19 Feb
2015
19 Feb
'15
5:42 a.m.
On 2015-02-19 at 06:19:18 +0100, Kazu Yamamoto (山本和彦) wrote:
It seems to me that some characters of GHC 7.10.1RC2 behave differently from those of GHC 7.8.4:
7.8.4 7.10.1RC2 isLower (char 170) True False
Fwiw, the motivation for that particular change may be (I'm just guessing here) to have the following condition hold: \c -> isLower c `implies` (not . isLower . toUpper) c i.e. if something is 'lower-case', then applying 'toUpper' should result in a character that is not 'lower-case' anymore. This didn't hold with 7.8.4's Unicode 6, but now holds with 7.10.1's Unicode 7 definitions. Cheers, hvr