Re: [9fans] cc nit?

[Comeau At9Fans <comeauat9fans@gmail.com>]

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On Sun, Jul 1, 2012 at 6:32 PM, Charles Forsyth
<charles.forsyth@gmail.com>wrote:

> Yes, I was assuming the same approach as for the existing void data
> declaration, that the structure is given a nominal size,
> for just the reasons you give.  (That's what gcc seems to do.)
>
> On 1 July 2012 23:22, Comeau At9Fans <comeauat9fans@gmail.com> wrote:
>
>> Many compilers do just that, however, that said, unless the compiler is
>> prepared for it, since it effectively yields a struct of zero size which
>> normally is a no-go, it could produce bugs involving sizeof, initializers,
>> pointer addition et al, even some divisions by zero if the compiler is
>> making certain assumptions already, unless it already can have zero length
>> objects of this nature for some other reasons.
>
>
Actually gcc gives it (the empty struct) sizeof zero (same as for its zero
length arrays).  Comeau mimics that behavior in gcc-mode, but used to/still
can also generate a dummy internal member too (usually a char bringing
forth sizeof 1).

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