• Nick Sabalausky (15/16) Oct 31 2012 Little rusty on C, so not sure if this is a compiler bug or not (I'm
• Nick Sabalausky (6/16) Oct 31 2012 I should point out I came across that in an existing C lib, a release

Nick Sabalausky <SeeWebsiteToContactMe semitwist.com> writes:

Little rusty on C, so not sure if this is a compiler bug or not (I'm
using DMC 8.42n):

------------------------------------
typedef struct {
    int a;
} Foo;

int bar = (sizeof ((Foo*)0)->a);
------------------------------------

 dmc -c test.c

int bar = (sizeof ((Foo*)0)->a);
                            ^
m.c(5) : Error: ')' expected
--- errorlevel 1

FWIW, Adding an additional set of parens like below gets around the
error:

int bar = (sizeof (((Foo*)0)->a));

Nick Sabalausky <SeeWebsiteToContactMe semitwist.com> writes:

On Wed, 31 Oct 2012 03:29:50 -0400
Nick Sabalausky <SeeWebsiteToContactMe semitwist.com> wrote:

 Little rusty on C, so not sure if this is a compiler bug or not (I'm
 using DMC 8.42n):
 
 ------------------------------------
 typedef struct {
     int a;
 } Foo;
 
 int bar = (sizeof ((Foo*)0)->a);
 ------------------------------------


I should point out I came across that in an existing C lib, a release
version, so presumably it works on at least *some* C compiler. Just not
sure whether or not it *should* work, or (for all I know) maybe it's
one of those "undefined" areas of the langauge.