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Date: -- (:)
From: Aleksey Nogin <nogin@m...>
Subject: Re: [Caml-list] understanding weak
On 31.10.2008 07:57, Martin Jambon wrote:

> let x = (1, 2);;
> let wa = Weak.create 10;;
> Weak.set wa 0 (Some x);;
> ...
> print_int (fst x);;
> 
> (fst x) would certainly cause funny effects if x were GC'ed at an
> arbitrary time after it has been added to the weak array.
> 
> An object can be reclaimed by the GC only if there is no reference to
> it. This remains true. Adding an object to a weak array just doesn't
> count as a reference.
> 
Martin,

You are answering the wrong question - you are answering "could x be
GCed too early?" - the answer is obviously "no". However, the initial
question was "could (Some x) be removed from wa too early by GC - before
x is orphaned?" The answer is "we'd hope not", but the documentation is
somewhat ambiguous.

Aleksey