Enum RegistrationError 

pub enum RegistrationError {
    Duplicate(ModeId),
    MissingModeSuffix(ModeId),
}

Why a registration failed.

Variants

Duplicate(ModeId)

A mode with this id is already registered. The registry never replaces a mode in place; a reload must unregister first.

MissingModeSuffix(ModeId)

The mode id does not end in -mode. Every mode id must carry the conventional -mode suffix (snippet-mode, emacs-keys-mode, …); M.2 groups (which never end in -mode) are not modes and never reach this path. Enforced at the single registration choke point so the convention can’t silently drift (mode_id.rs).

Trait Implementations

impl Clone for RegistrationError

fn clone(&self) -> RegistrationError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RegistrationError

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

Formats the value using the given formatter.

impl Display for RegistrationError

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

Formats the value using the given formatter.

impl Eq for RegistrationError

impl Error for RegistrationError

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.

impl PartialEq for RegistrationError

fn eq(&self, other: &RegistrationError) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for RegistrationError