Sorry, my last mail may be wrong !

The semantics of weak pointer are just some kind of cache where value
can be erased at any time by the GC.

The kind of weak array you need is array where value are erased by the
GC if and only if the value is not pointed from outside the weak array.
That is the mark phase of the GC does not traverse weak array.



-- 
Christophe Raffalli
Université de Savoie
Batiment Le Chablais, bureau 21
73376 Le Bourget-du-Lac Cedex

tél: (33) 4 79 75 81 03
fax: (33) 4 79 75 87 42
mail: Christophe.Raffalli@univ-savoie.fr
www: http://www.lama.univ-savoie.fr/~RAFFALLI
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