operator + method
Implementation
SqlMoney operator +(Object other) {
if (other is SqlMoney) {
return SqlMoney(value + other.value);
} else if (other is num) {
return SqlMoney(value + other);
} else if (other is String) {
return SqlMoney(value + double.parse(other.toString()));
}
throw ArgumentError(other.toString() + 'is not a number');
}