Re: Strange C constructs

Derek M Jones wrote:
>> Another question may be easier to answer:
>>
>> typedef int (procname)(int arg);
>>
>> According to K&R only /pointers/ to procedure-types can be constructed.
>
> Hang on. I thought you were a fan of standards?
>
>> Does there exist newer specs which allow to typedef procedures
>> themselves?
>
> If you mean C99, then no. If you mean vendor extensions, I cannot
> think of any.


Hmm? Function types can certainly be typedef-ed in C99 (and C89). I
do it quite often, in fact, since I dislike hiding the fact that
there's a pointer involved:


        typedef void comparison_t(const void *, const void*);
        void sort(void *sequence, size_t length, comparison_t *compare);


You can use any type in C typedef definitions; you can even say


      typedef void object;


if you're so inclined.


Jeremy

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