# `type.match_pattern_type`

Pattern cannot match this value.

Area 3, [Logic](../topics/logic.md); not declinable; the next step is usually the agent's.

```jadpo
function describe(state: DeliveryState) -> Label {
    return match state {
        true -> "Yes"
        DeliveryState.pending -> "Pending"
        DeliveryState.sent -> "Sent"
        DeliveryState.failed -> "Failed"
    }
}
```

```text
error: A `Bool` can't match a `DeliveryState`
 --> main.jadpo:3:9
  |
3 |         true -> "Yes"
  |         ^^^^ wrong kind of pattern
  reason: A `DeliveryState` is matched by its variants, such as `DeliveryState.pending`.
  next: Write a pattern for a `DeliveryState` (agent)
  rule: type.match_pattern_type
  help: https://jadpo.dev/docs/errors/type.match_pattern_type

check failed: 1 error, 2 files
```