Re: game developers?

[Steve Dekorte <steve@...>]

David Jeske <jeske@chat.net> wrote:
> Solutions that seem useful to me would be:
>  - allowing "0" to be considered false 
>  - creating a "real false" value, which looks like nil, but takes
>    up space.

How about a tagmethod for boolean:

----------
None = {}

noneTag = newtag()
settagmethod( noneTag, "boolean", function () return nil end)
settag(None, noneTag)
----------

Now when we have:

if aTable.a then
  ...
end

If "a" is None or nil, then the "if" evaluates a false
otherwise it evaluates to true. "None" could then be used
as the false boolean (unlike nil) can hold a place in a table.

Steve