Enum Relationship 

pub enum Relationship {
    Prerequisite,
    LeadsTo,
    RelatesTo,
    Extends,
    Introduces,
    Covers,
    VariantOf,
    ContrastsWith,
    AnswersQuestion,
    Custom(String),
}

Relationship types for graph edges.

Common relationships are first-class variants for pattern matching and exhaustive checks. Domain-specific relationships use Custom(String).

Per Amendment §2b, this enum-with-Custom approach avoids generic type parameter infection across the entire graph infrastructure.

Example

use fabryk_graph::Relationship;

let prereq = Relationship::Prerequisite;
assert_eq!(prereq.default_weight(), 1.0);

let custom = Relationship::Custom("implies".to_string());
assert_eq!(custom.default_weight(), 0.5);

Variants

Prerequisite

A must be understood before B.

LeadsTo

Understanding A naturally leads to B.

RelatesTo

A and B are conceptually related.

Extends

A extends or generalises B.

Introduces

Source A introduces concept B.

Covers

Source A covers concept B.

VariantOf

A is a source-specific variant of canonical concept B.

ContrastsWith

A contrasts with or is an alternative to B.

AnswersQuestion

A answers or addresses question B.

Custom(String)

Domain-specific relationship not covered above.

Implementations

impl Relationship

pub fn default_weight(&self) -> f32

Default weight for this relationship type.

Used when the extractor doesn’t specify an explicit weight. Weights influence pathfinding algorithms like shortest_path.

pub fn name(&self) -> &str

Returns the relationship name as a string.

Trait Implementations

impl Clone for Relationship

fn clone(&self) -> Relationship

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Relationship

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

Formats the value using the given formatter.

impl Default for Relationship

fn default() -> Relationship

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Relationship

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for Relationship

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Relationship

fn eq(&self, other: &Relationship) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Relationship

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Relationship

impl StructuralPartialEq for Relationship