On Mon, 6 May 2024 17:53:56 GMT, Naoto Sato <na...@openjdk.org> wrote:
> This PR is to implement the `nonlikelyScript` feature that went into CLDR > version 45 for migration purposes. In its release note, it states > (https://cldr.unicode.org/index/downloads/cldr-45): > > Migration > Changes to parentLocales require upgrading implementations that use that > element. In particular, they need to support the new nonlikelyScript value, > and use the appropriate explicit inheritance for each type of inheritance. > The v44 list of locales that inherit directly from root is retained for this > release, but will disappear in the future. So implementations should move as > quickly as possible to support the new value > > For example in `Russian` locales fallback, its likely script is `Cyrl` > (Cyrillic). Thus Russian locales with non-likely script, such as 'ru-Latn' > (Russian in Latin script) should fallback directly to `root`, bypassing `ru` > (Russian). CLDR has explicit parent locales for this nonlikely scripts, such > as `zh-Hant` -> `root` already, but the release note suggests this will go > away, and JDK needs to logically handle these non-likely script inheritance > cases. > > To implement this behavior, CLDRConverter build tool now generates the > `LocaleDataMetaInfo` for java.base module with the new `likelyScriptMap`, > which maps the script to its likely languages. Since the map is big, it is > lazily initialized when needed. The map is used at runtime to determine the > parent locale fallback based on implicit/explicit nonlikely Script > inheritance. Marked as reviewed by joehw (Reviewer). ------------- PR Review: https://git.openjdk.org/jdk/pull/19108#pullrequestreview-2042157221
