>
> The Ephemeron gc technique
> contributes nothing to the ability to reclaim space for such code
> because of the relative lifetimes of the map and its keys.
>
Yes - my line-of-thought as well. If I may riff on your code a bit (ymmv):
class Purse {
// Move private field declaration out here for more scopy-ness
private balance;
// Allow private without arg as shorthand for "private(this)"
constructor(balance = 0) { private.balance = balance; }
// Everything else the same
getBalance() { return balance; }
makePurse() { return new Purse; }
deposit(amount, srcPurse) {
private(srcPurse).balance -= amount;
balance += amount;
}
}
The expansion is exactly the same, except that the private record is sealed
before the constructor body starts executing. Reconceptualizing private
instance state in terms of a separate object stored in a weakmap -
interesting!
{ Kevin }
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