[XeTeX] combined accents

[David J. Perry]

----- Original Message ----- 
> This font has precomposed "Latin small letter a with macron and acute"
> ( \char"0F01 resp. \XeTeXglyph3066 ).
>
The makers of this font have placed their a-macron-acute at a codepoint 
assigned to another character in Unicode; very, very bad practice.  One can 
always create a character that does not exist in Unicode in the Private Use 
Area, if absolutely necessary, but it's better to use existing characters if 
possible.  If one uses the precomposed a-macron followed by a combining 
acute (or 'a' plus combining macron and combining acute), the meaning of the 
text will always be clear even if the display is not perfect.  Using a PUA 
value (or a wrongly encoded font such as TLL) will result in nonsense if the 
person viewing the document does not have the customized font on his/her 
system.

David