60 lines
1.5 KiB
Plaintext
60 lines
1.5 KiB
Plaintext
// Working demonstration of weak reference auto-nil behavior
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box Parent {
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init { name }
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pack(parentName) {
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me.name = parentName
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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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// This method will use the weak field access system
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// which automatically returns null if the parent is dropped
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if me.parent == 0 {
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return "Parent is null (dropped)"
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} else {
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return "Parent exists"
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}
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}
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// Direct weak field access for testing
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accessWeakParent() {
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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 Demonstration ===")
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local parent = new Parent("TestParent")
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local child = new Child()
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print("Step 1: Setting up parent-child relationship")
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child.setParent(parent)
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print("After setup: " + child.getParentInfo())
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print("Step 2: Simulating parent 'drop' (set to 0)")
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parent = 0 // This should trigger weak reference invalidation
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print("Step 3: Checking child's parent reference after drop")
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print("After drop: " + child.getParentInfo())
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print("Step 4: Direct weak field access test")
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local directAccess = child.accessWeakParent()
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return "Auto-nil demonstration completed successfully"
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}
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} |