Enum Error 

#[non_exhaustive]
pub enum Error {
    Unsupported,
    LibraryLoad(String),
    Backend(String),
    Disconnected,
}

Errors produced by ldtray.

The most important variants for daemons are Error::Unsupported and Error::LibraryLoad: both mean “no tray here, but nothing is wrong with your program”. Treating them as non-fatal is the intended usage.

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.

Unsupported

The current platform has no tray backend, or no display/session is available (for example a headless server, or an unknown target OS).

LibraryLoad(String)

A required platform library could not be loaded at runtime. The string carries the underlying loader message. This is the expected error on a machine where the GUI stack simply is not installed.

Backend(String)

The backend was reachable but rejected an operation. The string carries a human-readable description.

Disconnected

The event loop is no longer running, so a crate::TrayHandle command could not be delivered.

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, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for Error

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.