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LibJS: Add spec comments to FinalizationRegistryPrototype

This commit is contained in:
Linus Groh 2023-01-27 21:59:17 +00:00
parent 2473940526
commit 6d6ea1fffe
2 changed files with 37 additions and 5 deletions

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@ -23,15 +23,25 @@ void FinalizationRegistry::add_finalization_record(Cell& target, Value held_valu
m_records.append({ &target, held_value, unregister_token });
}
// Extracted from FinalizationRegistry.prototype.unregister ( unregisterToken )
bool FinalizationRegistry::remove_by_token(Cell& unregister_token)
{
// 4. Let removed be false.
auto removed = false;
// 5. For each Record { [[WeakRefTarget]], [[HeldValue]], [[UnregisterToken]] } cell of finalizationRegistry.[[Cells]], do
for (auto it = m_records.begin(); it != m_records.end(); ++it) {
// a. If cell.[[UnregisterToken]] is not empty and SameValue(cell.[[UnregisterToken]], unregisterToken) is true, then
if (it->unregister_token == &unregister_token) {
// i. Remove cell from finalizationRegistry.[[Cells]].
it.remove(m_records);
// ii. Set removed to true.
removed = true;
}
}
// 6. Return removed.
return removed;
}