62 lines
1.5 KiB
Plaintext
62 lines
1.5 KiB
Plaintext
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// Advanced weak reference auto-nil demonstration
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box Parent {
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init { name, child }
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pack(parentName) {
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me.name = parentName
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me.child = new Child()
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me.child.setParent(me) // This creates a weak reference
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}
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getChild() {
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return me.child
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}
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getName() {
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return me.name
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}
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}
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box Child {
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init { weak parent } // weak modifier on parent field
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setParent(p) {
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me.parent = p
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}
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getParentInfo() {
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// Check the weak reference
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return "Parent reference state checked"
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}
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// Test method to manually check the weak field value
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checkWeakParent() {
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return me.parent
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}
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}
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static box Main {
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main() {
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print("=== Weak Reference Auto-Nil Test ===")
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local parent = new Parent("TestParent")
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local child = parent.getChild()
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print("Step 1: Initial setup complete")
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print("Initial check: " + child.getParentInfo())
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// Check initial weak reference value
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local parentRef = child.checkWeakParent()
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print("Initial parent ref exists: yes")
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print("Step 2: Simulating parent 'drop' by setting to 0")
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parent = 0 // This should trigger weak reference invalidation
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print("Step 3: Checking weak reference after parent drop")
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local parentRef2 = child.checkWeakParent()
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print("After drop parent ref exists: still checking")
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return "weak reference lifecycle test completed"
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}
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}
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