[U-Boot] [PATCH] Introduce a global bool type

[Wolfgang Denk]

Dear Timur Tabi,

In message <50EC5D29.1070408 at freescale.com> you wrote:
>
> > _Bool has been introduced very late to any C standard, and you can
> > still see this from the ugly, unnatural name.
> 
> It was introduced in C99, which is over 12 years old.

And how old is C?   I think the "official" announcment was 1972, so
that's more than twice as long without that addition.

> > work wit than a CLI.  And I've seen more than one case where bugs were
> > caused by using "proper bool types" like this:
> > 
> > 	i = 0;
> > 	j = 0;
> > 	k = 2;
> > 
> > 	if ((i | j | k) == true) ...
> 
> Ok, but this is just wrong.  i, j, and k are not boolean types, so they
> should not be compared with 'true' or 'false'.  I don't think you'll find
> any disagreement with that.

You are right.  And I wrote that it's a bug.  But this is what you can
easily get from using boolean types.  This is example has not been
invented by me.  I don't even claim that this was good programming
style - all I want to say is that from what I have seen the boolean
types are not a panacea; they cause new problems as well.

Best regards,

Wolfgang Denk

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