On Fri, 22 Dec 2017 17:44:39 +0200 Eli Zaretskii via Unicode <unicode@unicode.org> wrote:
> You can always delete a codepoint at a given position in Emacs, > specifying the position by its number, but there are no user-level > commands to conveniently allow doing that in the middle of a grapheme > cluster. > > It was never requested nor deemed necessary to provide such a > capability. Kenichi Handa provided such a capability for Emacs, but it has not been accepted for the main line. I am using a version of his code which he kindly provided for my own editing. The discussion is available at https://debbugs.gnu.org/cgi/bugreport.cgi?bug=20140 . The figure attached to it shows stepping through a 7-character (6 graphic and one 'invisible' stacker) akshara. > Normally, replacing some portions of a grapheme cluster > produces a radically different display, so it makes more sense to > delete everything and start anew. Non sequitur. > Deleting individual codepoints by > Backspace is useful for accents and diacritics, which generally are > input after the base characters, so that is provided. Don't forget that a cluster can be a large constellation of characters. Richard.
