Message-ID:	<3AE2C625.9C560766@earthlink.net>
From:	Martin Ambuhl <mambuhl AT earthlink DOT net>
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Subject:	Re: Printing function pointers
References:	<3AE082F7 DOT B4E9C05 AT jps DOT net> <3AE1D9D3 DOT AC592F3F AT mail DOT rosecom DOT ca>
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Date:	Sat, 21 Apr 2001 23:52:24 GMT
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To:	djgpp AT delorie DOT com
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April wrote:
> 
> I changed your example to include explicit type casts:


Please note that this whole thread pertains to something that
has no meaning in standard C++.  Had you attempted to cast with 
the modern static_cast<> mechanism, you would have gotten a 
diagnostic from gcc.  This would be true even if the cast were to
`void *', since the standard does not guarantee that function
pointers can be converted to object pointers.  If you are willing
to use reinterpret_cast<>, gcc will let you, but this particular
construct is almost always a sign that you are going where you ought
not to go.


> 
> #include <iostream>
> 
> int junk1() { return 111; }
> 
> int junk2() { return 222; }
> 
> int main()
> {
>   if ( junk1 != junk2 ) {
>     cout << "different\n";
>   }
>   cout << ( unsigned long )junk1 << '\n';
>   cout << ( unsigned long )junk2 << '\n';
>   return 0;
> }
> 
> and I got:
> 
> different
> 5488
> 5508
> 
> I don't know enough about the C++ standard to explain why though

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