OpenEuphoria

Re: Forward Definitions

• Posted by "Cuny, David" <David.Cuny at DSS.CA.GOV> Feb 23, 1999
• 661 views

Rod Jackson wrote:

> David continues...
>
>> I'd much rather change the behavior to:
>>
>> 1. Disallow routines in the same scope to be redefined.
>> 2. Have built-ins return valid routine id's.
>
> Interesting. I assume you're advocating the ability to redefine
> ANY routine?

I'm not really in favor of it, but Gabriel (and others) have found it
useful. If it continues as a feature, it should at least be consistant.

> As far as I can tell, routine_id DOES look up and return
> IDs at run-time...

You misunderstand my complaint here. While the code executes at run time,
the scope of routines that it sees is limited to that which it could see at
complile time. For example:

        procedure foo()
                ? routine_id("bar")
        end procedure

        procedure bar()
        end procedure

        foo()

will produce:

        -1

even though 'bar' is defined before the point which foo is called. That's
because the scope of the routines that foo can see is defined by where it
was coded (before bar) and not where is run (after bar).

> And I was fairly surprised when I first found out 0 was a valid
> routine ID. I don't see it as being much of a bother, except that
> it doesn't seem to fit neatly ...

Exactly. All other routines in Euphoria return 0 for false; it seems strange
that this one doesn't as well.

-- David Cuny