On Friday 02 December 2005 14:56, Coywolf Qi Hunt wrote:
> 2005/12/2, Pekka Enberg <[email protected]>:
> > Hi,
> >
> > 2005/12/2, Denis Vlasenko <[email protected]>:
> > > > There is another reason why enums are better than #defines:
> >
> > On 12/2/05, Coywolf Qi Hunt <[email protected]> wrote:
> > > This is a reason why enums are worse than #defines.
> > >
> > > Unlike in other languages, C enum is not much useful in practices.
> > > Maybe the designer wanted C to be as fancy as other languages? C
> > > shouldn't have had enum imho. Anyway we don't have any strong motives
> > > to switch to enums.
> >
> > I don't follow your reasoning. The naming collision is a real problem
> > with macros. With enum and const, the compiler can do proper checking
> > with meaningful error messages. Please explain why you think #define
> > is better for Denis' example?
> >
> > Pekka
>
> That is a bad bad style. It should be `#define FOO 123' if you have to
> write it.
I suspect this style was invented exactly as a device to stop confusing
macro names with variable/function names.
> It's also hard to see what the confusing bar is "if you are looking at
> file.c alone".
int f(int foo, int bar) {...}
bar is a parameter of type "int" of function f(). What else it could be here?
It's basic C.
> enum is worse than typdef. Don't you see why we should use `struct
> task_struct', rather than `task_t'?
>
> Introducing enum alone can't solve the problems from bad macro usage
> habits. Actually, it's not anything wrong with macros, it's
> programers' bad coding style.
>
> Macros play an important role in C, but enums don't.
Looks more like your personal dislike to enum keyword.
--
vda
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