- xbt_assert(not surf_cpu_model_pm, "CPU model already initialized. This should not happen.");
- xbt_assert(not surf_cpu_model_vm, "CPU model already initialized. This should not happen.");
+ xbt_assert(surf_cpu_model_pm == nullptr, "CPU model already initialized. This should not happen.");
+ xbt_assert(surf_cpu_model_vm == nullptr, "CPU model already initialized. This should not happen.");