from omegaconf import DictConfig

cfg = DictConfig({"x": "${does_not_exist}"})
node = cfg._get_node("x")
node._dereference_node(throw_on_missing=False, throw_on_resolution_failure=False)


cases = dict(
    case1=DictConfig({"x": "???"}),
    case2=DictConfig({"x": "${missing}", "missing": "???"}),
    case3=DictConfig({"x": "${does_not_exist}"}),
)

for throw_on_resolution_failure in [True, False]:
    print(f"{throw_on_resolution_failure=}")
    for throw_on_missing in [True, False]:
        print(f"    {throw_on_missing=}")
        for case_name, case in cases.items():
            try:
                node = case._get_node("x")
                result = repr(
                    node._dereference_node(
                        throw_on_missing=throw_on_missing,
                        throw_on_resolution_failure=throw_on_resolution_failure,
                    )
                )
            except Exception as excinfo:
                result = type(excinfo).__name__
            print(f"        {case_name}: {result}")