Struct FilterMapValueTree

pub struct FilterMapValueTree<V, F, O> { /* private fields */ }

ValueTree corresponding to FilterMap.

Trait Implementations

impl<V: Clone + ValueTree, F: Fn(V::Value) -> Option<O>, O> Clone for FilterMapValueTree<V, F, O>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<V: Debug, F, O> Debug for FilterMapValueTree<V, F, O>

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

Formats the value using the given formatter.

impl<V: ValueTree, F: Fn(V::Value) -> Option<O>, O: Debug> ValueTree for FilterMapValueTree<V, F, O>

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.