RFR: 8303018: Unicode Emoji Properties [v2]

[Eirik Bjorsnos]

On Tue, 14 Mar 2023 15:49:56 GMT, Naoto Sato <naoto at openjdk.org> wrote:

>> Proposing accessor methods to Emoji properties defined in [Unicode Technical Standard #51](https://unicode.org/reports/tr51/) in `java.lang.Character` class. This is per a request from the client group, as well as refining the currently existing ad-hoc emoji implementation in regex. A CSR has also been drafted, and I would appreciate reviews for it too.
>
> Naoto Sato has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fixed method descriptions

Would it make sense to add something like the following to `GenerateCharacter.propertiesComments`?


if ((val & maskEmoji) == maskEmoji) {
    result.append(", emoji ");
}
if ((val & maskEmojiPresentation) == maskEmojiPresentation) {
    result.append(", emojiPresentation ");
}
if ((val & maskEmojiModifier) == maskEmojiModifier) {
    result.append(", emojiModifier ");
}
if ((val & maskEmojiModifierBase) == maskEmojiModifierBase) {
    result.append(", emojiModifierBase ");
}
if ((val & maskEmojiComponent) == maskEmojiComponent) {
    result.append(", emojiComponent ");
}
if ((val & maskExtendedPictographic) == maskExtendedPictographic) {
    result.append(", extendedPictographic ");
}


This updates the comments of the B table to something like this sample:


0x0000,  //  34   unassigned, L
0x0440,  //  35   unassigned, L, emoji , emojiComponent
0x0000,  //  36   unassigned, L

-------------

PR: https://git.openjdk.org/jdk/pull/13006