P2980 R1 A motivation, scope, and plan for a quantities and units library

[wg21bot]

P2980R0 A motivation, scope, and plan for a physical quantities and units library (Mateusz Pusz, Dominik Berner, Johel Ernesto Guerrero Peña, Chip Hogg, Nicolas Holthaus, Roth Michaels, Vincent Reverdy)

[inbal2l]

Scheduled for Friday in Kona. SG6 would see this before it reaches LEWG.

[mpusz]

D2980R1 will be presented.

[inbal2l]

Library Evolution Meeting Kona 2023-11-10

2023-11-10 Library Evolution Kona 2023 Meeting Minutes

Chair: Inbal Levi / Nevin Liber

Champion: Mateusz Pusz

Minute Taker: Billy Baker

Polls

POLL: Given that our time is limited, more time should be promised for a quantities and units library.

SF	F	N	A	SA
10	13	4	0	0

Attendance: 22 + 6

# of Authors: 4

Authors’ position: 4x SF

Outcome: Strong consensus in favor

Outcome

Once the proposal is split, we should discuss the injection mechanism (moving away from UDLs, which is the common practice in other libraries). Matusz's C++ on sea presentation mentioned it, but it was not discussed in the paper). There's also a dependency in https://wg21.link/P1985 (universal template params).

The room was supportive of moving forward with P2980 as the plan. We will need to see papers for each facility, and so we would like to have this proposal split into small papers which can then progress individually.

[inbal2l]

The plan was supported by LEWG. We will see the individual papers once published and after they pass SG6 (and possibly, LEWGI).

[wg21bot]

P2980R1 A motivation, scope, and plan for a quantities and units library (Mateusz Pusz, Dominik Berner, Johel Ernesto Guerrero Peña, Charles Hogg, Nicolas Holthaus, Roth Michaels, Vincent Reverdy)

[rogerorr]

SG23 saw the related paper, P2981R0 in Kona, and we had informal consent that this direction is helpful for security; so I am removing the SG23 label as I do not think we need to see this paper

[mattkretz]

For now, this paper is informational only and not intended to be reviewed in any group.