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Guard against Posix::time_zone having transition near ...

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beginning or end of year.
This commit is contained in:
Howard Hinnant 2023-02-06 14:29:35 -05:00
parent 5f8c904231
commit 28972d72b4
1 changed files with 5 additions and 0 deletions
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5
include/date/ptz.h
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@ -452,6 +452,10 @@ time_zone::get_info(date::sys_time<Duration> st) const
if (start_rule_.ok()) if (start_rule_.ok())
{ {
auto y = year_month_day{floor<days>(st)}.year(); auto y = year_month_day{floor<days>(st)}.year();
if (st >= get_next_start(y))
++y;
else if (st < get_prev_end(y))
--y;
auto start = get_start(y); auto start = get_start(y);
auto end = get_end(y); auto end = get_end(y);
if (start <= end) // (northern hemisphere) if (start <= end) // (northern hemisphere)
@ -505,6 +509,7 @@ time_zone::get_info(date::sys_time<Duration> st) const
} }
else else
r = contant_offset(); r = contant_offset();
assert(r.begin <= st && st < r.end);
return r; return r;
} }