Enum EngineError 

pub enum EngineError {
    Regex(Error),
    InvalidRange(String),
    Ex(String),
    ReadOnly,
    OutOfBounds(Pos),
    SnapshotVersion(u32, u32),
}

Errors surfaced from the engine to the host. Intentionally narrow — callsites that fail in user-facing ways return Result<_, EngineError>; internal invariant breaks use debug_assert!.

Variants

Regex(Error)

:s/pat/.../ couldn’t compile the pattern. Host displays the regex error in the status line.

InvalidRange(String)

:[range] parse failed.

Ex(String)

Ex command parse failed (unknown command, malformed args).

ReadOnly

Edit attempted on a read-only buffer.

OutOfBounds(Pos)

Position passed by the caller pointed outside the buffer.

SnapshotVersion(u32, u32)

Snapshot version mismatch. Host should treat as “abandon snapshot” rather than attempt migration.

Trait Implementations

impl Debug for EngineError

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

Formats the value using the given formatter.

impl Display for EngineError

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

Formats the value using the given formatter.

impl Error for EngineError

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 EngineError

fn from(source: Error) -> Self

Converts to this type from the input type.