RE: When does __index metamethod get called?

["Jerome Vuarand" <jerome.vuarand@...>]

__newindex is used for any write to he table.

__index is a getter, __newindex is the setter.

 

Doub.

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De : lua-bounces@bazar2.conectiva.com.br [mailto:lua-bounces@bazar2.conectiva.com.br] De la part de Chris
Envoyé : 16 mars 2006 18:20
À : Lua list
Objet : When does __index metamethod get called?

Example:

   tbl = {} 
   
setmetatable(tbl, {__index = function(t,k) print("test") end})
   
tbl[1] = 1
   tbl[2] = 2

Prints nothing... ??  

Also, is there any metamethod that you can hook to know when a value is 
being set?  I know there is __newindex but that only appears to be called 
for new values being inserted into the table.  I want to hook both cases of 
new values and also setting existing values.

-- 
// 
Chris