Enum paho_mqtt::errors::Error

pub enum Error {
    Paho(i32),
    PahoDescr(i32, String),
    Publish(i32, Message),
    ReasonCode(ReasonCode),
    BadTopicFilter,
    Io(Error),
    Utf8(Utf8Error),
    Nul(NulError),
    Conversion,
    Timeout,
    General(&'static str),
    GeneralString(String),
}

The errors from an MQTT operation.

Variants

Paho(i32)

An error from the underlying Paho C library. These are brought out as individual constants, below.

PahoDescr(i32, String)

An error from the Paho C library with an additional description.

Publish(i32, Message)

A synchronous error when publishing creating or queuing the message.

ReasonCode(ReasonCode)

An MQTT v5 error from a reason code.

BadTopicFilter

A bad topic filter

Io(Error)

An low-level I/O error

Utf8(Utf8Error)

An error parsing a UTF-8 string

Nul(NulError)

A string NUL error

Conversion

Conversion error between types

Timeout

A timeout, particularly from a synchronous operation.

General(&'static str)

A general error with description

GeneralString(String)

A general error with description

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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

The lower-level source of this error, if any.

fn backtrace(&self) -> Option<&Backtrace>

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

Returns a stack backtrace, if available, of where this error occurred.

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

impl From<&'static str> for Error

fn from(descr: &'static str) -> Error

Create a general error from a string.

impl From<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(err: Error) -> Error

Converts to this type from the input type.

impl From<NulError> for Error

fn from(source: NulError) -> Self

Converts to this type from the input type.

impl From<String> for Error

fn from(descr: String) -> Error

Create a general error from a string.

impl From<Utf8Error> for Error

fn from(source: Utf8Error) -> Self

Converts to this type from the input type.

impl From<i32> for Error

fn from(rc: i32) -> Error

Create an error from a Paho C return code.