Struct Pattern 

pub struct Pattern {
    pub fact_type: String,
    pub constraints: Vec<PatternConstraint>,
    pub name: Option<String>,
}

A pattern matches facts of a specific type with constraints

Fields

fact_type: String

Fact type (e.g., “Person”, “Order”)

constraints: Vec<PatternConstraint>

List of constraints

name: Option<String>

Optional pattern name for reference

Implementations

impl Pattern

pub fn new(fact_type: String) -> Self

Create new pattern

pub fn with_constraint(self, constraint: PatternConstraint) -> Self

Add constraint

pub fn with_name(self, name: String) -> Self

Set pattern name

pub fn matches( &self, facts: &TypedFacts, bindings: &HashMap<Variable, FactValue>, ) -> Option<HashMap<Variable, FactValue>>

Match this pattern against a fact

pub fn match_in_working_memory( &self, wm: &WorkingMemory, bindings: &HashMap<Variable, FactValue>, ) -> Vec<(FactHandle, HashMap<Variable, FactValue>)>

Match pattern against working memory

Trait Implementations

impl Clone for Pattern

fn clone(&self) -> Pattern

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Pattern

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

Formats the value using the given formatter.