Struct LengthBasedExampleSelector 

pub struct LengthBasedExampleSelector { /* private fields */ }

Selector that caps the rendered example total at a character budget.

Drops trailing examples until the rendered character length fits. The cap measures raw UTF-8 character count over the concatenated rendered examples joined by \n — coarse but deterministic and dependency-free.

Implementations

impl LengthBasedExampleSelector

pub const fn new( examples: Vec<Example>, example_prompt: PromptTemplate, max_chars: usize, ) -> Self

Build a length-based selector. example_prompt is the same template used by the parent FewShotPromptTemplate; rendered length is what counts.

pub fn examples(&self) -> &[Example]

Borrow the example pool.

Trait Implementations

impl Clone for LengthBasedExampleSelector

fn clone(&self) -> LengthBasedExampleSelector

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LengthBasedExampleSelector

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

Formats the value using the given formatter.

impl ExampleSelector for LengthBasedExampleSelector

fn select(&self, _input_vars: &HashMap<String, String>) -> Result<Vec<Example>>

Select examples for an invocation. input_vars are the suffix variables the caller will pass at render time — selectors may use them to score relevance; FixedExampleSelector ignores them.