# File lib/parser/ruby20.rb, line 5856
def _reduce_470(val, _values, result)
                      num = @builder.float(val[1])
                      if @builder.respond_to? :negate
                        # AST builder interface compatibility
                        result = @builder.negate(val[0], num)
                      else
                        result = @builder.unary_num(val[0], num)
                      end
                    
    result
end