Question in-line.
Best regards
Michael
On Feb 12, 2007, at 3:39 PM, Gerhard Gappmeier wrote:
>
>> In fact it should be used like:
>>
>> void method(int foo _U_)
>>
>> which should become
>>
>> void method(int foo __attribute__((unused)))
>>
>> I'm not sure if _U_ is implemented for anything other than GCC,
>> though.
>> What compiler are you using?
>>
> ok, I See.
> I'm using MSVC6 on XP and GCC on Gentoo.
> I just want a solution that works on every platform.
>
> I didn't know this unused attribute of GCC,
> but referencing the variable in the code is normally a good idea.
>
> MSVC does not complain at all until you use warning level 4, what I
> generally do.
> void method(int foo)
> {
> foo;
> }
> does the job for MSVC
> But this causes a "statement has not effect" waning with gcc -Wall.
>
> void method(int foo)
> {
> (void)foo;
> }
> does the job for both.
>
> So
> #define REFERENCE_PARAMETER(name) (void)name;
> works good for me.
> void method(int foo)
> {
> REFERENCE_PARAMETER(foo);
> }
>
> The intel compiler is a little bit different, that's why trolltech
> uses
> this kind of define.
>
> #if defined(Q_CC_INTEL) && !defined(Q_OS_WIN)
> template <typename T>
> inline void qUnused(T &x) { (void)x; }
> # define Q_UNUSED(x) qUnused(x);
> #else
> # define Q_UNUSED(x) (void)x;
> #endif
Isn't it C++? Wireshark uses only C.
>
>
> Are there any reasons to not use such a kind of macro?
>
>
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