[tz] C++20 time library
eggert at cs.ucla.edu
Tue Sep 21 16:59:52 UTC 2021
On 9/21/21 9:29 AM, Howard Hinnant wrote:
> Agreed that the link part of the database may be zero-sized on some platforms.
That's fine, but could a note or footnote be added to that effect? For
example, the text should make it clear that even given the same tzdb
version, the same entry could be a Zone on one platform and a Link on
> This part of the library is specified to be interoperable with Unix Time (http://eel.is/c++draft/time.clock.system#overview-1). Thus leap seconds are excluded by design.
Ah, OK. Unfortunately that's not obvious from the text, which has an
extensive discussion of leap seconds.
I suggest adding some text that makes it clear that the leap second
interfaces are only for interrogating tzdb, and that leap seconds are
not used by the conversion functions. For example, it should be clear
what conversion functions do when given a tzdb entry that has leap
seconds - do they ignore the leap seconds, or report an error, or what?
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