Enum CoreError 

pub enum CoreError {
    Protocol(ProtocolError),
    Io(Error),
    NothingToUndo,
    NothingToRedo,
    NoPath,
    Cancelled,
}

Every error lattice-core returns.

Callers mostly propagate it with ? via CoreResult. The variants worth matching on are CoreError::NothingToUndo / CoreError::NothingToRedo (a user-facing no-op, not a failure) and CoreError::Cancelled (a cooperative abort, not a failure either).

Variants

Protocol(ProtocolError)

A position or range was invalid for the buffer it was applied to (out of bounds, or end < start). Raised by Buffer::slice, Buffer::apply_edit and everything built on them.

Io(Error)

A filesystem read or write failed — Document::open (including a file that is not valid UTF-8) or a save.

NothingToUndo

Document::undo with an empty undo stack.

NothingToRedo

Document::redo with an empty redo stack.

NoPath

Document::save on a document with no path.

Cancelled

A long-running operation was interrupted by a flipped [lattice_protocol::CancellationToken]. Bubbles up from the search hot loops so callers (grammar dispatcher, substitute) can map it to their domain-specific error.

Trait Implementations

impl Debug for CoreError

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

Formats the value using the given formatter.

impl Display for CoreError

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

Formats the value using the given formatter.

impl Error for CoreError

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 From<Error> for CoreError

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<ProtocolError> for CoreError

fn from(source: ProtocolError) -> Self

Converts to this type from the input type.