VLERange: a range in between BidirectionalRange and RandomAccessRange

[spir]

On 01/14/2011 07:33 AM, Andrei Alexandrescu wrote:
> Thanks. One further question is: in the above example with
> u-with-umlaut, there is one code point that corresponds to the entire
> combination. Are there combinations that do not have a unique code point?

See my previous follow-up to nick's explanation. But the answer is yes, 
not only for usual characters, but due to the fact that a user is, 
theoratically and practically, totally free to combine base ad combining 
codes --even to invent chracters. The only limit is that fonts will not 
know how to display unprobable combinations.
(See also my presentation text, shows an example of dots below and above 
greek letters.)

Denis
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