Re: main function address

From: Leor Zolman (leor_at_bdsoft.com)
Date: 04/07/04 

Date: Wed, 07 Apr 2004 12:58:56 GMT

On Wed, 07 Apr 2004 07:47:04 -0400, Lew Pitcher <Lew.Pitcher@td.com> wrote:
.
>
>In 9989-1999 (admittedly, just the draft C99 standard, and not the
>/actual standard itself), the printf() function documentation in
>7.19.6.3 refers the reader to the fprintf() documentation for a
>description of it's input. The fprintf() documentation in 7.19.6.1 says
>of the %p format
>
>~ p The argument shall be a pointer to void. The value of the pointer is
>~ converted to a sequence of printing characters, in an
>~ implementation-defined manner.
>
>So, to satisfy the %p format character, the argument to
>fprintf()/printf() /must/ be a "pointer to void". Since main is a
>"pointer to function returning int", and not a "pointer to void", I
>interpreted the documentation as requiring a cast to void pointer.

Curious -- I've never considered how implicit conversion rules ought to
play out in the arena of variadic functions... on one hand, pointers to
/anything/ implicitly convert to pointer-to-void, but on the other hand
there's no declaration for the receiving pointer-to-void.

Or, does the implicit conversion apply when the pointer value is extracted
and cast to void * in the receiving function?
        -leor 

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