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chrono-spec
grammar ambiguity in §[time.format]Section: 29.12 [time.format] Status: C++20 Submitter: Victor Zverovich Opened: 2019-07-24 Last modified: 2021-02-25
Priority: 0
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Discussion:
The chrono-spec
grammar introduced by P1361R2 "Integration
of chrono with text formatting" in section [time.format] is ambiguous because '%'
can be
interpreted as either literal-char
or conversion-spec
:
chrono-spec ::= literal-char | conversion-spec literal-char ::= <a character other than '{' or '}'> conversion-spec ::= '%' [modifier] type
[2019-08-17 Issue Prioritization]
Status to Tentatively Ready and priority to 0 after five positive votes on the reflector.
Proposed resolution:
This wording is relative to N4830.
Modify the literal-char
grammar in 29.12 [time.format] as indicated:
literal-char: any character other than{
,or}
, or %