Combining Grapheme Joiner (U+034F) is probably what you want as it is default ignorable and keeps the acute on top of the E. However it nay break languages with di- and trigraphs or complex diacritics.
Best regards Marius > Gesendet: Samstag, 22. Juni 2019 um 02:14 Uhr > Von: "Sławomir Osipiuk via Unicode" <unicode@unicode.org> > An: unicode@unicode.org > Betreff: Unicode "no-op" Character? > > Does Unicode include a character that does nothing at all? I'm talking about > something that can be used for padding data without affecting interpretation > of other characters, including combining chars and ligatures. I.e. a > character that could hypothetically be inserted between a latin E and a > combining acute and still produce É. The historical description of U+0016 > SYNCHRONOUS IDLE seems like pretty much exactly what I want. It only has one > slight disadvantage: it doesn't work. All software I've tried displays it as > an unknown character and it definitely breaks up combinations. And U+0000 > NULL seems even worse. > > > > I can imagine the answer is that this thing I'm looking for isn't a > character at all and so should be the business of "a higher-level protocol" > and not what Unicode was made for. but Unicode does include some odd things > so I wonder if there is something like that regardless. Can anyone offer any > suggestions? > > > > Sławomir Osipiuk > >