Mohanlal Jangir schrieb:
On 4/6/07, John (Eljay) Love-Jensen <eljay@xxxxxxxxx> wrote:
Hi Mohanlal,
That warning was introduced in GCC 3.4.
HTH,
--Eljay
Hi Eljay,
With same compiler, following program works well (compiles as well as
gives warning)
#include <stdio.h>
class myClass {
public:
int count() __attribute__((warn_unused_result));
};
[...]
The only problem is, the program does not work if I define the method
inside the class. Any clue ??
It is syntactically not possible to place attributes between the function
head and the definition in gcc. The usual solution is to put it somewhere
else. Have you tried:
class myClass {
public:
int __attribute__((warn_unused_result)) count()
{
return printf("hello world\n");
}
};
The gcc manual is a bit misleading here, as it presents only examples where
attributes are used in a function declaration and does not discuss how to
use them in a definition-is-implicit-declaration situation.
I haven't tried the above with this particular attribute, but it works well
with other function-relevant attributes such as always_inline.
Daniel
