VLERange: a range in between BidirectionalRange and RandomAccessRange

[spir]

On 01/17/2011 05:34 PM, Michel Fortin wrote:
> As I said: all those people who are not validating the inputs to make
> sure they don't contain combining code points. As far as I know, no one
> is doing that, so that means everybody should use algorithms capable of
> handling multi-code-point graphemes. If someone indeed is doing this
> validation, he'll probably also be smart enough to make his algorithms
> to work with dchars.

Actually, there are at least 2 special cases:
* apps that only deal with pre-unicode source stuff
* apps that only deal with source stuff "mechanically" generated by 
text-producing software which itself guarantees single-code-only graphemes

Denis
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