cvs commit: fptools/libraries/base/GHC Unicode.hs

[Simon Marlow]

On 12 November 2004 16:21, Ross Paterson wrote:

> On Fri, Nov 12, 2004 at 07:14:17AM -0800, Simon Marlow wrote:
>>   Modified files:
>>     libraries/base/GHC   Unicode.hs
>>   Log:
>>   Note Haskell 98 divergence in isAlpha.
> 
> I was hoping you'd change it to remove the divergence, either by
> defining 
> 
> 	isAlpha c = isUpper c || isLower c
> or
> 	isUpper c = isAlpha c && not isLower c
> 
> The most sensible meaning for isAlpha seems to be the Unicode Letter
> category, which falls between glibc's implementation of these two,
> though the second is closer.  (isAlphaNum is not affected)

I thought (naively?) that glibc's implementation of iswalpha() would be
more correct than isUpper || isLower.

If you think that the H98 defn of isAlpha is more correct, then I'm
happy to go with that.

Cheers,
	Simon