----- Original Message -----
From: "Dan Nelson" <[EMAIL PROTECTED]>
To: "Larry Lile" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Tuesday, October 03, 2000 9:49 PM
Subject: Re: Question about -Wchar-subscripts
> In the last episode (Oct 03), Larry Lile said:
> >
> > ...we get scores of warnings about using characters as subscripts
> > to an array (-Wchar-subscripts), which generates so much noise as
> > to mask real warnings burried within. Therefore, I would like to
> > suppress this warning unless someone can explain why using a char
> > as an array subscript is in any way an illegitimate thing to do.
> > As far as I can tell, getting rid of the warning by changing the
> > code would require adding a large number of frivolous casts to
> > scores of source files...
> >
> > So why is using a "char" as an array subscript wrong? I had always
> > avoided it because the compiler complained and that was good enough
> > for me.
>
> Because your char value could be negative and end up referencing memory
> before your array start. Mainly a problem with the ctype macros and
> high-ascii characters.
>
How about unsigned char? Could that be used for index?
Leif
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