# File lib/brakeman/processors/alias_processor.rb, line 1207
  def process_or_simple_operation exp
    arg = exp.first_arg
    return nil unless string? arg or number? arg

    target = exp.target
    lhs = process_or_target(target.lhs, exp.dup)
    rhs = process_or_target(target.rhs, exp.dup)

    if lhs and rhs
      if same_value? lhs, rhs
        lhs
      else
        exp.target.lhs = lhs
        exp.target.rhs = rhs
        exp.target
      end
    else
      nil
    end
  end