| 1 | interface Stringy { |
| 2 | str() string |
| 3 | } |
| 4 | |
| 5 | struct SomeStruct {} |
| 6 | |
| 7 | fn stringify(value Stringy) string { |
| 8 | return value.str() |
| 9 | } |
| 10 | |
| 11 | fn join(values ...Stringy) string { |
| 12 | return values.map(it.str()).join(' ') |
| 13 | } |
| 14 | |
| 15 | fn collect(values []Stringy) string { |
| 16 | return values.map(it.str()).join(' ') |
| 17 | } |
| 18 | |
| 19 | fn test_interface_implicit_str_method() { |
| 20 | some_struct := SomeStruct{} |
| 21 | assert stringify('hi there') == 'hi there' |
| 22 | assert stringify(1337) == '1337' |
| 23 | assert stringify(true) == 'true' |
| 24 | assert stringify(some_struct) == 'SomeStruct{}' |
| 25 | assert join('hi', 42, false, some_struct) == 'hi 42 false SomeStruct{}' |
| 26 | } |
| 27 | |
| 28 | fn test_interface_implicit_str_method_for_pointer_arrays() { |
| 29 | values := [&SomeStruct{}] |
| 30 | assert collect(values) == 'SomeStruct{}' |
| 31 | } |
| 32 | |