Struct Shells 

pub struct Shells;

Concentric L-infinity shells from a chosen origin.

Trait Implementations

impl Strategy for Shells

fn name(&self) -> StrategyName

The strategy’s name. Mirrors StrategyName.

fn accepts_input(&self, idx: Option<&IndexFn>) -> bool

V4 input-shape check (spec §3.6). None represents an input with no closed-form index function; only Lex accepts that. Concrete IndexFn variants are accepted per the per-strategy rules in spec §3.6’s table.

fn has_closed_form_for(&self, idx: &IndexFn) -> bool

R2 push-down eligibility (spec §10.2 R2). true if this strategy has a closed-form indexed lookup over the given input. If false, apply uses the strategy’s fallback reorder over the materialized tuples.

fn apply(&self, input: &EvaluatedInput, truncation: Option<u64>) -> Vec<Tuple>

Apply this strategy to the given input.

fn apply_seeded( &self, input: &EvaluatedInput, truncation: Option<u64>, seed: Option<u64>, ) -> Vec<Tuple>

apply under an authored seed (comprehension_forms.md §3.6): a seeded strategy (Shuffle, Lhs) derives its state from seed and the input’s structural identity, and from its fixed default when seed is None. Every other strategy ignores the seed.