Section: 220.127.116.11 [format.string.std] Status: WP Submitter: Zhihao Yuan Opened: 2021-11-30 Last modified: 2022-02-10 12:58:57 UTC
Priority: Not Prioritized
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P1652R1 prints integral inputs as characters with 'c' and preserves the wording to treat bool as a one-byte unsigned integer; this accidentally asks the implementation to cast bool into a 1-bit character if a user asks for the 'c' presentation type.Recent wording improvements made this implied behavior obvious.
[2021-12-04; Daniel comments]
This issue relates to LWG 3644.
[2022-01-30; Reflector poll]
Set status to Tentatively Ready after five votes in favour during reflector poll.
[2022-02-10 Approved at February 2022 virtual plenary. Status changed: Tentatively Ready → WP.]
This wording is relative to N4901.
Modify 18.104.22.168 [format.string.std], Table 67 [tab:format.type.bool], as indicated:
Table 67 — Meaning of type options for bool [tab:format.type.bool] Type Meaning none, s Copies textual representation, either true or false, to the output. b, B, c,d, o, x, X As specified in Table 65 [tab:format.type.int] for the value static_cast<unsigned char>(value).