<div dir="ltr">I see. You are right. Fixed the comment. </div><div class="gmail_extra"> <div class="gmail_quote">On Sat, Mar 31, 2018 at 3:33 AM, Richard Wordingham <<a href="mailto:richard.wordingham@ntlworld.com" target="_blank">richard.wordingham@ntlworld.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Fri, 30 Mar 2018 18:15:13 -0500 Nathan Willis <<a href="mailto:nwillis@glyphography.com">nwillis@glyphography.com</a>> wrote: > If the rule was that only <Modern,Modern,Modern> would compose into > something in the Syllables block, that would make total sense to me. > But the comment makes it sound like <Old,Old,Modern> also maps to > stuff in the Syllables block and that it's only the Old Ts that are > excluded. That's what I don't understand. The comment is explaining which <LV,T> combinations compose at the character level. I think you will find that LV combinations only exist for <Modern,Modern> combinations. It is at that level that <Old,Old,Modern> is excluded. What you seem to be after is a change to the text on line 1154 from "Only the <L,V> sequences for the 11xx ranges combine." to "Only the <L,V> sequences for parts of the 11xx ranges combine." or "Only the <L,V> sequences for some L and some V combine." The interesting bit of Unicode history is why the consortium caved in to Korean demands for the full set of <modern, modern, modern> to be included. An uninteresting bit of HarfBuzz archaeology would be whether someone briefly thought that the all L and V in the Hangul Jamo block composed at the character level. Richard. <div class="HOEnZb"><div class="h5"> _______________________________________________ HarfBuzz mailing list <a href="mailto:HarfBuzz@lists.freedesktop.org">HarfBuzz@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/harfbuzz" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/harfbuzz</a> </div></div></blockquote></div> -- <div class="gmail_signature" data-smartmail="gmail_signature">behdad <a href="http://behdad.org/" target="_blank">http://behdad.org/</a></div> </div>