Why aren't the emoji modifiers GCB=Extend?

[Karl Williamson]

On 06/20/2015 03:02 AM, Mark Davis ☕️ wrote:
>
> On Sat, Jun 20, 2015 at 12:24 AM, Ken Whistler <kenwhistler at att.net
> <mailto:kenwhistler at att.net>> wrote:
>
>     This results from the fact that the fallback behavior for the
>     modifiers is
>     simply as independent pictographic blorts, i.e. the color swatch images.
>     That is also related to why they are treated as gc=Sk symbol modifiers,
>     rather than as combining marks or format characters.
>
>     If you *support* emoji modifier sequences, then yes, you should treat
>     them as single grapheme clusters for editing -- but their behavior is
>     more akin then to ligatures or conjuncts than to combining character
>     sequences. You need additional, specific
>     knowledge about these sequences -- it doesn't just fall out from a
>     *default* implementation of UAX #29 rules for grapheme clusters.
>
>
> ​Looks like this would be a good FAQ addition...​

Yes please

>
>
>
> Mark <https://google.com/+MarkDavis>
> /
> /
> /— Il meglio è l’inimico del bene —/
> //////