# File lib/parser/macruby.rb, line 4659
def _reduce_310(val, _values, result)
                      *when_bodies, (else_t, else_body) = *val[2]

                      result = @builder.case(val[0], nil,
                                             when_bodies, else_t, else_body,
                                             val[3])
                    
    result
end