Re: [Haskell-cafe] Grapheme length?

On Feb 20, 2021, at 5:56 AM, Viktor Dukhovni wrote:

But in fact, exactly some of the new code points are relevant for detection of grapheme cluster boundaries (your algorithm looks too naïve) see:

More importantly, the ICU documentation does not recommend working with the underlying low-level properties and rules. Rather the suggested way to traverse a string one grapheme at a time is to use a BreakIterator: https://unicode-org.github.io/icu/userguide/boundaryanalysis/#character-boun... Fortunately, these are also supported: https://hackage.haskell.org/package/text-icu-0.7.0.1/docs/Data-Text-ICU-Brea... So my referral to the "Char" module probably led you astray. Sorry about that... -- Viktor.