Struct OutputContext 

pub struct OutputContext<'graph, C = (), O = ()> { /* private fields */ }

Read-only context passed to materialized output computations.

Implementations

impl<'graph, C, O> OutputContext<'graph, C, O>

pub fn input<T>(&self, input: InputNode<T>) -> Result<&'graph T, DeriveError>

where T: Clone + PartialEq + Send + Sync + 'static,

Reads a declared input dependency.

pub fn derived<T>( &self, derived: DerivedNode<T>, ) -> Result<&'graph T, DeriveError>

where T: Clone + PartialEq + Send + Sync + 'static,

Reads a declared scalar derived dependency.

pub fn map_collection<K, V>( &self, collection: CollectionNode<K, V>, ) -> Result<&'graph BTreeMap<K, V>, DeriveError>

where K: Clone + Ord + Send + Sync + 'static, V: Clone + PartialEq + Send + Sync + 'static,

Reads a declared map collection dependency.

pub fn set_collection<K>( &self, collection: CollectionNode<K, ()>, ) -> Result<&'graph BTreeSet<K>, DeriveError>

where K: Clone + Ord + Send + Sync + 'static,

Reads a declared set collection dependency.