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LibJS: Implement Temporal.Calendar.prototype.yearMonthFromFields()

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Linus Groh 2021-08-16 00:35:05 +01:00
parent c1c12497b5
commit ed9d37bd40
10 changed files with 223 additions and 14 deletions
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8
Userland/Libraries/LibJS/Runtime/Temporal/PlainDate.cpp
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@ -237,18 +237,18 @@ bool is_valid_iso_date(i32 year, u8 month, u8 day)
}
// 3.5.6 BalanceISODate ( year, month, day ), https://tc39.es/proposal-temporal/#sec-temporal-balanceisodate
ISODate balance_iso_date(i32 year, i32 month, i32 day)
ISODate balance_iso_date(double year_, double month_, double day)
{
// 1. Assert: year, month, and day are integers.
// 2. Let balancedYearMonth be ! BalanceISOYearMonth(year, month).
auto balanced_year_month = balance_iso_year_month(year, month);
auto balanced_year_month = balance_iso_year_month(year_, month_);
// 3. Set month to balancedYearMonth.[[Month]].
month = balanced_year_month.month;
auto month = balanced_year_month.month;
// 4. Set year to balancedYearMonth.[[Year]].
year = balanced_year_month.year;
auto year = balanced_year_month.year;
// 5. NOTE: To deal with negative numbers of days whose absolute value is greater than the number of days in a year, the following section subtracts years and adds days until the number of days is greater than −366 or −365.