Struct PerturbValueTree

pub struct PerturbValueTree<S, F> { /* private fields */ }

ValueTree perturbation adaptor.

See Strategy::prop_perturb().

Trait Implementations

impl<S: Clone, F> Clone for PerturbValueTree<S, F>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<S: Debug, F> Debug for PerturbValueTree<S, F>

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

Formats the value using the given formatter.

impl<S: ValueTree, O: Debug, F: Fn(S::Value, TestRng) -> O> ValueTree for PerturbValueTree<S, F>

type Value = O

The type of the value produced by this ValueTree.

fn current(&self) -> O

Returns the current value.

fn simplify(&mut self) -> bool

Attempts to simplify the current value. Notionally, this sets the “high” value to the current value, and the current value to a “halfway point” between high and low, rounding towards low.

fn complicate(&mut self) -> bool

Attempts to partially undo the last simplification. Notionally, this sets the “low” value to one plus the current value, and the current value to a “halfway point” between high and the new low, rounding towards low.