Struct RuleEngine 

pub struct RuleEngine { /* private fields */ }

A composable rule engine for task prioritization.

Supports sequential multi-layer evaluation (primary rule → tie-breaker) and weighted combination modes.

Example

use u_schedule::dispatching::{RuleEngine, SchedulingContext};
use u_schedule::dispatching::rules;

let engine = RuleEngine::new()
    .with_rule(rules::Edd)
    .with_tie_breaker(rules::Spt);

Implementations

impl RuleEngine

pub fn new() -> Self

Creates an empty rule engine.

pub fn with_rule<R: DispatchingRule + 'static>(self, rule: R) -> Self

Adds a primary rule (weight 1.0).

pub fn with_weighted_rule<R: DispatchingRule + 'static>( self, rule: R, weight: f64, ) -> Self

Adds a weighted rule.

pub fn with_tie_breaker<R: DispatchingRule + 'static>(self, rule: R) -> Self

Adds a tie-breaking rule (weight 0.0, used only in Sequential mode).

pub fn with_mode(self, mode: EvaluationMode) -> Self

Sets the evaluation mode.

pub fn with_final_tie_breaker(self, tie_breaker: TieBreaker) -> Self

Sets the final tie-breaking strategy.

pub fn sort_indices( &self, tasks: &[Task], context: &SchedulingContext, ) -> Vec<usize>

Sorts tasks by priority (highest priority first).

Returns indices into the original task slice, sorted by rule evaluation.

pub fn select_best( &self, tasks: &[Task], context: &SchedulingContext, ) -> Option<usize>

Returns the index of the highest-priority task.

pub fn evaluate( &self, task: &Task, context: &SchedulingContext, ) -> Vec<RuleScore>

Evaluates a single task and returns scores from each rule.

Trait Implementations

impl Clone for RuleEngine

fn clone(&self) -> RuleEngine

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RuleEngine

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

Formats the value using the given formatter.

impl Default for RuleEngine

fn default() -> Self

Returns the “default value” for a type.