Struct BestLeastRecentlyViewed 

pub struct BestLeastRecentlyViewed { /* private fields */ }

Picks the available candidate that was least recently selected.

Candidates that have never been shown are treated as if they were last shown at turn 0, which gives them priority over candidates that have already been shown. Among candidates with equal “last seen” turns the one with the lower index wins.

This strategy is ideal for NPC barks and variation lines where you want maximum variety before repeating content.

Example

use bubbles::saliency::{BestLeastRecentlyViewed, Candidate, SaliencyStrategy};

let mut s = BestLeastRecentlyViewed::default();
let candidates = vec![
    Candidate { id: "a", available: true },
    Candidate { id: "b", available: true },
    Candidate { id: "c", available: true },
];

// First call - all unseen, picks index 0.
assert_eq!(s.select(&candidates), Some(0));
// Second call - "a" was just seen, picks "b" at index 1.
assert_eq!(s.select(&candidates), Some(1));
// Third call - picks "c" at index 2.
assert_eq!(s.select(&candidates), Some(2));
// Fourth call - all seen, wraps back to "a" (oldest).
assert_eq!(s.select(&candidates), Some(0));

Implementations

impl BestLeastRecentlyViewed

pub fn new() -> Self

Creates a fresh strategy with no history.

Trait Implementations

impl Clone for BestLeastRecentlyViewed

fn clone(&self) -> BestLeastRecentlyViewed

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BestLeastRecentlyViewed

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

Formats the value using the given formatter.

impl Default for BestLeastRecentlyViewed

fn default() -> BestLeastRecentlyViewed

Returns the “default value” for a type.

impl SaliencyStrategy for BestLeastRecentlyViewed

fn select(&mut self, candidates: &[Candidate<'_>]) -> Option<usize>

Returns the index into candidates of the chosen variant, or None to skip the group.