P2291 Add Constexpr Modifiers to Functions `to_chars` and `from_chars` for Integral Types in `<charconv>` Header

[wg21bot]

P2291R0 Add Constexpr Modifiers to Functions to_chars and from_chars for Integral Types in <charconv> Header (Daniil Goncharov, Karaev Alexander)

[cor3ntin]

Mailing list review Summary:

• No implementation concerns for libstdc++, should be possible for libc++ too
• Please put the wording in code font
• Use __cpp_lib_constexpr_charconv as feature macro

No further comment that would indicate interest

Direction: Update the wording and send to a LEWG telecon