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Section: 27.13 [time.parse] Status: C++20 Submitter: Tomasz Kamiński Opened: 2019-06-29 Last modified: 2021-02-25
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The year format specifier ('y', 'Y') are missing the locale alternative
version ('%EY', '%Ey' and '%Oy'). That makes it inconsistent with the
%Ey Replaced by the offset from %EC (year only) in the locale's alternative representation.
%EY Replaced by the full alternative year representation.
%Oy Replaced by the year (offset from %C) using the locale's alternative numeric symbols.
parse specifiers 27.13 [time.parse] that accepts these modified command.
[2019-07 Issue Prioritization]
Status to Tentatively Ready after five positive votes on the reflector.
This wording is relative to N4820.
[Drafting note: For the '%Oy' specifier we preserve consistency with the current specification for '%Od' and '%Oe' from Table 87 "Meaning of
formatconversion specifier" [tab:time.format.spec]:
%d […] The modified command
%Odproduces the locale's alternative representation.
%e […] The modified command
%Oeproduces the locale's alternative representation.
as their corresponding POSIX specification is matching one for '%Oy':
%Od Replaced by the day of the month, using the locale's alternative numeric symbols, filled as needed with leading zeros if there is any alternative symbol for zero; otherwise, with leading <space> characters.
%Oe Replaced by the day of the month, using the locale's alternative numeric symbols, filled as needed with leading <space> characters.
Modify "Table 87 — Meaning of
format conversion specifiers"
[tab:time.format.spec] as indicated:
Table 87 — Meaning of format conversion specifiers [tab:time.format.spec] Specifier Replacement […] %y The last two decimal digits of the year. If the result is a single digit it is prefixed by 0. %Y The year as a decimal number. If the result is less than four digits it is left-padded with 0 to four digits. […]