hrmpf, the MacOS/iOS NSString class is UTF-16, and there I was hoping that Windows is the only platform with broken unicode support 
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...what I'd need is a simple way to loop over UTF-32 characters in the NSString, I'm aware that I can decode into an NSData object with any encoding, but that's a bit awkward :D
You can read more about the history of NSString here: https://www.objc.io/issues/9-strings/unicode/ …, but generally speaking, a list of code points (≠ characters) isn’t what you want, regardless of encoding. Unless you’re writing your own shaping/layout engine, which is a Very Hard Problem.
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It's not for rendering but for converting the input of a text field into UTF-32 code points, that's how I'm handing input from sokol_app.h to the user code (UTF-32 because it's a fixed length encoding where one code-point is always one code-unit), for everything else I use UTF-8
Thanks. Twitter will use this to make your timeline better. UndoUndo
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Well, he's doing UI so very likely he actually wants code units
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What do you do with code points once you get them? If the answer is “index into an atlas or glyph array,” you’re Doing It Wrong.
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You mean because of combining characters?
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Combining characters are but one issue in complex text layout. https://en.m.wikipedia.org/wiki/Complex_text_layout …
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Ah right, I forgot. I rely on HarfBuzz for that
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And what do you give to HarfBuzz to get a sequence of glyph shapes? It doesn’t require enumerating code points manually.
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To HarfBuzz I send the full substring (icu's ubidi separates ltr from rtl). I need code unit access for caret navigation in a basic editbox
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Admittedly that works for the most basic cases, but even if you use a sane canonicalization, you still have to contend with the fact that Codepoints Aren’t Characters, and there are many instances where you don’t want an insertion point between them.
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