Struct Idb 

pub struct Idb { /* private fields */ }

The intensional database: the set of derived (output) facts.

Implementations

impl Idb

pub fn new() -> Self

Create an empty IDB.

pub fn get_relation(&self, predicate: &str) -> Option<&Relation>

Retrieve the relation for a predicate, if any.

pub fn insert(&mut self, predicate: &str, fact: Fact) -> bool

Insert a derived fact. Returns true if the fact was new.

pub fn total_facts(&self) -> usize

Total number of derived facts.

pub fn all_facts(&self) -> Vec<Fact>

Return every derived fact as a flat Vec.

Trait Implementations

impl Clone for Idb

fn clone(&self) -> Idb

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Idb

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

Formats the value using the given formatter.

impl Default for Idb

fn default() -> Idb

Returns the “default value” for a type.