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# NWProtocolQUIC.ApplicationError

A QUIC application error code.

```
struct ApplicationError
```

## Topics

### Configuring Application Errors

[`init(code: UInt64, reason: String?)`](/documentation/Network/NWProtocolQUIC/ApplicationError/init(code:reason:))

Initializes a QUIC application error with an error code and an optional reason.

### Inspecting Application Errors

[`let code: UInt64`](/documentation/Network/NWProtocolQUIC/ApplicationError/code)

The QUIC application error code.

[`let reason: String?`](/documentation/Network/NWProtocolQUIC/ApplicationError/reason)

The QUIC application error reason.

## Relationships

### Conforms To

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Sendable`](/documentation/Swift/Sendable)

[`ExpressibleByIntegerLiteral`](/documentation/Swift/ExpressibleByIntegerLiteral)

---

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