Thread-topic: Prevent warnings on forward struct declaration
User-agent: Microsoft-Entourage/11.2.1.051004
> Hi,
>
>> typedef void (*SomeCompletionProcPtr) (struct SomeControlBlock *dInfo);
>>
>> typedef struct SomeControlBlock
>> {
>> --- more stuff here ---
>> }
>> SomeControlBlock, *SomeControlBlock;
>>
>> So I have a struct and one of its variables is a pointer to a function whose
>> parameter is a pointer to the struct.
>> The forward declaration (with "struct" in the param list) works, but Xcode
>> generates a warning:
>>
>> warning: its scope is only this definition or declaration, which is probably
>> not what you want
>> warning: 'struct SomeControlBlock' declared inside parameter list
>
>
>
> This doesn't answer your question about turning off the warning,
> but FWIW, you could just forward declare:
>
> struct SomeControlBlock;
>
> by itself before everything.
> You can even typedef a forward-declared struct (before it's defined):
>
> typedef struct SomeControlBlock SomeControlBlock;
>
> (I'm assuming compiling "C" and not "C++".)
>
> (and I just happen to be fixing things like this at the moment with
> someone else's legacy source code...)
>
> David Fang
'tis the solution. Xcode is not real fun after something like a decade with
CW. ;-)
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