[DGD] Switch-Case Variable Scope

[Raymond Jennings]

Plus you can always do this:

switch(foo)
{
case foo:
    { /* Create a block inside a case label, like this */
        blah blah blah;
    }
}

I do this quite often myself.

On Thu, Apr 18, 2013 at 9:51 AM, Felix A. Croes <felix at dworkin.nl> wrote:

> Blain <blain20 at gmail.com> wrote:
>
> > Well, because this is the first time I've seen a block placed there!  In
> > all my years...  I wonder if I missed this in other drivers too.  Yup,
> > LPMUD/Amylaar allows it.  MudOS allows it without braces, which is where
> I
> > was spoiled from.  Even in LPMUD and LDMUD docs I'd never seen an example
> > of using a block specifically with a case label.  Thanks!
>
> DGD's dialect of LPC follows C89, which does not allow mixing of
> declarations and code.  This goes against recent programming language
> trends, but in my opinion, separate declarations make for clearer code.
>
> C99 and C++ allow mixing declarations and code.  The scope of each
> declaration is until the end of the statement block (including a switch
> statement block).
>
> Your example:
>
> > switch(typeof(arg))
> > {
> > case T_ARRAY:
> >   mixed *ret;
> >
> >   <code>
> >   break;
> > cade T_MAPPING:
> >   mapping ret;
> >
> >   <code>
> >   break;
> > }
>
> has a variable declared twice in the same statement block.  I'm surprised
> that MudOS allows this; separate scoping for case-labelled code is
> definitely not part of the general trend.  Certainly, this is a good
> example of the sort of confusion that I want to prevent.
>
> Regards,
> Felix Croes
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