class Parser::Builders::Default

def unary_op_map(op_t, arg_e=nil) 

def unary_op_map(op_t, arg_e=nil)
  if arg_e.nil?
    expr_l = loc(op_t)
  else
    expr_l = loc(op_t).join(arg_e.loc.expression)
  end
  Source::Map::Operator.new(loc(op_t), expr_l)
end