Re: Is this possible? (garbage collect and weak tables)

["Alex Davies" <alex.mania@...>]

Ignacio Burgueño wrote:
> Would this be safe?
> local user = inconcert.authUser or {languageId=14346, codepage="UTF-8"}
>
> local temp = translators[key] or {} -- get a strong reference to the
> -- elements in the weak table
> > > > > translators[key] = temp
> local translator = temp[user.languageId]
> if not translator then
> translator = i18nlib.Translator{(arguments omitted)}
> temp[user.languageId] = translator
> end
> return translator

That'd be safe, but I think you accidentally commented out a required line? 
(Indicated).

You could even just add this one line:

mt.__index = function(tab, key)
   local user = inconcert.authUser or {languageId=14346, codepage="UTF-8"}
   translators[key] = translators[key] or {}
-->    local temp = translators[key]  -- keep a strong reference to the 
table for this call
   local translator = translators[key][user.languageId]
   if not translator then
       translator = i18nlib.Translator{(arguments omitted)}
       translators[key][user.languageId] = translator
   end
   return translator
end

I wonder if LuaJit 2.x would incorrectly optimise the temp variable away =/? 
I'm guessing not, as the gc only runs in interpreted mode, but still 
interesting.

- Alex