------- Comment #5 from h dot b dot furuseth at usit dot uio dot no 2006-10-17
12:49 -------
Subject: Re: Issues with -Wchar-subscripts
pinskia at gcc dot gnu dot org writes:
> 'a' in C is not of the type char but instead int so not warning
> there is correct really.
How about a -Warray-bounds option, maybe in -Wall, which tries to
catch array[negative index] and (when the array length is known)
array[too large positive index]? That will also catch array['\300']
when the program meets a host where char is signed.
It'll give false alarms for fake variable-length arrays, but those are
not common and can be replaced with the real thing now. This, I mean:
struct Foo { blah blah; char array[1]; };
struct Foo *foo = malloc(sizeof(struct Foo) + strlen(str));
strcpy(foo->array, str);
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29455
