Re: Little help with Getters, Setters and Native integration

[David Given <dg@...>]

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jdarling@eonclash.com wrote:
[...]
> If I have: GetWidth and SetWidth is their a way to have a table entry of
> Width that calls GetWidth and SetWidth automatically?  I know I have to
> play with __index, but I can't seem to wrap my brain around it.

__index is called when reading from a non-existent table entry,
__newindex when writing to one. So you can use a metatable of:

{
  __index = function(t, k)
    if (k == "width") then
      return GetWidth()
    end
  end,

  __newindex = function(t, k, v)
    if (k == "width") then
      SetWidth(v)
    end
  end
}

You have to make sure never to set t.width, though, or these will never
get called.

- --
+- David Given --McQ-+
|  dg@cowlark.com    | "Those that repeat truisms, are also forced to
| (dg@tao-group.com) | repeat them." --- Anonymous from Slashdot
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