Datasets:
| match x: | |
| case 2: ... | |
| case var: ... | |
| match x: | |
| case 2: ... | |
| case _: ... | |
| match x: | |
| case var if True: ... # don't try to refute a guarded pattern | |
| case 2: ... | |
| match x: | |
| case 2: ... | |
| case var: ... | |
| match x: | |
| case 2: ... | |
| case _: ... | |
| match x: | |
| case var if True: ... # don't try to refute a guarded pattern | |
| case 2: ... | |