Re: [boost] How To Declare Enumerators (was: IOStreams formal review start)

From: Rob Stewart (stewart_at_[hidden])
Date: 2004-09-10 19:04:12

From: "Jonathan Turkanis" <technews_at_[hidden]>
> "Rob Stewart" <stewart_at_[hidden]> wrote in message:
> > From: "Jonathan Turkanis" <technews_at_[hidden]>
> 
> > > I stole this idiom from John Maddock: http://tinyurl.com/4no5s. It's
> supposed to
> > > make insertion in the middle easier. I think it's the vector vs. list
> tradeoff.
> >
> > It fails to make insertion in the middle easy, at least
> > comparatively.  Start with:
> >
> >    Yours/John's            Mine
> > enum
> > {
> >    name_a = 1,             1<<0,
> >    name_b = name_a << 1,   1<<1,
> >    name_c = name_b << 1    1<<2
> > };
> >
> > Now add name_x after name_b:
> >
> > enum
> > {
> >    name_a = 1,             1<<0,
> >    name_b = name_a << 1,   1<<1,
> >    name_x = name_b << 1,   1<<2,
> >    name_c = name_x << 1    1<<3
> > };
> >
> > Your version requires a more extensive change
> 
> True -- if there are only three enumerators!

How does the number of enumerators matter?

-- 
Rob Stewart                           stewart_at_[hidden]
Software Engineer                     http://www.sig.com
Susquehanna International Group, LLP  using std::disclaimer;