Struct DecisionTrace 

pub struct DecisionTrace { /* private fields */ }

One plan’s decisions, in the order it made them.

Ordering

Selection order is the trace’s own meaning, so an identity may be derived from it: two plans that decided the same things in a different order decided differently.

Implementations

impl DecisionTrace

pub fn encode_into(&self, into: &mut Vec<u8>)

Appends this trace’s canonical bytes: the entry count, then every entry in selection order.

impl DecisionTrace

pub fn from_entry(entry: TraceEntry) -> Self

The one-entry trace, for a plan that decided once.

pub fn recorded(offered: Vec<TraceEntry>) -> Result<Self, NonEmptyError>

Records these entries as the decisions a plan made, in the order they are offered.

Errors

Returns NonEmptyError when no entry is offered, or when more are offered than a trace admits.

pub fn first(&self) -> &TraceEntry

The first decision the plan made, which every trace has.

pub fn entries(&self) -> &NonEmpty<TraceEntry, TRACE_ENTRY_LIMIT>

The entries, in selection order; structurally at least one.

Trait Implementations

impl Clone for DecisionTrace

fn clone(&self) -> DecisionTrace

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DecisionTrace

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

Formats the value using the given formatter.

impl Eq for DecisionTrace

impl Hash for DecisionTrace

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for DecisionTrace

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for DecisionTrace