feat: add IterableWeakSet and IterableWeakMap classes#19
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June 12, 2026 01:11
This addresses issue bogeeee#8: withTrim no longer creates a new function instance on every call. Instead, it reuses the same wrapper for identical (callbackFn, useSignatureFrom) pairs, enabling use with addEventListener/removeEventListener patterns. - WeakMap cache per callbackFn with auto-GC - Inner Map tracks useSignatureFrom variants
Implements iterable weak collection types using WeakRef + FinalizationRegistry, enabling safe cleanup of connection-bound callbacks without memory leaks. These classes solve the issue where ClientCallbacks/ClientCallbacksForEntities need to be forgettable but also iterable - something the built-in WeakSet/WeakMap don't support and the not-so-weak package's implementation has correctness bugs. Implementation details: - Uses WeakRef to hold weak references to values/keys - Uses FinalizationRegistry to detect when entries are GC'd - Automatically compacts internal storage during iteration - Fully typed with proper TypeScript generics
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Implements
IterableWeakSet<T>andIterableWeakMap<K, V>using WeakRef + FinalizationRegistry. Closes #9.