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error_def! OverflowError {
  Default { arg1: String, arg2: String }
    => "Arithmetic overflow." ("Arguments resulting in overflow  were {} and {}", arg1, arg2)
}

error_def! DivisionError {
  DivideByZeroError { arg1: String }
    => "Divide by zero error." ("Attempted to divide {} by zero.", arg1),
  OverflowError { arg1: String, arg2: String }
    => "Arithmetic overflow." ("Arguments resulting in overflow  were {} and {}", arg1, arg2)
}