[ansi-test-devel] Unicode, CHAR-UPCASE/CHAR-DOWNCASE and char-upcase.1/char-upcase.2

[Raymond Toy]

On 4/3/10 7:00 PM, Erik Huelsmann wrote:
> Ever since ABCL raised its CHAR-CODE-LIMIT from 256 to #x10000, 2
> tests started failing: char-upcase.1 and char-upcase.2.
>
> These 2 tests iterate through all integers between 0 and
> CHAR-CODE-LIMIT. While doing so, they test for the property that
> upcasing and downcasing returns the same character again
> ("round-tripping"). This property of characters is specified in
> section 13.1.4.3
> (http://www.lispworks.com/documentation/lw51/CLHS/Body/13_adc.htm)
> "Characters with case". In short: characters with case are defined in
> pairs; additional characters with case have to be defined in pairs
> too.
>   
But doesn't 13.1.4.3 also say characters with case are a subset of
alphabetic characters, and the glossary says alphabetic characters are
A-Z and a-z or any other implementation-defined character with case or
other graphic character defined by the implementation to be alphabetic. 
So doesn't this mean the implementation can define the dotless-i
character as a non-alphabetic?  I guess that would also imply that
alpha-char-p return non-NIL for such characters.

Ray