Struct GraphBuilder 

pub struct GraphBuilder { /* private fields */ }

Implementations

impl GraphBuilder

pub fn new() -> Self

pub fn with_capacity(nodes: usize, edges: usize) -> Self

Creates a builder with storage sized for the expected graph.

pub fn add_node(&mut self, node: Node) -> Result<&mut Self>

Adds a node idempotently.

Errors

Returns an error when the same identifier already has a different definition or the node contains an invalid source span.

pub fn add_edge(&mut self, edge: Edge) -> Result<&mut Self>

Adds an edge idempotently. Endpoint existence is validated by build, so callers may insert edges before nodes.

Errors

Returns an error when provenance or its source span is invalid.

pub fn build(self) -> Result<Graph>

Validates all endpoints and returns an immutable graph.

Errors

Returns an error when an edge references a missing source or target.

Trait Implementations

impl Debug for GraphBuilder

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

Formats the value using the given formatter.

impl Default for GraphBuilder

fn default() -> GraphBuilder

Returns the “default value” for a type.