| 1 | fn byte_str(num u32) !string { |
| 2 | return if num > 0xff { error('larger than byte') } else { num.str() } |
| 3 | } |
| 4 | |
| 5 | fn short_str(num int) !string { |
| 6 | return if num > 0xffff { error('larger than short') } else { num.str() } |
| 7 | } |
| 8 | |
| 9 | fn test_main() { |
| 10 | num := u32(0xfffff) |
| 11 | mut str := '' |
| 12 | if bs := byte_str(num) { |
| 13 | str = 'byte: ${bs}' |
| 14 | } else if ss := short_str(int(num)) { |
| 15 | str = 'short: ${ss}' |
| 16 | } else { |
| 17 | str = 'err: ${err}' |
| 18 | } |
| 19 | |
| 20 | assert str.contains('err:') |
| 21 | } |
| 22 |