Struct Facts 

pub struct Facts { /* private fields */ }

Facts - represents the working memory of data objects Similar to Grule’s DataContext concept

Implementations

impl Facts

pub fn create_object(pairs: Vec<(String, Value)>) -> Value

Create a generic object from key-value pairs

pub fn new() -> Self

Create a user object

pub fn add<T>(&self, name: &str, fact: T) -> Result<()>

where T: Serialize + Debug,

Add a fact object to the working memory

pub fn add_value(&self, name: &str, value: Value) -> Result<()>

Add a simple value fact

pub fn get(&self, name: &str) -> Option<Value>

Get a fact by name

pub fn get_nested(&self, path: &str) -> Option<Value>

Get a nested fact property (e.g., “User.Profile.Age”)

pub fn set(&self, name: &str, value: Value)

Set a fact value

pub fn set_nested(&self, path: &str, value: Value) -> Result<()>

Set a nested fact property

pub fn remove(&self, name: &str) -> Option<Value>

Remove a fact

pub fn clear(&self)

Clear all facts

pub fn get_fact_names(&self) -> Vec<String>

Get all fact names

pub fn count(&self) -> usize

Get fact count

pub fn contains(&self, name: &str) -> bool

Check if a fact exists

pub fn get_all_facts(&self) -> HashMap<String, Value>

Get all facts as a HashMap (for pattern matching evaluation)

pub fn get_fact_type(&self, name: &str) -> Option<String>

Get the type name of a fact

pub fn to_context(&self) -> Context

Convert to Context for rule evaluation

pub fn from_context(context: Context) -> Self

Create Facts from Context

pub fn merge(&self, other: &Facts)

Merge another Facts instance into this one

pub fn snapshot(&self) -> FactsSnapshot

Get a snapshot of all facts

pub fn restore(&self, snapshot: FactsSnapshot)

Restore from a snapshot

Trait Implementations

impl Clone for Facts

fn clone(&self) -> Facts

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Facts

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

Formats the value using the given formatter.

impl Default for Facts

fn default() -> Self

Returns the “default value” for a type.