54 lines
1.3 KiB
Plaintext
54 lines
1.3 KiB
Plaintext
|
// Complete weak reference auto-nil test
|
||
|
|
|
||
|
|
box Parent {
|
||
|
|
init { name, child }
|
||
|
|
|
||
|
|
pack(parentName) {
|
||
|
|
me.name = parentName
|
||
|
|
me.child = new Child()
|
||
|
|
me.child.setParent(me) // This should create a weak reference
|
||
|
|
}
|
||
|
|
|
||
|
|
getChild() {
|
||
|
|
return me.child
|
||
|
|
}
|
||
|
|
|
||
|
|
getName() {
|
||
|
|
return me.name
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
box Child {
|
||
|
|
init { weak parent } // weak modifier on parent field
|
||
|
|
|
||
|
|
setParent(p) {
|
||
|
|
me.parent = p
|
||
|
|
}
|
||
|
|
|
||
|
|
getParentInfo() {
|
||
|
|
// Instead of comparing to null, check if parent field exists and is valid
|
||
|
|
local parentExists = me.parent != 0 // Using 0 as a null check workaround
|
||
|
|
if parentExists {
|
||
|
|
return "Parent exists"
|
||
|
|
} else {
|
||
|
|
return "Parent is null (dropped)"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static box Main {
|
||
|
|
main() {
|
||
|
|
local p = new Parent("TestParent")
|
||
|
|
local child = p.getChild()
|
||
|
|
|
||
|
|
print("Initial: " + child.getParentInfo())
|
||
|
|
|
||
|
|
// Test the weak reference system
|
||
|
|
// When p goes out of scope, child.parent should automatically become null
|
||
|
|
p = 0 // Setting to 0 to simulate parent dropping
|
||
|
|
|
||
|
|
print("After drop: " + child.getParentInfo())
|
||
|
|
|
||
|
|
return "weak reference auto-nil test completed"
|
||
|
|
}
|
||
|
|
}
|