Header <memory_resource> implementation status Reference Implementation : Cannot implement with language itself. Need compiler support. Used C++ N STL : Partially implemented with C++ N : Fully implemented with C++ N : Not yet implemented Features Standard Implemented in Classes polymorphic_allocator memory_resource pool_options synchronized_pool_resource unsynchronized_pool_resource monotonic_buffer_resource Functions new_delete_resource null_memory_resource get_default_resource set_default_resource