Mixing keyword with regular arguments in Ruby?

Question

Ruby 2.0 supports keyword arguments. I was wondering, what are the \'rules\' for mixing regular with keyword arguments? Something like this would not work:

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Answer 1

1. Arguments with defaults and splat argument must be grouped together;
2. Splat argument must appear after positional arguments with default values but before keyword arguments;
3. Keyword arguments must appear after positional arguments and before double splat argument;

4. Double splat argument must appear last but before block argument.

   def foo(a, b=1, c=2, *d, e, f: 1, g: 2, **kwargs, &block)