casts in function-pointer arguments

[DoraC]

Hi,

I'm a little perplexed about the following...

I've seen (and been able to do and work-with) casts along
the lines of

    char** ppcVar;
    void** ppvVar;
    
    ...

    ppvVar = ppcVar;

and all is well..

However, if I have function prototypes

    void function( char*, char** );
    void function2( void (*)( void*, void** ) );

and I try to do the following...

    function2( (void (*)( void*, void** )) function );

the compiler compains (of course I've defined the functions
elsewhere).

It works fine if I change void** to char**. Why can't I
cast the types in this fashion when they are arguments to
functions?

Thanks!
perplexed -
dora c.

 

[gasingh]

Hi Dora C,
It seems that you have some compiler that is too strict on this. Well I tried this on a compiler and it worked fine after compilation. There were no warnings and nothing. Either you have turned on some more strict compilation options or your compiler is as such strict. Try with some other compiler and see.

Hope this helps.

 

[Salem]

> the compiler compains
Please post the error message and state your compiler.

Your function pointer cast seems OK, well VC7.1 didn't complain.



--

http://www.catb.org/~esr/faqs/smart-questions.html