Re: read only variables

[Julien Hamaide <julien.hamaide@...>]

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You can achieve this type of behavior by defining __newindex function in
the meta table of global environment.

In this function, you can achieve filtering such as

readonly_vars ={}
readonly_vars.myvar = true;

function metatable.__newindex(table, key, value)

if readonly_vars[ key ] != true  then
   rawset( table, key, value )
else
   error( "Read only vars can't be written" )
end


if you try to do this :

myvar = "test";

it will fail.

Julien


Christopher Lux wrote:
> Hi,
> i looking for a way to to achieve read only variables at least for my
> own defined global variables. I found a way for lua 4.0 with
> lua_settagmethod but this way does not work anymore with lua 5.x. So is
> there a way to get this kind of functionality?
> 
> -chris
> --Christopher Lux |
>                 | Bauhaus University Weimar
>                 | Faculty of Media - Virtual Reality Systems Group
> 
> 


- --
- --
Julien Hamaide
Engineering Coach
10Tacle Studios Belgium / Elsewhere Entertainment
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