> Please review this PR which adds the method `caseFoldLanguageTag(String > languageTag)` to java.util.Locale. > > This method case folds a language tag to adhere to _[section 2.1.1. > Formatting of Language Tags of > RFC5646](https://www.rfc-editor.org/rfc/rfc5646.html#section-2.1)_. This > format is defined as _"All subtags, including extension and private use > subtags, use lowercase letters with two exceptions: two-letter and > four-letter subtags that neither appear at the start of the tag nor occur > after singletons. Such two-letter subtags are all uppercase ... and > four-letter subtags are titlecase."_. > > > In order to match the behavior of existing language tag related Locale > methods, this method matches the 2.1.1 RFC5646 specification with the > following **exceptions**: > - Will not case fold variant subtags > - Will not case fold private use subtags prefixed by "lvariant" > > As an example, > `caseFoldLanguageTag("ja-kana-jp-x-lvariant-Oracle-JDK-Standard-Edition")` > returns _"ja-Kana-JP-x-lvariant-Oracle-JDK-Standard-Edition"_. Further > examples can be seen in the test file.
Justin Lu has updated the pull request incrementally with four additional commits since the last revision: - Review comment: Replace wellFormed with parseSts to pass errorMsg to exception - Review comment: Adjust method names - Review comment: Use assertThrows and correct IAE to ILE - Review comment: improve legacy_tags id ------------- Changes: - all: https://git.openjdk.org/jdk/pull/13679/files - new: https://git.openjdk.org/jdk/pull/13679/files/63fe500e..34ccd3be Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=13679&range=03 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13679&range=02-03 Stats: 27 lines in 3 files changed: 5 ins; 7 del; 15 mod Patch: https://git.openjdk.org/jdk/pull/13679.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/13679/head:pull/13679 PR: https://git.openjdk.org/jdk/pull/13679
