Struct CardinalityPolicy 

pub struct CardinalityPolicy { /* private fields */ }

Classifies each relation’s RelationCardinality for conflict detection.

Relations not in the single-valued set default to RelationCardinality::MultiValued: appending a duplicate is recoverable (dedup later), whereas wrongly superseding destroys a true fact, so the safe default is to append.

Implementations

impl CardinalityPolicy

pub fn with_single_valued<I, S>(relations: I) -> Self

where I: IntoIterator<Item = S>, S: Into<String>,

Builds a policy treating relations as single-valued, all others multi.

Relations are matched case-insensitively against the lowercased relation label, so "works at" and "Works At" classify alike.

pub fn cardinality(&self, relation: &str) -> RelationCardinality

Returns the cardinality of relation.

Trait Implementations

impl Clone for CardinalityPolicy

fn clone(&self) -> CardinalityPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CardinalityPolicy

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

Formats the value using the given formatter.

impl Default for CardinalityPolicy

fn default() -> CardinalityPolicy

Returns the “default value” for a type.