Enum BacktrackingError 

#[non_exhaustive]
pub enum BacktrackingError {
    AtLeaf,
    ChoiceOutOfRange,
    DeltaOutOfRange,
    NotLeaf,
    AlreadyVisited,
    AtRoot,
}

A disabled BacktrackingTraversal transition.

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.

AtLeaf

Descent is disabled at a full-depth leaf.

ChoiceOutOfRange

The branch choice is outside the admitted branch set.

DeltaOutOfRange

The mutation delta is outside the required inverse-pair domain.

NotLeaf

Visit requires a full-depth leaf.

AlreadyVisited

The current leaf was already recorded.

AtRoot

Ascent is disabled at the root.

Trait Implementations

impl Clone for BacktrackingError

fn clone(&self) -> BacktrackingError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BacktrackingError

impl Debug for BacktrackingError

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

Formats the value using the given formatter.

impl Display for BacktrackingError

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

Formats the value using the given formatter.

impl Eq for BacktrackingError

impl Error for BacktrackingError

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 BacktrackingError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BacktrackingError