P2418 Add support for std::generator-like types to std::format

[wg21bot]

P2418R0 Add support for std::generator-like types to std::format (Victor Zverovich)

[brycelelbach]

2021-08-31 Library Evolution Telecon

P2418R0: Add support for std::generator-like types to std::format

2021-08-31 Library Evolution Telecon Minutes

Chair: Inbal Levi

Champion: Victor Zverovich

Minute Taker: Ben Craig

Summary

The paper proposes a fix to std::format, which will allow formatting a wider range of facilities (and will align std::format with {fmt}'s current behavior)

The topic of accepting this as a DR to C++20 was broadly discussed (and in particular, with the affected parties), as well as the consequences for not doing so.

The general notion was in favor of having the proposed fix as a DR to C++20 (as well as ship it to C++23)

POLL: Send P2418R0 (Adding support for std::generator to std::format) to LWG for C++23 and as a DR for C++20, treated as an urgent matter.

Strongly Favor	Weakly Favor	Neutral	Weakly Against	Strongly Against
11	5	1	0	0

Neutral: Concerned with format implementation. Not pleased with retroactive changes (But don't want to give off the impression that it will be vetoed)

Attendance: 22

# of Authors: 1

Author Position: SF

Outcome: Consensus in favor

Outcome

Taking library implementers' request to finalize C++20's API & ABI under consideration, the paper will be voted on in a special library evolution electronic poll (starting on the 2021-09-10).