On Thu, 22 Feb 2024 22:50:03 GMT, Justin Lu <j...@openjdk.org> wrote:
>> Please review this PR which handles an edge case pattern bug with >> ChoiceFormat. >> >> >> var d = new ChoiceFormat("0#foo|1#bar|baz|") // creates cFmt equivalent to >> "0.0#foo|1.0#bar|1.0#" >> d.format(1) // unexpectedly returns "" >> >> >> Not only does this lead to faulty formatting results, but breaks the >> ChoiceFormat class invariant of duplicate limits. >> >> It would have been preferable if either an exception was thrown when the >> ChoiceFormat was initially created, or the ChoiceFormat formatting 1 >> returned a value of "bar". >> >> For comparison, >> >> var d = new ChoiceFormat("0#foo|1#bar|baz") // creates cFmt equivalent to >> "0.0#foo|1.0#bar" >> d.format(1) // returns "bar" >> >> >> After this change, the first code snippet now returns "bar" when formatting >> 1 and discards the "baz" as the second code snippet does. >> >> >> The specific fix for this bug is addressed with the following, on line 305, >> >> if (seg != Segment.FORMAT) { >> // Discard incorrect portion and finish building cFmt >> break; >> } >> >> This prevents a limit/format entry from being built when the current parsing >> mode has not yet processed the limit and relation. The previous >> implementation would build an additional limit/format of 1 with an empty >> string. The `break` allows for the discarding of the incorrect portion and >> continuing. Alternatively an exception could have been thrown. For >> consistency with the second code snippet, the former was picked. >> >> https://github.com/openjdk/jdk/pull/17856 may be of interest, which is a >> semi-related specification fix. > > Justin Lu has updated the pull request incrementally with one additional > commit since the last revision: > > revert enum change LGTM, with a minor suggestion. src/java.base/share/classes/java/text/ChoiceFormat.java line 342: > 340: } else { > 341: num = Double.parseDouble(str); > 342: } Could use enhanced switch? ------------- Marked as reviewed by naoto (Reviewer). PR Review: https://git.openjdk.org/jdk/pull/17883#pullrequestreview-1897207137 PR Review Comment: https://git.openjdk.org/jdk/pull/17883#discussion_r1500096680