15:00 to 16:30 UTC
PXXXXRX: TBD PXXXXRX: TBD	B3	2026-09-08 Minutes	Inbal Levi	2026-09-08 15:00 to 16:30 UTC
PXXXXRX: TBD PXXXXRX: TBD	B3	2026-09-15 Minutes	Fabio Fracassi	2026-09-15 15:00 to 16:30 UTC
PXXXXRX: TBD PXXXXRX: TBD	B3	2026-09-22 Minutes	Andreas Weis	2026-09-22 15:00 to 16:30 UTC
PXXXXRX: TBD PXXXXRX: TBD	B3	2026-09-29 Minutes	Inbal Levi	2026-09-29 15:00 to 16:30 UTC
PXXXXRX: TBD P4295R0: Single Ends for C++ Concurrent Queue (pending SG1)	B3	2026-10-06 Minutes	Fabio Fracassi	2026-10-06 15:00 to 16:30 UTC
PXXXXRX: TBD PXXXXRX: TBD	B3	2026-10-13 Minutes	Andreas Weis	2026-10-13 15:00 to 16:30 UTC
PXXXXRX: TBD PXXXXRX: TBD	B3	2026-09-29 Minutes	Fabio Fracassi	2026-10-20 15:00 to 16:30 UTC
**(Last telecon before Rio!)** PXXXXRX: TBD PXXXXRX: TBD	B3	2026-10-06 Minutes	Inbal Levi	2026-10-27 15:00 to 16:30 UTC

Unscheduled

NOTE: This is partial list only and may not be up to date, papers are added from github, please see status there.

Subject	Bucket	Minutes	Chair	Date & Time
P3364R0: Remove deprecated function u8path (pending SG16) P0178R0: Allocators and swap (Brno) P2929R0: chunked_invoke (Brno) P2964R0: Allowing user-defined types in std::simd (Brno) P2527R3: std::variant_alternative_index and std::tuple_element_index (Brno) P3234R1: Utility to check if a pointer is in a given range (core issue, unclear if language supports) P3094R5: std::basic_fixed_string (Brno) P3135R0: Hazard Pointer Extensions (pending SG1) P3047R0: Remove deprecated namespace `relops` from C++26 (C++29) P2769R3: get_element customization point object (needs-revision)	B2 B3 B3 B3 B3 B3 B3 B3 B3 B3	P3364 Minutes P0178 Minutes P2929 Minutes P2964 Minutes P2527 Minutes P3234 Minutes P3094 Minutes P3135 Minutes P3047 Minutes P2769 Minutes	TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD	2026-XX-XX 15:00 to 16:30 UTC

Past

Subject	Bucket	Minutes	Chair	Date & Time
First 2026 telecon! P3826R3: Fix or Remove Sender Algorithm Customization (Discuss: US-207, FI-331, CA-358, FR-031, US 202)	B1	2026-01-06 Minutes	Andreas Weis	2026-01-06 16:00 to 17:30 UTC
Reflection US 49-090: 13.2 [temp.param] Add "is_structural_type" query facility to the library P3856 US 82-145: [meta.const.eval] Extend std::is_within_lifetime (Adopt P3450) FR-013-159: 21.4.1 [meta.syn] Facilitate the implementations of meta::members_of AT 5-183 : 21.4.15p11 [meta.reflection.array] Consistently use std::array return type for reflect_constant_array US 90-197: 21.4.3p4-5 [meta.define.static] Return reference (not pointer) from define_static_object P3739	B1	2026-01-13 Minutes	Fabio Fracassi	2026-01-13 16:00 to 17:30 UTC
Reflection Overflow US 93-200: 21.4.6 [meta.reflection.names] Add has_source_location query US 98-204: 21.4.7p26 [meta.reflection.queries] Replace is_complete_type with throwing assert_is_complete FR-014-160: 21.4.1 [meta.syn] string_view, span, string, and vector should be structural types	B1	2026-01-20 Minutes	Fabio Fracassi	2026-01-20 16:00 to 17:30 UTC
(non) constexpr uncaught_exceptions and current_exception / Trivially copyable / std::atomic_ref::address US 67-118: 17.9.2, 17.9.6 [support.exception] Do not make uncaught_exceptions() and current_exception() constexpr (and duplicates: PL-012,GB 03-119, DE-120, FI-121) (Paper "P3842R0: A conservative fix for constexpr uncaught_exceptions() and current_exception()" express intent). US 135-216: 22.8.6.4p2, 5 [expected.object.assign] expected should be trivially copyable as appropriate US 136-217: 22.8.7.4p1, 4 [expected.void.assign] expected<void, E> should be trivially copyable as appropriate P3960R0: Define copy-constructibility-from-bytes (alternative approach) US 132-211: 22.3.2p20, 23, 32, 36 [pairs.pair] pair should be trivially copyable as appropriate US 133-212: 22.4.4.3p2, 5, 8, 12 [tuple.assign] tuple should be trivially copyable as appropriate FR-030-310: 32.5.7.2 [atomics.ref.ops] std::atomic_ref::address should return uintptr_t (P3936)	B1	2026-01-27 Minutes	Andreas Weis	2026-01-27 16:00 to 17:30 UTC
Task Type US 261-391: 33.13.6.5p3, 16, 17 [task.promise] Bad specification of parameter type US 254-385: 33.13.6.5 [task.promise] Constraint allocator_arg argument to be the first argument LWG4334 US 255-384: 33.13.6.5 [task.promise] Use allocator from receiver's environment LWG4335 (Paper: P3980R0) US 238-368: 33.13.5 [exec.task.scheduler] Allow customizations when using task_scheduler LWG4336 (SG1 recommended rejection, P3927R0 is a later paper contains new information)	B1	2026-02-03 Minutes	Andreas Weis	2026-02-03 16:00 to 17:30 UTC
reserve_hint FR-023-244: 25 [ranges] Adopt P3763 Remove redundant reserve_hint members from view classes (Paper: P3763R1) Hive CZ 1-231: 23.3.8 [hive] make std::hive constexpr (Paper: P3933R0, comments from author: P3945R0) US 143-238: 23.3.9.3p9 [hive.capacity] Tighten specification for shrink_to_fit and reshape US 144-237: 23.3.9.3p9 [hive.capacity] shrink_to_fit and reshape should return reallocation indication US 142-236: 23.3.9.3p4 [hive.capacity] reserve(n) gap between postconditions and throws (LWG Issue: LWG4379)	BX BX	2026-02-10 Minutes	Inbal Levi	2026-02-10 17:00 to 18:30 UTC (NOTE: 1H later!)
inplace_vector PL-006: 23.3.16.1 [inplace.vector.overview] Change the return type of inplace_vector try_push_back and try_emplace_back functions to optional (P3981) US 150-228: 23.3.16.5p8-14 [inplace.vector.modifiers] try_push_back should be revised to use const optional<&> GB 08-225: 23.3.16 [inplace.vector] try_emplace_back and try_push_back should return optional US 68-122: 17.9.7p13-15 [propagation] return optional<T&> from exception_ptr_cast (P3739) US 149-226: 23.3.16 [inplace.vector] Do not redesign std::inplace_vector inplace_vector	B1	2026-02-17 Minutes	Fabio Fracassi	2026-02-17 16:00 to 17:30 UTC
P3655R3: cstring_view (C++29)	B3	P3655 Minutes	Andreas Weis	2026-02-24 16:00 to 17:30 UTC
C++26 (feedback only, no binding decisions) P3982R0: Fix meaning of strided_slice::extent for C++26 (related to PL-007: 23.7.3.7 [mdspan.sub] [mdspan.sub] Define the extent member of the strided_slice) C++29 P3724R3: Integer division (Seen by SG6)	B3	2026-03-03 Minutes	Fabio Fracassi	2026-03-03 16:00 to 17:30 UTC
Last telecon before UK (C++29) P3791R0: constexpr (deterministic) random P3969R0: Fixing std::bit_cast of types with padding bits (Overflow) P3642R4: Carry-less product: std::clmul (Seen by SG6) P3793R1: Better shifting (Seen by SG6) P3772R1: std::simd overloads for bit permutations (Seen by SG6)	B3	2026-03-10 Minutes	Andreas Weis	2026-03-10 16:00 to 17:30 UTC
P3067R0: Provide predefined simd permute generator functions for common operations (feedback on desirability, no wording) P2964R4: Allowing user-defined types in std::simd (update only)	B3	2026-07-07 Minutes	Inbal Levi	2026-07-07 15:00 to 16:30 UTC
P2848R1: std::is_uniqued (forwarded by SG9) P3216R3: views::slice (forwarded by SG9)	B3	2026-07-14 Minutes	Fabio Fracassi	2026-07-14 15:00 to 16:30 UTC
P0870R8: A proposal for a type trait to detect narrowing conversions (reflection metafunction) P2249R6: Mixed comparisons for smart pointers	B3	2026-07-21 Minutes	Andreas Weis	2026-07-21 15:00 to 16:30 UTC
P3230R3: views::unchecked_(take|drop) (forwarded by SG9)	B3	2026-07-28 Minutes	Inbal Levi	2026-07-28 15:00 to 16:30 UTC
P2689R3: Atomic Refs Bound to Memory Orderings & Atomic Accessors P3139R1: Pointer cast for unique_ptr	B3	2026-08-04 Minutes	Fabio Fracassi	2026-08-04 15:00 to 16:30 UTC
P3351R4: views::scan (forwarded by SG9)	B3	2026-08-11 Minutes	Andreas Weis	2026-08-11 15:00 to 16:30 UTC