[Issue 9447] iota should generate char intervals too

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http://d.puremagic.com/issues/show_bug.cgi?id=9447


Andrej Mitrovic <andrej.mitrovich at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |andrej.mitrovich at gmail.com


--- Comment #1 from Andrej Mitrovic <andrej.mitrovich at gmail.com> 2013-02-04 10:15:42 PST ---
The reason I mentioned Unicode in Issue 8920 is because I'm unsure whether
simply incrementing the integral value of a character will produce a valid
character (valid in how the Unicode standard defines it). 

For ASCII 'a'--'z' it's likely not an issue, but I'm thinking about the case of
wchars and dchars. E.g. we would probably have to use isValidDchar.

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