Re: Use enum to declare errno values

From: moreau francis
Date: Wed Nov 23 2005 - 10:44:02 EST

--- Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> a écrit :

> On Mer, 2005-11-23 at 16:31 +0200, Denis Vlasenko wrote:
> > Enums are really nice substitute for integer constants instead of #defines.
> > Enums obey scope rules, #defines do not.
> >
> > However enums are not widely used because of
> > 1. tradition and style
> > 2. awkward syntax required: enum { ABC = 123 };
> The SATA layer uses enum for constants and while it was a bit of change
> in style when I met it, it does seem to work just as well

I guess we won't use enumeration because it needs to many changes...Each
function that returns a errno value should have their prototype changed like

int foo(void)
int retval;
return retval;

should be changed into

enum errnoval foo(void)
enum errnoval retval;
return retval;


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