Function Assign

test-app/runtime/src/main/cpp/include/cppgc/persistent.h:236–252

  }

  void Assign(T* ptr) {
    if (IsValid()) {
      if (ptr && ptr != kSentinelPointer) {
        // Simply assign the pointer reusing the existing node.
        SetValue(ptr);
        this->CheckPointer(ptr);
        return;
      }
      WeaknessPolicy::GetPersistentRegion(GetValue()).FreeNode(GetNode());
      SetNode(nullptr);
    }
    SetValue(ptr);
    if (!IsValid()) return;
    SetNode(WeaknessPolicy::GetPersistentRegion(GetValue())
                .AllocateNode(this, &BasicPersistent::Trace));
    this->CheckPointer(Get());
  }

  void ClearFromGC() const {
    if (IsValid()) {