andrewcoppin: > Here's an interesting question... Is it possible to attach finalisers to > a value? (That is, have some Haskell code executed when the item in > question is reclaimed by the GC.) I'm interested in knowing whether a > particular data structure is shared (i.e., whether it's safe to mutate > it or whether it must be copied first), and a simple reference-counting > scheme looks like the easiest option.
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