Enum GraphReference 

pub enum GraphReference<'reference, 'graph> {
    Gbz(&'reference GBZ),
    Db(&'reference mut GraphInterface<'graph>),
    None,
}

A reference to a GBZ-compatible graph.

Graph operations with a GBZ graph take an immutable reference to the graph. The corresponding operations with GBZ-base using GraphInterface take a mutable reference instead. This wrapper can be created on demand to encapsulate a reference to either type of graph.

Variants

Gbz(&'reference GBZ)

A GBZ graph.

Db(&'reference mut GraphInterface<'graph>)

A GraphInterface.

None

No graph provided.

Implementations

impl<'reference, 'graph> GraphReference<'reference, 'graph>

pub fn gbz_record(&mut self, handle: usize) -> Result<GBZRecord, String>

Returns the record for the oriented node corresponding to the given handle.

Errors

Returns an error if the handle does not exist in the graph. Returns an error if the graph reference is Self::None. Passes through any errors from the graph implementation.

pub fn graph_name(&mut self) -> Result<GraphName, String>

Returns the stable graph name (pggname) for the graph.

Returns an empty name if the graph reference is Self::None.

Errors

Returns an empty object if the corresponding GBZ tags cannot be parsed. Passes through any errors from the graph implementation.

pub fn is_none(&self) -> bool

Returns true if the graph reference is Self::None.