Function expand_iri_simple 

pub fn expand_iri_simple<W, N, L, H>(
    env: &mut Environment<'_, N, L, H>,
    active_context: &Context<N::Iri, N::BlankId>,
    value: Nullable<ExpandableRef<'_>>,
    document_relative: bool,
    vocab: Option<Action>,
) -> IriExpansionResult<N>
where
    N: VocabularyMut,
    N::Iri: Clone,
    N::BlankId: Clone,
    W: From<MalformedIri>,
    H: Handler<N, W>,

Expands value into an IRI using only the term definitions active_context already has.

The loader-free counterpart of expand_iri_with: it never creates a term definition on demand, so it can only be used once the enclosing context has been processed, or for values that cannot introduce a dependency (@vocab, @index, a relative-IRI term).

document_relative allows a value that is otherwise unresolvable to be resolved against the active context’s base IRI. vocab enables expansion through the vocabulary mapping and selects what to do when that is the only thing that would make the value expand; None disables it entirely.

Results are memoized per active context for the dominant call shape — a string value with vocab: Some(Action::Keep) and document_relative off — which is what makes repeated keys across the nodes of a document cheap.

Errors

Returns an error when the value cannot be expanded into an IRI with the definitions already in the active context.