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Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?)
From: |
Pascal J . Bourguignon |
Subject: |
Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?) |
Date: |
Tue, 3 Feb 2004 06:09:35 +0100 |
Helge Hess writes:
> On 02.02.2004, at 20:47, Nicola Pero wrote:
> >> I would again like to point out that if the intention was to limit
> >> BOOL
> >> to YES and NO, it would have been defined as
> >> typedef enum { YES, NO } BOOL;
> >
> > Wouldn't this have been a waste a space just to just store a YES/NO ?
>
> Well, isn't that you who is suggesting that a "true boolean" is worth
> major restrictions? ;-)
>
> Your point is pretty mood because:
> a) BOOL is *NOT* specified to be char and indeed is not mapped to char
> on
> some platforms
> b) even char is as wasteful requiring 8 times the memory necessary
> (which is why everyone is using bitfields anyway) - apparently it is
> worth that
>
> Is int more wasteful than that:
> @interface MyFunkyObject
> {
> BOOL a;
> BOOL b;
> }
> I guess not, because a and b are probably aligned to 32 bits
> boundaries. Is
> - (void)doIt:(BOOL)_a
> more wasteful than int? I also guess not, because the register _a is
> being passed in is available in any case and probably not going to be
> shared by multiple char variables.
>
> In short: the practical gain of using char for BOOL is minimal,
> especially in comparison to the already wasteful use of char instead of
> a bit.
>
> Greets,
> Helge
>
> PS: this discussion is a lot of fun - and I indeed learned a lot I
> didn't knew before ;-)
> --
> http://docs.opengroupware.org/Members/helge/
> OpenGroupware.org
>
>
>
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--
__Pascal_Bourguignon__ http://www.informatimago.com/
There is no worse tyranny than to force a man to pay for what he doesn't
want merely because you think it would be good for him.--Robert Heinlein
http://www.theadvocates.org/
- Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?), Richard Frith-Macdonald, 2004/02/01
- Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?), David Ayers, 2004/02/02
- Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?), Richard Frith-Macdonald, 2004/02/02
- Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?), Richard Frith-Macdonald, 2004/02/02
- Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?), Helge Hess, 2004/02/02
- Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?), Nicola Pero, 2004/02/02
- Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?), Pascal J . Bourguignon, 2004/02/02
- Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?), Helge Hess, 2004/02/02
- Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?),
Pascal J . Bourguignon <=
- Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?), Pascal J . Bourguignon, 2004/02/03
- Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?), Richard Frith-Macdonald, 2004/02/02
- Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?), Helge Hess, 2004/02/02
- Re: [RFA]: BOOL coding standards (Was: Problem with +numberWithBool: ?), Pascal J . Bourguignon, 2004/02/02