Struct PolicyTreeBuilder 

pub struct PolicyTreeBuilder {
    evaluators: Vec<Arc<dyn Evaluator>>,
    declarations: Vec<PolicyDeclaration>,
}

Builds a PolicyTree from a set of evaluators and the policies that use them.

Fields

evaluators: Vec<Arc<dyn Evaluator>>

declarations: Vec<PolicyDeclaration>

Implementations

impl PolicyTreeBuilder

pub fn register_evaluator( &mut self, evaluator: Arc<dyn Evaluator>, ) -> EvaluatorId

Register an evaluator, returning the id later policies reference. One evaluator may serve many policies.

pub fn add_policy(&mut self, declaration: PolicyDeclaration) -> PolicyId

Add a policy, returning its PolicyId. Policies are assigned ids in the order they are added here, which becomes the tree’s presentational evaluation order.

Panics if declaration.predicate names an evaluator id that was not returned by register_evaluator on this builder — a programmer error in the caller wiring up the tree, not a runtime condition. Predicate::Unusable needs no such check: it names no evaluator to have registered.

pub fn build(self) -> PolicyTree

Build the tree.

Trait Implementations

impl Default for PolicyTreeBuilder

fn default() -> PolicyTreeBuilder

Returns the “default value” for a type.