Enum ServiceError 

#[non_exhaustive]
pub enum ServiceError {
    Exception(ExceptionCode),
    InvalidRequest(&'static str),
    Internal(&'static str),
}

Errors returned by a ModbusService handler.

The server maps these to Modbus exception responses on the wire.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Exception(ExceptionCode)

A standard Modbus exception (e.g. illegal address, illegal function).

InvalidRequest(&'static str)

The request was malformed or contained invalid parameters.

Internal(&'static str)

An internal error (maps to Server Device Failure exception on the wire).

Trait Implementations

impl Debug for ServiceError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ServiceError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for ServiceError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.