| 1 | @[inline] |
| 2 | fn char(ch u8) fn (string) !(u8, string) { |
| 3 | return fn [ch] (input string) !(u8, string) { |
| 4 | return if input[0] == ch { |
| 5 | ch, input[1..] |
| 6 | } else { |
| 7 | error('Some error') |
| 8 | } |
| 9 | } |
| 10 | } |
| 11 | |
| 12 | fn main() { |
| 13 | a_char := int('a'[0]) |
| 14 | inputs := ['a', 'abc'] |
| 15 | remains := ['', 'bc'] |
| 16 | |
| 17 | for i, input in inputs { |
| 18 | got, remain := a_char(input)! |
| 19 | |
| 20 | assert got == 'a'[0] |
| 21 | assert remain == remains[i] |
| 22 | } |
| 23 | } |
| 24 |