Struct FallbackExtractor 

pub struct FallbackExtractor<P, S> {
    pub primary: P,
    pub secondary: S,
}

Two-stage extractor: secondary runs only when primary.extract succeeds with an empty Vec. Errors from primary propagate unchanged — secondary is a recall-extension fallback, not an error-handling retry path.

Default M2 wiring (Task 2.4.6): BuiltinExtractor → LlmEntityExtractor. The cheap regex primary handles known typed-prefix IDs synchronously; the LLM secondary only fires on truly free-form text.

Fields

primary: P

First-pass extractor — usually a cheap, deterministic recogniser.

secondary: S

Recall-extension extractor — runs only when primary returned Ok(vec![]).

Implementations

impl<P, S> FallbackExtractor<P, S>

pub fn new(primary: P, secondary: S) -> Self

Build a chain with the given primary + secondary extractors.

Trait Implementations

impl<P, S> EntityExtractor for FallbackExtractor<P, S>

where P: EntityExtractor, S: EntityExtractor,

fn extract<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, text: &'life1 str, hints: &'life2 [EntityRef], ) -> Pin<Box<dyn Future<Output = Result<Vec<EntityRef>, MemoryError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Extract entities from text, merging with caller-supplied hints.