Struct Edb 

pub struct Edb { /* private fields */ }

The extensional database: the set of base (input) facts.

Implementations

impl Edb

pub fn new() -> Self

Create an empty EDB.

pub fn add_fact(&mut self, fact: Fact)

Insert a base fact.

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

Retrieve the relation for a predicate, if any.

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

List the names of all predicates in the EDB.

pub fn total_facts(&self) -> usize

Total number of base facts across all predicates.

Trait Implementations

impl Clone for Edb

fn clone(&self) -> Edb

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Edb

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

Formats the value using the given formatter.

impl Default for Edb

fn default() -> Edb

Returns the “default value” for a type.