mhc@arrow.UUCP (MH Cox) (02/02/88)
I was re-compiling some of my friends code with my shiney new MSC 5.0
compiler, when I received a peculiar fatal syntax error. I won't
reproduce all the code exactly, but it went something like this:
typedef struct
{
int some;
char stuff;
}
some_stuff;
typedef struct
{
some_stuff some_stuff; /* same name, no error */
some_stuff *p;
}
OKAY;
typedef struct
{
some_stuff embedded_struct;
some_stuff *some_stuff; /* syntax error! */
}
BAD;
I realize using a struct member name that's the same as a data type is not
a very good idea. But, the above code compiles successfully under
MSC 4.0!?! Is this an MSC 5.0 bug or a new ANSI feature? The last time
I read the proposed ANSI standard (many moons ago), the above would be
syntactically correct.
BTW, we compared the code+data sizes of MSC 5.0 vs. MSC 4.0
expecting to see *some* size reduction. Both compilations used the -Os
space-over-time optimization and -Gs disable-stack-overflow-check
switches (NOTE: the MSC 4.0 compiler defaults to -Os while the MSC 5.0
defaults to -Ot). Including some other optimizations (-Oali) made the
MSC 5.0 sizes even larger (as expected).
I think I'm going back to 4.0 ...
--
Michael H. Cox
(201) 580-8622