error: C++ does not allow pointer to reference as a type
 --> $DIR/ptr_unsupported.rs:6:38
  |
6 |         fn get_ptr_to_reference() -> *mut &C;
  |                                      ^^^^^^^

error: unsupported unique_ptr target type
 --> $DIR/ptr_unsupported.rs:7:38
  |
7 |         fn get_uniqueptr_to_ptr() -> UniquePtr<*mut C>;
  |                                      ^^^^^^^^^^^^^^^^^

error: unsupported vector element type
 --> $DIR/ptr_unsupported.rs:8:45
  |
8 |         fn get_vector_of_ptr() -> UniquePtr<CxxVector<*mut C>>;
  |                                             ^^^^^^^^^^^^^^^^^^