Enum BacktrackStep 

pub enum BacktrackStep {
    Choice(Ref),
    Failed,
}

Result of advancing a Backtracker: the next alternative, or failure.

Variants

Choice(Ref)

The next untried alternative to commit to.

Failed

No alternatives remain; the search has exhausted this point.

Trait Implementations

impl Clone for BacktrackStep

fn clone(&self) -> BacktrackStep

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BacktrackStep

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

Formats the value using the given formatter.

impl Eq for BacktrackStep

impl PartialEq for BacktrackStep

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for BacktrackStep