Quote:

But I am not at the moment sure whether combining characters are the only source of multi-codepoint graphemes.

Yeah, there are at least surrogate pairs (Since U++ use 16-bit wchar), ligatures and IIRC some hangul graphemes. Anything else that I miss?

Surrogate pairs are rather well formed, but ligatures and multi-codepoint CJK/Devanagari stuff may pose problems...


Edit: Ah yes, what I miss is explained under the grapheme clusters section: http://www.unicode.org/reports/tr29/#Grapheme_Cluster_Bounda ries