Files
ladybird/Cargo.lock
Timothy Flynn 86c8a57794 LibJS+LibUnicode: Use icu4x for Temporal calendar operations
Replace the icu4c-based calendar implementation with one built on the
icu4x Rust crate (icu_calendar).

The icu4c API does not expose the píngqì month-assignment algorithm
used by the Chinese and Dangi lunisolar calendars. Our old code had to
approximate this by walking months via epoch millisecond arithmetic and
manually tracking leap month positions, which produced incorrect month
codes and ordinal month numbers for certain years. The icu4x calendar
crate handles píngqì natively.

With this patch, which is almost a 1-to-1 mapping of ICU invocations, we
pass 100% of all Temporal test262 tests.

The end goal might be to use icu4x for all of our ICU needs. But it does
not yet provide the APIs needed for all ECMA-402 prototypes.
2026-03-11 07:09:57 -04:00

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9.0 KiB
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