I'm good with number 2.
Although, I don't have a compelling need to use a digit as the first
character of a class, so any of the options would be fine with me.
3DGlasses is a pretty good name. ;-)
--
Mark Miesfeld
On Sun, Nov 24, 2013 at 8:06 AM, Rick McGuire <[email protected]> wrote:
> Ran into this little glitch this morning with a program I was writing. I
> created a class that started with the characters "3D", and was getting an
> error when i tried to instantiate it because the corresponding environment
> symbol resolved to a string value. I opened bug 1212 to address this.
>
> One of the first things I encountered was the docs for environment
> symbols, which requires that the first character not be a digit (section
> 1.13.6 in the reference). So, in a sense, this is working correctly,
> although with a high astonishment factor. The ::class directive does not
> place any restrictions, allowing you to create classes that you can't look
> up via environment symbols. For example,
>
> say .context~package~classes["INVALID NAME"]~new
> say .3dglasses~new
>
> ::class 3DGlasses
> ::method init
> say "Creating 3D Glasses"
>
> ::class "invalid name"
> ::method init
>
> say "Creating a funny instance"
>
> It seems like a reasonable thing to create a class name like 3DGlasses,
> but the current definition of environment symbols pretty much precludes
> this. I see a number of possibilities here;
>
> 1) Do nothing other than add some documentation to the ::CLASS directive
> explaining the implications of the name choice.
>
> 2) Change the definition of environment symbol to a restriction on the
> second character to "the remaining part of the symbol cannot be a valid
> Rexx number'.
>
> 3) Implement restrictions on the ::CLASS directive such that the name
> must be a valid environment symbol.
>
> I'm not terribly fond of solution 3), I'm sort of in favor of 2, but can
> live with 1.
>
> Thoughts?
>
> Rick
>
>
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