// Phase 285W-Syntax-0: WeakRef basic test with weak x syntax
// SSOT: docs/reference/language/lifecycle.md:179 - weak <expr>/weak_to_strong()
//
// Test: weak x creates WeakRef, weak_to_strong() returns Box when alive
// Note: Full drop semantics test deferred (needs GC/scope analysis).
// Note: Field/value comparisons are intentionally not tested here, since LLVM harness may
// represent boxed integers as handles and (handle vs literal) comparisons can diverge.
// This fixture only verifies "upgrade succeeds while the strong ref is alive".

box SomeBox {
    x
}

static box Main {
    main() {
        local x = new SomeBox()
        local w = weak x

        // Test 1: weak_to_strong should succeed while x is alive
        local y = w.weak_to_strong()
        if y == null {
            print("ng: weak_to_strong returned null while x alive")
            return 1
        }

        print("ok: weak and weak_to_strong work correctly")
        return 2
    }
}