Code Question in FAT Filesystem
Eric Norum
wenorum at lbl.gov
Mon Aug 23 18:29:58 UTC 2010
I'm no expert on C++, but for C at least, I don't see any type qualifier being specified more than once:
const char *const foo
declares foo to be a constant pointer to constant character(s)
This is different than
const *bar
which declares bar as a mutable pointer to constant character(s)
or
char *const bletch
which declares bletch as a constant pointer to mutable character(s)
So, with these declarations:
1) bletch could never appear as an lvalue, but *bletch could
2) *bar could never appear as an lvalue, but bar could
2) foo could never appear as an lvalue nor could *foo appear as an lvalue
FWIW.
On Aug 23, 2010, at 11:20 AM, Joel Sherrill wrote:
> Hi,
>
> I came across this while trying to review
> Coverity output.
>
> [joel at iceland dosfs]$ grep "const char const" *
> msdos.h:extern const char const* MSDOS_DOT_NAME; /* ".", padded to MSDOS_NAME chars */
> msdos.h:extern const char const* MSDOS_DOTDOT_NAME; /* ".", padded to MSDOS_NAME chars */
> msdos_misc.c:const char const* MSDOS_DOT_NAME = ". ";
> msdos_misc.c:const char const* MSDOS_DOTDOT_NAME = ".. ";
>
> My understanding is that this is legal in C99 and
> illegal in C++.
>
> Coverity complains it is ...
>
> *dupl_type_qualifier*: type qualifier specified more than once
>
>
> Would it be OK to change these to "const char *MSDOS_DOT_"?
>
> --
> Joel Sherrill, Ph.D. Director of Research& Development
> joel.sherrill at OARcorp.com On-Line Applications Research
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>
>
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--
Eric Norum
wenorum at lbl.gov
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