Function _ParseFn

fire/core.py:718–752

Parses the list of `args` into (varargs, kwargs), remaining_args.

(args)

  required_kwonly = set(fn_spec.kwonlyargs) - set(fn_spec.kwonlydefaults)

  def _ParseFn(args):
    """Parses the list of `args` into (varargs, kwargs), remaining_args."""
    kwargs, remaining_kwargs, remaining_args = _ParseKeywordArgs(args, fn_spec)

    # Note: _ParseArgs modifies kwargs.
    parsed_args, kwargs, remaining_args, capacity = _ParseArgs(
        fn_spec.args, fn_spec.defaults, num_required_args, kwargs,
        remaining_args, metadata)

    if fn_spec.varargs or fn_spec.varkw:
      # If we're allowed *varargs or **kwargs, there's always capacity.
      capacity = True

    extra_kw = set(kwargs) - set(fn_spec.kwonlyargs)
    if fn_spec.varkw is None and extra_kw:
      raise FireError('Unexpected kwargs present:', extra_kw)

    missing_kwonly = set(required_kwonly) - set(kwargs)
    if missing_kwonly:
      raise FireError('Missing required flags:', missing_kwonly)

    # If we accept *varargs, then use all remaining arguments for *varargs.
    if fn_spec.varargs is not None:
      varargs, remaining_args = remaining_args, []
    else:
      varargs = []

    for index, value in enumerate(varargs):
      varargs[index] = _ParseValue(value, None, None, metadata)

    varargs = parsed_args + varargs
    remaining_args += remaining_kwargs

    consumed_args = args[:len(args) - len(remaining_args)]
    return (varargs, kwargs), consumed_args, remaining_args, capacity

  return _ParseFn