So apparently perl6 is also "wrong" and operates on codepoints
Yes and no. Yes, because the in-development Rakudo compiler is clearly currently giving the wrong result, and no because it operates on grapheme clusters (but has bugs).
(You can work with codepoints if you really want to but the normal string/character functions that use the normal string type, Str, work -- or more accurately are supposed to work -- on the assumption that "character" == grapheme cluster; afaik it's supposed to match the Unicode default Extended Grapheme Cluster specification.)
Comments
Yes and no. Yes, because the in-development Rakudo compiler is clearly currently giving the wrong result, and no because it operates on grapheme clusters (but has bugs).
(You can work with codepoints if you really want to but the normal string/character functions that use the normal string type, Str, work -- or more accurately are supposed to work -- on the assumption that "character" == grapheme cluster; afaik it's supposed to match the Unicode default Extended Grapheme Cluster specification.)
Fwiw I've filed a bug: https://rt.perl.org/Ticket/Display.html?id=125927