[Cobolforgcc-devel] Re: %union

[Keisuke N. <kx...@po...>]

At Wed, 06 Jun 2001 06:11:58 +1000,
Tim Josling wrote:
> 
> The approach I took is to define seperate structures and do
> casts. At first, I used to cast on every access, which became
> tedious very quickly (you still see a fair bit of this code lying
> around). So now I cast into a variable which is of the right type
> and use that variable. This would not cause any runtime slowdown
> as the cast is opimized away. This also gives me a good
> opportunity to put in an assert or a type check to improve the
> integrity of the program. This is the closest to type safeness I
> have been able to get.

Okay, I think I understand you, though I now prefer accessor macros
because of their simplicity, forgetting about type safeness.

> I don't like accessor macros really because you have to keep
> looking up what actual fields they are accessing.

Could you explain what you mean here?

Thanks,
Keisuke Nishida